Fisher Labs F4 Operating Manual page 5

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BATTERIES
T
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o
9
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V
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9
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The batteries have been
inserted backwards in the
compartment for storage
during transportation.
Please remove batteries,
turn them around, and install
correctly.
A
L
K
A
L
I
N
E
Use A
L
K
A
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N
E
batteries
only.
DO NOT MI X OLD AND
NEW BATTERIES.
To install the batteries:
1
1
Remove the battery cover
by disengaging the clip at the
back.
D
o
n
o
t
h
i
n
g
D
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n
o
t
h
i
n
g
straight back
2
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
3
Insert (2) 9-Volt A
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
4
Replace the battery door.
Most metal detector problems are due to improperly installed
batteries, or the use of non-alkaline or discharged batteries. I
d
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USING HEADPHONES
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 shorter than three meters.
t
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F
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A
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A
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L
K
A
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I
N
E
batteries, with the contacts pointed inward,
n
o
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n
,
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n
o
n
,
p
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cables/headphone
; pull
a
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.
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.
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5
5

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