Handleiding Nokta Makro Gold Kruzer (pagina 31 van 32) (Engels)

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TARGET DEPTH

The device provides an estimated target depth according to the signal strength both

during detection and in the pinpoint mode.

Depth Indicator: It shows the target's proximity to the surface in 5 levels during detection.

Because each mode of the Gold Kruzer has different depth, the depth indicator will display

a different depth level for the same target in different modes.

In the pinpoint mode, estimated target depth is shown on the display in cms (or inches -

please see below for details) while getting closer to the target.

Depth detection is adjusted presuming that the target is 2.5cm (1'') in diameter. Actual

depth varies according to the size of the target. For instance, the detector will indicate more

depth for a target smaller than 2.5cm (1'') and less depth for a larger target. In reality,

pinpoint procedure is not intended for depth determination but exact location

determination. Therefore, it is recommended that the depth indicator on the display is used

for determining the proximity to the target.

IMPORTANT! If you want the target depth to be displayed in inches instead of cms please

do the following: While the device is off, press and hold the SETTINGS/OPTIONS and

BOOST buttons simultaneously and turn the device on. ''In'' will be displayed. To switch

back to cms, you need to turn the device off and then repeat the above procedure. While

the device is initializing, ''SI'' will be displayed.

LARGE OR NEAR-SURFACE TARGETS

Targets which are near the surface may give multiple different signals to the device. If you

suspect a target near the surface, lift the search coil and swing it more slowly until a single

signal is received. Also, if there is a large target near the surface it may cause an overload in

the search coil and the device starts to generate a continuous sound which resembles a

siren. “Overload” message is shown on the display simultaneously. In such a case, lift the

search coil up until the message disappears.

FALSE SIGNALS AND REASONS

Sometimes, the device may produce signals which are similar to a target signal although no

metal target is present. There are various reasons for the false signals received by the

device. The most common ones are ground mineralization or rocks with high mineral

content, surrounding electromagnetic signals, operation of another nearby detector,

rusted or corroded iron or foil in the soil, gain or threshold values set too high.

Surrounding electromagnetic signals can be eliminated by reducing the gain. If another

detector is operating nearby, you may attempt to shift the frequency or perform your search

at a distance where no interference occurs. For ground mineralization or hot rocks with high

mineral content, and gain and threshold set too high, please read the related sections.

MAGNETIC MINERALIZATION INDICATOR

The Magnetic Mineralization Indicator consists of 5 levels. The indicator bars do not rise at

low mineral levels during search and at start up. In areas where the magnetic mineral level

is high, the indicator bars will rise according to the intensity. This measurement can be

summarized as the level of magnetic property and intensity of the ground.

This measurement is important from two aspects. First, on grounds with high magnetic

mineralization, search depth is low and users should be aware of this fact. Second,

magnetic mineralization is a property which is particularly seen with mineralized rocks and

this measurement plays an important role for the device to eliminate the false signals

produced by these rocks.

ROCKS AND SEARCHING IN ROCKY TERRAINS (GENERAL MODE AND OTHERS)

Challenging ground conditions arise especially when conductivity and magnetic

properties of the ground are too intense. Operation of the device over such ground is made

possible by selecting the best operating mode as well as using proper ground balance,

gain, iSAT, iMASK and threshold settings.

Stones and rocks or cavities inside the ground are as important as the ground itself in

regards to the search and target detection quality.

Soil and rocks have two different properties just like the targets you are searching for. One

of them is the intensity and the other one is the conductivity - magnetic permeability ratio

and these two properties are independent from each other. In this manual, the

conductivity - magnetic permeability ratio will be referred to as ID in short. High magnetic

permeability, low conductivity results in low ID. Soil or rocks can be highly permeable and

have low or high IDs as well. If the conductivity increases relative to magnetic permeability

then the ID will also increase.

Hot rocks are classified as negative or positive based on their ID being low or high in

comparison to the ID of the soil they are in. One or both of the types may be present in a

field. The negative and positive effects mentioned here will only be valid if ground

balancing is properly done on the existing ground. Otherwise, soil itself will not act

differently from hot rocks in terms of ID. In ''TRACKING'' however, conditions will differ.

Therefore, the effects of rocks in tracking will be discussed separately. Here we are referring

to a proper ground balance without tracking.

