Model 2242

Gamma Exposure Scaler-Ratemeter

Part Number: 48-3437

Features

• Range: 0.1 mR/hr to 999.9 R/hr
• Dual Energy Compensated GM Detectors
• Splashproof
• Rugged
• 7-Decade Digital Ratemeter
• RS-232 Port with Data Streaming

The Model 2242 is a gamma exposure digital ratemeter equipped with two internally-housed, energy-compensated GM detectors that measure over the range of 0.1 mR/hr to 999.9 R/hr. The backlit LCD presents a four-digit measurement value along with units that can be set up for R, Sv, or Counts, and includes icons for alarms and operational status.

The cast aluminum instrument housing with its separate battery compartment and accompanying metal handle offer an industrial robustness and quality that promote long-lasting protection and instrument life. The front-panel controls include a rotary switch for selecting between the mR/hr and R/hr ranges and instrument shut-off, an audio on/off switch, a fast/slow response switch, and a count reset push-button. Any alert or alarm setpoints exceeded will activate the audio and indicating lamp. The reset button is also used to acknowledge alarms. This instrument is a complete turn-key system including the two "D"cell batteries.

• Specifications
• Options
• Documents

• Specifications
• Options
• Documents

Specifications

Indicated Use	Hazard assessment, Emergency response
Detector	2 ea. internal energy compensated GM tubes
Sensitivity	1000 cpm per mR/hr & 17 cpm per mR/hr
Energy Response	Within 15% of true value from 60 keV to 3 MeV
Meter	4-digit LCD display with 1.3 cm (0.5 in.) high digits, separate annunciators for display units, alert, alarm, low battery, detector overload
Display Range	0.1 mR/hr to 999.9 R/hr
Backlight	Pushbutton to activate
Range Switch	LOW (mR/hr), HIGH (R/hr)
Reset	Pushbutton to zero meter
Calibration Controls	Some are accessible from the front of the instrument, others are internally located
Overload Protection	Included, indicated by message on display
Alert/Alarm	Indicated by annunciators on display and audible tone
RS-232 Port	Outputs data every 2 seconds, can also be used to calibrate via optional software
Audio	Built-in unimorph type speaker with ON/OFF switch
Temperature Range	-30 to 50 °C (-22 to 122 °F)
Working Environment	Splashproof for outdoor use
Power	2 "D" cell batteries (housed in sealed compartment that is externally accessible)
Battery Life	Typically 200 hours with alkaline batteries, low battery indicated on display
Size (H x W x L)	16.5 x 8.9 x 21.6 cm (6.5 x 3.5 x 8.5 in.)
Weight	1.6 kg (3.5 lb), including batteries

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Options

Option	Description	Part Number
Lighted Handle	Handle with LED to illuminate the instrument display.	4464-154
Shoulder Strap	Adjustable nylon shoulder strap.	4363-413
Headphone Jack	Adds headphone jack to instrument.	4464-464
Stereo/Mono Headphones	Adjustable stereo/mono headphones.	22-9313
Plastic Disk Check Sources	General purpose check sources used to check instrument response.	Depends on source material and activity.

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Documents

• Data Sheet
• Product Manual
• CE Certificate

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