Model 2200 Scaler Ratemeter
Ludlum Measurements, Inc. Page 2 March 2016
Specifications
Meter: 1 mA, 6.4 cm (2.5 in.) scale, self-shielded DC mechanism
Ratemeter: four-decade, linear ratemeter with ranges of 0-500; 0-5000; 0-
50,000; and 0-500,000 cpm (counts per minute); 6.4 cm (2.5 in.) scale panel
meter; separate scales for battery check and high-voltage readout
Ratemeter Accuracy: within 10% of reference value
Scaler: a six-digit, LED readout
Scaler Accuracy: within 2% of reference value
Input Sensitivity: voltage-sensitive for use with all types of detectors –
proportional, GM, scintillator
High Voltage: adjustable with a 10-turn control from 200-2500 V; supports
60 megohm scintillation loads to 1500 V
Time: time base is normally in minutes from 0-999 with multiples of X0.1
and X1. (Optional: Instrument can be switched to a seconds time base by
switching the internal dipswitch SW1 “2” to the ON position. In this case,
the count time may be set to 0-999 seconds with a multiplier switch of X1
and X10.)
Timer Accuracy: time base for the scaler is crystal-controlled and has a timer
accuracy of ±0.2% of the thumbswitch setting
Response Time: in fast position, 4 seconds; in slow position, 22 seconds, for
10-90% of full-scale deflection
Input Connection: series “C” coaxial connector; other connectors are
available upon request
Line Power: 95-250 Vac, 50-60 Hz single phase
Batteries: four “D” cells with typical life of 120 hours; self-contained in the
instrument
Sectio
2
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