Specifications

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13. RE-ENABLE PROCEDURE
1. Turn the thermometer off.
2. Simultaneously press and hold the
HOLD and the CAL keys down and
momentarily press the ON/OFF key.
Continue to hold the HOLD and
CAL keys until the display blanks.
14. 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.