Model 375-Dual

Dual Channel Area Monitor Controller

Part Number: 48-2369

Features

• Dual LED Digital Display
• Low and High Alarm Indicators
• Programmable Alarm Indicators
• Optional Remote
• Detector Fail Indicators
• Battery Backup
• Data Output/RS-232

The Model 375-Dual is a dual-channel digital area monitor controller based on the legacy version of the Model 375. It consists of two Model 375 controllers in one wall-mount chassis, each with its own detector connection. A common application is gamma and neutron monitoring: one controller monitors gamma radiation and the other monitors neutron radiation. This instrument may also be used to monitor radiation in two separate locations when used in conjunction with appropriate external detectors.

Each controller features a four-digit LED display that is readable from 9 meters (30 feet) away. Backlit indicators on each instrument warn of low radiation alarm (yellow), high radiation alarm (red), instrument failure (red), and low battery (yellow). A green status light indicates the instrument is functioning properly. Calibration parameters are stored in non-volatile memory and protected under calibration covers on each controller.

Detectors are not included and must be purchased separately. See the specifications below for compatible detector types.

• Specifications
• Options
• Documents

• Specifications
• Options
• Documents

Specifications

Indicated Use	Area monitoring
Compatible Detectors	GM, proportional, scintillation, neutron
Display	2 each 4-digit LED displays with 2 cm (0.8 in.) character height
Display Range	000.0 to 9999
Display Units	Can be made to display in µR/hr, mR/hr, R/hr, µSv/h, mSv/h, Sv/h, µrem/hr, mrem/hr, rem/hr, cpm, cps, and others
Linearity	Reading within 10% of true value
Response	Typically 3 seconds from 10% to 90% of final reading
Status Indicators	Status: green light indicates instrument is functioning properly Low Alarm: yellow light (LOW ALARM) and slow beep (1 per second). Can be set at any point from 0 to 9999. High Alarm: red light (HIGH ALARM) and fast beep (4 per second). Can be set at any point from 0 to 9999. Detector Fail: red light (DET FAIL) and constant audible tone > 68 dB at 61 cm (2 ft). For conditions of detector overload, no count from detector, or instrument failure. Low Bat: yellow light (LOW BAT). Indicates less than two hours of battery life remaining. Overload: display reading of "–OL–" and audible FAIL alarm indicate detector saturation Overrange: display reading of "– – – –" and activated low and high alarms indicate that the radiation field being measured has exceeded the counting range of the instrument
High Voltage	Adjustable from 200 to 2500 V
Threshold	Adjustable from 2 to 100 mV
Dead Time	Adjustable to compensate for dead time of detector and electronics (can be read on display)
Data Output	Nine-pin connector providing five-decade logarithmic output, RS-232 output, signal ground connection, FAIL, and ALARM signals (current sink), and direct connection to battery and ground
Calibration Controls	Accessible from front of instrument (protective cover provided)
Remote Display	Can be connected to Model 271 or Model 272 remote display units (see remote display options)
Power	95 to 135 Vac (178 to 240 Vac available), 50 to 60 Hz single phase (less than 100 mA), 6-volt sealed lead acid rechargeable battery (built in)
Battery Life	Typically 18 hours in non-alarm condition Typically 5 hours in alarm condition
Battery Charger	Battery is continuously trickle-charged when instrument is connected to line power and turned on
Connector	Series "C" (others available)
Construction	Wall mount aluminum housing with ivory powder coat finish
Temperature Range	-20 to 50 °C (-4 to 122 °F) May be certified for operation from -40 to 65 °C (-40 to 150 °F)
Size (H x W x L)	18.8 x 45.2 x 6.4 cm (7.4 x 17.8 x 2.5 in.)
Weight	5.9 kg (13 lb)

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Options

Option	Description	Part Number
Model 375 Series Options	Various options are available for the Model 375 Series including: Enclosures Remote displays Alarm annunciators Signal outputs Software & networking options	Various

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Documents

• Data Sheet
• Product Manual
• Ethernet Manual Addendum (for instruments with ESP32 Ethernet board)

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