Model 3000 Survey meter User’s Manual Section 3
Ludlum Measurements, Inc. Page 3-2 April 2021
Backlight: built-in ambient light sensor automatically activates low-power
LED backlight, unless internal dip switch is set to continuous-on (will reduce
battery life)
User Controls:
ON/OFF/ACK – long press to turn ON, tap to acknowledge alarms
and silence alarm tone, long press to reset Sigma Audio alarm, long
press to reset Rate, hold for OFF
MODE – alternates between RATE (count rate), MAX ( captures peak
rate), and COUNT ( user-selectable preset count time from 0 to 10
minutes)
AUDIO – turn “click” audio on/off, turn Sigma Audio beep on/off
UNITS – changes the units from count rate (cpm, cps) to
dose/exposure (µSv/h, mR/h) or disintegration (dpm/Bq)
Response Time: user-selectable from 1 to 60 seconds, or auto-response rate
FAST or SLOW
Audio click audio greater than 65 dB at 0.6 m (2 ft), alarm audio at greater than
72 dB, approximately 4.5 kHz
Power: four alkaline “AA” batteries
Battery Life: approximately 750 hours of operation (as low as 100 hours with
backlight configured for continuous-on), 16-hour low-battery warning
Maximum Current: 35 mAdc
Construction: high-impact plastic with water-resistant rubber seals and
separate battery compartment
Temperature Range: -20 to 50 ˚C (-5 to 122 ˚F), may be certified for
operation from -40 to 65 ˚C (-40 to 150 ˚F)
Environmental Rating: NEMA (National Electrical Manufacturers
Association) rating of 5 or IP (Ingress Protection) rating of 53
Size: 16.5 x 11.4 x 21.6 cm (6.5 x 4.5 x 8.5 in.) (H x W x L)
Weight: 0.9 kg (2.0 lb)
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