OPTIONAL BATTERY PACK OPERATION, Cont.
Discharging the Battery Pack
The battery pack is discharging when the scale is operated without the AC power cord plugged
into a wall outlet. The Battery Low annunciator on the scale keypad serves to indcate the state of
the battery pack.
When the scale is operating by battery power, and the battery pack has sufficient charge to
power the scale, the Battery Low annunciator is off. If the battery becomes discharged while the
scale is in use, the Battery Low annunciator will flash slowly to indicate the battery pack needs to
be charged. When this occurs, the battery pack will have sufficient charge to power the scale for
a short time, approximately (5) five minutes. If continued use further drains the battery pack, the
Battery Low annunciator will stop flashing and stay on until the battery pack becomes severely
discharged. When the battery pack is unable to power the scale, the scale will turn off
automatically to prevent damaging the battery.
Due to the nature of batteries, shutting the scale off will cause the battery pack to recover
slightly. If the scale is operated after turning itself off, it may run for a few minutes before the
Battery Low annunciator begins to flash again. If the battery pack is too discharged to power the
scale, it will not power up when the power switch is place in the ON position, but will illuminate
the Battery Low annunciator for one minute to show the operator that a charge is needed before
operations can continue.
If the battery pack has become severely discharged, the scale may not respond at all when
turned on. This is a safety feature to prevent the scale from being powered up when the battery
voltage is excessively low. Plug the scale into the AC wall outlet to charge the battery pack.
Charging the Battery Pack
The battery pack can be recharged with the built-in charger in the scale. The charger in the scale
is a dual-level float charger. The first level does most of the charging rapidly, while the second
level adds the remaining charge gradually. This type of charge profile greatly prolongs the life of
the battery pack. Due to the sophisticated nature of the charger the battery pack can be left
connected to the charge indefintely, without risk of damage.
When the battery pack installed in a scale needs to be charged, simply plug the AC power cord
into a wall outlet and charging will begin. Note that operating the scale during charging only
minimally affects the charge time of the battery pack. The scale can operate at a 100% duty
cycle and will only prolong the charge time by less than 20%. Note too that charge time is
dependent on the depth of the discharge and will vary from one application to the next, but will
typically not exceed 10 hours even with the scale turned on.
While the battery pack is charging, the Battery Low annunciator will flash. It will continue to flash
until the battery is fully charged. Upon reaching full charge, the annunciator will turn off. This
gives the operator a visible indication of the charging status of the battery. Note that the Battery
Low annunciator is only on when the scale is on. If the battery pack is charged with the scale off,
the scale must be turned on to determine status of the battery.
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