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Part Number: 481

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Modes

Integrate Mode: Operates continuously 30 seconds after the instrument has been turned on. Integration is performed even if the instrument is displaying in mR/h or R/h
Freeze Mode: Will place a tick mark on the bar graph display to hold on the peak displayed value. The unit will continue to read and display current radiation values

General Specifications

Detector: Beta slide 440 mg/cm²
Battery Life: Four+ hours continuous use per battery pack (assumes 50% brightness of LCD)
Automatic Features: Auto-zeroing, auto-ranging, and auto-backlight
Radiation Detected: Beta > 100 keV
Detector: Chamber window (mylar) 6.6 mg/cm²
Radiation Detected: Gamma > 7 keV
Weight: 1.11 kg (2.5 lb)
Warm-up Time: One minute
Accuracy: Within 10% of readings between 10% and 100% of full scale indication on any range, exclusive of energy response
Detector: Chamber wall (phenolic) 246 mg/cm²
Dimensions (W x D x H): 10 x 20 x 15 cm (4 x 8 x 6 in)
Operating Ranges: 0 mR/h to 5 mR/h (8 sec) 0 mR/h to 50 mR/h (2.5 sec) 0 mR/h to 500 mR/h (2 sec) 0 R/h to 5 R/h (2 sec) 0 R/h to 50 R/h (2 sec)
Detector: Chamber (cc volume air ionization) 349 cc
Power Requirements: Two 9 V alkaline, 200 hours operation

Display LCD Analog/Digital With Backlight

Analog: 100 element bar graph 6.4 cm long. Bar graph is divided into 5 major segments, each labeled with the appropriate value for the range of the instrument
Digital: 2.5 digit display is followed by a significant zero digit depending on the operating range of the instrument. The units of measurement are indicated on the display at all times. Digits are 6.4 mm (0.25 in) high. Low battery and freeze indicators are also provided on the display

Environmental

Geotropism: < 1%
Temperature Range: -4°F to 122°F
Relative Humidity: 0% to 100% (at 140°F)

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