MECHANICALS
BATTERIES
The F75 required four AA batteries.
These non-rechargeable chemistries may be used: Alkaline, Nickel Oxy-Hydroxide
(Panasonic Oxyride or Duracel PowerPix), and lithium iron disulfide (Energizer L91).
Nickel metal hydride and nickel-cadmium rechargeable chemistries may also be used.
Zinc-carbon and so-called “heavy duty” batteries may not work, especially in cold weather.
Do not use these batteries.
Expect 30 hours of service in the field with one set of alkaline batteries.
Rechargeable batteries will usually deliver over 25 hours of service without recharging, but
when they start running low, they die suddenly with little warning.
Always install batteries which are of the same type and the same state of charge.
Otherwise battery life will be determined by the weakest battery, because the good batteries
cannot deliver their power with a dead battery blocking the current.
All 4 batteries are installed with the positive terminals facing upward.
The LCD screen shows battery condition on the right.
ARM REST
The arm rest WIDTH and POSITION are both adjustable.
Arm Rest Width: The sides of the arm rest can be bent inward and outward.
To best stabilize the detector to your arm and body movement, squeeze the sides of
the arm rest around your forearm. For a very secure fit, some users prefer to bend
the arm rest in tightly against the forearm such that you pry the sides loose each time you
place your arm into the arm rest.
Arm Rest Position on Pole : Remove the two bolts to position the arm rest farther forward or back,
to adapt to your arm’s length.
-- To reinsert the bolts, spin and twist them into place. Be careful not to damage
the power cable that runs through the aluminum tube.
-- Insert both bolts completely through both sides of the bracket
before attaching the nut to the opposite side.
-- After reinserting the bolts, tighten them very securely. You may need to use
gloves for a firm grip. As you swing the detector from side-to-side, you want the
bolts tight enough so that you do not feel any movement between the pole and
arm rest mounting bracket.
If you notice unwanted movement while swinging detector, check the tightness
of the locking collars. The locking collars must be rotated a full 270° to reach the
locking position.
HEADPHONES (not included)
The F75 is equipped with a standard ¼-inch stereo headphone jack at the rear of the unit, located
under the elbow as you hold the detector for use. Any headphone with a ¼” stereo jack should
work. Mono headphones will not work.
Using headphones 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, like
rattlesnakes, are present.
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