Model 3440 Appendix A–13
B
B
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t
t
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e
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r
y
y
C
C
h
h
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With fully charged batteries, the Model 3440 gauge will remain
operational for approximately eight weeks under normal (8-
hour day) conditions.
If the batteries become discharged, the following message will
be displayed on the gauge:
*** WARNING! ***
Battery Low!
When this display appears, there are a few hours
remaining before the battery must be recharged. In
an emergency, a 30-minute recharge with the dc or ac
charger gives several hours of use. If possible, run the
batteries down before recharging.
To charge the NiMH batteries:
Plug the ac charger or dc adapter into the charger connector
in the gauge’s control panel (see Control Panel on page 3–3).
If using the ac charger, plug the other end of the charger into
a standard 100–240 V ac outlet. If using the dc adapter,
connect the other end to any 12-14 V dc source (such as a
vehicle's cigarette lighter). The battery charging indicator
will light.
To ensure a full charge, allow the batteries to charge until
the battery charging indicator goes out (approximately
three hours).
After recharging the batteries, unplug the ac charger or dc
adapter and store for later use.
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