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User’s

Manual

Yoko ga

Electric Corporation

Model UYF200, UYFA21

Ultrasonic Vortex

Flowmeters

(Style Code:S2)

IM 1F5B2-01E

4th Edition

IM 1F5B2-01E

Contents

1. INTRODUCTION ................................................................................................... 1-1

2. HANDLING PRECAUTIONS............................................................................... 2-1

2.1 Cross-check of the Model Code and Specifications ...................................... 2-1

2.2 Precautions Regarding Transportation............................................................ 2-1

2.3 Precautions Regarding Storage Location........................................................ 2-2

2.4 Precautions Regarding Installation Location .................................................. 2-2

2.5 Precautions Regarding Pipelines..................................................................... 2-3

2.6 Precautions Regarding Use of Transceivers ................................................... 2-4

2.7 Precautions Regarding Insulation Resistance and Withstanding

Voltage Tests................................................................................................... 2-4

2.8 Notes on JIS Flameproof Flowmeters ............................................................ 2-5

2.9 Installation Precautions for CENELEC (KEMA) Intrinsic Safty .................. 2-5

2.10 Installation Precautions for CENELEC (KEMA) Explosionproof ................ 2-6

3. COMPONENTS OF ULTRA YEWFLO ............................................................. 3-1

4. MOUNTING ............................................................................................................ 4-1

4.1 Piping Precautions........................................................................................... 4-1

4.2 Mounting ULTRA YEWFLO ......................................................................... 4-7

4.2.1 Mounting a Wafer Type of ULTRA YEWFLO.................................. 4-7

4.2.2 Installing a Flange Type of ULTRA YEWFLO ............................... 4-10

4.3 Mounting remote type converter................................................................... 4-12

4.4 Repositioning the Indicator/Totalizer Component ....................................... 4-12

4.5 Swiveling the Indicator/Totalizer Component.............................................. 4-13

4.6 Insulating the Piping ..................................................................................... 4-14

5. WIRING ................................................................................................................... 5-1

5.1 Selecting the Cable ......................................................................................... 5-1

5.2 Connecting Field Mounting Indicator (applies to analog output only) ......... 5-2

5.3 Wiring.............................................................................................................. 5-3

5.4 Grounding........................................................................................................ 5-5

5.5 Signal cable end finish procedure................................................................... 5-6

5.6 Power Supply Voltage and Load Resistance.................................................. 5-7

5.7 Pulse output ..................................................................................................... 5-8

5.8 Simultaneous Analog-Pulse Output ................................................................ 5-9

6. PREPARING FOR OPERATION ........................................................................ 6-1

6.1 Checking the Flowrate Range......................................................................... 6-1

6.2 Pressure Loss and Cavitation .......................................................................... 6-3

6.3 Zero Adjustment.............................................................................................. 6-3

6.4 Resetting totalized value ................................................................................. 6-3

6.5 Action Against Power Failure......................................................................... 6-4

6.6 Precautions During Startup ............................................................................. 6-4

4th Edition: Mar. 2004 (YG)

IM 1F5B2-01E

7. WORKING WITH THE BT200 BRAIN TERMINAL ...................................... 7-1

7.1 Connection of a BT200 Terminal and Notes on Use ..................................... 7-1

7.1.1 Connection of a BT200 Terminal ........................................................ 7-1

7.1.2 Notes on Use ........................................................................................ 7-2

7.2 Working with the BT200 ................................................................................ 7-3

7.2.1 Layout of Keys..................................................................................... 7-3

7.2.2 Functionality of Operating Keys ......................................................... 7-4

7.3 Configuring Parameters with the BT200 ........................................................ 7-5

7.3.1 Screens for Parameter Setup ................................................................ 7-5

7.3.2 Configuring Parameters ....................................................................... 7-6

7.4 Parameter Summary ........................................................................................ 7-7

7.5 Self-checking ................................................................................................. 7-10

7.5.1 Checking for Failures......................................................................... 7-10

7.5.2 Information on Failures and Corrective Measures ............................ 7-11

8. MAINTENANCE .................................................................................................... 8-1

8.1 Equipment Needed for Maintenance .............................................................. 8-2

8.2 Adjustment ...................................................................................................... 8-3

8.2.1 Zero Adjustment .................................................................................. 8-3

8.2.2 Span Adjustment .................................................................................. 8-3

8.2.3 Trigger Level Adjustment (TLA) (Parameter H10) ............................ 8-4

8.2.4 Loop Tests (Parameters F10 and F20) ................................................ 8-4

8.3 Disassembly and Reassembly ......................................................................... 8-5

8.3.1 Removing the Indicator/Totalizer Component .................................... 8-5

8.3.2 Removing the Amplifier Unit .............................................................. 8-6

8.3.3 Replacing the Sensor Assembly .......................................................... 8-7

8.4 Troubleshooting............................................................................................. 8-10

8.4.1 Basic Troubleshooting Flow .............................................................. 8-10

8.4.2 Specific Troubleshooting Flows ........................................................ 8-11

8.4.3 Instructions on Use of Check Terminals of Amplifier Unit ............. 8-15

9. STANDARD SPECIFICATIONS.......................................................................... 9-1

9.1 STANDARD SPECIFICATION .................................................................... 9-1

9.2 Model and Suffix Codes ................................................................................. 9-4

9.3 Option Specifications ...................................................................................... 9-6

9.4 EXTERNAL DIMENSIONS .......................................................................... 9-7

INSTALLATION AND OPERATING PRECAUTIONS FOR JIS FLAMEPROOF

EQUIPMENT......................................................................................................... EX-B01E

Customer Maintenance Parts List ....................................................... CMPL 1F5B2-01E

Customer Maintenance Parts List ....................................................... CMPL 1F5B2-03E

Customer Maintenance Parts List ....................................................... CMPL 1F5B2-04E

1-1

IM 1F5B2-01E

1. INTRODUCTION

The UYF200 series of ultrasonic vortex flowmeters, one in the family of YEWFLO

flowmeters, has been fine-tuned to your order specifications prior to shipment. Before

use, read this manual thoroughly and familiarize yourself fully with the features,

operations and handling of ULTRA YEWFLO to have the instrument deliver its full

capabilities and to ensure its efficient and correct use.

■ Notices Regarding This Manual

•This manual should be passed on to the end user.

• The contents of this manual are subject to change without prior notice.

any form or by any means without the written permission of Yokogawa Electric

Corporation (hereinafter simply referred to as Yokogawa).

• This manual does not warrant the marketability of this instrument nor does it warrant

that the instrument will suit a particular purpose of the user.

• Every effort has been made to ensure accuracy in the contents of this manual.

However, should any questions arise or errors come to your attention, please contact

your nearest Yokogawa sales office that appears on the back of this manual or the

sales representative from which you purchased the product.

•This manual is not intended for models with custom specifications.

• Revisions may not always be made in this manual in conjunction with changes in

specifications, constructions and/or components if such changes are not deemed to

interfere with the instrument’s functionality or performance.

■ Notices Regarding Safety and Modification

• For the protection and safety of personnel, the instrument and the system comprising

the instrument, be sure to follow the instructions on safety described in this manual

when handling the product. If you handle the instrument in a manner contrary to

these instructions, Yokogawa does not guarantee safety.

• As for explosion-proof model, if you yourself repair or modify the instrument and

then fail to return it to its original form, the explosion-protected construction of the

instrument will be impaired, creating a hazardous condition. Be sure to consult

Yokogawa for repairs and modifications.

• The following safety symbols and cautionary notes are used on the product and in this

manual:

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IM 1F5B2-01E

WARNING

This symbol is used to indicate that a hazardous condition will result which, if not

avoided, may lead to loss of life or serious injury. This manual describes how the

operator should exercise care to avoid such a risk.

CAUTION

This symbol is used to indicate that a hazardous condition will result which, if not

avoided, may lead to minor injury or material damage. This manual describes how the

operator should exercise care to avoid a risk of bodily injury or damage to the instru-

ment.

IMPORTANT

This symbol is used to call your attention to a condition that must be observed in order

to avoid the risk of damage to the instrument or system problems.

NOTE

This symbol is used to call your attention to information that should be referred to in

order to know the operations and functions of the instrument.

For Safe Use of ULTRA YEWFLO

WARNING

• If the process fluid is harmful to personnel, handle ULTRA YEWFLO carefully even

after it has been removed from the process line for maintenance or other purposes.

Exercise extreme care to prevent the fluid from coming into contact with human flesh

and to avoid inhaling any residual gas.

CAUTION

• When carrying ULTRA YEWFLO around, exercise extreme care to avoid dropping it

accidentally and causing bodily injury.

CAUTION

• The /JF1 option code indicates that the model in question is an officially certified

explosion-protected instrument. Stringent regulations, therefore, apply with regard to

the construction, installation location, external wiring, maintenance and repair of

ULTRA YEWFLO. Care must be taken since using ULTRA YEWFLO in disregard

of these regulations may create a hazardous condition. ALWAYS before handling

ULTRA YEWFLO, be sure to read “Installation and Operating Precautions for

Flameproof Explosion-Protected Instruments” at the end of this manual.

1-3

IM 1F5B2-01E

1. INTRODUCTION

Warranty

• The warranty of this instrument shall cover the period noted on the quotation pre-

sented to the Purchaser at the time of purchase. The Seller shall repair the instrument

at free of charge when the failure occurred during the warranty period.

• All inquiries on instrument failure should be directed to the Seller’s sales representa-

tive from whom you purchased the instrument or your nearest sales office of the

Seller.

• Should the instrument fail, contact the Seller specifying the model and instrument

number of the product in question. Be specific in describing details on the failure and

the process in which the failure occurred. It will be helpful if schematic diagrams

and/or records of data are attached to the failed instrument.

• Whether or not the failed instrument should be repaired free of charge shall be left

solely to the discretion of the Seller as a result of an inspection by the Seller.

■ The Purchaser shall not be entitled to receive repair services from the Seller free

of charge, even during the warranty period, if the malfunction or damage is due

to:

• improper and/or inadequate maintenance of the instrument in question by the Pur-

chaser.

• handling, use or storage of the instrument in question beyond the design and/or

specifications requirements.

•use of the instrument in question in a location not conforming to the conditions

specified in the Seller's General Specification or Instruction Manual.

•retrofitting and/or repair by a party other than the Seller or a party to whom the Seller

has entrusted repair services.

• improper relocation of the instrument in question after delivery.

• reason of force measure such as fires, earthquakes, storms/floods, thunder/lightning,

or other reasons not attributable to the instrument in question.

2-1

IM 1F5B2-01E

2. HANDLING PRECAUTIONS

All of the instruments in the UYF200 series of ultrasonic vortex flowmeters are thor-

oughly tested at the factory before shipment.

■ After you have received the ordered ULTRA YEWFLO flowmeter, visually check it

to ensure that the flowmeter is free from damage.

■ This chapter contains cautionary notes that must be observed when handling ULTRA

YEWFLO. Carefully read this chapter first.

■ For topics other than those found in this chapter, refer to the relevant heading of a

chapter, section or subsection.

■ If any questions arise, contact the vendor from whom you purchased ULTRA

YEWFLO or your nearest office of the Yokogawa service network.

2.1 Cross-check of the Model Code and Specifications

The model code and specifications are indicated on the data plate attached to the case of

ULTRA YEWFLO. Cross-check this information with that in the table in Section 9.2,

“Model and Suffix Codes,” to ensure that ULTRA YEWFLO is as specified in the order

instructions.

Figure 2.1 Example of Data Plate

2.2 Precautions Regarding Transportation

To protect against accidental damage to ULTRA YEWFLO while transporting it to a

new location, pack it in the original packing as when shipped from the Yokogawa

factory.

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IM 1F5B2-01E

2.3 Precautions Regarding Storage Location

Deterioration in insulation or corrosion can occur for unexpected reasons if ULTRA

YEWFLO is left uninstalled for a prolonged period after delivery. If ULTRA YEWFLO

is likely to be stored over a prolonged period, observe the following precautions.

■ Choose a storage location that satisfies the following requirements:

• Not exposed to rain or splashwater.

• Less susceptible to mechanical vibration or shock.

•Kept within the temperature and humidity ranges shown in the following table,

preferably at normal temperature and humidity (approximately 25˚C and 65%).

erutarepmeT04- ° 58+ot °C

ytidimuH)gnisnednoc-non(%001ot5

2.4 Precautions Regarding Installation Location

ULTRA YEWFLO is designed to operate even under harsh environmental conditions,

virtually placing no limits to your choice of installation location. When determining the

location, however, consider the following for easy routine inspection and operation and

for use in a stable condition with high accuracy over a prolonged period.

■ Ambient Temperature

Whenever possible, avoid mounting ULTRA YEWFLO in a location with a great

temperature gradient and/or temperature variation. If ULTRA YEWFLO is likely to be

exposed to heat radiating from the plant, insulate ULTRA YEWFLO or mount it where

there is adequate ventilation.

■ Atmospheric Conditions

Whenever possible, avoid mounting ULTRA YEWFLO in a corrosive atmosphere. If

ULTRA YEWFLO needs to be used in such an area, insure that ULTRA YEWFLO is

installed where there is adequate ventilation. Care must also be taken to prevent

rainwater from getting inside and/or remaining inside the cable conduit.

■ Mechanical Shock or Vibration

ULTRA YEWFLO is designed to withstand mechanical shock or vibration. Whenever

possible, however, mount ULTRA YEWFLO in a location that is less susceptible to

such shock or vibration. If ULTRA YEWFLO needs to be mounted on a pipeline where

relatively strong mechanical vibration is present, equip the line with a pipe support (see

Figure 2.4).

■ Requirements for Piping and Process Fluid

Restrictions apply to the piping and process fluid. Before mounting ULTRA YEWFLO,

be sure to read Section 4.1, “Piping Precautions.”

