18
Uninterruptible Power Supply Instructions
Installing the UPS
Make sure that you mount the UPS on the same metal surface as
the DC-DC converter so that it has good heat transfer and
airflow around it. Intermec also recommends that you mount the
UPS away from other heat sources. The installation location is
important as excessive heat is a primary cause of battery failure.
The mounting location should allow visibility of the status LED
and easy access to the battery compartment.
After the UPS is installed onto a lift truck, the pull tab (if
present) should be removed. Input power to the UPS must be
present for at least four hours prior to any attempt to rely on the
UPS as a source of backup power. This allows the battery to
charge properly. Failure to allow for a full charge may result in the
computer terminal turning off before the lift truck battery is
replaced.
Operating the UPS
Allow a newly installed UPS unit to charge on the lift truck for
four hours prior to using. This allows the battery to charge
adequately. When the main power to the UPS is removed, the
internal battery allows the computer terminal to run for 15
minutes or more. Actual run time varies depending on the
terminal features that are activated, age of the battery, and the
care given to it.
New lead acid batteries are formed during the first few cycles of
use. Therefore, the initial 3 to 4 times that it is powered from its
internal battery, the UPS run time may be shortened by up to
several minutes.
The number of times a UPS unit can be used (battery cycle life)
for lift battery changes is dependent on a number of factors:
Note:
The UPS should always be mounted so that the
lid (battery cover) is oriented above the body of the
device. (When the lid surface is level or has an angle
up to 30 degrees with respect to the horizontal axis,
this is considered acceptable.) This mounting
orientation is needed should the battery ever go into a
venting condition. If this should occur, any battery
leakage would be contained by the UPS.
