User guide

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20. MAINTENANCE
Properly us ed, the th ermome ter should
maintain calibr ation in defi n itel y and not
require service other tha n occasional
cleaning
of the housing and changing
of
the batteries.
21. CLEANING
WARNING:
TO PREVENT IGNITION OF A
HAZARDOUS AT M OSPHERE BY
E
L E C TROSTATI C DISCHARGE,
CLEAN WITH DAMP CLOTH.
Do not clean wi th abrasives or solven ts.
Use mild deter ge nts, never immerse nor
use excessive fluid.
22. BATTERIES
If there is no display when the thermometer
is turned on, check cond ition of th e three
AA ba tteries. Also check that th e batter y
ter
minals are clean and batteries are
properly install ed. If replacement is
necessary , refer to the BATTERY
INSTALLATION AND REPLA
C EMENT
se ction for replacemen t proced ure.