■ Installation of Explosion-protected Instruments

ULTRA YEWFLO can be mounted and used in a hazardous area, as specified in the

flameproof certification mentioned in this manual. Important cautionary notes are found

in “Installation and Operating Precautions for Flameproof Explosion-Protected Instru-

ments” at the end of this manual. Be sure to read the notes when mounting ULTRA

YEWFLO.

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IM 1F5B2-01E

2. HANDLING PRECAUTIONS

Pipe support

ULTRA YEWFLO

Pipeline

Figure 2.4 Example of Pipe Support

■ Other Considerations

• Choose a location where there is sufficient clearance around ULTRA YEWFLO to

allow such work as routine inspections.

• Choose a location that ensures easy wiring and piping.

• It will be to your advantage if you equip the installation location with lighting for

night-time maintenance and inspections, power outlets for measuring instruments and

wired phone jacks for contact with the supervisory control room.

2.5 Precautions Regarding Pipelines

When turning on a process fluid through a pipeline, observe the following instructions to

use ULTRA YEWFLO to the intended degree of safety.

■ Make sure the bolts that fasten ULTRA YEWFLO and the pipeline together are

securely tightened.

■ Make sure no fluid is leaking from the pipeline.

■ Do not apply a pressure exceeding the specified limit.

• ULTRA YEWFLO is under constant pressure while a process fluid is flowing. Do

NOT loosen the bolts that fasten the flanges. If you loosen the bolts, there is a risk of

the process fluid gushing out of the pipeline.

• If the process fluid is toxic or otherwise harmful to personnel, exercise extreme care

to prevent the fluid from coming into contact with the eyes or skin and to avoid

inhaling any released gas.

WARNING

2-4

IM 1F5B2-01E

2.6 Precautions Regarding Use of Transceivers

IMPORTANT

• ULTRA YEWFLO is designed with full consideration of and measures against

interference from high-frequency noise. It is likely, however, that ULTRA YEWFLO

is affected by such noise if you use a transceiver near the instrument or the cable

wired to it. When using a transceiver, assess its influence on the loop where ULTRA

YEWFLO is connected by first locating it a few meters away from the ULTRA

YEWFLO’s converter component and then bringing it gradually closer in. Use the

transceiver at distances that do not cause a problem.

2.7 Precautions Regarding Insulation Resistance and

Withstanding Voltage Tests

• Insulation resistance and withstanding voltage tests can deteriorate insulation and

degrade safety even if the testing voltages are at levels that may not cause the

insulation to break down. Keep the application of these tests to a minimum.

• During insulation resistance testing, do not apply voltages exceeding 500 V DC.

• During withstanding voltage testing, do not apply voltages exceeding 500 V AC.

• Follow the procedures summarized below to run these tests. During testing, leave the

cable of the transmission line disconnected.

• Insulation Resistance Test Procedure

<1> Wire a cross-over cable from the SUPPLY "+" terminal through the PULSE "+"

to "-" terminals.

<2> Connect an insulation resistance meter (with the power switched off) between

the cross-over cable and the grounding terminal. Use the cross-over cable as the

positive-polarity test point and the grounding terminal as the negative-polarity

test point.

<3> Turn on the insulation resistance meter and measure the insulation resistance.

<4> After the completion of testing, remove the insulation resistance meter, connect a

100-kΩ resistor across the cross-over cable and the grounding terminal, and

allow at least one second for the accumulated electricity to discharge. (Do not

touch the terminals during discharge.)

• Withstanding Voltage Test Procedure

<1> Wire a cross-over cable from the SUPPLY "+" terminal through the PULSE "+"

to "-" terminals.

<2> Connect a withstanding voltage tester between the cross-over cable and the

grounding terminal. Connect the ground-side terminal to the grounding terminal.

<3> Gradually raise the testing voltage from 0 V to the specified level.

<4> Keep the voltage at the specified level for one minute.

<5> After the completion of testing, gradually lower the testing voltage to prevent a

power surge.

2-5

IM 1F5B2-01E

2. HANDLING PRECAUTIONS

2.8 Notes on JIS Flameproof Flowmeters

CAUTION

Models of ULTRA YEWFLO with the optional JIS flameproof feature are designed to

operate even in a hazardous atmosphere (Class 1 or Class 2 Area) that may produce the

explosive gas or gases indicated in the Users’ Guidelines for Explosion-Protected,

Factory-Use Electrical Equipment (Protection against Explosive Gas Atmospheres—

1994).

Adequate precautions must be taken to ensure safety when mounting, wiring and piping

equipment of flameproof construction. For safety reasons, regulations are imposed on

the maintenance and repair of such equipment. Before doing any such work, ALWAYS

be sure to read “Installation and Operating Precautions for Flameproof Explosion-

Protected Instruments” at the end of this manual.

2.9 Installation Precautions for CENELEC (KEMA)

Intrinsic Safety

• Electrical Data

In type of explosion protection intrinsic safety EEx ia IIC only for connection to a

certified intrinsically safe circuit with following maximum values:

Umax = 30V

Imax = 165mA

Pmax = 0.9W

Effective internal capacitance Ci = 6nF

Effective internal inductance Li = 730µH

• Installation

All wiring shall comply with local installation requirements. (Refer to the installation

diagram)

Installation Diagram

* Integral Type

Hazardous Location Non Hazardous Location

Flowmeter

(UYF200-A)

SUPPLY

–

PULSE

–

Safety

Barrier 1

* Note 1

–

Safety

Barrier 2

* Note 1

2-6

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* Remote Type

Hazardous Location Non Hazardous Location

Flowmeter

Converter

(UYFA21)

UYF021

Signal Cable

Flowmeter

Detector

(UYF200-N)

SUPPLY

–

PULSE

–

Safety

Barrier 1

* Note 1

–

Safety

Barrier 2

* Note 1

Note 1: In any safety barrier used output current must be limited by a resistor ‘R’ such that Io=Uo/R

Note 2: The instrument modification or parts replacement by other than authorized representative of

Yokogawa Electric Corporation is prohibited and will void KEMA Intrinsically safe Certification.

2.10 Installation Precautions for CENELEC (KEMA)

Explosionproof

Suitable heat-resisting cables (heat-resisting over 90˚C) shall be used for the ULTRA

YEWFLO Model UYF200 Serise Ultrasonic Voltex Flowmeter when the ambient

temperature exceeds +70˚C and/or the process temperature exceeds 135˚C.

The cable entry devices shall be certified in type of protection flameproof enclosure “d”

and suitable for the conditions of use and correctly installed.

3-1

IM 1F5B2-01E

3. COMPONENTS OF ULTRA YEWFLO

■The integral type of ultrasonic vortex flowmeter (wafer, flange type)

Figure 3.1 Components of ULTRA YEWFLO

Converter case

Converter covers

Bracket

Sensor assembly

Sensor-mounting plate

Bodies

Wafer type

Flange type

■The remote type of ultrasonic vortex flowmeter (Converter, Detector)

Converter case

Terminal box cover

Bracket

Sensor assembly

Terminal box

Bodies

Sensor-mounting plate

Converter covers

4-1

IM 1F5B2-01E

4. MOUNTING

Before mounting ULTRA YEWFLO, see Section 2.4, “Precautions Regarding Installa-

tion Location.” For the environmental conditions of the installation location, see Section

9.1, “Standard Specifications.”

4.1 Piping Precautions

IMPORTANT

• Be sure to observe the precautions in this section. Failure to observe these precau-

tions will result in an adverse effect to your flowrate measurement.

IMPORTANT

• Avoid mounting ULTRA YEWFLO on a pipeline where:

• the process fluid is mixed with bubbles of gas.

• the process fluid is mixed with an excessive amount of slurry or foreign matter that

has accumulated on the inner walls.

•a highly pulsating flow or pressure is present.

■ Valve Mounting and Straight Lengths of a Pipeline

■ Valve position and straight pipe length:

Install the valve on the downstream side of the flowmeter. The upstream straight pipe

length dependent on the element located on the upstream such as reducer/expander,

bent and etc., refer to description as below. Keep 5D or more for downstream straight

pipe length.

YEWFLO

5D or more

Flow

Valve

Refer to each

element below for

straight pipe run.

In case the valve has to be installed on the upstream of the flowmeter, ensure the

upstream straight pipe length to be 20D or more (for /HAC version is 30D), and the

downstream straight pipe length be 5D or more.

Flow

YEWFLO

Valve

5D or more

20D or more

(/HAC version 30D)

Figure 4.1-1 Valve Mounting and Straight Lengths of Pipe

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■ Connection of Reducing and Expanding Pipes and Their Straight Lengths

■ Reducer or expander pipe:

Ensure the upstream straight pipe length be 5D or more (for /HAC version is 10D),

and the downstream straight pipe length to be 5D or more for per reducer pipe.

Ensure the upstream straight pipe length be 10D or more (for /HAC version is 20D),

and the downstream straight pipe length be 5D or more for per expander pipe.

Flow

YEWFLO

5D or more

Reducer

5D or more

(/HAC version 10D)

Flow

YEWFLO

5D or more

Expander

10D or more

(/HAC version 20D)

Figure 4.1-2 Connection of Reducing and Expanding Pipes and Their Straight

Lengths

■ Bent pipe and straight pipe length:

Ensure the upstream straight pipe length to be 10D or more, and the downstream straight

pipe length be 5D or more for per bent pipe.

Flow

10D × N or more 5D or more

YEWFLO

Figure 4.1-3 Connection of Bent Pipe and Straight Lengths of Pipe

■ In case of pulsating pressure existing:

•When pulsating pressure caused by a pump exist, install the valve on the upstream of

the flowmeter.

Installation Example

Pump

Valve

Figure 4.1-4a Piping Where Pulsating Pressure Caused by a Pump

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IM 1F5B2-01E

4. MOUNTING

• When pulsating pressure caused by a T-type piping exist, install the valve on the

upstream of the flowmeter.

Example: As shown in the figure below, when the valve V1 is turned off, the fluid

flow through B, as to meter A the flow is zero. But due to the pulsating

pressure is detected, the meterís zero point become fluctuating. To avoid

this, change the valve V1 location to V1’.

V1V1'

Valve (Off)

Flow

Relocating

Figure 4.1-4b Piping where Paulsating Pressure Caused by a T-type Piping

■ Piping That Prevents Cavitation from Occurring

IMPORTANT

• Avoid mounting ULTRA YEWFLO with its downstream side open to the atmosphere.

Otherwise, there will be an increased risk of cavitation.

■ The case of downstream open to the air:

If downstream open to the air, the cavitation possibly occurs. Avoid this kind use.

If such piping cannot avoid, up and down the downstream pipe as shown the figure

below, or, install a valve on the downstream side.

Installation Example

Pump

Tank

Figure 4.1-5 Piping when downstream open to the air

■ Joint Pipes

For joint pipes, use pipes with an inner diameter greater than that of ULTRA YEWFLO

(use pipes with a schedule number no larger than 80 for joint pipes with a nominal inner

diameter ranging from 25 mm to 100 mm).

IMPORTANT

• Exercise care to prevent the gaskets inserted between ULTRA YEWFLO and the joint

pipes from protruding into the flow path.

4-4

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■ Waterproof Construction

CAUTION

• The waterproof construction of ULTRA YEWFLO is designed to comply with the JIS

C0920 standard for water-tight equipment (compatible with IEC IP67 or NEMA4X)

which does not allow it to be immersed in water during use.

■ Mounting Position

ULTRA YEWFLO can be mounted vertically, horizontally or in any other position. For

a vertical pipe, mount ULTRA YEWFLO so that the process fluid is flowing upward,

always keeping ULTRA YEWFLO filled with the fluid.

IMPORTANT

•Mount ULTRA YEWFLO in such a manner that the pipe is constantly filled with the

running process fluid (see Figure 4.1-8).

■ Flushing of the Pipeline (Cleaning)

If scale or sludge (fur and/or dirt) is likely to be present inside the piping after the

installation of a new line or the repair of an existing line, flush the line before operation.

Figure 4.1-6 Flushing of Pipeline

■ Piping That Prevents Bubbles of Gas from Becoming Trapped

IMPORTANT

Avoid the application where the gas bubbles may be contained in the fluid to be

metered

When the flow contains bubbles, it is difficult to carry out metering. Therefore, avoid

such application. For example: when disburden fluid from tank car, it is possible to

produce the bubbles by the phenomenon occurred when the liquid level decreases.

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4. MOUNTING

IMPORTANT

• Starting the flow of any gas-liquid two-phase fluid in the pipeline will impede your

measurement. Care must be taken to avoid flowing any fluid containing gas bubbles.

Gas bubbles can occur, however, for a number of reasons. Pipe ULTRA YEWFLO

so that no such bubbles remain inside ULTRA YEWFLO.

• During such times as the startup of plant operation, a process fluid may take the form

of a gas-liquid two-phase stream temporarily at the start of flow. Note that, in that

case, the indicator may overshoot or fail to give readings.

Figure 4.1-7 Example of Piping That Prevents Bubbles of Gas from Becoming

Trapped

■ Piping That Keeps ULTRA YEWFLO Filled with Process Fluid

IMPORTANT

• If not filled with the process fluid, ULTRA YEWFLO will fail to operate properly

because it faces the difficulty of transmitting and receiving ultrasonic signals. Ob-

serve the following precaution when piping ULTRA YEWFLO.

Allow the process fluid to flow upward through the pipeline. This strategy keeps

ULTRA YEWFLO constantly filled with fluid. Should it be unavoidable for the fluid to

flow downward, raise the downstream side of the pipeline to the height shown in Figure

4.1-8. This strategy will also ensure that ULTRA YEWFLO is always filled with

process fluid.

4-6

IM 1F5B2-01E

Figure 4.1-8 Example of Piping That Keeps ULTRA YEWFLO Filled with

Process Fluid

4-7

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4. MOUNTING

4.2 Mounting ULTRA YEWFLO

When mounting ULTRA YEWFLO, position it in such a manner that the direction in

which the process fluid is flowing matches the direction of flow indicated on ULTRA

YEWFLO’s body. For information on how to rotate the indicator/totalizer component,

see Section 4.3.

