5. EMI (Electromagnetic Interference)
The searchcoil produces a magnetic field and then detects changes in that
magnetic field caused by the presence of metal objects. This magnetic field
that the detector creates is also susceptible to the electromagnetic energy
produced by other electronic devices. Power lines, microwave ovens,
lighting fixtures, TVs, computers, motors, etc…. all produce EMI which can
interfere with the detector and cause it to beep when no metal is present,
and sometimes to beep erratically.
The SENSITIVITY control lets you reduce the strength of this magnetic field,
and therefore lessen its susceptibility to EMI. You may want to operate at
maximum strength, but the presence of EMI may make this impossible, so if
you experience erratic behavior or “false” signals, reduce the sensitivity.
THE BASICS OF METAL DETECTING (continued)
9
MENU SELECTIONS
(cont.)
2. DISC. LEVEL
Use
and
to increase or decrease DISCRIMINATION level.
Each time you press
, a target category is eliminated from detection.
Elimination occurs from left to right. When a category description (for example
“IRON”) disappears from the display, then targets classified in that category
will not be detected.
Pressing
reverses the discrimination process. With each press of
, a category description will reappear, indicating that targets
classified in that category will again be detected.
Discrimination is a cumulative elimination system. Targets can be eliminated
from left to right on the scale, with each additional press of
, resulting in
more objects being eliminated from detection.
3. NOTCH
Use
and
to notch target categories IN or OUT while the NOTCH
line is highlighted.
Whereas the discrimination feature eliminates all categories sequentially from
detection, the NOTCH control allows you to selectively include or exclude
target categories from detection.
With each press of
or
, the notched category moves across the
display screen. As you move the position of the notched category, you are
changing the detection status of the selected category.
• If a target category was previously eliminated (word not visible) then
notching that category will return it to detection.
• If a target category was previously retained (word is visible) then
notching that category will remove it from detection.
Only one target category at a time can be selected for notching. To notch multiple
categories in or out, wait for the icon to stop flashing and then press
or
again to select the next notch.
12
Each time you press
to select notch, followed by
, the notch
program will begin by changing the status of the IRON segment.
OPERATION and CONTROLS (continued)
HEADPHONE JACKS
The detector has both a 1/8” & 1/4” headphone jack on the left side of the
housing.
Optional Headphones come standard with a 1/4” stereo plug (the 1/8”
adapter is not required).
When the headphone jack is connected, speaker audio is disabled..
USING HEADPHONES
Using a detector with headphones facilitates detection of the weakest sig-
nals and also extends the battery life.
It also allows you to hear subtle changes
in the sound more clearly, particularly if
searching in a noisy location. For safety
reasons, do not use headphones near
traffic or where other dangers are pres-
ent. This device is to be used with inter-
connecting cables/headphone cables
shorter than three meters.
Headphone
Jacks
