Thermo Scientific BF51634BC-1, Installation And Operation Manual

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Maintenance
Thermocouple Replacement
Thermo Scientific 9-7
Figure 6.Door Insulation Replacement
Thermocouple Replacement
All thermocouples are subject to aging and deterioration. This condition is
indicated by a gradual drop in millivolt output for any temperature and by furnace
operation at a higher temperature than the controller indicates. For critical
processes, periodically check the furnace chamber temperature with a separate
thermocouple and instrument to determine the amount of error.
The appropriate frequency of thermocouple replacement depends upon frequency
of operation and operating temperatures. For additional information, refer to Table.
“UT 150 Controller Operation”
To replace the thermocouple, complete the following steps (refer to Figure
“Thermocouple Replacement” ):
1. Remove the two top access panel screws and remove the top access panel.
The maul disconnect power does not need to be turned off to
replace the thermocouple