Tuning; Searching; On Land Or Shallow Water - Fisher Impulse Operating Manual

TUNING

Tuning your IMPULSE is a simple but necessary step before
beginning your search. If you're hunting underwater, the
following steps should be performed underwater.
1. Hold the coil up and away
from any metal.
2. Set the tuner full counter
clockwise, just before it clicks
into the "BATT TEST" position.
3. Set the VOLUME control
knob to "10."
4. Hold the search coil 1 to 2
inches above the ground and
adjust the TUNER control knob
until the audio tone can just
barely be heard (usually one
or two bars on the LCD). Then
fine-tune it just a little bit louder than a faint tone (usually
about two bars).
5. Readjust the volume control to a comfortable level
when the search coil is passed over a large target.
6. You've now tuned your IMPULSE to its proper
"threshold tone" and you're ready to begin searching.
When you move from dry sand to wet sand, or as
ground mineralization or temperature changes, you will
have to readjust your tuner slightly to maintain your
threshold setting.

SEARCHING

FOR LAND OR SHALLOW WATER
Using good search techniques is every bit as important as having
a good detector.
1. Make sure your IMPULSE is properly tuned (see
Tuning, above ) and the VOLUME control is adjusted
before beginning your search.
2. Begin by walking slowly, keeping the search coil
as close to the ground as possible.
The TUNER control Knob
must be adjusted before
starting your search
10