LUDLUM 3 General Purpose Survey Meter (GM, Scintillation)

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

Controls: 

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

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 -30 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

Datasheet

Manual