F–10
TROUBLESHOOTING
GAUGE FAILS STANDARD COUNTS
Ensure that the source rod opening on the gauge bottom is completely
closed or covered by the tungsten sliding block. If any opening is
visible, the sliding block should be cleaned. If the sliding block still
does not close completely, contact the nearest Troxler Service Center.
NO DENSITY READING
The most likely reason for no density readings is an electronic
problem, such as a failure of the detector preamplifier. However, as a
precaution, ensure that the tip of the source rod is intact and
undamaged (that is, the source is not missing). This can be done by
checking the radiation levels at the gauge base surface with a radiation
survey meter (without extending the source rod). A maximum reading
of 10-20 mrem/hr is normal, and indicates the source is present.
However, if the maximum reading is less than 1 mrem/hr or if a survey
meter is not available, perform a visual inspection of the source rod tip
as follows to confirm its integrity:
1. Extend the source rod just far enough to see the source rod tip.
The tip should appear flat to slightly rounded and smooth.
2. Stay at least 3 ft (1 m) away from the tip of the unshielded source
rod and complete the inspection as quickly as possible to
minimize exposure (the dose rate at 3 ft from the unshielded
source is about 2.7 mrem/hr).
If the visual inspection indicates the source rod tip is broken off
(source is missing):
1. Immediately contact your Radiation Safety Officer (RSO).
2. Initiate a search for the source starting at the location where the
gauge was last used.
3. Report lost or missing radioactive sources to your state or federal
radiation control agency in accordance with applicable regulatory
requirements.
4. Contact the Troxler Radiation Safety Department for further
advice.
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