LUDLUM 2221 General Purpose Scaler-Ratemeter (0-999999 counts)

Indicated Use: Field Analysis

Compatible Detectors: GM, Proportional, Scintillation

Ratemeter: Provides a four-decade analog display that is operational any time the instrument is turned on. The ratemeter can also be presented on the accompanying LCD as a digital value when the LCD is switched to the "Dig. Rate"  position.

Scaler: Range from 0 to 999999 counts

Meter Dial: 0 - 500 cpm, 50 - 500k cpm logarithmic scale

(Meter Faces tab lists other available meter faces)

Digital Display: 6-digit LCD display with 1.3 cm (0.5 in.) high digits

LCD Backlight: Activated by LAMP switch

Concurrent Use: Scaler or digital ratemeter is active when not selected, allowing for concurrent use 

Timer: Switch selectable divisions of 0.1, 0.5, 1, 2, 5, 10 minutes or CONT (continuous) for manual timing

High Voltage: Adjustable from 400 to 2400 V (can be checked on display)

Threshold: Adjustable from 100 to 1000 (can be checked on display)

Window: Adjustable from 0 to 1000 above threshold setting (can be turned on or off)

Gain: Adjustable from 1.5 to 100 mV at a threshold setting of 100

Overload: Senses detector saturation, indicated by “– – – –” on LCD display and meter going to full scale (adjustable depending on detector selected)

Audio: Built-in unimorph speaker with volume control

Audio Jack: For optional headset

Power: 4 each “D” cell batteries

Battery Life: Typically 250 hours with alkaline batteries (battery condition can be checked on digital display)

Connector: Series "C" type

Size (H x W x L): 22.9 x 10.9 x 25.4 cm (9 x 4.3 x 10 in.) including handle

Weight: 2.5 kg (5.5 lb) including batteries

Datasheet

Manual