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481
Operators Manual
10
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.
Note
Be sure to observe proper polarity when replacing the batteries.
With a small blade
tool, insert into the
smallest slot. Press down,
then out.
gpl04.eps
Figure 2. Battery Access
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.
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