Model 26-1 Frisker User’s Manual Section 3
Ludlum Measurements, Inc. Page 3-2 April 2017
.000 to 1999 µSv/h
Backlight: built-in ambient light sensor automatically activates low-power
LED backlight, unless internal dip switch 1 is set to continuous-on.
User Controls:
ON/OFF/Quiet – press to turn ON, tap to alternate between ‘click’
audio and QUIET, hold for OFF
MODE – alternates between RATE (count rate), MAX ( captures peak
rate), and COUNT ( preset count time) modes
UNITS – alternates between Primary and Secondary units
Count Time Range: 1 second to 20 minutes, or "0" enables continuous
counting until stopped by user
Click Audio: greater than 60 dB at 0.6 m (2 ft), approximately 4.5 kHz
Power: two alkaline “AA” batteries
Battery Life: approximately 1000 hours of operation (as low as 500 hours with
backlight configured for continuous-on), 16-hour low-battery warning
Construction: high-impact plastic with water-resistant rubber seals and
separate battery compartment
Environmental Rating: NEMA (National Electrical Manufacturers
Association) rating of 3 or IP (Ingress Protection) rating of 53
Distance from Surface Plane to Grill: 0.32 cm (one-eighth inch)
Size: 4.6 x 6.9 x 27.2 cm (1.8 x 2.7 x 10.7 in.) (H x W x L)
Weight: 0.45 kg (1.0 lb)
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