Model 26-1 Frisker User’s Manual Section 2
Ludlum Measurements, Inc. Page 2-11 April 2017
When the Count Timer has finished:
The display will show either the accumulated total for c, d, mR, and
µSv, or the timed ratemeter average for cps, cpm, Bq, dpm, or the
average exposure or average dose in mR/h and µSv/h.
Pressing 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 accumulated total or timed ratemeter average,
depending on the newly selected Count Units.
Under a non-alarm condition, the Alarm Status LED will be off;
pressing the ON/ACK button will reset the Count Timer.
If an alarm condition occurred during the Timed Count, a
continuous audio tone will sound, and the ALARM display indicator
and the Alarm Status LED will turn on. Pressing the ON/ACK
button once will acknowledge and turn off the continuous tone
alarm audio. Pressing the ON/ACK button a second time will clear
the alarm condition and reset the Count Timer. Alarms are latching
in COUNT mode.
If other operational modes are available, pressing the MODE
button will move to the next available operational mode.
Figure 7: COUNT mode operation showing COUNT Timer of 10
minutes, 30 seconds.
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