5. OPEN THERMOCOUPLE INDICATION
Overrange (OL) is displayed if any of the following condition
occur:
1. If no thermocouple is plugged into the thermocouple
connector.
2. If the thermocouple connected to the input is broken or
open-circuit.
6. RECALIBRATION PROCEDURE
The thermometer should be calibrated once a year to ensure
its continued accuracy. Contact RS Components for further
details of calibration service. The address is given at the end
of these instructions.
7. MAINTENANCE
7-1 Cleaning:
Periodically wipe the case with a damp cloth and mild
detergent.
Do not use abrasives or solvents. Clean and dry as
required.
7-2 Battery Replacement:
When LCD display shows “
”, the batteries have
insufficient power to support an accurate test. Replace
the batteries with Qty 6 type AAA cells.
May-2007
7
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