Part # MCOSM06 Rev 1 (11/03/08) Page 41

Resistance Vs. Temperature Chart

For Internal Oven Temperature Sensor

The Chart below will provide the Ohms at various
temperatures. This will enable you to determine if the
temperature probe is operable.
The chart is in degrees Fahrenheit.
TEMP 0° 10° 20° 30° 40° 50° 60° 70° 80° 90°
0° 932 953 974 995 1016 1038 1059 1080 1101 1122
100° 1143 1163 1184 1205 1226 1247 1267 1288 1309 1329
200° 1350 1370 1391 1411 1432 1452 1472 1493 1513 1533
300° 1553 1574 1594 1614 1634 1654 1674 1694 1714 1733
400° 1753 1773 1793 1813 1832 1852 1871 1891 1911 1930
500° 1949 1969 1988 2008 2027 2046 2065 2085 2104 2123
200 & 300 SERIES CONTROLLERS CALIBRATION
Both the 200 & 300 series controllers use a 0 to 10.25k OHM
potentiometer. First check the sweep on the potentiometer
between the middle wire and one of the outside wires
for a gradual increase or decrease in the resistance as the
potentiometer stem is turned.

Gas Units – Calibration 300 Series

1. Remove the temperature dial from the potentiometer.
2. Turn the potentiometer to its lowest setting (fully counter
clock-wise).
3. Place the temperature dial back on the potentiometer.
4. Align the mark on the temperature dial to the top left
edge of the 'F': on the left of the temperature dial and
sung down one of the set screws. DO NOT fully tighten
yet.
5. Set the temperature dial to 150°F and allow the oven
cavity for reach set temperature.
6. Conrm the temperature inside the oven cavity with you
meter and that shown on the temperature dial.
7. If an adjustment is required, loosen the set screw
and position the mark on the temperature dial to the
temperature shown on your meter.
8. Tighten set screw down.
9. Repeat as required (once is usually enough).
10. Fully tighten both set screws.

Gas Units – Calibration 200 Series

1. Remove the temperature dial from the potentiometer.
2. Turn the potentiometer to its highest setting (fully clock-
wise).
3. Place the temperature dial back onto the potentiometer.
4. Align the mark on the temperature dial 1/4" PAST the
500°F marking on the overlay and snug down one of the
set screws. Do NOT fully tighten yet.
5. Set the temperature dial to 159°F and allow the oven
cavity to reach set temperature.