Batteries; Headphones - Fisher F4 Operating Manual

F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 5
TARGET PINPOINTING
After you have identified a target using a motion mode of detection, press
the PINPOINT pad to identify the target's exact location. This technique can
yield more information about the target's shape and size and also find its
exact location to facilitate excavation.
Pinpoint (in no-motion mode) as follows:
1. Position the searchcoil just barely off the ground, and to the side of the
target.
2. Press PINPOINT pad and raise the searchcoil about 2 inches. Lifting the
searchcoil away from the ground makes the ground signal go negative,
so the machine is silent.
3. Now move the searchcoil slowly across the target, and you can locate it
by the sound. The target is located directly under where the sound is
loudest.
Narrow It Down:
1. To narrow the response further, position the center
of the searchcoil near the center of the response
pattern, but not directly over the center.
2. Press PINPOINT pad again.
3. Repeat this narrowing procedure to narrow the field of
detection further.
Note: Depth indication is less accurate after
narrowing.
COIL DRIFT
If you plan to use the PINPOINT Mode for continuous
searching, realize that drift will occur over time, causing
the detector to gain or lose sensitivity. Periodic
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(no-motion PINPOINT Mode)
retuning of the detector is required to minimize
drift; press PINPOINT to retune.
Temperature change will cause the coil
to drift in point mode.
If the detector moves from a cooler
to a warmer environment, the
detector may emit a constant
tone until the temperature
stabilizes; if so, retune.
If the detector moves
from a warmer to a
cooler environment, the
detector may lose
sensitivity (remaining quiet);
if so, retune.

BATTERIES

Two 9-Volt batteries are
supplied with the F2.
The batteries have been inserted
backwards in the compartment
for storage during transportation.
Please remove batteries, turn them
around, and install correctly.
Use ALKALINE batteries only.
DO NOT MI X OLD AND NEW
BATTERIES.
To install the batteries:
1 Remove the battery cover by
disengaging the clip at the back.
Do not hinge door upward; pull straight
back
2 Align the polarity of the batteries
correctly, with the positive "+" toward the coil plug connection, as
indicated by the + indicator on the housing.
3 Insert (2) 9-Volt ALKALINE batteries, with the contacts pointed inward, and
press down on the back of the batteries to snap them into place.
Some brands of batteries will require moderate force to clear the
retaining tabs.
4 Replace the battery door.
Most metal detector problems are due to improperly installed batteries, or
the use of non-alkaline or discharged batteries. If the detector does not turn
on, please check the batteries.
BATTERY DISPOSAL & RECYCLING
Alkaline batteries may be disposed of in a normal waste receptacle or
recycled. Non-Alkaline batteries should be recycled. In the state of
California all battery types must be recycled. Please refer to local
municipalities for detailed disposal and recycling requirements.
USING HE DPHONES
Using headphones (not included) improves battery
life, and prevents the sounds from annoying
bystanders.
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 present. This
device is to be used with interconnecting
cables/headphone cables shorter than three meters.
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