Amprobe TC-253B Temperature-Converter - Manual (Page 6)

TP-255A Bead Thermocouple:
Temperature Range: -40ºC to 204ºC (-40ºF to 400ºF).
Tolerances: = (2.2ºC or 0.75%) from 0ºC to 204ºC
= (2.2ºC or 2.0%) from 0ºC to -40ºC
Wire Length: 1 meter, with miniature plug. Teflon tape insulated.
MAINTENANCE:
� WARNING!
TO AVOID ELECTRICAL SHOCK REMOVE TEST
THERMOCOUPLE BEFORE OPENING THE COVER.
GENERAL MAINTENANCE:
1. The case can be cleaned with a mild solution of detergent and water. Apply
sparingly with a soft cloth and allow the TC-253B to dry completely before using.
Do not use hydro carbon or chlorinated solvents or abrasives for cleaning.
2. All calibration and repair should be performed by an authorized service center or
by other qualified instrument service personnel. To maintain a thermocouple in
good condition, observe the following items.
• Avoid excess bending.
• Don’t overheat the thermocouple.
• Avoid chemical reactions that can damage the thermocouple.
BATTERY CHECKING AND REPLACEMENT:
To check the battery:
1. Turn the TC-253B OFF.
2. Insert the “output plugs (V and COM)” to the input terminals of multimeter to
“DCV” for autoranging type meter or 20 VDC or greater for manual ranging
type meter.
3. Read the display on the multimeter. Replace the battery, if the reading is less
than 7.1V.
To replace the battery, refer to Figure 2 and use the following procedure.
1. Turn the TC-253B OFF and disconnect the multimeter and thermocouple.
2. Position the TC-253B face down. Remove the screw from the bottom case.
3. Remove the bottom case.
4. Carefully disconnect the battery from bottom case