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21. MAINTENANCE
Properly used, the thermometer should
maintain calibration indefinitely and not
require service other than occasional
cleaning of the housing and changing of
the batteries.
22. CLEANING
WARNING:
TO PREVENT IGNITION OF A
HAZARDOUS ATMOSPHERE BY
ELECTROSTATIC DISCHARGE,
CLEAN WITH DAMP CLOTH.
Do not clean with abrasives or solvents.
Use mild detergents, never immerse nor
use excessive fluid.
23. BATTERIES
If there is no display when the meter is
turned on, check condition of the three AA
batteries. Also check that the battery
terminals are clean and batteries are
properly installed.
If replacement is necessary, refer to
the BATTERY INSTALLATION AND
REPLACEMENT section for replacement
procedure.
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