Rice Lake EL232 XPCD Explosion Proof Remote Serial Display - Manual (Page 25)

Appendix 21
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.
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.
CL4 CL
4 CL
3 CL
3 CL
2 CL
2 CL
1 CL
1 CL
O CL
O RS
2 RS
2
J2
SW2
OPEN
1
2
3
4
RESET
serial data
(TTL levels)
Ground
RLWS Part Number Description Quantity
21036 Display board 1
21035 CPU board 1
16347 Serial transmitter chip 2
16348 Serial receiver chip 2
16445 Fuse .5A Slo-blo 1
22134 Display lens 1
Table 5-1. Recommended Spare Parts List