4.2.1 Mounting a Wafer Type of ULTRA YEWFLO

•When mounting a wafer type of ULTRA YEWFLO in a pipeline, make sure that

ULTRA YEWFLO is lined up with the pipeline along its central axis.

• Stud bolts and nuts (material: SUS304) for mounting are supplied with ULTRA

YEWFLO upon request (specify suffix code “/BLT” for this optional feature).

• If you are planning to procure stud bolts by yourself, refer to Table 4.2 that summa-

rizes their required outer diameters as classified by the standards for flanges.

• It is always the user’s responsibility to procure gaskets for flowmeter mounting (see

Figure 4.2-1). (In order to prevent gaskets from protruding into the flow path, use

gaskets with pre-cut bolt holes whenever possible.)

Table 4.2 Mounting Studs for ULTRA YEWFLO’s Wafer Type

lanimoN

retemaiD

fosgnitaR

segnalF

tloBdutS

retemaiDretuO

)mm(

)mm(htgneL

mm52

).ni1(

K02,K01SIJ

051ISNA

003ISNA

7.21

9.51

061

551

061

mm04

).ni2/11(

K02,K01SIJ

051ISNA

003ISNA

7.21

1.91

061

551

071

mm05

).ni2(

K02,K01SIJ

051ISNA

003ISNA

9.51

002

mm08

).ni3(

K01SIJ

K02SIJ

051ISNA

003ISNA

9.51

1.91

022

042

mm001

).ni4(

K01SIJ

K02SIJ

051ISNA

003ISNA

9.51

1.91

022

042

stlobdutsehtfoshtgneletamixorppaehtera'htgneL'rednusrebmunehT•

ehtybdeificepssaawagokoYybdeilppus TLB .edocxiffus

riehtecnisnekatebtsumerac,flesruoyybstlobdutsgnirucorpnehW•

steksagdnastunehtfossenkcihtehtnognidnepedseiravhtgnelderiuqer

.desu

4-8

IM 1F5B2-01E

Figure 4.2-1 Gasket with Pre-cut Bolt Holes (for Four-hole Flanges)

Flange of joint pipe

Joint pipe

Figure 4.2-2 Installation of Gaskets

IMPORTANT

• Use gaskets whose inner diameter is greater than those of ULTRA YEWFLO and the

joint pipe. Exercise extreme care to prevent the gaskets from protruding into the flow

path.

■ The procedure for mounting a wafer type of ULTRA YEWFLO is the same no matter which type of

flange you use.

Horizontal Mounting

<1> Thread two collars each through each of the lower two bolts as shown in fig 4.2-

<2> Evenly fasten the nuts and bolts, tightening both edges of ULTRA YEWFLO’s

brim onto each pair of collars.

<3> Make sure the process fluid is not leaking.

4-9

IM 1F5B2-01E

4. MOUNTING

Direction of flow

Nut

Collar

Gasket

Flange

Stud bolt

Figure 4.2-3 Horizontal Mounting

Vertical Mounting

<1> Thread one collars each through each of the lower two bolts as shown in fig 4.2-

<2> Make sure, at that point, that both edges of ULTRA YEWFLO’s brim are in

proper contact with each pair of collars.

<3> Evenly fasten the bolts and nuts, tightening the edges onto the collars.

<4> Make sure the process fluid is not leaking.

Direction of flow

Figure 4.2-4 Vertical Mounting

4-10

IM 1F5B2-01E

IMPORTANT

• In vertical mounting, ALWAYS make sure ULTRA YEWFLO is mounted with the

wiring port facing downward, as shown in Figure 4.2-3, to prevent against the ingress

of rainwater, etc.

4.2.2 Installing a Flange Type of ULTRA YEWFLO

• Using stud bolts, nuts and gaskets, install ULTRA YEWFLO as shown in Figures 4.2-

5 and 4.2-6.

• It is always the user’s responsibility to procure gaskets for flowmeter mounting (see

Figure 4.2-1). (In order to prevent gaskets from protruding into the flow path, use

gaskets with pre-cut bolt holes whenever possible.)

IMPORTANT

• Use gaskets whose inner diameter is greater than those of ULTRA YEWFLO and the

joint pipe. Exercise extreme care to prevent the gaskets from protruding into the flow

path.

Direction

of flow

Nut

Bolt

Gasket

Figure 4.2-5 Horizontal Mounting

IMPORTANT

• In vertical mounting, ALWAYS make sure ULTRA YEWFLO is mounted with the

wiring port facing downward, as shown in Figure 4.2-3, to prevent against the ingress

of rainwater, etc.

4-11

IM 1F5B2-01E

4. MOUNTING

Figure 4.2-6 Vertical Mounting

Parts that the user should procure when installing ULTRA YEWFLO (either a wafer or

flange type):

Nuts and bolts Gasket with pre-cut bolt holes

4-12

IM 1F5B2-01E

4.3 Mounting remote type converter

For the remote type, using UYF021 signal cable to connect the converter and remote

type flowmeter.

The maximum signal cable length is 65ft (20m).

The converter is mounted on a 2-inch (60.5mm outer dia.) stanchion or horizontal pipe.

Figure 4.3 Mounting remote type converter

4.4 Repositioning the Indicator/Totalizer Component

• The indicator/totalizer component of ULTRA YEWFLO can be turned 90˚ either

clockwise or counterclockwise. For example, you can install ULTRA YEWFLO on a

vertical pipe, as shown in Figure 4.3, by removing the component and then reposition-

ing the joint pin (see Subsection 8.3.1).

Position at shipment

Position for vertical mounting

Figure 4.4 Repositioning of the Indicator/Totalizer Component

U-Bolt

(Only when specifying

it is attached)

Horizontal pipe mounting

2-inch ( 60.5mmouter dia.) pipe

Stanchion (vertical pipe)mounting

Mounting bracket

(Only when specifying

it is attached)

Nut

(Only when

specifying it is

attached)

IMPORTANT

4-13

IM 1F5B2-01E

4. MOUNTING

4.5 Swiveling the Indicator/Totalizer Component

The indicator/totalizer component can be swiveled around the neck in increments of 90°.

To change the orientation of the component, follow the procedure described below.

See Note.

See step 1.

See step 2.

Figure 4.5 Swiveling the Indicator/Totalizer

Component

(1)Loosen the setscrew at the neck of the

converter case for just one turn.

(2)Remove the four screws that join the

case and bracket and, preventing the

case from lifting off the bracket, swivel

the indicator/totalizer component so it

faces the desired direction.

(3)Reverse the operation noted in step 2

above to replace the component.

Note: To swivel the component 180°, remove

the two screws that join the body and

bracket. This strategy makes your work

easier.

CAUTION

■When swiveling the indicator/totalizer component or, in other words, the

converter case, exercise care to avoid damaging the leadwires by pulling

up on them.

■Do not swivel the converter case more than 180° in either direction.

4-14

IM 1F5B2-01E

4.6 Insulating the Piping

• When insulating the piping, exercise care to avoid covering the bracket with the

insulation to prevent heat from getting into the converter.

IMPORTANT

• Do not cover the bracket.

Figure 4.6 Insulating the Piping

5-1

IM 1F5B2-01E

5. WIRING

IMPORTANT

■ When wiring ULTRA YEWFLO, avoid locating it near such sources of noise as

transformers, motors or electromotive power supplies with large current capacities.

■ Remove the terminal cover and dust-prevention plug on the wiring port before wiring

ULTRA YEWFLO.

■ ALWAYS waterproof all threaded parts. (A silicon-resin, non-hardening sealing

material is recommended for the waterproof treatment.)

■ To protect against noise, do not allow the signal cable and electromotive cables to

run through the same duct.

■ Explosion-proof models of ULTRA YEWFLO must be wired in compliance with

applicable regulations to ensure explosion-proof performance.

Refer to “Installation and Operating Precautions for Flameproof Instruments” at the

end of this manual to wire ULTRA YEWFLO correctly.

5.1 Selecting the Cable

Observe the following precautions when choosing cables for use with the transmission

loop line.

■ Use a twisted cable equal to or better than 600V grade polyvinyl chloride insulated

wiring (JIS C3307).

■ When wiring ULTRA YEWFLO in an area susceptible to noise, use a shielded cable.

If ULTRA YEWFLO will be used in a simultaneous analog-pulse output mode,

separately shielded two-wire cables may become necessary. (See Section 5.5 for

more information.)

■ When wiring ULTRA YEWFLO in an area where the ambient temperature is

comparatively high or low, use a cable suited for the place of use.

■ When using ULTRA YEWFLO in an area where a harmful gas, liquid, oil and/or

solvent is present, use a cable resistant to these substances.

■ Crimp-on terminals (for 4-mm screws) with insulated sleeves are recommended as

the cable-end configuration.

CAUTION

For the remote type, using UYF021 signal cable to connect the converter and remote

type flowmeter.

5-2

IM 1F5B2-01E

5.2 Connecting Field Mounting Indicator (applies to ana-

log output only)

■ When using such field mounting indicator, wire them as shown in Figure 5.2.

Yokogawa Electric’s Model 4915 (standard) or 4914 (flameproof) field mounting

indicator is recommended for this use.

Figure 5.2-1 Connection of Field Mounting Indicator

Power

supply

Power

supply

Connection

box

ULTRA YEWFLO

Power supply terminal

Model 4915 or 4914

PULSESUPPLY

• Integral type

Power

supply

Power

supply

Vortex flowmeter

Converter

: Connecting 2

PULSE

SUPPLY

Connection

box

Connection

box

Terminal

Electrode

: Connecting 1

: Connecting 2

Figure 5.2-2 Connection of Field Mounting Indicator

• Remote type

5-3

IM 1F5B2-01E

5. WIRING

5.3 Wiring

CAUTION

For JIS Flameproof type:

• Stringent restrictions apply to the wiring materials and methods of flameproof

instruments, including their peripheral devices. Before doing any wiring, ALWAYS

be sure to read “Installation and Operating Precautions for Flameproof Explosion-

Protected Instruments” at the end of this manual.

•Do not open the cover for two minutes after turn-off the power supply.

• In case of the metal conduit wiring, the temperature limit for insulated wire must be

over 75˚C.

■ Follow the procedure below to wire ULTRA YEWFLO.

• For reasons of waterproofing or protection of cables against damage, the use of cable

conduits and ducts is recommended for wiring. (See Figure 5.3-1.)

• To open the cover of a flameproof model of ULTRA YEWFLO, turn the lock screw

clockwise. When you have closed the cover after wiring, ALWAYS turn the lock

screw counterclockwise so the cover is securely fastened.

•Use Yokogawa Electric’s flameproof packings adaptor or conduits for external wiring

of a flameproof model of ULTRA YEWFLO.

Connection box

Thick-wall steel conduit

Tee

Drainage fitting

Flexible

conduit

Figure 5.3-1 Example of Wiring Using Conduits (Standard Model of ULTRA

YEWFLO)

5-4

IM 1F5B2-01E

■ Follow the procedure below to attach a flameproof packing adapter (optional) (see Figure 5.3-2).

<1> Turn the lock screw clockwise to remove the cover on the terminal box.

<2> Measure the outer diameters of the cable being used, in two different directions, to

an accuracy of 0.1 mm.

<3> Determine the average of the outer diameters in two directions. Choose the

packing whose inner diameter is closest to the average from the three supplied

packings (see Table 5.3).

<4> Screw the adapter’s main assembly into the wiring port of ULTRA YEWFLO and

fasten the assembly with the locknut. (Be sure to insert the O-ring.)

<5> Insert the pressure nut, union coupling, plate packing, washer, rubber packing and

washer, in this order, into the cable. Connect each wire of the cable to their

respective terminals through the main assembly of the flameproof packing adapter.

<6> Fasten the pressure nut to fix the adapter. For a proper tightening torque, apply

another two or two-and-a-half turns to the pressure nut at a point where the rubber

packing begins to compress.

<7> Fasten the stop screw on the pressure nut.

<8> Reinstall the cover on the terminal box. Turn the lock screw counterclockwise to

fasten the cover.

Lock screw

Cable

Hexagon-socket

stop screw

Pressure

nut

Plate

packing

Washers

Union coupling

Rubber packing

Locknut

O-ring

Figure 5.3-2 Attachment of Flameproof Packing Adapter

Integral type

Remote type

detector

Remote type

detector

5-5

IM 1F5B2-01E

5. WIRING

IMPORTANT

■ALWAYS waterproof all threaded parts. (A silicon-resin, non-hardening sealing

material is recommended for the waterproof treatment.)

Table 5.3 Types of Packings and Applicable Outer Diameters of Cables

edoCxiffuS

daerhTforetemaiD

troPgniriWno

elbacilppAforetemaiDretuO

)mm(elbaC

noitacifitnedI

gnikraM

rebmuNtraP

5GP2/1G

9ot5.8

01ot1.9

11ot1.01

9 φ

01 φ

11 φ

DA1069G

5.4 Grounding

■ For an analog output application, connect a grounding wire from ULTRA YEWFLO

to the ground.

■ For a pulse output application, connect a grounding wire from ULTRA YEWFLO to

the ground. Also ground the shielded cable that connects ULTRA YEWFLO to the

pulse receiver.

■ Use the Class 3 Grounding method (grounding resistance of no greater than 100 Ω).

■ Use a 600V grade polyvinyl chloride insulated wiring for grounding.

5-6

IM 1F5B2-01E

5.5 Signal cable end finish procedure

For finishing signal cable end, following the procedure as below:

IMPORT ANT

The length of signal cable must be less than 20m.

(1) Remove the outer jacket, outer shield and inner

jacket as shown in the figure below.

