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M. POWER SUPPLY
M.1 PRIMARY SOURCE OF POWER
The best source of power should be determined by the planned use of
gage. For portable usage, battery power is the best choice. For station-
ary use, the battery eliminator is recommended.
M.2 BATTERY
Any of the various 9 Volt (2 contact snap-on style) batteries may be
used to power the FDV, but with a wide variation of endurance.
Battery power options include; Lithium (supplied as original equipment),
alkaline, carbon zinc or rechargeable Ni-Cad. Generally, the Lithium
battery will last twice as long as an alkaline, eight times longer than a
zinc-carbon, and ten times longer than the Ni-Cad. The shelf life of the
Lithium battery is about 5 years, so keeping a spare Lithium battery in
the FDV carrying case is recommended. However, any of the similar
9 Volt batteries may be used as a temporary backup.
M.3 CHANGING BATTERIES
The FDV will display a "Lo Bat" indicator when battery power is low.
Although a limited amount of battery life may remain when "Lo Bat" is
indicated, it is recommended that the battery be changed as soon as
possible. The FDV features easy access to the battery compartment via
a sliding door located on the front of the gage below the POWER button.
To change the battery:
1. Always turn the FDV off before disconnecting the gage from its power
source, either battery or AC power. Disconnecting the gage from its
power source while the unit is running may result in the loss of menu
and auto-calibration settings. Menu settings will also revert back to
default values if the gage is left without any power source for several
hours.
CAUTION: "LoAd" will appear on the display when the gage is first
activated if the gage has been disconnected from the battery or
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