2.8. COUNT MODE OPERATION
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2.8 COUNT Mode Operation
When entering COUNT Mode from another operational mode, the currently selected COUNT
radiation type will be displayed for approximately one second. The purpose of COUNT mode
is to count for a predetermined amount of time, and to display the results on the display. Pre-
defined count times of 6 seconds, 30 seconds, 1 minute, 2 minutes, 5 minutes, and 10 min-
utes are available as well as a user-defined count time and continuous counting operation
(count time displayed as 0 or the minimum display). The maximum user-defined count time
is 600 seconds or 10 minutes (9:60). The maximum displayable value, regardless of units, is
999 k.
Count mode operation is very flexible, depending on the units chosen. A common choice is
for the count mode to just perform a scaler count for a specified time, with a resulting answer
in counts (equaling detected radiation events). There are three different options for COUNT
mode, which can be set through software.
Go to “Cnt Display Mode” in the Dev tab. Select the desired option:
• Timer: Will only show the countdown timer while the timer is active (default selection).
• Readings: Will only show the current gathered reading.
• Timer/Readings: Will cycle between showing the countdown timer and the current
reading.
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By default, a short press of the LOG button will start a count and automatically
log the result if datalogging is enabled. An extra-long press of the
α
−
β
button
during the count will toggle the display between the timer and reading.
Adjusting Dev Cnt Audio Mode will enable or disable the click audio during 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.
December 2021
