Ludlum Model 2200

Scaler Ratemeter

Model 2200 Scaler front Model 2200 Scaler back Model 2200 Scaler side

The Model 2200 is a general purpose scaler with an accompanying ratemeter, and is typically used for counting samples. Its rugged design and construction allow 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.

An adjustable discriminator and an adjustable window allow the user to count pulses within a user specified energy range. This portable unit can be powered by wall current or by four "D" cell batteries. The latter allows for continued operations during power interruptions. An optional printer (Model 4167-386) is available for hard copy archival of wipe test results.

The Ludlum Model 2200 Scaler/Ratemeter is the ideal economic solution for routine sample counting, single channel analyzing and routine radiopharmaceutical related procedures, when used with the Model 243 well scintillator (Nal) detector. The well counter's 4π geometry and 1.3 cm (0.5 in.) shielding provides excellent sensitivity to higher energy isotopes like 131I.

Specifciations

Indicated Use Single channel analyzing, gross counting
Suggested Detectors GM, scintillation, proportional
Connector Series “C” (others available)
Scaler Six-digit LED display with a range of 0 to 999999 counts
Scaler Linearity Reading within 2% of true value
Timer Push-wheel adjustment from 0 to 999 minutes with selectable x0.1 and x1 multipliers
Multipliers x1, x10, x100, x1000
Ratemeter 0 to 500,000 cpm total range
Ratemeter Linearity Reading within 10% of true value
Response Toggle switch for FAST (4 seconds) or SLOW (22 seconds), from 10% to 90% of final reading
Meter Dial 0 to 500 cpm, 0 to 2.5 kV, BAT TEST
Meter 6.4 cm (2.5 in.) arc, 1 mA movement analog type
Zero Pushbutton to zero meter
High Voltage Adjustable from 200 to 2500 V (will support 60 MΩ scintillation loads)
Threshold Adjustable from 1.0 to 10.0
Window Adjustable from 0 to 10.0 above the threshold setting (can be enabled or disabled)
Discriminator Adjustable from 2 to 100 mV at threshold setting of 1.00
Data Output 9-pin RS-232 port for connection to PC for data download. A one meter RS-232 to USB adapter cable is included. PC interface software is available here.
Power 95 to 250 Vac, 50–60 Hz or 4 “D” cell batteries
Battery Life Typically 120 hours with alkaline batteries (battery condition can be checked on meter)
Temperature Range -20 to 50 °C (-4 to 122 °F)
May be certified to operate from -40 to 65 °C (-40 to 150 °F)
Size (H x W x L) 21.6 x 12.7 x 21.6 cm (8.5 x 5 x 8.5 in.) (excluding handle)
Weight 3.4 kg (7.5 lb), including battery