Specifications

MS TECHNICAL MANUAL
LAST UPDATE 12-10-04
1060003 12/04
TESTING TYPE ”K” THERMOCOUPLE
See Thermocouple under “Component Description & Function” before proceeding
To test thermocouple for continuity: Unplug thermocouple from
control board to isolate it.
At room temperature, verify 2-3 ohms across red & yellow wire.
Replace if fails test.
To determine if an “overheating” or “under heating condition”
is caused by a faulty thermocouple:
Preheat unit for 15 minutes then monitor the generator’s surface, or
internal temperature. Next, unplug the thermocouple from the control
board. Set your VOM to the VDC scale, 50-200 MV (millivolt) range.
Using the provided millivolt chart, determine if the thermocouple is
generating the proper DC millivolts (+/- 1.0 millivolt) at the indicated
temperature. Quick Tip: If the unit is under heating, the DC millivolts
being generated will be much higher than what they should. If the
unit is overheating, the DC millivolts being generated will be much
lower than what they should be.
Replace if fails test.
Replacement Procedures
Unplug thermocouple from control board.
Loosen retainer bracket screw & remove from generator hole.
Install new thermocouple & secure to generator & control board.
Test unit for proper operation.