Atec Fluke-451B - Manual (Page 2)

Specifications
Radiation detected Alpha > 7.5 MeV
Beta > 100 keV
Gamma > 7 keV
Operating ranges,
response time
0 mR/h to 5 mR/h (8 sec)
0 mR/h to 50 mR/h (2.5 sec)
0 mR/h to 500 mR/h (2 sec)
0 R/h to 5 R/h (2 sec)
0 R/h to 50 R/h (2 sec)
Accuracy Within 10 % of readings between 10 % and 100 % of full scale indication on any range,
exclusive of energy response
Detector Chamber (cc volume air
ionization)
349 cc
Chamber wall (phenolic) 246 mg/cm 2
Chamber window (mylar) 6.6 mg/cm 2
Beta slide 440 mg/cm 2
Automatic features Auto-zeroing, auto-ranging, and auto-backlight
Warm-up time One minute
Display LCD analog/
digital with backlight
Analog 100 element bar graph 6.4 cm long. Bar graph is divided
into 5 major segments, each labeled with the appropriate
value for the range of the instrument
Digital 2.5 digit display is followed by a significant zero digit
depending on the operating range of the instrument. The
units of measurement are indicated on the display at all
times. Digits are 6.4 mm (0.25 in) high. Low battery and
freeze indicators are also provided on the display
Modes Integrate mode Operates continuously 30 seconds after the instrument
has been turned on. Integration is performed even if the
instrument is displaying in mR/h or R/h
Freeze mode Will place a tick mark on the bar graph display to hold on
the peak displayed value. The unit will continue to read
and display current radiation values
Environmental Temperature range -20 °C to 70 °C (-4 °F to 158 °F)
Relative humidity 0 % to 100 % (at 140 °F)
Geotropism < 1 %
Typical energy
dependence
16 Nitrogen gamma rays are 110 % to 120 % of indicated readings as determined at the
University of Lowell
Power requirements Two 9 V alkaline, 200 hours operation
Dimensions (WxDxH) 10 cm x 20 cm x 15 cm (4 in x 8 in x 6 in)
Weight 1.11 kg (2.5 lb)
2 Fluke Biomedical 451B Ion Chamber Survey Meter with Beta Slide