Fluke Biomedical 451B - Manual (Page 30)

451B
Operators Manual
20
Troubleshooting
Caution
For safe operation and maintenance of the Product, use caution
when working on this Product. If the device indicates a
relatively high radiation rate, there is a possibility that the
Product has been contaminated. High rates can quickly cause
the operator’s cumulative exposure to increase with the
potential for injury.
Note
Install fresh batteries prior to performing any calibration on this
product.
Self-Test Failure
If the Survey Meter fails self-test, it remains locked on the firmware revision
number. See the How to Contact Fluke section.
High Background Readings
The desiccant must be renewed and replaced periodically. See the How to
Contact Fluke section.
Erratic Readings
Check for broken ion chamber window or loose collector. Check for loose
chamber bias connector.