Fluke 481 Operator's Manual page 15

Dimensions (L x W x H) ........................................ 8⅝ in x 4½ in x 8 in (21.6 cm x 11.3 cm x 20 cm)
Weight .................................................................... Approximately 2 lb, 9 oz (1.16 kg)
Batteries ................................................................. Two 9 volt batteries (NEDA 1604A or 6LR61 or 6AM6) provide over
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 450UCS (item number 3267644), allows user to check for
IP Rating ................................................................ IEC 60529: IP40
Safety ..................................................................... IEC 61010-1: Pollution Degree 2
Electromagnetic Environment ............................. IEC 61326-1: Portable
Emissions Classification...................................... IEC CISPR 11: Group 1, Class A.
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
200 hours continuous operation. 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
proper instrument operation. Gives a nominal reading of 0.4 mR/h
(4 μSv/h)
Group 1 ISM equipment: group 1 contains all ISM equipment in which
there is intentionally generated and/or used conductively coupled
radio-frequency energy which is necessary for the internal functioning
of the equipment itself. Class A equipment is equipment suitable for
use in all establishments other than domestic and those directly
connected to a low voltage power-supply network which supplies
buildings used for domestic purposes.
Model 481B-DE-SI Typical Energy Dependence
April, 1992.
1 0 0
Energy (keV)
Ion Chamber Survey Meter
Side
Slide - Closed
Slide - Open
1 0 0 0
Specifications
1 0 0 0 0
gpl02.eps
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