Model 26-1 Frisker User’s Manual Section 2
Ludlum Measurements, Inc. Page 2-10 April 2017
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, and the Alarm Status LED
will be off.
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 Count Timer.
Pressing the ON/ACK button starts the Count Timer.
If other operational modes are available, pressing the MODE
button will move to the next available operational mode.
When the Count Timer is active:
The display will show the Count Time remaining.
Pressing the ON/ACK button will reset the Count Timer.
The UNITS button is disabled.
If an alarm condition occurs, the display will alternate between the
Count Time remaining and the Count Rate. The ALARM display
indicator and the Alarm Status LEDs will turn on. Alarms are
latching in COUNT mode.
If other operational modes are available, pressing the MODE
button will cancel the current Count Timer and move to the next
available operational mode.