Rice Lake 920i Installation Manual V4.01 - Manual (Page 22)

16 920i Installation Manual
2.8 Fuse Replacement
Fuses for the universal and deep enclosure models of
the
920i are located under a cover plate on the outside
of the enclosure. Remove the cover plate, replace the
fuses, and reinstall the cover plate (see Figure 2-14).
To protect against the risk of fire, replace
fuses only with same type and rating fuse.
See Section 10.14 on page 127 for
complete fuse specifications.
Interface board and fuse access cover
plates must be in place for use in NEMA
4X/IP66 applications.
l
T orque fuse and interface board access covers to
8 in-lb (0.90 N-m)
Fuses
F1 & F2
Interface Board
Figure 2-14. Interface Board and Fuse Locations,
Universal Model
2.9 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
replacement. If any data is lost, the indicator
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 2-15. 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 re 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 2-6 on page 12 for CPU board battery
location and orientation (positive side up).
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.