Model 26-1 Frisker User’s Manual Section 5
Ludlum Measurements, Inc. Page 5-9 April 2017
The Model 26-1 also utilizes a Step function in Auto Response mode, which
enables faster response to a significant increase or decrease in Count Rate. When
the instrument detects a sudden change in count rate from the detector, the
response time is reduced to 1 second to quickly show the new value.
Operational Modes (Default 0=all modes available) - Use MODE to adjust
the value. Available values are:
0 – RATE, MAX, and COUNT Modes
1 – RATE and MAX Modes only
2 – RATE and COUNT Modes only
3 – RATE Mode only
Count Time (Default 1 minute) - Use ON/ACK to select the value to adjust,
and MODE to adjust the value. Setting Count Time to 0 enables continuous
count until reset. If 19 minutes are selected, then the maximum seconds value is
60; otherwise, the maximum seconds value is 59. Available values are:
Ones Place (0-9)
Tens Place (0-6, 6 only available if minutes value is 19)
Hundreds Place (0-9)
Thousands Place (1 on or off)
Low Light Threshold (Default 55) - Use ON/ACK to select the value to
adjust, and MODE to adjust the value. Available values are:
Ones Place (0-9)
Tens Place (0-9)
Hundreds Place (0-9)
NOTE: If no buttons are pressed for four seconds, the Model 26-1 will switch
to the next parameter, and if on the last parameter, will save the parameters and
exit Setup mode, returning to RATE mode operation. The UNITS button can be
used to advance to the next parameter. To end Setup mode and save the current
setting, press and hold the UNITS button for approximately 5 seconds.
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