• The Model 2200 is a general purpose scaler with an accompanying ratemeter, and is typically used for counting samples. Its rugged design and construction facilitate both benchtop and portable applications. The wide-ranging AC power supply and internal batteries are capable of powering the instrument upwards of 120 hours. The Model 2200 supports GM, proportional, and scintillator-type detectors, and provides fine adjustment controls for setting the high voltage and threshold settings. The scaler reading is presented on a digital, 6-digit readout LED that can be set to count from 0.1 to 999 minutes via a front-panel dip switch. An internal switch facilitates counting in seconds rather than minutes, if desired. The ratemeter is displayed on an analog meter with a readout scale of 0-500 cpm, and has range scale multiplier controls that cover four decades for an upper reading of 500 kcpm. Other front-panel controls include a start count button, an HV/Bat/Rate switch for displaying the current value on the analog meter, a fast/slow count response switch, a zero switch to reset the counts, and a three-way switch for selecting power-off, battery, or line power. An RS-232 port on the rear panel allows connection to a PC or printer as set by a rear mounted switch. When connected to a PC, the counting may be controlled and results are recorded via application software.

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