Model 177 Ratemeter

Model 177 Alarm Ratemeter

4 Ranges
Adjustable Alarm
Utilizes G-M and Scintillation Detectors
Battery Back-up
Pulse Output
Recorder Output
Total Counting Range from 0 - 500,000 cpm

PART NUMBER:48-1632

INDICATED USE: Multi-purpose radiation monitoring; frisking
COMPATIBLE DETECTORS: G-M, scintillation
METER DIAL: 0 - 500 cpm, 0 - 1.5 kV, BAT TEST (others available )
MULTIPLIERS: X1, X10, X100, X1k
LINEARITY: Reading within plus or minus 10% of true value with detector connected
CONNECTOR: Series "C" (others available )
AUDIO: Built in unimorph speaker with volume control (greater than 60 dB at 2 feet full volume )
ALARM: Indicated by a red lamp and full volume audible tone
DATA OUT: 9 pin series "D" connector allowing for external connections of the following items: battery; unregulated supply; instrument common ground; alarm signal (current sink); pulse out; external background subtract; and recorder output.
RECORDER OUTPUT: Correlated to meter reading (adjustable to 1 volt at 1 mA)
CALIBRATION CONTROLS: Accessible from back of instrument (protective cover provided )
HIGH VOLTAGE: Adjustable from 200 - 1500 volts (can be read on meter )
THRESHOLD: Adjustable from 10 - 100 mV
RESPONSE: Toggle switch for FAST (4 seconds) or SLOW (22 seconds) from 10% to 90% of final reading
RESET: Push-button to zero meter
POWER: 95 - 135 VAC (178 - 240 VAC available), 50 - 60 Hz single phase (less than 100 mA), 6 volt sealed lead acid rechargeable battery (built in)
BATTERY LIFE: Typically 50 hours (battery condition can be checked on meter )
BATTERY CHARGER: Battery is continuously trickle charged when instrument is connected to line power and turned on (optional external fast charger is available)
METER: 2.5" (6.4 cm) arc, 1 mA analog type
CONSTRUCTION: Cast and drawn aluminum with beige polyurethane enamel paint
TEMPERATURE RANGE: -4° F(-20° C) to 122° F(50° C)
May be certified for operation from -40° F(-40° C) to 150° F(65° C)
SIZE: 5" (12.7 cm)H X 8" (20.3 cm)W X 6" (15.2 cm)L
WEIGHT: 4.2 lbs (1.9 kg)

*For Mylar window scintillators it is strongly suggested that the optional overload indicator be used to better determine the presence of a light leak.

Common Meter Dials


202-096 0 - 500 cpm; 0 - 1.5 kV For Any Detector	202-642 0-660 cpm; 0-0.2 mR/hr For Model 44-9; 44-40; 44-88; 44-89; 44-94	202-704 0-660 cpm; 0-2 mSv/h For Model 44-9; 44-40; 44-88; 44-89; 44-94


202-420 0-420 cpm; 0-0.2 mR/hr For Model 44-7	202-861 0-420 cpm; 0-2 mSv/h For Model 44-7	202-698 0-0.5 mR/hr For Model 44-2