18
Model 915A Indicator User Manual
7.3 Indicator Lock-Up
A locked up indicator is represented by an illuminated alarm light and a display of
Error
.
1.
Shut off the alarm by pressing any key.
2.
Test the Weigh Bar
cables to isolate the source of the lock up problem, as
follows:
a. Disconnect all Weigh Bars.
b. Try to zero the indicator by pressing
GROSS
and
ZERO/CLEAR
.
l
If you are unable to zero the indicator with the Weigh Bars disconnected, the
problem is in the indicator and you should contact your supplier.
l
If you are able to zero your indicator with the Weigh Bars disconnected, then
the problem is probably in the cabling or the Weigh Bars and you should
continue troubleshooting.
3.
Reconnect all Weigh Bars. You will see
Error
displayed again.
4.
If your Weigh Bar connectors have the four-pin configuration, disconnect one
Weigh Bar and connect an adapter plug in its place.
If your Weigh Bar connectors have the five-pin configuration, disconnect one
Weigh Bar. No adapter plug is necessary.
5.
Try to zero the indicator.
Repeat Steps
4
and
5
with each Weigh Bar cable, making sure each time that
all cables are connected except the one you removed (for five-pin connector)
or replaced with an adapter plug (for four-pin connector).
A defective Weigh Bar may be easily recognized with this method — when a
defective bar is replaced with an adapter plug (for four-pin connector), or
removed (for five-pin connector), the indicator will zero properly.
7.4 Inaccurate Weight Readings
First: Visually inspect the scale system for apparent problems and improper installation:
1.
Check each cable, from source to indicator, for stress, cuts, breaks, or
abrasions.
2.
Unplug and reconnect each connector at the indicator to verify that it is tight
and making good contact.
3.
Check between supporting structure and weighing structure for debris that
might restrict Weigh Bar movement.
4.
Make sure the supporting structure and weighing structure do not touch each
other at any point except at the Weigh Bars.
Next: Compare weight readings for all Weigh Bars:
Position a person or heavy object on the platform above each Weigh Bar, one bar at a
time, and compare weight readings for the same person or same object.
