OPERATING TECHNIQUES
21
Setting the Sensitivity Level
In lightly to moderately mineralized ground, you can usually set the SENSITIVITY
control as high as 6-7. In some conditions, you can even move the control into the 8-9
range for improved depth.
To adjust the Sensitivity Level to your search conditions, first set the operating mode
to DISC and turn the SENSITIVITY control clockwise as far as possible until the
detector just begins to "chirp" intermittently. If the chirping is too frequent, simply turn
the control counterclockwise just enough to cause the chirping to subside. Once set, this
control should not require readjusting unless site conditions change.
Occasionally, you may need to reduce the setting to eliminate "false signals" caused
by difficult conditions such as highly mineralized ground on trashy sites or nearby
sources of electrical interference. These false signals are generally short, choppy sounds
that can be easily distinguished from a good target response sound. Extreme conditions
such as wet salt sand may require you to lower your Sensitivity setting into the 2-5 range.
Setting the Discrimination Level
The DISC LEVEL control is used to adjust the detector's response to unwanted trash
metal when operating in the Discriminate Mode. At the lowest setting (MIN), the detector
will ignore most iron objects, but will still respond to light foil, bottle caps, pull-tabs and
most other metal objects. As the Discrimination Level is increased, more of these trash
metal objects are ignored and give no target response sound when inside the searchcoil's
range.
The DISC LEVEL should be set to your desired "rejection level" for the particular
area you are searching. We recommend starting at a low setting if you are unsure of how
much trash is in the area. Adjust the level higher if you find yourself digging more trash
than you like. Remember that with any metal detector, you will lose target response to
small gold rings and nickels when discrimination is set at the pull-tab rejection level. So,
digging some trash will increase your number of good finds.