Geokon 8600-2 Instruction Manual page 14

6
Symptom: The Datalogger will not operate on external power:
The external voltage supply is below operating limits. If the external source is a battery,
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charge it. If it is a power supply, check the output with a voltmeter.
Verify both Load and Charger Fuses on Power Distribution Board (Refer to Section 4.5).
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Symptom: Loss of Micro-6000 program and/or data:
The system has experienced a voltage dropout or surge which disrupted operations.
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The surge originated as a result of lightning. Install appropriate grounding. Install
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lightning protection devices on all incoming and outgoing lines (consult factory).
Verify .CR6 Program is running on the Datalogger (See Appendix E).
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Symptom: Sensor readings show "NAN" or are unstable:
The wrong sensor type has been connected. Check the model number of the sensor
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against the requested sensor list.
The cable(s) to the sensor(s) have been damaged permitting moisture and debris to enter
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the jacket. Wires may be shorted together. Inspect the cable and perform Ohm test to check for
short circuits.
If all sensors on a particular Multiplexer are erratic or returning "NAN" perhaps the
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Multiplexer or cable has been damaged. Inspect the cable. Try another cable to verify proper
functioning.
The sensor(s) have been damaged. For example, overrange on a vibrating wire sensor can
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cause erratic readings.
There is an electrical noise source nearby. Move the sensor, cables, and Datalogger away
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from the noise source. Install grounding devices. Consult the factory.