Fluke 481 Operator's Manual page 8

481
Operators Manual
Environment .......................................................... Operating Temperature Range: -20 C to 50 ºC
Dimensions............................................................ 8 5/8 (l) x 4 1/2 (w) x 8 in (h) (21.6 x 11.3 x 20 cm)
Weight .................................................................... Approximately 2 lb, 9 oz (1.16 kg)
Batteries................................................................. Two 9-volt batteries provide over 200 hours continuous operation.
Audio Alarm........................................................... Set through communication programs. Setting at 1% increments, 1 %
Temperature Sensor ............................................. A temperature sensor in the 481-DE-SI is used to adjust for offset drift
Check Source ........................................................ Model number 450 UCS, allows user to check for proper instrument
Dose equivalent units were determined using conversion coefficients at H*(10), found in ICRU 47,
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
1 0
4
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Relative Humidity Range: 0 to 95% non-condensing
Geotropism: Less than 1%
Three lithium cells provide chamber bias voltage of 63 V (10 year life
expectancy)
to 100 % full scale
due to temperature. Readings are not corrected for changes in air
density due to pressure and temperature
operation. Gives a nominal reading of 0.4 mR/h (4 Sv/h)
Model 481B-DE-SI Typical Energy Dependence
April, 1992.
1 0 0
Energy (keV)
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