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Ludlum Model 3A|
Introduction |
● Alpha, Beta and Gamma Radiation
Surveying
● Supports GM and Scintillation Radiation Detectors
● 4 Decade Analog Meter
● Greater Than 2000 Hour Battery Life
● Rugged, Low Cost
● Alarms
The Model 3A is identical to Ludlum's best selling Model 3 general purpose, handheld analog radiation survey meter with the addition of a red alarm lamp and an audible alarm. The Model 3A is likewise known for accuracy and long-lasting dependability. The analog meter comes in a variety of measurement ranges and units to support the external radiation detector selected. The aluminum cast 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 the four-decade range, instrument shut-off, battery test, an audio on/off switch, a fast/slow response switch, and a count reset button. A 39 in. straight type detector cable with "C" style connector is included in the price of the instrument.
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Specifications |
PART NUMBER: 48-1408
APPLICATION:
alpha, beta, and gamma radiation surveying
DETECTION RANGE: dependent on detector
COMPATIBLE RADIATION DETECTORS:
GM, scintillation
LINEARITY:
reading within 10% of true value with detector
connected
HIGH VOLTAGE:
adjustable from 400-1500 Vdc
THRESHOLD:
fixed at 40 mV ± 10 mV
METER FACE:
0-2 mR/hr, or 0-500 kcpm, BAT TEST
(others available)
METER:
2.5 in. (6.4 cm) arc, 1 mA analog type
ALARM: indicated by red lamp on front panel and audio going to
constant tone. The alarm circuit on the Model 3A is triggered by
meter deflection.
(see Model 3 for version without alarm)
CONTROLS:
Rotary Selector: switches between instrument off, battery check, ranges: x0.1, x1, x10, x100
Response Switch: toggles between FAST (4 s) or SLOW (22 s) from 10% to 90% of final reading
Reset Pushbutton: to zero meter
Audio Switch: for audio on/off, built-in unimorph speaker, greater than 60 dB at 2 ft (0.6 m)
Calibration Controls: accessible from front of instrument (protective cover provided)
CONSTRUCTION:
cast and drawn aluminum with beige powder coat
CONNECTOR:
series
“C”
(others
available)
TEMPERATURE RANGE:
-4 to 122 °F (-20 to 50 °C), may be certified for -40 to 150 °F (-40
to 65 °C)
POWER: two each “D” cell batteries
(housed in externally accessible sealed compartment)
BATTERY LIFE:
typically greater than 2000 hours with alkaline batteries (battery
check on meter)
SIZE:
6.5 x 3.5 x 8.5 in. (16.5 x 8.9 x 21.6 cm) (H x W x L), including
handle
WEIGHT:
3.5 lb (1.6 kg) including batteries
CE CERTIFIED: yes
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Technical Information |
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