Troubleshooting; Self-Test Failure; High Background Readings; Erratic Readings - Fluke 481-DESI Operator's Manual

481
Operators Manual
Install fresh batteries prior to performing any calibration on this
instrument.

Troubleshooting

Self-Test Failure

If the unit fails self-test, it will remain locked on the firmware revision number. See the
How to Contact Fluke section.

High Background Readings

Remove desiccant and bake per the instructions in the Desiccant Regeneration section of
this manual. After replacement, bake unit at 50 C for 8 hours.

Erratic Readings

Check for broken ion chamber window or loose collector. Check for loose chamber bias
connector.
14
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