Inner shield

Outer jacket

Inner

jacket

Outer shield

White

Red

(A)

(G)

(B)

(C)

Blue tubing

Black tubing

(A)

(G)

(B)

(C)

Heat shrinkable tubing

Tip

Label

Heat shrinkable tubing

Unit : mm

(2) Remove inner shield, intertwine two drain

wires, and cut each tip.

(3) Remove the wire insulation and twist each wire

as shown below.

(4) Insert insulation tubing over B and G until it

stops inside the shield. Cut the tubing off

leaving only 0.2 inch (5mm) of the inner shield

exposed. Remove 0.2 inch of insulation from

the tips of the two wires.

(5) Insert the heat shrinkable tubing as shown

below.

(6) As shown in the figure below, install the tip on

each wire and label of the sign which corre-

sponds to the each line.

(7) Heat all of shrinkable tube with a heat blower

or heat gun, and then shrink them.

5-7

IM 1F5B2-01E

5. WIRING

5.6 Power Supply Voltage and Load Resistance

Analog Output

■ ULTRA YEWFLO uses two-wire transmission and, therefore, the cable is used both

as the power supply line and as a signal line. A DC power supply is needed for the

transmission loop line. (The distributors listed in Table 5.6 are available from

Yokogawa Electric. Contact the manufacturer as necessary.)

■ The maximum communicable distance over a transmission cable is 2 km when a

CEV cable is used.

■ Communication via the amplifier board is always possible irrespective of the wiring

conditions.

Table 5.6 Distributors

ledoM

foepyT

noitalusnI

otylppuSrewoP

rotubirtsiD

forebmuNelbatcennoC

s'OLFWEYARTLU

foecnatsiseRmumixaM

eriWgnitcudnoC

011-TBDS

012-TBDS

041-SBDS

detalusni-pooL

detalusni-O/I

detalusni-pooL

derewop-CD/CA

053 Ω

• When configuring a loop, make sure the load resistances of both instruments, such as

a distributor, and conducting wires, which are to be installed in the loop, fall within

the shaded area of Figure 5.6-1.

• The load resistance should preferably be connected to the negative-polarity terminal

of the power supply if no distributors are used. Figure 5.6-2 shows an example of

connection between ULTRA YEWFLO and a distributor.

E–10.5

0.0236

250

600

10.5 16.4 24.7

30 42

Power Supply Voltage E (V)

Communicable

range

Load resistance R (Ω)

Note: In the case of CENELEC intrinsic safety, the power supply voltage shold be under 30 VDC.

Figure 5.6-1 Relationship Between Power Supply Voltage and Load Resistance

(Analog Output)

5-8

IM 1F5B2-01E

SDBT or

SDBS distributor

1- to 5V DC

input

To recorder or

indicating meter

To power

supply

ULTRA YEWFLO

Power supply terminal

PULSESUPPLY

Figure 5.6-2 Wiring of ULTRA YEWFLO (Analog Output)

5.7 Pulse Output

■ ULTRA YEWFLO provides a pulse output through transistor contacts using three-

wire transmission. The contacts are rated at a maximum of 30 V DC and 120 mA

DC.

■ The low level is 0-2 V.

■ The range of the pull-up resistance is as noted below.

■ The pulse output is connected to such devices as an electronic counter. See Figure

5.6-3.

■ No communication is possible over a transmission line.

■ Communication via the amplifier board is always possible irrespective of the wiring

conditions.

ULTRA YEWFLO

Power supply terminal

Electronic

counter

R (1 kΩ Typ)

Three-wire shielded cable

(resistance of conducting wire: 50 Ω maximum)

PULSESUPPLY

Figure 5.6-3 Wiring of ULTRA YEWFLO (Pulse Output)

• Range of Pull-up Resistance

The range of the pull-up resistance for pulse output is restricted for reasons of the

rated current and output frequency, as shown below:

E (V)

ՅՅR (kΩ)

120

0.1

C (µF) × f (kHz)

where

E=pull up supply voltage

C=cable capacitance

f=frequency of pulse output

5-9

IM 1F5B2-01E

5. WIRING

IMPORTANT

Pull-up Resistance is necessary for pulse output. ( When resistance is low, amplifier will

be wrong.)

Pull-up Resistance is basically 1kΩ, 1W. Depend on the cable length and pulse output

frequency, transmission may be disrupted. Determine the resistance value by equation

(1), and electric power of resistance by equation (2).

Take care of hot resistance.

5-8 Simultaneous Analog-Pulse Output

■ When using ULTRA YEWFLO in the simultaneous analog-pulse output mode, the

communicable distance of the transmission line is restricted depending on the wiring

method. Figure 5.6-4 illustrates three examples of flowmeter installation for this

output mode.

■ Communication via the amplifier board is always possible irrespective of the wiring

conditions.

R(kΩ) =

0.1

(1)

C(µF) X f (kHz)

(*1)

Over 200Ω is necessary for R.

C : Capacitance of the cable f : Pulse output frequency

In case of (*1)CEV cable (2SQ),

0.1µF/km

P (W) =

(2)

E: Power supply voltage

P : Electricity of resistance

CAUTION

5-10

IM 1F5B2-01E

• First of Three Examples – Communication is possible (up to a distance of 2 km when a CEV cable is used).

–

Shielded cable

Distributor

250Ω

Electronic counter

E (10.5-30 V DC)*1

Counting input

Common

24V DC

*1: This su

volta

e re

uires a

ower source with a maximum out

ut current of no less than E/R.

SUPPLY

PULSE

• Second of Three Examples – Communication is possible (up to a distance of 200 m when the pull-up

resistance is 1 kΩ).

–

Shielded cable

250Ω

Electronic counter

E (16.4-30 V DC)*2

Counting input

Common

Recorder or other

instrument

*2: This supply voltage requires a power source with a maximum output current of no less than E/R + 25 mA.

The inductance of the

ower out

ut should less than 1/1000 of Pull-u

resistance

(

)

SUPPLY

PULSE

• Third of Three Examples – No communication is possible (except when there is no process fluid flowing).

–

250Ω

Electronic counter

E (16.4-30 V DC)*2

Counting input

Common

Recorder or other

instrument

*2: This supply voltage requires a power source with a maximum output current of no less than E/R + 25 mA.

SUPPLY

PULSE

Figure 5.6-4 Wiring of ULTRA YEWFLO (Simultaneous Analog-Pulse Output)

IMPORTANT

• For the shielded cables in the first and second examples of flowmeter installation, use

two-wire separately shielded cables.

6-1

IM 1F5B2-01E

6. PREPARING FOR OPERATION

6.1 Checking the Flowrate Range

■ If your ULTRA YEWFLO is new, it is already calibrated to the specified range for

the flow rate.

■ When changing the range, determine the required range for the flow rate using the

following procedure.

Table 6.1 Measuring Ranges

Measurable Range of Flow Velocity (range including flow velocities with non-

guaranteed accuracy)

yticoleVwolFmuminiMyticoleVwolFmumixaM

ARTLU,s/m3.0(s/m2.0,regralsirevehcihW

ehtro)mm51siretemaidlanimons'OLFWEY

000,5rebmunsdlonyeRybnevigyticolevwolf

s/m6

Range of Flow Velocity with Guaranteed Accuracy (range for accuracy within

±1.0%)

yticoleVwolFmuminiMyticoleVwolFmumixaM

ehtfi,s/m3.0(s/m2.0,regralsirevehcihW

,51siretemaidlanimons'OLFWEYARTLU

sdlonyeRybnevigyticolevwolfehtro)mm52

000,02rebmun

s/m6

Range of Flow Velocity with Guaranteed Accuracy (range for accuracy within

±0.5%)–applies only to models with suffix code /HAC, but except for size 25mm,

150mm and 200mm.

yticoleVwolFmuminiMyticoleVwolFmumixaM

yticolevwolfehtros/m2.0,regralsirevehcihW

sadetaluclacrebmunsdlonyeRehtybnevig

retemaidlanimon

000,1

wolfehtros/m6,rellamssirevehcihW

rebmunsdlonyeRehtybnevigyticolev

sadetaluclac retemaidlanimon

000,4

nahtiwylpmoc1.6elbaTninwohssegnarehtnidedulcnitonseiticolevwolF:ETON

fognitarycarucca ± .%0.1

■ Equation for determining the Reynolds number:

Re=

354 × 10

× Qf

ν × D

■ Equation for determining the kinematic viscosity:

ν=

ρ f

× 10

6-2

IM 1F5B2-01E

■ Equation for determining the volumetric flowrate (Qf) of ULTRA YEWFLO under operating conditions:

Qf=

υ × D

354

where

Re = Reynolds number (dimensionless)

Qf = volumetric flow rate under operating conditions (m

/h)

D = inner diameter of ULTRA YEWFLO (mm)

ν = kinematic viscosity under operating conditions (cSt)

ρf = density under operating conditions (kg/m

)

µ = viscosity under operating conditions (cP)

υ = flow velocity (m/s)

• If the obtained flow velocity falls within any of the ranges shown in Table 6.1, you

can measure the flowrate properly.

• Using the graph in Figure 6.1, you can determine flow velocities for cases where the

Reynolds number is 5,000. Multiplying the given value by 4 gives you the flow

velocity for a Reynolds number of 20,000.

lanimoN

retemaiD

)mm(retemaiDrennI

1 mm51 5 8.21

mm524.32

mm046.63

mm055.74

mm080.17

mm0018.39

mm0518.831

mm0026.581

Kinematic Viscosity ν (cSt)

0.5

0.3

0.2

12351020 30 50 100 200 300

0.5

v = 5 ×

D:YEWFLO inner diameter (mm)

25 mm

50 mm

80 mm

100 mm

200 mm

150 mm

Minimum Flow Velocity v (ms)

15 mm

Figure 6.1 Relationship Between Minimum Flow Velocity and Kinematic

Viscosity (curves for a Reynolds number of 5,000)

6-3

IM 1F5B2-01E

6. PREPARING FOR OPERATION

6.2 Pressure Loss and Cavitation

When changing the range, ALWAYS make sure the line’s back pressure level will not

lead to adverse effects due to pressure loss or cause cavitation.

■ Pressure Loss

• The pressure loss is calculated by

∆P=108 × 10

-5

× ρf • υ

........................ (1)

∆P=135 × ρf •

..................................... (2)

where

∆P = pressure loss (kPa)

Qf = volumetric flow rate under operating conditions (m

/h)

D = inner diameter of ULTRA YEWFLO (mm)

υ = flow velocity (m/s)

ρf = density under operating conditions (kg/m

)

■ Cavitation (Minimum Back Pressure of the Line)

IMPORTANT

Cavitation may occur in fluid measurements if the line pressure is too low and the flow

velocity is too high, resulting in failure to measure the correct flow rate. Before

measurement, ALWAYS make sure the line’s back pressure level will not cause

cavitation.

No cavitation occurs if the minimum back pressure of the line at the maximum flowrate

is sufficiently low compared with the actual line pressure.

• The minimum line pressure is calculated by

P=3.8 × ∆P + 1.3 × Po ......................... (3)

where

P = line pressure at a point two to seven times the nominal

diameter downstream from the ULTRA YEWFLO (kPa

abs)

∆P = pressure loss (kPa)

Po = liquid’s saturation vapor pressure under operating

conditions (kPa abs)

6.3 Zero Adjustment

No zero adjustment is necessary since the zero point does not shift.

6.4 Resetting totalized Value

•On the Brain Terminal (BT200), choose EXECUTE from the menu in parameter E10

(TOTAL RESET).

•Or, press the RESET switch located on the indicator/totalizer component.

6-4

IM 1F5B2-01E

6.5 Action Against Power Failure

• In the case of a power failure, the totalized data value is protected by the EEPROM.

ULTRA YEWFLO cannot operate during a power failure, however, resulting in an

interruption in totalization. It resumes totalization upon recovery from the power

failure (restarts totalization, beginning with the value given immediately before the

power failure) and automatically restores normal operation.

•No backup batteries are necessary for the EEPROM.

6.6 Precautions During Startup

• Because of effects due to external noise, ULTRA YEWFLO may not indicate 0%

when the flowrate is zero, giving an output greater than 0%. If this occurs, first make

sure ULTRA YEWFLO is filled with the process fluid. Then, make a TLA adjust-

ment according to the instructions in Subsection 8.2.3.

If the pipeline is empty during startup, ULTRA YEWFLO may continue to give a 0%

output or remain unstable until it fills with the process fluid.

IMPORTANT

•Whenever possible, pipe ULTRA YEWFLO while exercising care to prevent bubbles

of gas from mixing with the process fluid. (See Section 4.1, “Piping Precautions.”)

7-1

IM 1F5B2-01E

7. WORKING WITH THE BT200 BRAIN TERMINAL

7. WORKING WITH THE BT200 BRAIN

TERMINAL

ULTRA YEWFLO is equipped with a communication function called “BRAIN.”

ULTRA YEWFLO thus communicates with a BT200 BRAIN Terminal, enabling you to

change the range or set the tag number from a remote location. This chapter explains

how to set or change parameters using a BT200 terminal. For more information on a

BT200 terminal, see the BT200 BRAIN Terminal instruction manual (IM 1C0A11-01E).

7.1 Connection of a BT200 Terminal and Notes on Use

7.1.1 Connection of a BT200 Terminal

■ A BT200 terminal can be linked with ULTRA YEWFLO through the transmission

line in different ways. Connect the terminal to the connecting hooks in a terminal

box or to the relay terminals on the transmission line, using BT200 communication

cable with IC clip, as shown in Figure 7.1-1.

■ You can also communicate with ULTRA YEWFLO via the amplifier board. To do

this, connect the BT200 terminal across the HHT and COM terminals.

ULTRA YEWFLO

(converter section)

Relay

terminals

Instrument room

Terminal board

Distributor

(power supply)

Figure 7.1-1 Connection of BT200

7-2

IM 1F5B2-01E

7.1.2 Notes on Use

CAUTION

Connect the terminal to the connecting hooks in a terminal box or to the relay terminals

on the transmission line, using BT200 communication cable with IC lip, as shown in

Figure 7.1-1.

