2.2.1.4 BETA MONITORING
CAUTION
The beta window can be ruptured by sharp objects. Use
extreme care to protect the beta window when the beta
window cover is open for monitoring beta radiation.
The ADM300 is intended for beta radiation detection only. The dose rate indicated
is not accurate for beta radiation.
When monitoring for beta radiation, the unit must be hand held, and the beta
window cover must be open and pointed towards the beta radiation to allow beta
particles to enter the window of the low range detector. Only the low range detector
is capable of detecting beta particles.
Beta radiation is detected by comparing the displayed reading with the beta window
o pen to the reading with the beta window closed. If the beta window open reading
is greater, then beta radiation is present. Note: the Survey mode can be used to
derive accurate average readings for comparison.
2.2.1.4 ALPHA MONITORING
Alpha monitoring will normally be performed with the alpha probe in close
proximity to, or directly on, the surface being monitored.
2.2.1.5 X-RAY MONITORING
X-ray monitoring will normally be performed with the x-ray probe in close
proximity to the surface being monitored.
2.2.2 OPERATIONAL TEST EXPLANATION
The ADM300 is self testing and the pre-operational tests are performed
automatically by the equipment, indicating malfunctions on the display if they
occur. Note: Refer to operator maintenance, chapter 3, for malfunctions discovered
during operation.
2.2.2.1 AUTOMATIC TEST
SELF-TEST
The ADM300 is self tested continuously during operation. The tests include main
battery condition, counting and timing sequences, internal circuitry, voltage and
detectors. During power on sequencing, the ADM300 will check its RAM and
EPROM memories. A "Backup RAM error" is expected if the batteries have been
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