Ludlum Measurements 25009185, Руководство пользователя

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2.9. COUNT MODE OPERATION 23
Cnt-Audio Mode). Adjusting Dev Cnt Audio Mode will enable or disable the click audio dur-
ing a COUNT.
• Off - always off
• On - always on
• W/Count - audio is only enabled during an active count
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If a result in terms of activity is desired, the scaler count can also be in units of
"d" or disintegrations. But if the count units are chosen to be cpm or cps, then
the resulting answer is an averaged count rate over the time interval. Similarly,
if count units of Bq or dpm are chosen, the resulting answer is an averaged dis-
integration rate.
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If the user desires the instrument to show results in terms of disintegra-
tions/area (eg. dpm/100 cm
2
), then the instrument should be configured for
dpm and the appropriate factor should be placed in the Efficiency parameter.
Other choices are to have count mode units of R/h or Sv/h, in which case the COUNT mode
result is an averaged exposure or dose rate. But if count mode units of R or Sv are chosen, the
result is shown in accumulated exposure or accumulated dose over the chosen count time.
The following tables lists the possibilities:
UNITS RESULT
c counts per count time
d disintegrations per count time
cpm, cps count rate averaged over the count time
dpm, Bq disintegration rate, averaged over the count time
R/h, Sv/h exposure or dose rate, averaged over the count time
R, Sv integrated exposure or dose over the count time
Table 2.1: COUNT Mode Units and Result
In COUNT mode, operation depends on the current state of the Count Timer.
When the Count Timer is Ready:
• The display will show the Count Time.
• A short press of the UNITS button will switch between the Primary and Secondary
Count Units. The newly selected Count Units will be displayed for approximately one
second, and the display will then return to the Count Timer.
December 2021