Tech Services repairs and calibrates the Schumacher
Source Temperature Controllers and their driving power supplies.
control is accomplished by driving a thermo electric cooler
(TEC) with a constant current. This provides a constant source
for cooling. This cooling is overcome by one or two 100-watt
heaters that are physically mounted next to the TEC and are
electrically driven by a conventional temperature controller.
Both the TEC and the heaters are imbedded or potted in insulation
that is formed around the container.
test the unit to determine the failure and then strategically
cut into the potting to replace the defective device. The
unit is then repotted, performance tested and calibrated before
it is shipped back to the customer.