Model 14C Survey Meter
Ludlum Measurements, Inc. Page 7 July 2022
3. Specifications
Compatible Detectors: GM, Scintillation
Meter Dial: typically 0-2 mR/hr and cpm, bat test (others available)
Ranges: rotary range multiplier switch selects multiples of ×0.1, ×1, ×10, ×100, and ×1000
Linearity: reading within 10% of true value with detector connected
Connector: series "C" (others available)
Internal Detector: energy compensated GM (used with ×1000 scale only)
Energy Response: within 15% of true value between 60 keV and 3 MeV (internal detector only)
Input Sensitivity: -40 mV ± 10 mV
Audio: built-in unimorph speaker with on/off switch (greater than 60 dB at 0.61 m [2 ft])
Response: toggle switch for FAST (4 seconds) or SLOW (22 seconds) from 10% to 90% of final
reading
Reset: pushbutton to “zero” the meter
Power: 2 each "D" cell batteries (housed in an externally accessible sealed compartment)
Battery Dependence: instrument calibration change of less than 3% within the meter face battery
check limits
Battery Life: typically greater than 2000 hours (battery condition may be checked on the meter face)
Meter: 6.4 cm (2.5 in.) arc, 1 mA analog type
Construction/Finish: cast-and-drawn aluminum with beige powder coating
Size:16.5 x 8.9 x 21.6 cm (6.5 x 3.5 x 8.5 in.) (H x W x L)
Weight: 1.6 kg (3.5 lb) with batteries; 1.2 kg (2.6 lb) without
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