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Indicated Use: Low-level gamma survey with telescoping pole-mounted detector, 3.7 m (12 ft) fully extended
Working Environment: Indoor/outdoor (splashproof shields for outdoor use); environmental rating IP52
Detector: Photomultiplier coupled to a 2.5 × 2.5 cm (1 × 1 in.) NaI(Tl) crystal mounted inside the instrument housing
Counting Ranges: Two-scale meter face presenting 0 to 50 µR/hr with full-scale range positions of 5,000; 500; and 50; and 0 to 25 µR/hr with full-scale positions of 250 and 25
Linearity: Within ±10% of true value with connected detector
High Voltage: Variable from 400 to 1,500 VDC, electronically regulated to within ±1%
Angular Response: Within ±30% as detector is rotated from 0 to 90 degrees (calibration reference is with radiation field parallel to the long axis of the detector)
Geotropism: With the unit in horizontal position and display facing upward, indication will not vary more than ±2% of the full-scale reading in any orientation
Alert/Alarm: Visual and audible alarm points, adjustable
Detector Dead Time Compensation (DTC): Adjustable from 0 to 9,999 microseconds (response is reduced in pulsed fields due to DTC)
Backlight “ON” Time: 5, 15, 30, 60, 90, 120, 180, or 240 ±1 second
Headphone Jack: 0.32 cm (1/8 in.)
Power: Two “D”-cell batteries (housed in sealed handle)
Battery Life: Typically 1,000 hours with alkaline batteries (low battery indicated on display)
Construction: Aluminum housing with beige powder-coat finish; polished stainless-steel telescope assembly with brass fittings
Temperature Range: −20 to 50 °C (−4 to 122 °F); may be certified for −40 to 65 °C (−40 to 150 °F)
Size: 17.7 × 10.2 × 114 cm retracted; 396 cm fully extended (7 × 4 × 45 in. retracted; 156 in. fully extended)
Weight: 2.9 kg (6.4 lb), including batteries