Positive hot rocks act just like metal and produce a metal sound. In the General Search

Mode (GEN) they produce a “zip zip” sound when the search coil is moved over them. If the

signal is strong enough, the device may produce an ID for these hot rocks and the Mineral

Bar will rise. Negative hot rocks in the General Search mode, produce a long “boing” sound

when the search coil is moved over them. The device does not give an ID for these hot rocks

even if the signal is strong but the Mineral Bar will rise.

Positive hot rocks provide a typical metal sound in the other modes. Negative hot rocks do

not provide a sound in these modes (except for rare cases of false signals). The Mineral Bar

will rise in either case.

At higher settings of iSAT, there will be no change in the sounds of positive or negative hot

rocks. As the iSAT value is decreased, the sound of positive hot rocks will remain the same

but the negative hot rocks may give a thinner beep sound instead of the boing sound.

Therefore, you can make a decision by listening to the audio responses produced by the

device in the field. In the GEN mode, when the device produces an audio tone, if the mineral

bar rises at the same time, you can decide whether the target is a positive or a negative hot

rock by listening to the sound. In the other modes, if you have not changed the default

DISC. setting of the device, the device will not produce an audio tone for positive hot rocks

and if you have ground balanced, it will not emit an audio tone for negative hot rocks

anyway. If you have changed the DISC. setting of the device in these modes, when you

receive a strong signal and a stable ID, you can distinguish if the detected target is a positive

hot rock or metal by checking the ID. However, remember that weak signals may produce

different IDs and metals under rocks may produce different metal signals. Therefore, the

most appropriate action is to dig up when a metal signal is received.

Because you can encounter such a situation in gold prospecting areas where nuggets are

being searched for, it is important for you to get familiar with the hot rocks and their IDs in

your search field and pre-test the device with some nuggets.

If you are using one of the modes other than the GEN mode and you know the ID of the

surrounding hot rocks, you can use the DISC. setting to eliminate the rocks. However, this

may not be sufficient to avoid all rock signals. The device may still receive signals from rocks

because soil and rocks together will form a combined effect and generate a different ID

than those of rocks.

TRACKING AND EFFECTS OF ROCKS

When the tracking is active, the device may give an audio response and ID when it passes

over a hot rock because the effect of the rock will be different than the ground's. At the sime

time, the mineral bar will rise. If you swing the search coil over the rock, tracking will

automatically adjust the setting and the audio response/ID will either disappear or

diminish significantly. Because there is a slight delay in tracking, you may hear a strong

signal at the first one or two swings until the setting is adjusted. Then the sound will get

weaker and disappear. This will not happen with metal targets because metals will prevent

the device from ground balancing. Therefore, in tracking, if you are getting a constant

signal over a target after repeated swings, there is a high possibility that the target is a

metal. Moving from over a rock back to soil, the device may give signals to the ground for a

few swings until the ground balance setting is updated again. This is normal and should not

mislead you.

Tracking is not recommended to eliminate rocks under normal conditions. It is

recommended for use in areas with changing soil types.

METALS UNDER ROCKS

Gold Kruzer increases the possibility of detecting metal targets under mineralized rocks

through the proper adjustment of your settings. The combined effect created by the rock

and metal together is lower than the effect that the metal creates by itself and the

displayed ID will be different than the metal's expected ID. The displayed ID is formed by

the combination of rock and metal together and gets closer to the ID of the rock if the size

of the metal is smaller in relation to the rock. Keep in mind that metals under hot rocks will

never appear with their own metal ID. For instance, a gold piece under a brick may produce

an iron tone and ID.

If you eliminate hot rocks with a correctly adjusted DISC. setting in the search modes other

than GEN, you can hear the signal of the target under the rock if the target signal has a

slightly greater effect than the DISC. value. The important thing here is that if you detect a

target and dig out a rock, you should note the ID you got before digging and use it as the

DISC.value the next time.

For instance; the hot rocks in your search field tend to give IDs around 00-04. In this case,

you should set the DISC. to maximum 05. This way you can eliminate rocks and receive the

signals of metals underneath. If you set the DISC.too high unnecessarily, you will lose

metals along with rocks.

IMPORTANT! When searching in fields with hot rocks, using the E.U.D feature (page 20) is

recommended to avoid missing metals under hot rocks.

Nokta Makro Gold Kruzer Handleiding

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