Maintenance And Troubleshooting; Maintenance; Troubleshooting - Geokon 8032 Instruction Manual

Terminal board and 16/32-channel multiplexer

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3. MAINTENANCE AND TROUBLESHOOTING

Maintenance for the Model 8032 Multiplexer/Terminal Board is minimal. The following checks

should be performed periodically though;

 Is there water or other contaminants intruding into the enclosure? At times water can wick

through the sensor cables onto the terminal board. This will at some point cause problems with

the system. Water or other contaminants can also enter through improper use of the cable entries.

Additional sealing of the entries can be done with various sealing compounds such as RTV. If

moisture is condensing inside desiccant can be used to keep this to a minimum. Desiccant is

available from the factory.

 Are connections corroding? If the unit is installed near salt water for example, salts can form on

the terminals inside the enclosure and cause malfunctions. In this event check that the enclosure

is properly sealed. Use sealing compounds if necessary. Desiccant can also help prevent this

buildup. Sealing sprays such as HumiSeal can also help protect the connections.

 Is the earth ground connection acceptable? Check that corrosion has not built up around the

connection to the enclosure (outside or in). Disassemble, sand the connection location to remove

rust or corrosion, and reattach if necessary.

Below are some commonly experienced problems along with possible remedial action. Contact

the factory if any problem remains unresolved or additional help is required.

Symptom: A particular channel on the multiplexer appears to be malfunctioning

 Check sensor connections on the terminal board. Clean if corrosion exists.

 Try moving the sensor wired to the suspect channel to another channel to verify the

malfunctioning of the channel (as opposed to the sensor).

Symptom: No channels are working

 Inspect circuit board for shorts, opens, or other damage.

 Is moisture present on circuit board? If so, install desiccant to absorb.

Symptom: Channel selection appears to be random

 Has corrosion built up on the circuit board? Clean if necessary.

 Is there a source of electrical noise nearby? Move multiplexer or noise source if possible.

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