4
THERMOSTAT
CALIBRATION
1.
Attach pyrometer lead to thermostat bulb in the baking compartment. If a pyrometer is not
available, place a reliable mercury type oven thermometer in the center of the baking deck
(Approximately 1” above the surface).
2.
Preheat the oven to at least 400° F (204° C).
3.
When the burner reaches bypass or minimum flame, take the temperature reading.
4.
If the temperature is within 10° F (6° C) of the thermostat setting, do not change the
thermostat settings.
5.
If the temperature differs more than 10° F (6° C) from the thermostat setting, adjust the
thermostat as follows:
A.
Pull thermostat dial straight off without turning.
B.
Hold calibration plate on thermostat and loosen the two calibration lock screws
until the plate can be moved without moving the control.
C.
Turn calibration plate so that pyrometer reading is set in line with the indicator
mark at the 12 o’clock temperature variation will be 50° F (28° C) between letters.
Adjust the calibration plate as follows:
1.
Turn calibration plate counterclockwise if pyrometer or thermometer
reading is higher than the dial reading OR clockwise if the pyrometer or
thermometer reading is lower than the dial reading.
2.
Hold calibration plate and tighten two screws firmly.
3.
Replace dial.
Figure 3