Fluke Biomedical 06-526 - Manual (Page 18)

Nuclear Associates 06-526 & 06-526-2200
Operators Manual
2-10
2.10 Sources of error
If an incorrect measurement is suspected, check the items listed below as they are potential sources of
error:
1. Low battery voltage.
2. Failure to properly zero the unit before/between measurements.
3. Uncorrected drift error over long exposure times.
4. Unusual atmospheric conditions requiring a correction factor.
5. External low energy backscatter.
6. Capacitive effects (see precautions).
7. Static discharge (see precautions).
8. If using the remote detector, a damaged cable or connector.
9. Operating the unit beyond specified limits of temperature, x-ray energy, etc.
2.11 Precautions
Due to the high voltage inside the ion chamber and
its delicate nature, puncturing or removing the
chamber cover may result in damage to the unit or
a change in calibration.
If a large amount of static electricity is present,
small to moderate absolute errors may occur as a
result of touching the exposed window. This is
most likely to occur when the ambient humidity is
very low.
Because of the highly sensitive nature of the
electrometer input circuit, changing the position of
the instrument can cause small changes in the
reading due to capacitive effects. This is a
reversible error and can be corrected by returning
the unit to its original position or manually resetting
the unit.
CAUTION
CAUTION
CAUTION