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5.0
Appendix
5.1
Troubleshooting
If any of the following conditions are observed:
•
Suspect water or leakage in the enclosure
•
The glass becomes scratched, cracked, chipped, or pitted.
•
A sealing fitting is sheared off or damaged
•
The door is hit by a vehicle or object
•
If you notice or suspect any damage to the unit
Do the following:
•
Clear area of all personnel and notify plant safety
•
Shut down all power to the unit at the source and lock out
•
When the area has been cleared of the hazard and plant safety has declared the area safe for workers to
enter, call your scale dealer
•
Do not attempt to restart the unit until all damaged parts have been replaced and the unit has been tested.
The most common problems are indicator incompatability, mis-wiring, and mis-programming both in the
indicator and in the EL232 XPCD setup. Double check the output of the meter and make sure something is being
transmitted. Use an oscilloscope, printer, logic probe, or voltmeter to verify that the meter is sending continuous
data. Use a logic probe to check the signal on the EL232 XPCD CPU board to see if data is actually being
received. Connect the probe as shown below.
serial data
(TTL levels)
Ground
J2
Figure 5-1. Logic Probe Location
5.2
Recommended Spare Parts
The following table consists of the recommended spare parts for EL232 XPCD, rev. 3.5 board sets.
RLWS Part Number
21036
21035
16347
16348
16445
22134
SW2
Description
Display board
CPU board
Serial transmitter chip
Serial receiver chip
Fuse .5A Slo-blo
Display lens
Table 5-1. Recommended Spare Parts List
Quantity
1
1
2
2
1
1
Appendix
21
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