Lincoln Impinger Conveyor Ovens 1100 Series - Manual (Page 4)

The temperature portion of the Time/Temp Display uses a Thermistor
Probe to sense oven temperature. The thermistor outputs a resistance
proportional to the oven temperature. This resistance is then converted by
the display into a temperature reading.
AUTOMATIC COOL DOWN When the oven reaches operating temperature the normally open Oven
Cool Down Thermostat closes. After the oven is switched OFF, the Ther
mostat bypasses the Fan Switch, keeping the Cooling Fan and Main Fan
in operation until the oven cools down to approximately 200°F (93.3°C).
Impinger II - 1100 Series Service Manual - International 4