Storage; Battery Replacement; Ion Chamber Window Replacement - Fluke 481-DESI Operator's Manual

Ion chamber survey meter
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481
Operators Manual

Storage

If the unit is to be stored prior to use, pack it in the original container, if possible, and
store in an environment free of corrosive materials, fluctuations in temperature and
humidity, vibration or shock. The instrument should be stored with the two 9 Volt
batteries removed. Prior to use, check the condition of the desiccant. A blue color
indicates that the desiccant is good, while a pink color indicates the need to
replace/regenerate.

Battery Replacement

The LOW BAT message will appear on the display approximately 6 hours prior to the
instrument becoming inoperable. To ensure that the instrument operates to specification,
it is recommended that the batteries be changed within one hour after the LO BAT
message appears. The instrument will function on one battery for approximately
100 hours, allowing replacement of one battery at a time if the instrument must remain
operational during battery changeover. Regular or alkaline batteries can be used for
replacement purposes.
Batteries are accessible from the rear of the instrument.
Be sure to observe proper polarity when replacing the batteries.

Ion Chamber Window Replacement

1. Remove the 9-volt batteries to be sure that the instrument will remain off during the
disassembly process.
2. Remove the 4 screws from the case top.
3. Carefully remove the case bottom from the thick gasket that seals the top and bottom.
10
Shop for Fluke products online at:
Note
Figure 2. Battery Access
MyFlukeStore
www.
With a small blade
tool, insert into the
smallest slot. Press down,
then out.
1.877.766.5412
.com
gpl04.eps

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