Model 3 General Purpose Survey Meter

Application	Alpha, Beta, and Gamma surveying
Compatible Detectors	GM, Scintillation
Detection Range	Dependent on detector
Linearity	Reading within 10% of true value with detector connected
Meter Dial	0 – 2 mR/hr, or 0 – 500 kcpm, BAT TEST (Meter Faces tab lists other available meter faces)
Meter	6.4 cm (2.5 in.) arc, 1 mA analog type
	Rotary Selector Switch	Switches between: Instrument off; Battery check; Ranges: x0.1, x1, x10, x100
	Response Switch	Toggles between FAST (4 s) or SLOW (22 s) from 10% to 90% of final reading
Controls	Reset Pushbutton	Zeroes meter
	Audio Switch	Audio on/off, built-in unimorph speaker, greater than 60 dB at 0.6 meters (2 ft.)
	Calibration Controls	Accessible from front of instrument (protective cover provided)
High Voltage	Adjustable from 400 to 1500 Vdc
Threshold	Fixed at -35 mV ± 10 mV
Temperature Range	-20 to 50 °C (-4 to 122 °F) May be certified for operation from -40 to 65 °C (-40 to 150 °F)
Power	Two each “D” cell batteries housed in externally accessible sealed compartment
Battery Life	Typically greater than 2000 hours with alkaline batteries (battery condition can be checked on meter)
Construction	Cast and drawn aluminum with beige powder coat
Connector	Series “C” (others available)
Size (H x W x L)	16.5 x 8.9 x 21.6 cm (6.5 x 3.5 x 8.5 in.), including handle
Weight	1.6 kg (3.5 lb), including batteries