Controls; Sensitivity Control; Sensitivity Adjustment - White's GARRETT GOLDMASTER 24k User Manual

GM24k Controls

Controls

1. The UP and DOWN buttons control the SENSITIVITY. Each press on the UP button increases from a
minimum level of "0" to a maximum level of "10". Please note that levels 0-9 adjust the system gain, and
that setting 10 enables an Audio Boost for maximum sensitivity.
2. Average ground conditions will generally allow for settings of 5-7 on the SENSITIVITY setting. In mild
ground you may be able to run as high as 10. In extreme ground, you may need to lower the sensitivity
to under 5. If the GM24k overloads, your sensitivity is set too high.
3. One way to look at the SENSITIVITY control is like the accelerator in your car. Sometimes you have to
ease off for better control, and other times you can go "full throttle" for maximum performance.
8
Garrett Metal Detectors

Sensitivity Control

With the SENSITIVITY control, you increase the
signal strength coming from the ground. You might
expect increased signal strength to always find more
nuggets at greater depths. However, high ground
Current
mineralization will "bounce" the signal back and
mask good targets. Therefore, adjust SENSITIVITY
Sensitivity
to give the maximum allowable sensitivity without
Level
masking targets or overloading the circuit. At the
same time, this allows you to operate the detector
with a constant threshold hum so that faint signals
can be detected.
This is where the GM24k can help you out. When
ground mineralization is too high for the current
SENSITIVITY control setting, the display shows
Sensitivity
you a series of lines along with an audible "alert".
Increase
Reduce the SENSITIVITY until the overload warn-
ing ceases. On occasion, while searching, you might
go over a very large or very shallow target. This will
result in the same type of behaviour. Lifting the coil
Sensitivity
higher may reveal some information on the target.
You still might want to dig it up!
Decrease

Sensitivity Adjustment