Batteries (Use Alkaline Batteries) - Fisher F44 Owner's Manual

GROUND CANCELATION
When using a metal detector the
Ground Balance Error Indicator
Ground Phase conditions can change
from location to location and even within
smaller areas only yards apart.
Performance can suffer if the detector is
not ground balanced properly so it is
important to know when the conditions
have changed.
The Ground Balance Error arrows will
show the user when to rebalance the
detector; the downward pointing arrow
icon will illuminate and blink when the
ground phase condition is lower than the
ground balance setting, and the upward
pointing arrow icon will illuminate and blink when the ground phase condition is
higher than the ground balance setting. When these conditions occur you
should rebalance the detector.
Refer to the GROUND section, (page 14), on how to manually adjust the
detector's internal Ground setting.
selections, perform the coil pumping described above, and listen to the audio
sounds.
If the Ground setting is incorrect, there will be a difference in the sound as the
searchcoil is either moving toward or away from the ground. It sounds like you
are either pulling the sound out of the ground, or pushing the sound into the
ground.
• If the sound gets louder as you raise the searchcoil, increase
• If the sound gets louder as you lower the searchcoil, reduce
Repeat this process of adjusting until there is no sound as you lower or raise the coil.
NOTE: Experienced users often prefer to adjust the Ground setting to get a
weak but audible response when lowering the searchcoil. This is called
"adjusting for positive response".
Fe O BAR GRAPH
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The Fe O 4-segment bar graph indicates the amount of ground mineralization,
independent of type, expressed as an equivalent volume concentration of
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magnetite (Fe O ). It updates every second. It is sensitive to motion and will give
the most accurate readings if you "pump" the searchcoil up and down several
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times over the ground. The presence of metal or "hot rocks" will cause the readings
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Continued)
UP ARROW: DOWN ARROW:
Blinking means Blinking means
ground phase ground phase
value has value has
increased above dropped below
ground balance
ground balance
set point. set point.
After selecting Ground in the Menu
the Ground setting.
the Ground setting.
BATTERIES
The detector requires two AA batteries.
We recommend ALKALINE batteries
(not included).
Do not use ordinary "Zinc
Carbon" batteries.
Do not use "Heavy Duty" batteries.
Rechargeable batteries can also be
used. If you use rechargeables, we
recommend using a "Nickel Metal
Hydride" rechargeable battery. The
battery compartment is located on
the right side of the Control Housing.
Both batteries should be installed with
the negative terminal down.
Remove battery tube:
1. Slide the battery door off.
2. Extend the handle on the battery tube (with your finger or by using the tab
3. Pull on the handle to remove (do not use the battery door tab to pull the tube
on the battery door to pry the handle into the extended position)
To install battery tube:
out of the control housing, as this may cause damage to the battery door)
1. Position the handle on the battery tube in the lowered position.
2. Firmly push down on the battery tube, until the battery tube handle is
flushed with the housing. (The battery tube will only insert one way, with the
brass contacts facing towards the display and the hinged side of the handle
towards the back.)
Expect 25 to 30 hours of life from 2 AA Alkaline batteries. Rechargeable
B TTERY LIFE
batteries provide about 15 hours of usage per charge. Backlight increases
power consumption and decreases battery life, with significant power drain at
maximum brightness.
The battery icon has three segments plus an outline segment. The amount of
B TTERY INDIC TOR
battery voltage for two ALKALINE batteries is indicated as follows:
All segments black: >2.8 volts
Right segment grey, other two black: >2.6 volts
Right segment off, other two black: >2.4 volts
Right segment off, mid grey, left black: >2.2 volts
Right and mid segments off, left black: >2.0 volts
Right and mid segments off, left grey: >1.8 volts
All segments off, outline flashing: < 1.8 volts
It is recommended to change the batteries when you see the one black segment.
You may notice the speaker volume drop while one battery segment is
SPE KER VOLUME ND B TTERY CH RGE
illuminated. With the outline flashing, low speaker volume will be very apparent.
Alkaline batteries may be disposed of in a normal waste receptacle or
B TTERY DISPOS L & RECYCLING
recycled. Other battery chemistries should be recycled.
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