Rice Lake 920i USB Installation Manual V5.05 - Manual (Page 23)

Installation 17
2.8 Battery Replacement
The lithium battery on the CPU board maintains the
real-time clock and protects data stored in the system
RAM when the indicator is not connected to AC power.
Data protected by the CPU board battery includes time
and date, truck and tare memory, onboard database
information, and setpoint configuration.
U s e i R e v 4 t o s t o r e a c o p y o f t h e i n d i c a t o r
configuration on a PC before attempting battery
r e p l a c e m e n t . I f a n y d at a i s l o s t , t h e i n d i c a t o r
configuration can be restored from the PC.
Note
Memory option card data is also protected by
a lithium battery. All database information
stored on a memory card is lost if the memory
card battery fails.
Watch for the low battery warning on the LCD display
and periodically check the battery voltage on both the
CPU board and on any installed memory option cards.
Batteries should be replaced when the indicator low
battery warning comes on, or when battery voltage falls
to 2.2 VDC. Life expectancy of the battery is ten years.
Removal (Applies to Rev H Board)
Place the tip of your finger in the notched area near the
battery retaining spring and slide the battery out of
position on the CPU board.
Figure 2-16. Battery Removal
Replacement
Before replacing the battery, place the indicator in
s e t u p m o d e , t h e n p r e s s
S AV E / E X I T t o s a v e
battery-backed memory (NVRAM) to flash. This
operation saves the latest configuration information,
including setpoint values, stored strings and data, and
the onboard database, to flash memory.
Return to weigh mode, power off the indicator, and
replace the battery. Use care not to bend the battery
retaining spring.
When power is restored, a message is shown stating
that battery-backed memory is corrupt. Press
ENTER to
restore the values saved in flash memory.
See Figure 2-8 on page 13 for CPU board battery
location and orientation (positive side up).
CAUTION
Danger of explosion if battery is
incorrectly replaced. Replace only with
the same or equivalent type
recommended by the manufacturer. Dispose of unused
batteries according to the manufacturer’s instructions.