GO
2
Achieve
User Guide
Introduction
Thank you for buying the GO
2
Achieve Fingertip Pulse Oximeter.
This small, portable device will give you important information
about your oxygen saturation (the amount of oxygen in your
blood) and pulse rate at your fingertip! The GO
2
Achieve is easy
to use and needs no routine maintenance except battery
replacement. This User Guide explains how to use and care for
your GO
2
Achieve.
Contents of Package
• GO
2
Achieve
• One AAA Alkaline Battery
• User Guide
Intended Use
GO
2
Achieve is intended to measure blood oxygen saturation
(%SpO
2
) (the amount of oxygen in your blood) and pulse rate
of both adults and children. It is designed for fingers (not the
thumb) between 0.3 and 1.0 inch (0.8 – 2.5 cm) thick. The index
finger (pointer finger) is most recommended.
Warnings
• Keep the oximeter away from young children. Small items
such as the battery door, battery, and lanyard are choking
hazards.
• Certain activities may pose a risk of injury, including
strangulation, if the lanyard should become wrapped around
your neck. Use the lanyard with caution.
• Before changing batteries, make sure the GO
2
Achieve is off
and is not applied to a digit.
Cautions
• The GO
2
Achieve might misinterpret excessive movement as
good pulse strength. Limit finger movement as much as
possible when using the device.
• The GO
2
Achieve must be able to measure your pulse
properly to give you an accurate reading. Do not put the
device on the same hand/arm when using a blood pressure
cuff or monitor.
• The GO
2
Achieve has no alarms. It will not sound if the
amount of oxygen in your blood is low or if your pulse rate is
too high or too low.
• Do not sterilize, autoclave, or place the GO
2
Achieve in liquid
or clean it with agents containing ammonium chloride,
isopropyl alcohol, or products that are not listed in this User’s
Guide. Do not pour or spray any liquids onto the GO
2
Achieve.
• Any of the following conditions may reduce the performance
of the GO
2
Achieve:
- flickering or very bright light;
- weak pulse quality (low perfusion);
- low hemoglobin;
- arterial catheters;
- nail polish, and/or artificial nails; and
- any tests recently performed on you that required an
injection of intravascular dyes.
• The GO
2
Achieve may not work if you have poor circulation.
Rub your finger to increase circulation, or place the device on
another finger.
• The GO
2
Achieve measures oxygen saturation of functional
hemoglobin. High levels of dysfunctional hemoglobin
(caused by sickle cell anemia, carbon monoxide, etc.) could
affect the accuracy of the measurements.
• Batteries can leak or explode if used or disposed of
improperly. Remove the battery if the GO
2
Achieve will be
stored for more than 30 days.
• Do not use the GO
2
Achieve in a combustible environment
(oxygen enriched environment).
• Do not use the GO
2
Achieve outside the specified operating
and storage temperature ranges.
• Do not use the GO
2
Achieve for more than 30 minutes without
relocating the device to another finger.
• The GO
2
Achieve needs to be used according to information
provided in the User Guide.
• Do not tamper with, or hang lanyard from the flexible circuit.
• When using the GO
2
Achieve in the home, avoid exposing the
GO
2
Achieve to lint and dust.
• Field strengths from fixed transmitters, such as base stations
for radio (cellular/cordless) telephones and land mobile
radios, amateur radio, AM and FM radio broadcast towers
and TV broadcast towers may affect accuracy.
• Use in emergency vehicles with communication systems
may affect accuracy.
• Functional tester cannot be used to assess the accuracy of
this pulse oximeter.
• Follow local disposal and recycling laws for the GO
2
Achieve
and its components, including the battery.
• The GO
2
Achieve is a precision electronic instrument and
must be repaired by Nonin Technical Service.
Symbols
The following symbols are associated with your GO
2
Achieve.
Installing the Battery
One 1.5 volt AAA-size (LR03) battery powers the GO
2
Achieve
for approximately 2400 measurements. Nonin recommends
using alkaline batteries (one is included with each new GO
2
Achieve). NOTE: You may use rechargeable batteries; however,
they may require more frequent replacement.
1. Remove the battery door located on the left side of the GO
2
Achieve by sliding it towards you.
2. Insert one new 1.5 volt AAA-size battery. Follow the plus (+)
and minus (-) markings for battery direction (as shown inside
of the battery compartment).
3. Carefully reposition the battery door. NOTE: Do not force it
into place; it fits only when positioned correctly.
When battery is low, the battery indicator symbol on the display
will flash. Remove battery if the device will be stored for more
than 30 days. Replace low battery as soon as possible.
Applying the GO
2
Achieve to Your Finger
Hold the GO
2
Achieve with the display facing toward you; slide
your finger into the opening at the bottom of the device, as shown
at right, until the fingertip touches the built-in stop guide. The
index (pointer) finger is recommended.
Have your forearm parallel to the floor when you use the GO
2
Achieve. Make sure your finger is centered within the finger guide
and the GO
2
Achieve is at heart or chest level.
NOTE: Correct positioning of the device on your finger is critical
for accurate measurements. While on the finger, do not press the
GO
2
Achieve against any surface and do not squeeze or hold it
together. The internal spring provides the correct pressure;
additional pressure may cause inaccurate readings.
Verifying Operation
The GO
2
Achieve LCD has an integrated backlight that turns on
automatically in low light conditions. This allows the display to be
visible in dark spaces.
If the GO
2
Achieve does not turn on or if it shuts off unexpectedly,
remove the GO
2
Achieve from your finger, remove the battery
and see the Troubleshooting section. Continually verify
operation.
Reading Your Results
When you put your finger in the GO
2
Achieve, you’ll notice an
LCD display come on. The numbers you see show:
• the amount of oxygen in your blood, displayed as %SpO
2
;
and
• your Pulse Rate, displayed as a 2 or 3 digit number,
measuring the number of times your heart beats per minute.
The Pulse Quality indicator ( ) displays the strength of the pulse
rate signal. Bars will display after the , indicating pulse signal
strength ( ); the greater the number of bars indicates a greater
pulse quality signal strength.
If you are not getting a pulse rate reading and your pulse quality
indicator is weak, warm the finger or reposition to another finger.
While the GO
2
Achieve is calculating its reading immediately
after activating the device, the sensor disconnect indicator ( )
will appear. The sensor disconnect indicator also appears when
you remove your finger to indicate the pulse signal is not
detected or when there is excessive motion. If this symbol does
not turn off while your finger is in the device, reposition your
finger or switch to a different finger.
The Battery indicator symbol shows the battery strength
(the less the symbol is filled – the less battery capacity is
available – see chart below). Replace the battery when this
symbol begins to flash.