• All your settings of parameters will be canceled if you turn ULTRA YEWFLO off

less than 30 seconds after the parameter setup. Keep ULTRA YEWFLO turned on

for at least 30 seconds after setting up parameters.

NOTE

<1> With Auto Power-off, the BT200 automatically turns off if it senses no access to

the keys for more than five minutes. This feature does not work, however, if the

parameters described in item 2 below are on the display.

<2> Parameters “A10: FLOW RATE (%),” “A20: FLOW RATE” and “A30: TOTAL,”

when on display, are updated with new data every five seconds.

<3> Use the UPLOAD or DOWNLOAD command when copying the parameters of

one ULTRA YEWFLO to another. Parameters that can be copied are all the items

in the B and C menus shown later in Section 7.4. (Except for B10: TAG NO and

B26: K-FACTOR)

7-3

IM 1F5B2-01E

7. WORKING WITH THE BT200 BRAIN TERMINAL

7.2 Working with the BT200

7.2.1 Layout of Keys

■ Figure 7.2-1 shows the layout of keys on the BT200.

21-line LCD display with 8

characters on each line

Cursor keys

• Select a menu item or parameter.

• Move the cursor.

• Browse pages.

POWER-ON/OFF key

Function keys

• Show commands at

the bottom of the display.

• Execute instructions as

dictated by the on-screen commands.

ENTER key

• Enters the selected menu.

• Sets data in the instrument to communicate with.

• Executes the functions of the BT200.

Alphanumeric keys

• Type in numerals.

• Type in letters in combination with the SHIFT key.

SHIFT key

Figure 7.2-1 Layout of Keys on the BT200

Screen titles

Message data items (a maximum of

six items is shown at one time)

Commands assigned to function keys

Parameters (a maximum of

three parameters is shown at

one time)

Parameter Screen BATTERY

A: DISPLAY

B: SET 1

C: SET 2

D: ADJUST

E: CONTROL

F: TEST

Menu Screen

Message

Parameter Screen

Parameter

A10 : FLOW RATE (%)

100.0%

A20 : FLOW RATE

10 m

A30 : TOTAL

100 m

HOME

SET

ADJ ESC

PARM

HOME

SET

ADJ

7-4

IM 1F5B2-01E

B01 : TAG NO.

REIDAI

Alphanumeric Keys Used to Type in Data

Numeric key

In this mode, the F2 key

works as a key for shifting

between upper- and

lower-case letters.

Shift key for letters in the

upper-left corners of the keys

Press either of these keys each time you want to type

in a letter.

Function Keys and Shifting Between Upper- and Lower-case Letters

Shift key for letters in the upper-

right corners of the keys

Function keys

Each press of the F2 key toggles

between upper- and lower-case

letters.

Each function key is paired with

the command immediately

above the key.

Arrow Keys and ENTER Key

Power-on and -off

Used to select and enter a

data item.

ON/OFF

ENTER

Parameter

•

–

■

SHIFT

■

SPACE

SHIFT

CAPS

ESC

CLRCODE

Left

Down

Right

7.2.2 Functionality of Operating Keys

■ The following figures explain the functionality of the operating keys on the BT200.

7-5

IM 1F5B2-01E

7. WORKING WITH THE BT200 BRAIN TERMINAL

7.3 Configuring Parameters with the BT200

7.3.1 Screens for Parameter Setup

• Refer to Section 7.4, “Parameter Summary,” to choose the parameter you want to

access. On the Menu screen, choose from the menu items to have access from one

parameter to another.

A: DISPLAY

B: SET 1

C: SET 2

D: ADJUST

E: CONTROL

F: TEST

- - WELCOME - -

BRAIN TERMINAL

ID : BT200

UTEL

FEED

Parameters

01 : MODEL

ULTRA YF

02 : TAG NO.

ABCDE

03 : SELF CHECK

GOOD

Parameters

A10 : FLOW RATE (%)

50.0%

A20 : FLOW RATE

10 m

A30 : TOTAL

100 m

Startup screen

Utilities

1. ID

ESC

The following operations are

available on the Utilities

screen:

1. Setting of ID for the BT200

2. Setting of security code

3. Selection between

messages

4. Adjustment of the contrast of

LCD display

5. Adjustment of printing

density (BT200-P00 only)

ENTER

ADJ

ESC

Menus

ENTER

HOME

ENTER

DIAG

ESC

DATA

PRNT

1. Menu

2. Upload

3. Download

4. List

ADJ

SET

Commands

HOME

For details on how to upload,

download and print parameters

(BT200-P00 only), see the

BT200 Brain Terminal

instruction manual.

ON/OFF

check connection

push ENTER key

Default Data screen

Menu screen

Parameter screen

7-6

IM 1F5B2-01E

7.3.2 Configuring Parameters

• The following is a typical example of the procedure for configuring a parameter. Use

this example as a reference when configuring other parameters.

• Example: Setting a Tag Number (Parameter B10)

In this example, you type the tag number as FIC-01.

B10 : TAG NO.

ABCDE

FIC - 01

A: DISPLAY

B: SET 1

C: SET 2

D: ADJUST

E: CONTROL

F: TEST

- - WELCOME - -

BRAIN TERMINAL

ID : BT200

UTEL

FEED

ON/OFF

Parameters

01 : MODEL

ULTRA YF

02 : TAG NO.

ABCDE

03 : SELF CHECK

GOOD

ENTER

ADJ

ESC

Menus

ENTER

HOME

Continued at the top on

the right

Continued from the bottom on

the left

Parameters

B10 : TAG NO.

ABCDE

B20 : SIZE

25mm

B21 : PRESS RATING

L PRESS

ENTER

caps

ESC

Parameter

ENTER

A: DISPLAY

B: SET 1

C: SET 2

D: ADJUST

E: CONTROL

F: TEST

ADJ

ESC

Menus

HOME

DIAG

ESC

DATA

PRNT

CLR

CODE

B10 : TAG NO.

ABCDE

FIC - 01

POFF

ESC

Parameter

print off

F2 : printer on

B10 : TAG NO.

FIC-01

Setting

FEED

ENTER

Use the ⁄ key to move

the cursor to the parameter

B10: TAG NO.

Type in the desired tag

number, i.e., FIC-01.

Pressing the ENTER key once

makes the cursor begin

blinking.

Pressing the ENTER key twice

stops the cursor from blinking.

Press the key if this tag

number is acceptable.

check connection

push ENTER key

Startup screen

Default Data screen

Menu screen

Parameter View screen

Setup screen

FEED

7-7

IM 1F5B2-01E

7. WORKING WITH THE BT200 BRAIN TERMINAL

7.4 Parameter Summary

This section summarizes parameters. Configure or change any of these parameters as

necessary. After configuration, always be sure to press the DIAG key to ensure that the

resulting self-test parameter x60: SELF CHECK reads GOOD.

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Note1: To use the unit other than those contained in parameters, select [SPE], and set parameter [C30], [C31] and [C32].

CAUTION

• All of your parameter settings will be canceled if you turn ULTRA YEWFLO off less

than 30 seconds after the parameter setup. Keep ULTRA YEWFLO turned on at least

30 seconds after setting up the parameters.

7-8

IM 1F5B2-01E

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● Setting the totalization rate (applies only to models with an indicator/totalizer component)

The totalization rate is a parameter that sets the kg per rate of the totalizer value for a case where the

value is shown on the indicator. The flowrate set in parameter B40 applies as the totalizer value.

Example: Setting to totalize as 100 counting per 1kg.

<1> Make sure in parameter B40, ‘kg’ is selected as the unit of flowrate.

<2> Make sure in parameter C10, ‘SCALED’ is selected.

<3> In this parameter C11, set the rate at 100.

C11

● Setting the pulse output rate

The pulse output rate is a parameter that sets the liter per rate for a case where the pulse output is fed to

a counter or other device. The flowrate set in parameter B40 applies as the pulse output.

Example: Setting to output as 1000 pulse 1 liter.

<1> Make sure in parameter B40, ‘l’ is selected as the unit of flowrate.

<2> Make sure in parameter C20, ‘SCALED’ is selected.

<3> In this parameter C21, set the rate at 1000.

C21

7-9

IM 1F5B2-01E

7. WORKING WITH THE BT200 BRAIN TERMINAL

● Setting a special unit

A special unit of flowrate which is not found in the choices in parameter B40 can be set and used with

these parameters.

Example: Setting the special unit ‘Sm

/h’

<1> In parameter C30, type Sm

/h.

<2> In parameter C31, set the basic unit (m

in this case).

<3> In parameter C32, specify the coefficient of conversion from the basic unit (for example,

×0.95).

C30, C31, C32

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7-10

IM 1F5B2-01E

7.5 Self-checking

7.5.1 Checking for Failures

(1) Checking for Failures Using the BT200

Verify that:

• BT200 is connected correctly;

• BT200 is operating correctly; and

• Parameters are configured correctly;

while referring to the following examples of failures.

Connect the BT200 to

ULTRA YEWFLO and

press the key.

After the screen on the left

appears, press the

key.

ENTER

● Example 1: Failure in Connection

FEED

Check cable connection.

Press the ENTER key.

BRAIN terminal

ID :

UTEL

ON/OFF

Communication failure.

Since communication is

not possible if the BT200 is

improperly connected to

ULTRA YEWFLO, the

message on the left

appears. Recheck the

connection. After

rechecking, press the

key (ESC).

● Example 2: Failure in Configuration of Parameters

The Default Data screen

shows the current results

of a self-check on ULTRA

YEWFLO.

Pressing the key

(DIAG) on the Parameters

screen enters the self-

check screen “x60: SELF

CHECK.”

ESC

Parameters

01 : MODEL

ULTRA YF

02 : TAG NO.

FIC–01

03 : SELF CHECK

ERROR

DIAG

DATA

PRNT

Parameters

B10 : TAG NO.

FIC–01

B20 : SIZE

25mm

B21 : PRESS RATING

L PRESS

ESC

FEED

PRNT

Self-check

B60 : SELF CHECK

ERROR

< ERROR >

< SPAN SET ERROR >

The Self-check screen

shows an error message if

there is an error.

ESC

(2) Checking for Failures Using the Indicator/Totalizer Component

NOTE

• If any failure is found as a result of self-checking, the display of the indicator/totalizer

component shows an error number. If there is more than one failure, the display

changes from one error number to another at two-second intervals. For details on the

meanings of error numbers, see Table 7.5.1.

Figure 7.5-1 Checking for Failures Using the Indicator/Totalizer Component

7-11

IM 1F5B2-01E

7. WORKING WITH THE BT200 BRAIN TERMINAL

7.5.2 Information on Failures and Corrective Measures

■ Table 7.5.1 summarizes the alarm messages, along with information on the failures

and corrective measures.

Table 7.5.1 Alarm Messages

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8-1

IM 1F5B2-01E

8. MAINTENANCE

This chapter explains the adjustment procedure needed for maintenance and the proce-

dures used to disassemble and reassemble ULTRA YEWFLO for parts replacement.

When doing maintenance on ULTRA YEWFLO, thoroughly read the instructions and

cautionary notes hereinafter given in order to handle the flowmeter correctly.

WARNING

• If the process fluid is harmful to personnel, handle ULTRA YEWFLO carefully even

after it has been removed from the process line for maintenance or other purposes.

Exercise extreme care to prevent the fluid from coming into contact with human flesh

and to avoid inhaling any residual gas.

IMPORTANT

• Precautions in Handling the Amplifier Assembly

Some of the parts used in the amplifier assembly may functionally succumb to

electrostatic discharge. Therefore when handling the assembly, use a protective

device such as an antistatic grounding strap. Exercise extreme care to avoid directly

touching any of the electronic parts and circuits in the assembly. Also, keep the

removed amplifier assembly in an antistatic bag.

8-2

IM 1F5B2-01E

8.1 Equipment Needed for Maintenance

Table 8.1 summarizes the pieces of equipment needed to maintain ULTRA YEWFLO.

Use maintenance-purpose equipment whose functionality has been adequately main-

tained and controlled.

Table 8.1 Equipment Needed for Maintenance

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Figure 8.1-1 Wiring of Equipment for Maintenance

CAUTION

•When using any test-purpose measuring instruments, do not ground them.

• All of your parameter settings will be canceled if you turn ULTRA YEWFLO off less

than 30 seconds after the parameter setup. Keep ULTRA YEWFLO turned on at least

30 seconds after setting up the parameters.

8-3

IM 1F5B2-01E

8. MAINTENANCE

8.2 Adjustment

This section explains the procedure used to adjust the ULTRA YEWFLO converter to

change the range or for other purposes. Adjust the converter in a maintenance room

complete with the equipment necessary for adjustment.

8.2.1 Zero Adjustment

■ No zero adjustment is necessary since the zero point does not shift.

IMPORTANT

• Because of the effect of electrical noise, ULTRA YEWFLO may provide an output

even when the flowrate is zero. In that case, properly eliminate the source of the

noise.

8.2.2 Span Adjustment

•Before span adjustment, check whether the range of the flowrate is adjustable or not

by following the instructions in Section 6.1, “Checking the Flowrate Range.” Spans

are automatically determined and set when you configure required parameters with a

BT200 BRAIN Terminal. Therefore, in normal applications, you need not confirm

the spans once they are set up. If you are verifying the analog output, follow the

procedure on the Verification Procedure.

Verification Procedure

<1> Wire the necessary pieces of equipment as shown in Figure 8.1-1. Allow at least

three minutes for the equipment to warm up.

<2> Configure the necessary parameters.

<3> Set span frequency with parameter F20: SET F MODE. (See the equation noted

below.)

