Model 26-1 Frisker User’s Manual Section 7
Ludlum Measurements, Inc. Page 7-1 December 2016
Revision History
NOTE: This section of the manual will be updated with each revision of the Model
26-1 in order to document changes over time. Ludlum Measurements’ policy is to
provide free software upgrades to instruments for the life of the instrument.
April 2017: Updated Battery Life spec from 500 hours to 1000 hours.
December 2016: Added Linearity to Specification, Section 3.
October 2016: Deleted “light hysteresis” 5-9.
September 2016: Added a description for Low Light Threshold and Light
Sensor Hysteresis in Section 5, starting on page 5-9. Also added it to table on
page 5-2.
August 2016: Added a description about the headphone option in the
Introduction, page 1-2.
December 2014: Added Section 4, Gamma Energy Compensation; Added
Section 9, Maintenance and Spare Parts; added Instrument Return Form
information on page 2-1.
March 2014: Added window protective screen to Specs, updated window area
numbers.
December 2013: Deleted surface emission rate in Specs. Corrected battery
reference to AA.
November 2013: Added Battery Installation procedure & photos on page 2-2.
June 2013: Updated Efficiency Setup Parameter to reflect greater value range;
Added details to Efficiency Parameter for use with dpm/100 cm
2
or Bq/cm
2
;
Added note to each Alarm Point Parameter to explain that an Alarm Point will
be reset to 000 if the units are changed.
March 2013: Replaced NORMAL Mode with RATE Mode, Updated
maximum displayable value for mR/h, Updated order of Setup Parameters,
Sectio
7
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