<4> If the load resistance is 250 Ω, the digital multimeter should read 5 V. Make sure

the multimeter indicates the value calculated from R × 20 (mA) when a resistor of

a known value (R Ω) is used.

<5> Next, set parameter F20 at a frequency equal to 50% of the full-scale frequency.

Make sure the analog output is within the specified limits of accuracy.

<6> Finally, set parameter F20 at 0 to make sure the analog output is still within the

specified limits of accuracy.

• Equation for Determining the Span Frequency

f = KM • [1 - 5.25 × 10

-5

× (t - 15)] • Qf

where

f = span frequency (Hz)

Qf = maximum (span) flowrate (l/s)

KM = K-factor (p/l) (indicated on the data plate)

t = temperature of the fluid under operating conditions (°C)

• Simply configure the necessary parameters. The built-in microprocessor automati-

cally calculates the frequency at the maximum flowrate (span frequency). The span

frequency is indicated under parameter G11: SPAN F.

8-4

IM 1F5B2-01E

8.2.3 Trigger Level Adjustment (TLA) (Parameter H10)

■ TLA helps suppress the effects of external noise.

■ Parameter H10 (TLA) is adjusted to 0 as the default when ULTRA YEWFLO is

shipped from the factory.

■ ULTRA YEWFLO in principle is hardly affected by mechanical vibration. Make a

trigger level adjustment, however, if external noise is an issue or if ULTRA

YEWFLO gives a reading larger than the true value while the flowrate is zero.

■ Setting parameter H10 at a larger value (for example, a value from 0 to 2) heightens

the trigger level. This strategy will help reduce the effect of noise.

IMPORTANT

•Care must be taken when making a trigger level adjustment. If you set the parameter

for TLA at a value larger than necessary, the measurable lower limit of the flow

velocity rises to an unacceptable level, possibly impeding your measurement.

Before TLA Before TLA

High trigger level

Low trigger level

Waveform observed

across TP2 and COM

Waveform observed

across P and COM

Waveform observed across

TP2 and COM

Waveform observed across

P and COM

After TLA

High trigger level

Low trigger level

Waveform observed

across TP2 and COM

Waveform observed

across P and COM

Waveform observed

across TP2 and COM

Waveform observed

across P and COM

After TLA

Figure 8.2-3 Trigger Level Adjustment (at Lower Flowrates)

8.2.4 Loop Tests (Parameters F10 and F20)

• You can have ULTRA YEWFLO provide either a 4-20 mA DC output of 0.0% to

110.0% (parameter F10: SET % MODE) or a pulse output of 0 to 6,000 Hz (param-

eter F20: SET F MODE) for your loop tests.

8-5

IM 1F5B2-01E

8. MAINTENANCE

8.3 Disassembly and Reassembly

When disassembling or reassembling ULTRA YEWFLO for a part replacement or

maintenance, ALWAYS turn off both the flowmeter and flow of the process fluid. Use

the appropriate tools for the disassembly/reassembly of ULTRA YEWFLO.

CAUTION

• The maintenance work described hereinafter can be done at the location where

ULTRA YEWFLO is installed if it is a standard model. If your ULTRA YEWFLO is

an explosion-protected model, however, it is an established rule that you relocate it to

a non-hazardous area, do the maintenance work, and then reassemble it in its original

form. See “Installation and Operating Precautions for Flameproof Explosion-Pro-

tected Instruments” at the end of this manual for more information.

• No user modification is permitted on flameproof models of ULTRA YEWFLO. You

therefore are not allowed to add any additional indicator/totalizer component to those

models of ULTRA YEWFLO nor can you use ULTRA YEWFLO with the compo-

nent removed. If such modification is unavoidably necessary, consult Yokogawa

Electric Corporation.

• When disassembling a flameproof model of ULTRA YEWFLO, first turn the lock

screw clockwise with a special tool (Allen wrench) to unlock the cover, and then

remove the cover. After having replaced the cover, ALWAYS turn the lock screw

counterclockwise to lock the cover.

8.3.1 Removing the Indicator/Totalizer Component

• When removing the indicator/totalizer component to change the way it is viewed,

follow the procedure described below.

<1> Turn off ULTRA YEWFLO.

<2> Remove the cover on the converter.

<3> Using a flat-blade screwdriver, remove the two setscrews from the indicator/

totalizer component.

<4> Take the component out by hand.

<5> When reassembling the component into the converter after the component is

repositioned, follow these steps in their reverse order, while aligning the

component’s screw holes with the bolts in the converter and then fastening the two

set screws.

8-6

IM 1F5B2-01E

Figure 8.3-1 Removing the Indicator/Totalizer Component

8.3.2 Removing the Amplifier Unit

When removing the amplifier unit, follow the procedure described below.

<1> Turn off ULTRA YEWFLO.

<2> Remove the cover on the converter.

<3> If your ULTRA YEWFLO is a model with a built-in indicator/totalizer component,

remove the component according to the procedure in Subsection 8.3.1.

<4> Using a 5.5-mm hex size nut driver, remove the two bolts that clamp the amplifier

unit, while loosening the bolts alternately. Take the unit out keeping it level.

Figure 8.3-2 Removing the Amplifier Unit

CAUTION

•Do not twist the amplifier unit when removing it. Otherwise, the pins of the connec-

tor may be bent.

• Exercise care to avoid applying excess force to the amplifier unit.

Indicator/Totalizer <4>

Mounting screw <3>

Converter cover <2>

Mounting screw <4>

8-7

IM 1F5B2-01E

8. MAINTENANCE

8.3.3 Replacing the Sensor Assembly

(1) Removing the Sensor Assembly

NOTE

Sensor assemblies can be replaced only if your ULTRA YEWFLO is a flange model.

• When removing the sensor assembly to replace it, follow the procedure described

below.

<1> Remove the amplifier unit according to the procedure in Subsection 8.3.2. (Refer

to Subsection 8.3.1 to remove an amplifier unit of ULTRA YEWFLO that has an

indicator/totalizer component.)

<2> Unplug the terminal pin at the tip of the sensor assembly from the terminal board.

<3> Loosen the clamp screw at the neck of the case.

<4> Remove the screws on the bracket that couples the sensor assembly with the body.

Remove the bracket together with the converter case.

<5> Remove the bracket that couples the case with the body.

<6> Remove the four screws on the plate that mounts the sensor assembly on the body.

<7> Remove the sensor assembly from the body, while exercising care to avoid forcibly

bending the assembly.

Bracket <5>

Bracket <4>

<6>Plate

Sensor assembly <7>

Terminal pin <2>

Figure 8.3-3 Removing the Sensor Assembly

8-8

IM 1F5B2-01E

Accessories for Sensor Replacement (provided separately)

Sensor

assembly

Allen wrench Silicon compound O-ring

(2) Mounting a Sensor Assembly

When mounting a new sensor assembly for replacement, follow the procedure described

below.

<1> Make sure the stainless-steel tubing of the new sensor assembly fits properly into

the grooves on the body. (The tubing is preformed when shipped. If it does not fit

properly, however, reshape it so it fits into the grooves perfectly.)

<2> Using an organic solvent, clean the bottom surfaces of the sensor holders and the

surfaces of the body where the sensor holders are being mounted.

<3> Engage the metal ring with each sensor holder from the bottom surface of the

holder. Fit the O-ring coated with a uniform film of grease into the groove on one

side of the holder. At this point, exercise care to prevent the bottom surface of the

holder from getting grease on it.

CAUTION

• Exercise care to prevent the surfaces where the emitter/detector of the sensor assem-

bly are mounted from becoming damaged or contaminated with dust.

<4> Loosen the two setscrews on the plate beforehand with the supplied tool.

<5> Coat the middle of the emitter/detector’s bottom surface with an adequate amount

of silicon compound.

<6> Place the emitter/detector in the approximate middle of the sensor-mounting

surface on the body.

<7> Engage the projection of the plate with the hole (concave spot) on the back of the

sensor holder to position the plate in place.

<8> Fasten the plate with the four screws.

<9> After having fastened the plate, fasten the two setscrews to pressurize the metal

ring so the O-ring comes into tight contact with the body.

<10>For reassembly of parts other than the sensor assembly, follow these steps in the

reverse order of disassembly.

8-9

IM 1F5B2-01E

8. MAINTENANCE

Coat here with silicon

compound

(on both sides)

Sensor holder

Stainless-steel

tubing

Plate

Setscrews

Figure 8.3-4 Mounting the Sensor Assembly

8-10

IM 1F5B2-01E

8.4 Troubleshooting

ULTRA YEWFLO, among other instruments, is less likely to malfunction if handled

and used correctly. Problems may arise, however, if any failure exists in its phases of

application such as mounting or piping. If ULTRA YEWFLO fails to operate normally,

take corrective measures while referring to the troubleshooting flows hereinafter de-

scribed. Some causes of failure may be too complex to localize by using only those

troubleshooting flows. If any given failure seems to be too difficult to cope with,

consult Yokogawa’s service personnel.

8.4.1 Basic Troubleshooting Flow

Output is indicated

but no fluid is flowing.

The reading

fluctuates.

No output is indicated

but the fluid is flowing.

The flowrate reading

is inconsistent.

The flowrate reading

fluctuates.

Go to page 8-9. Go to page 8-10. Go to page 8-11.Go to page 8-8

START

YES

8-11

IM 1F5B2-01E

8. MAINTENANCE

8.4.2 Specific Troubleshooting Flows

■ Output is indicated but no fluid is flowing.

START

Is ULTRA YEWFLO

properly grounded?

P: Is no pulse present?

TP2: The signal

resonates to 50/60

Hz.

Check the fluid in the

pipeline.

Raise the trigger level.

Fill the pipeline.

Empty the pipeline.

There is a failure in the

emptiness-sensing

system.

Contact Yokogawa’s

service personnel.

Output is indicated.

YES

The output circuit of the

converter is faulty. Replace

the converter.

Full

Empty

Ground ULTRA

YEWFLO.

YES

Output is indicated.

8-12

IM 1F5B2-01E

■ No output is indicated but the fluid is flowing.

START

Contact Yokogawa’s

service personnel.

Is the signal current

present?

P: Are pulses present?

TP2: Is the signal

waveform normal?

YES

0mA

Change the

polarities.

Are the current’s

polarities correct?

Are there any

disconnected

terminals?

Is there a

broken cable?

Replace the

amplifier unit.

Replace the

sensor

assembly.

Replace the

amplifier.

Replace the

cable.

Fasten the

terminal.

4mA

There is no output.

YES

Lower the trigger

level.

8-13

IM 1F5B2-01E

8. MAINTENANCE

■ The flowrate reading is inconsistent.

Recheck the

setting of the

parameter.

START

Is the flowrate range

consistent with that on the

data plate?

Are the parameters

configured correctly?

The reading is

inconsistent.

YES

The output circuit of the

converter is faulty.

Replace the converter.

YES

Change the

flowrate range.

Configure the

parameters

correctly.

Is the receiving

resistance correct?

Change the

receiving

resistance.

Is the output consistent with

the reading of the indicator/

totalizer component or

BT200?

Is the output’s flowrate

reading consistent with the

value calculated from the

frequency at terminal P?

Check the piping conditions:

• Straight lengths of pipeline (page 4-1)

• Protrusion of gaskets (page 4-4)

• Loose piping connections

• Deposits inside piping

Contact Yokogawa’s

service personnel.

YES

Are the load resistance

and supply voltage within

the tolerance limits?

Adjust to within

the tolerance

limits.

YES

8-14

IM 1F5B2-01E

■ The flowrate reading fluctuates.

START

Contact Yokogawa’s

service personnel.

Is the flowrate

reading close to its

lower limit?

Is the output signal

at terminal P stable?

TP2: Is the voltage low?

YES

Replace the

batteries.

Does the supply voltage

signal contain ripples?

Are the terminals and cables

properly connected?

Replace the

amplifier unit.

Replace the

sensor

assembly.

Remedy the

improper

connection.

YES

Lower the

trigger level.

YES

The fluctuation may be due

to the cut-off-low-flowrate

feature. Turn up the flow of

fluid.

(Very high)

YES

Around 450 mVp-p

Check the piping conditions:

• Straight lengths of pipeline (page 4-1)

• Bubbles of gas (page 4-3)

• Protrusion of gaskets (page 4-4)

• Loose piping connections

The reading

fluctuates.

The output circuit

of the amplifier

assembly is faulty.

The reading

fluctuates.

The reading

fluctuates.

The reading fluctuates.

8-15

IM 1F5B2-01E

8. MAINTENANCE

8.4.3 Instructions on Use of Check Terminals of Amplifier Unit

Test all the check items hereinafter discussed in this subsection at the test points

between terminals P and COM and between terminals TP2 and COM.

CAUTION

• Do not ground any test-purpose measuring instruments.

COM terminal

P termina

TP2 terminal

HHT terminal

Figure 8.4-1 Check Terminals of Amplifier Unit

(1) TP2 Terminal

■ Used for trigger level adjustment. See Subsection 8.2.3.

■ Using an oscilloscope, observe the voltage waveform appearing across terminals TP2

and COM. Make sure the ultrasonic emitter/detector of the sensor assembly and

related circuits are operating normally.

a.A waveform with the vortex frequency shown in Figure 8.4-2 should be observed at

this test point. The waveform should be neither at the power supply frequency nor

at a frequency at which the pipeline vibrates.

b.If piping conditions are inferior, the waveform should look like the one in Figure

8.4-3.

Figure 8.4-2 Normal Waveform at Terminal TP2

8-16

IM 1F5B2-01E

Figure 8.4-3 Waveform of Disturbed Flow at Terminal TP2

(2) P terminal

■ Used for trigger level adjustment. See Subsection 8.2.3.

9-1

IM 1F5B2-01E

9. STANDARD SPECIFICATIONS

9.1 STANDARD SPECIFICATION

Fluid to be Measured:Liquid

Measuring condition: Sound speed 500 to 2000 m/s

Be sure there are no bubbles in the flow.

Avoid severe sticky and slurry fluid meterings.

Do not use this meter where pulsating flow/pulsating pressure

exist.

Measurable Flow Rates: Refer to item 6.1.

Accuracy: ± 1.0% of reading

± 0.5% of reading is also available as an option.

(refer to item 6.1)

Note: The above shows the accuracy of pulse output. For analog

output, add up ± 0.1% of full scale to the above values.

Repeatability: ± 0.2% of reading

Process Temperature Range: –40 to 200 °C (–40 to 150 °C for 15A)

Process Pressure Limit: Up to flange rating.

Ambient Temperature Range:

–40 to 85 °C (general type)

–30 to 80 °C (with Indicator/Totalizer)

–40 to 75 °C (CENELEC Explosion proof type)

–20 to 60 °C (CENELEC Intrinsic safety type)

–20 to 60 °C (JIS Flameproof type)

(Model UYF200 is affected by fluid temperature. See Figure 9.1-2)

Ambient Humidity Range:5 to 100% Relative Humidity (at 40 °C)

(non-condensing)

Power Supply Voltage:10.5 to 42 V DC

(Refer to Figure 9.1-1 Relationship Between Power Supply

Voltage and Load Resistance)

Output signal:Analog, Pulse

Both Analog and Pulse output can be obtained simultaneously.

In this case refer to the item 5.5.

Analog: 4 to 20 mA DC, 2-wire system.

Pulse: transistor contact (open drain), 3-wire system.

Contact rating: 30 V DC, 120 mA DC

Low level: 0 to 2 V DC.

Pulse frequency: Max. 6 kHz

Duty cycles: Approx. 50% (1:2 to 2:1)

Dumping time constant: 0 to 64 Sec (can be set in 8 steps)

Delay time: 0.5 Sec

Analog output circuit time constant: 0.3 Sec

9-2

IM 1F5B2-01E

Mounting: Model UYF200; flange mounting or wafer mounting by flange

adjacent to the pipeline.

Model UYFA21; 2 inch pipe or wall mounting.

Refer to item Remarks on Installation for details.

Material: Model UYF200; body and shedder bar: SCS 14A casting

stainless steel (equivalent to CF8M, SUS316)

Sensor; SUS316 stainless steel

Bracket; SCS13 casting stainless steel

Model UYF200, UYFA21;

Converter case; Aluminum alloy

Coating Color: Converter case, cover, Terminal box, cover; Deep sea moss

green (Polyurethane anticorrosion coating)

Enclosure Classification: Designed to meet JIS C0920 watertight (equivalent to IEC

IP67, NEMA4X)

Electrical Classification: Approved by JIS Flameproof, certified for Ex d IIC T6

Electrical Connection: JIS G1/2 Female, ANSI 1/2 Female, DIN Pg13.5 Female,

M20mm Female.

Signal Cable: Model UYF021, used for remote detector and converter.

Max. length: 20m.

Outer Sheath Material: Heat resistance vinyl.

Durable Temperature; 100°C

Weight: Refer to the external dimension item 9.4.

Calibration: This flowmeter is factory-calibrated using a water flow.

Communication signal: BRAIN communication signal

(superimposed on a 4 to 20 mA DC signal)

Communication-line Condition:

Load resistance; 250 to 600 W (includes cable resistance)

Region within communication: 2 km (when CEV cables are used)

Load capacitance: 0.22 µ F Max.

Load inductance: 3.3 mH Max.

Refer to Figure 9.1-1.

Communication cables must be laid at least 15 cm away from power lines. Do not lay

the cables parallel to power lines. Instruments connected for receiving resistance: Input

impedance 10 kΩ or greater (at 2.4 kHz)

Indicator/Totalizer: Six-digit LCD display. Totalizer value is protected by an

EEPROM at the time of a power failure.

The totalized flow as well as instantaneous flow rate in engineer-

ing unit or percent (%) of span can be displayed.

Alternative display is also possible.

In mounting direction, the right and left 90° is rotatable.

Approved by CENELEC Explosion-proof

KEMA No.: Ex-97. D. 2342

EEx d IIc T6...T3

9-3

IM 1F5B2-01E

9. STANDARD SPECIFICATIONS

Approved by CENELEC Intrinsic Safety

KEMA No.: Ex-97. D. 4156

EEx ia IIc T3, T4

Maximum voltage Vmax=30V DC

Maximum current Imax=165mA

Maximum power IP max=0.9W

Internal capacitance Cint=6nF

Internal inductance Lint=730µH

R =

E–10.5

0.0236

250

600

10.5 16.4 24.7 42

Power Supply Voltage E (V)

Load Resistance R (Ω)

Communication

applicable range

Note: In the case of CENELEC intrinsic safety, the power supply voltage shold be under 30 VDC.

Figure 9.1-1 Relationship Between Power Supply Voltage and Load Resistance

Fluid Temperature (°C)

-40 60 80

200

-20

-30

-40

JIS Flameproof

model

With Indicator/Totalizer

model

General-purpose

model

-15

-20

Ambient Temperature (°C)

Figure 9.1-2 Operating Temperature Limit (for model UYF200)

Table 9.2-1 Paint Color and Codes

Codes

Munsell Renotation Code

N1.5

Color

Black

P2 7.5BG4/1.5 Jade green

P7 Metallic silver

9-4

IM 1F5B2-01E

Table 9.2-2 Pressure Test Value

Pressure

2.1 MPa (21 kgf/cm

)

5.0 MPa (51 kgf/cm

)

2.9 MPa (29 kgf/cm

)

Flange Rating

JIS 10K

JIS 20K

ANSI Class 150

7.5 MPa (76 kgf/cm

)ANSI Class 300

9.2 Model and Suffix Codes

Model and Suffix Codes (Style Code: S2)

UYF200 Ultrasonic Vortex Flowmeter (Integral type, Remote type detector)

Model

UYF201J

UYF202J

UYF204J

UYF205J

UYF208J

UYF210J

UYF215J

UYF220J

.....................

15 mm (1/2inch)

25 mm (1 inch)

40 mm (1-1/2 inch)

50 mm (2 inch)

80 mm (3 inch)

100 mm (4 inch)

150 mm (6 inch)

200 mm (8 inch)

Converter –A

................

–N

................

Integral Type

Remote Type

Output Signal D

...............

4 to 20 mA DC, Pulse,BRAIN

communication

Remote Type

Body Material –S

...........

Casting stainless steel (SCS 14A)

Process

Connection

(Note 1)

........

.......

........

JIS10K Flange

JIS20K Flange

ANSI Class 150 Flange

ANSI Class 300 Flange

JIS10K Wafer

JIS20K Wafer

ANSI Class 150 Wafer

ANSI Class 300 Wafer

JPI Class 150 Wafer

JPI Class 300 Wafer

Electrical

Connection

........

JIS G1/2 Female

ANSI 1/2 NPT Female

DIN Pg 13.5 Female

ISO M20X1.5 Female

Indicator/

Totalizer (Note 2)

–D

...

–N

...

With Indicator/Totalizer

None

Options /

■

Refer to table Option Specifications

Suffix Code

Description

Electrical

Classification

/JF1

/FF1

/FS1

/KF1

/KS1

/CS1

JIS Explosionproof

FM Explosionproof

FM Intrinsic Safety

CENELEC Explosionproof

CENELEC Intrinsic Safety

CSA Intrinsic Safety

Table 9.2-3 Flowmeter Selection Guide

200

(8)

YES

150

(6)

YES

100

(4)

YES

(3)

YES

(2)

YES

(1-1/2)

YES

(1)

YES

Process

Connection

Wafer

Type

Flange

Type

Body

Material

Casting

Stainless

Steel

Nominal Size mm (inch)

9-5

IM 1F5B2-01E

9. STANDARD SPECIFICATIONS

UYFA21 Ultrasonic Vortex Flowmeter Converter (Remote type)

Model

UYFA21J

.....................

Ultrasonic Vortex Flow Converter

Output Signal –D

.............

4 to 20 mA DC, Pulse,BRAIN

communication

Electrical

Connection

............

JIS G1/2 Female

ANSI 1/2 NPT Female

DIN Pg 13.5 Female

M20 mm Female

Indicator/

Totalizer

–D

......

–N

......

With Indicator/Totalizer

None

Mounting Bracket

.......

SECC For 2 inch Pipe Mounting

SUS304 For 2 inch Pipe Mounting

None

Options /

■

Refer to table Option Specifications

Suffix Code

Description

/JF1

/FF1

/FS1

/FU1

/KF1

/KS1

/CS1

Electrical

Classification

JIS Flame proof

FM Explosion proof

FM Intrinsically safe

Combined "FF1"and "FS1"

CENELEC (KEMA) Flame proof

CENELEC (KEMA) Intrinsically safe

CSA Intrinsically safe

UYF021 Signal Cable

Model

UYF021J

.....................

Ultrasonic Vortex Flow Converter

Cable End –0

..............

–1

..............

Without End finish (Note 3)

With End finish

Cable Length –05

.........

–10

.........

–15

.........

–20

.........

–

■■

......

5 m

10 m

15 m

20 m

■■

m (Note 4)

Options /C

■

(Note 5)

Cable end finish part

Suffix Code Description

Note 1: Refer to table 9.2-3.

Note 2: Indicator/Totalizer is not available for remote type detector.

Note 3: One set of end finish part is attached.

Note 4: Fill in two digit figure per 5 m unit.

The cable can be cut at required length within 20 m at customer side. In this case, select Cable End

Code [-0].

Note :5 An entered digit figure shows required set quantity.

9-6

IM 1F5B2-01E

9.3 Option Specifications

Option Specifications (for model UYF200, UYFA21)

Item

Specifications

Code

Electrical Classification

JIS Flameproof Ex d IIC T6 Certified by TIIS (Note 2).

JF1

JIS Flameproof Packing Adapter

Electrical connection should be : G1/2 female thread.

Applicable Cable φ8.5 to φ11.

PG5

Stainless Steel Bolt & Nut Assembly

Used when a wafer type is installed for a process.

Material SUS304.

BLT

Stainless Steel Tag Plate SUS304 tag plate hung on converter case. SCT

Paint Color Change Only for converter covers. Refer to Table 9.2.1. See Table 9.2.1

Material Certificate

Reproduced material certificate for body from material

manufacture.

M01

Static Pressure and Leakage Test

Certificate

Refer to Table 3 for Pressure test value.

Test time 10 minutes.

T01

Degrease Treatment (Note 5) The body is cleaned by trichloroethylene. K1

Epoxy Coating Epoxy coating for meter case and cover. X1

Converter Installing Direction

180° Change

Converter installing direction

180° change inversely when shipped.

CRC

Accuracy ± 0.5% Type

In the case of JIS Flame proof (/JF1), specify JIS G1/2 female for electrical connection and also specify in the option code with Flameproof

packing adapter (PG5) for the cable wire construction.

TIIS is the abbreviation of Technology Institution of Industrial Safety

The JIS G1/2 female is not applicable for electrical connection.

• In case of specifying JIS Flameproof Explosion proof type, JIS G1/2 female is applied for wiring connection.

• Specify in the option code with Flame proof packing ground (/PG5) for the cable wire construction.

In case of specifying FM explosion proof type, ANSI 1/2 NPT female is applied for wiring connection.

In case of specifying CENELEC explosion proof type, ANSI 1/2 NPT female, DIN Pg 13.5female or ISO M20ϫ1.5 female is applied for

wiring connection.

In case of specifying CSA explosion proof type, ANSI 1/2 NPT female is applied for wiring connection.

There is a case that a little calibration water should stay in the meter tube. So this is not degrease treatment in strict sense.

When this option is chosen, the output is set at low level (3.6 mA) when burn-out. Otherwise is set at over high level (21.6 mA) at shipping.

Model UYF202J (25 mm), UYF215J (150mm), UYF220J (200mm) is not applicable.

Note 1:

Note 2:

Note 3:

Note 4:

Note 5:

Note 6:

Note 7:

Note 8:

Note 9:

Note 10:

For accuracy guaranteed range refer item “Sizing”. HAC

Applicable Model

UYF200 wafer type

All Models

UYF200J

All Models

Lightning Protector

There is an arrester is inside converter for power supply line.

Max. power supply voltage: 30 VDC

UYF200J-A

UYFA21J

Down-Scale burnout in case of CPU failure

(Note 6)

Set output under 3.6 mA (low) when burn-out occurred. C1

UYF200J-A

UYFA21J

UYF200J

UYF200J (Note 7)

KF1

KS1

CENELEC Explosion Proof Type

CENELEC Intrinsic Safety type

All Models (Note 1)

All Models (Note 6)

All Models ( Note 3,6)

All Models

FM Flameproof Explosion proof type

FM Intrinsic Safety type

CSA Intrinsic Safety type

All Models (Note 5)

All Models (Note 7)

FF1

FS1

CS1

9-7

IM 1F5B2-01E

9. STANDARD SPECIFICATIONS

9.4 EXTERNAL DIMENSIONS

■ Model UYF200 (Integral type, Remote type detector)

● Wafer type

Terminal Cover

60 60

Flow

Electrical

Connection

Clamp

For JIS

Flameproof

Note: Indicator/Totalizer can be mounted horizontally or vertically

Nominal

Size

Mass (kg)A

50 mm

80 mm

100

210

224

47.5

71.0

126

3.5

5.0

100 mm 120 237 93.8 152 7.1

Note: For flowmeter with Indicator/Totalizer, add 0.1 kg.

Indicator

Indicator/Totalizer

25 mm

40 mm

202

204

23.4

36.6

2.2

2.6

9-8

IM 1F5B2-01E

■ Integral type

● Flange type

Note: Indicator/Totalizer can be mounted horizontally or vertically

Nominal

Size

AB C

25 mm

40 mm

150

202

204

23.4

130

Nominal

Size

10K

ANSI FlangeJIS Flange

20K class 150 class 300

25 mm

40 mm

4.8

6.1

5.1

6.5

4.2

5.9

5.3

8.2

Note: For flowmeter with Indicator/Totalizer, add 0.1 kg.

Mass (kg)

Terminal Cover

60 60

Electrical

Connection

Clamp

For JIS

Flemeproof

Flow

Indicator

Indicator/Totalizer

50 mm

80 mm

100 mm

7.3

11.0

16.0

8.0

13.0

19.0

8.4

14.0

20.0

9.5

17.0

28.0

50 mm

80 mm

100 mm

170

200

220

210

224

237

47.5

71.0

93.8

15 mm

202 12.8

36.6

15 mm 4.8 5.1 4.2 5.3

9-9

IM 1F5B2-01E

9. STANDARD SPECIFICATIONS

Terminal Cover

Electrical Connection

Indicator/Totalizer

Clamp

For JIS Flameproof

Flow

Unit: mm

φ78

φC

Note: Indicator/Totalizer can be mounted horizontally or vertically

Nominal

Size

Nominal

Size

10K

ANSI FlangeJIS Flange

20K class 150 class 300

Note: For flowmeter with Indicator/Totalizer, add 0.1 kg.

Mass (kg)

150mm

200mm

270

310

257

282

138.8

185.6

150mm

200mm

27.0

37.0

34.0

48.0

29.0

46.0

45.0

70.0

■ Model UYFA21

LOCK

47.5

87.5

137

137.5 48

282466

183

230

φ78

2B pipe (φ60.5 )

Indicator/Totalizer

Terminal Cover

Electrical Connection (both side)

Clamp

For JIS

Flameproof

Mass :2.3 kg

Note :For flowmeter with Indicator/Totalizer, add 0.1 kg.

φ10

9-10

IM 1F5B2-01E

■ Model UYF021

(G)

(C)

(B)

(A)

(G)

(C)

(B)

(A)

computer treated

computer not treated

UYF 021

specified

length (L)

IMPORTANT

(A),(B),(C) connect their each terminal. (G) connect ground terminal.

9-11

IM 1F5B2-01E

9. STANDARD SPECIFICATIONS

■ Terminal Configuration and Terminal Wiring

–

SUPPLY

PULSE

Power and 4 to 20 mA DC

output

Pulse output

Ground terminal

Terminal WiringTerminal configuration

SUPPLY

PULSE

–

• Remote Type (Detector Part)

Common terminal

Terminal to remote converter

Terminal WiringTerminal configuration

* Use UYF021 Signal Cable

Ground terminal

• Remote Type (Converter Part)

LOCK

PULSE

SUPPLY

Terminal WiringTerminal configuration

Common terminal

Terminal to remote detector

* Use UYF021 Signal Cable

–

SUPPLY

PULSE

Power and 4 to 20 mA DC

output

Pulse output

Ground terminal

IMPORTANT

If the connection is wrong, ULTRA YEWFLO will fail to operate properly.

EX-B01E 1

IM 1F5B2-01E

INSTALLATION AND OPERATING PRECAUTIONS FOR JIS FLAMEPROOF EQUIPMENT

INSTALLATION AND OPERATING PRECAUTIONS

FOR JIS FLAMEPROOF EQUIPMENT

Apparatus Certified Under Technical Criteria (IEC-compatible Standards)

1. General

The following describes precautions on electrical apparatus of flameproof construction

(hereinafter referred to as flameproof apparatus) in explosion-protected apparatus.

Following the Labour Safety and Health Laws of Japan, flameproof apparatus is sub-

jected to type tests to meet either the technical criteria for explosionproof electrical

machinery and equipment (standards notification no. 556 from the Japanese Ministry of

Labour) (hereinafter referred to as technical criteria), in conformity with the IEC

Standards, or the “Recommended Practice for Explosion-Protected Electrical Installa-

tions in General Industries,” published in 1979. These certified apparatus can be used in

hazardous locations where explosive or inflammable gases or vapours may be present.

Certified apparatus includes a certification label and an equipment nameplate with the

specifications necessary for explosion requirements as well as precautions on explosion

protection. Please confirm these precautionary items and use them to meet specification

requirements.

For electrical wiring and maintenance servicing, please refer to “Internal Wiring Rules”

in the Electrical Installation Technical Standards as well as “USER’S GUIDELINES for

Electrical Installations for Explosive Gas Atmospheres in General Industry,” published

in 1994.”

To meet flameproof requirements, equipment that can be termed “flameproof” must:

(1) Be certified by a Japanese public authority in accordance with the Labour Safety and

Health Laws of Japan and have a certification label in an appropriate location on its

case, and

(2) Be used in compliance with the specifications marked on its certification label,

equipment nameplate and precautionary information furnished.

2. Electrical Apparatus of Flameproof Type of Explosion-Protected Construction

Electrical apparatus which is of flameproof construction is subjected to a type test and

certified by the Japanese Ministry of Labour aiming at preventing explosion caused by

electrical apparatus in a factory or any location where inflammable gases or vapours

may be present. The flameproof construction is of completely enclosed type and its

enclosure shall endure explosive pressures in cases where explosive gases or vapours

entering the enclosure cause explosion. In addition, the enclosure construction shall be

such that flame caused by explosion does not ignite gases or vapours outside the

enclosure.

3. Terminology

(1) Enclosure

An outer shell of an electrical apparatus, which encloses live parts and thus is needed

to configure explosion-protected construction.

EX-B01E 2

IM 1F5B2-01E

(2) Shroud

A component part which is so designed that the fastening of joint surfaces cannot be

loosened unless a special tool is used.

(3) Enclosure internal volume

This is indicated by:— the total internal volume of the flameproof enclosure minus

the volume of the internal components essential to equipment functions.

(4) Path length of joint surface

On a joint surface, the length of the shortest path through which flame flows from

the inside to outside of the flameproof enclosure. This definition cannot be applied to

threaded joints.

(5) Gaps between joint surfaces

The physical distance between two mating surfaces, or differences in diameters if the

mating surfaces are cylindrical.

Note: The permissible sizes of gaps between joint surfaces, the path length of a joint

surface and the number of joint threads are determined by such factors as the

enclosure’s internal volume, joint and mating surface construction, and the

explosion classification of the specified gases and vapours.

4. Installation of Flameproof Apparatus

(1) Installation Area

Flameproof apparatus may be installed, in accordance with applicable gases, in a

hazardous area in Zone 1 or 2, where the specified gases are present. Those appara-

tus shall not be installed in a hazardous area in Zone 0.

Note:Hazardous areas are classified in zones based upon the frequency of the appear-

ance and the duration of an explosive gas atmosphere as follows:

Zone 0: An area in which an explosive gas atmosphere is present continuously or is

present for long periods.

Zone 1: An area in which an explosive gas atmosphere is likely to occur in normal

operation.

Zone 2: An area in which an explosive gas atmosphere is not likely to occur in normal

operation and if it does occur it will exist for a short period only.

(2) Environmental Conditions

The standard environmental condition for the installation of flameproof apparatus is

limited to an ambient temperature range from -20∞ to +40∞C (for products certified

under Technical Criteria). However, some field-mounted instruments may be

certified at an ambient temperature up to +60∞C as indicated on the instrument

nameplates. If the flameproof apparatus are exposed to direct sunshine or radiant heat

from plant facilities, appropriate thermal protection measures shall be taken.

5. External Wiring for Flameproof Apparatus

Flameproof apparatus require cable wiring or flameproof metal conduits for their

electrical connections. For cable wiring, cable glands (cable entry devices for flameproof

type) to wiring connections shall be attached. For metal conduits, attach sealing fittings

as close to wiring connections as possible and completely seal the apparatus. All non-

live metal parts such as the enclosure shall be securely grounded. For details, see the

“USER’S GUIDELINES for Electrical Installations for Explosive Gas Atmospheres in

General Industry,” published in 1994.

EX-B01E 3

IM 1F5B2-01E

INSTALLATION AND OPERATING PRECAUTIONS FOR JIS FLAMEPROOF EQUIPMENT

(1) Cable Wiring

* For cable wiring, cable glands (cable entry devices for flameproof type) specified or

supplied with the apparatus shall be directly attached to the wiring connections to

complete sealing of the apparatus.

* Screws that connect cable glands to the apparatus are those for G- or PF-type parallel

pipe threads (JIS C 0202) with no sealing property. To protect the apparatus from

corrosive gases or moisture, apply nonhardening sealant such as liquid gaskets to

those threads for waterproofing.

* Specific cables (conforming to JIS C 3401) shall be used as recommended by the

“USER’S GUIDELINES for Electrical Installations for Explosive Gas Atmospheres in

General Industry,” published in 1994.

* If necessary, appropriate protective pipes (conduit or flexible pipes), ducts or trays

shall be used for preventing the cable run (outside the cable glands) from damage.

* To prevent explosive atmosphere from being propagated from Zone 1 or 2 hazardous

location to any different location or non-hazardous location through the protective

pipe or duct, apply sealing of the protective pipes in the vicinity of individual bound-

aries, or fill the ducts with sand appropriately.

* When branch connections of cables, or cable connections with insulated cables inside

the conduit pipes are made, a flameproof or increased-safety connection box shall be

used. In this case, flameproof or increased-safety cable glands meeting the type of

connection box must be used for cable connections to the box.

(2) Flameproof Metal Conduit Wiring

* For the flameproof metal conduit wiring, 600-V PVC insulated wires (JIS C 3307) or

insulated wires shall be used as recommended by the USER’S GUIDELINES for

Electrical Installations for Explosive Gas Atmospheres in General Industry, published

in 1994.

* For conduit pipes, heavy-gauge steel conduits conforming to JIS C 8305 Standard

shall be used.

* Flameproof sealing fittings shall be used in the vicinity of the wiring connections, and

those fittings shall be filled with sealing compounds to complete sealing of the

apparatus. In addition, to prevent explosive gases, moisture, or flame caused by

explosion from being propagated through the conduit, always provide sealing fittings

to complete sealing of the conduit in the following locations:

(a) In the boundaries between the hazardous and non-hazardous locations.

(b) In the boundaries where there is a different classification of hazardous location.

* For the connections of the apparatus with a conduit pipe or its associated accessories,

G- or PF-type parallel pipe threads (JIS C 0202) shall be used to provide a minimum

of five- thread engagement to complete tightness. In addition, since these parallel

threads do not have sealing property, nonhardening sealant such as liquid gaskets shall

thus be applied to those threads for ensuring waterproofness.

* If metal conduits need flexibility, use flameproof flexible fittings.

EX-B01E 4

IM 1F5B2-01E

6. Maintenance of Flameproof Apparatus

To maintain the flameproof apparatus, do the following. (For details, see Chapter 10

“MAINTENANCE OF EXPLOSION-PROTECTED ELECTRICAL INSTALLATION”

in the USER’S GUIDELINES for Electrical Installations for Explosive Gas Atmospheres

in General Industry.)

(1) Maintenance servicing with the power on.

Flameproof apparatus shall not be maintenance-serviced with its power turned on.

However, in cases where maintenance servicing is to be conducted with the power

turned on, with the equipment cover removed, always use a gas detector to check

that there is no explosive gas in that location. If it cannot be checked whether an

explosive gas is present or not, maintenance servicing shall be limited to the follow-

ing two items:

(a) Visual inspection

Visually inspect the flameproof apparatus, metal conduits, and cables for damage or

corrosion, and other mechanical and structural defects.

(b) Zero and span adjustments

These adjustments should be made only to the extent that they can be conducted

from the outside without opening the equipment cover. In doing this, great care must

be taken not to cause mechanical sparks with tools.

(2) Repair

If the flameproof apparatus requires repair, turn off the power and transport it to a

safety (non-hazardous) location. Observe the following points before attempting to

repair the apparatus.

(a) Make only such electrical and mechanical repairs as will restore the apparatus to its

original condition. For the flameproof apparatus, the gaps and path lengths of joints

and mating surfaces, and mechanical strength of enclosures are critical factors in

explosion protection. Exercise great care not to damage the joints or shock the

enclosure.

(b) If any damage occurs in threads, joints or mating surfaces, inspection windows,

connections between the transmitter and terminal box, shrouds or clamps, or external

wiring connections which are essential in flameproofness, contact Yokogawa Electric

Corporation.

CAUTION: Do not attempt to re-process threaded connections or refinish joints or

mating surfaces.

repaired by component replacement, as this will not directly affect the requirements

for flameproof apparatus (however, bear in mind that the apparatus must always be

restored to its original condition). If you attempt to repair the flameproof apparatus,

company-specified components shall be used.

(d) Before starting to service the apparatus, be sure to check all parts necessary for

retaining the requirements for flameproof apparatus. For this, check that all screws,

bolts, nuts, and threaded connections have properly been tightened.

(3) Prohibition of specification changes and modifications

Do not attempt to change specifications or make modifications involving addition of

or changes in external wiring connections.

EX-B01E 5

IM 1F5B2-01E

INSTALLATION AND OPERATING PRECAUTIONS FOR JIS FLAMEPROOF EQUIPMENT

7. Selection of Cable Entry Devices for Flameproof Type

IMPORTANT

The cable glands (cable entry devices for flameproof type) conforming to IEC Standards

are certified in combination with the flameproof apparatus. So, Yokogawa-specified

cable entry devices for flameproof type shall be used to meet this demand.

References:

(1) Type Certificate Guide for Explosion-Protected Construction Electrical Machinery

and Equipment (relating to Technical Standards Conforming to International Stan-

dards), issued by the Technical Institution of Industrial Safety, Japan

(2) USER’S GUIDELINES for Electrical Installations for Explosive Gas Atmospheres in

General Industry (1994), issued by the Japanese Ministry of Labour, the Research

Institute of Industrial Safety

Yokogawa UYFA21 Ultrasonic Vortex Flowmeter Handleiding

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