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of the shortening. If it is again within 5 "F (- 15%), the
thermostat does not require calibration.
If the thermometer is accidentally broken, and mercury
and pieces of broken glass fall into the shortening,
discard the shortening and clean the frypot thoroughly.
Mercury is highly poisonous.
11. If the temperature indicated on the thermometer differs
more than 5 "F (- 15 "C), remove the thermostat knob by
pulling it off its stem.
Do not rotate the knob while removing it.
12. Turn the adjustment screw in the center of the hollow
stem, using a small blade screwdriver. If the thermometer
reading was higher than the setting, rotate the screw
clockwise. If lower, counter-clockwise. For example:
setting:
250 "F (121 "C)
reading:
275 "F (135 "C)
adjustment:
114 turn clockwise.
13. After adjusting the screw, install the knob and reset the
thermostat
to 250°F (121 "C). Again, measure the
temperature of the shortening with the deep fat ther-
mometer. Wait a few moments for the shortening to reach
the 250 "F (121 "C) temperature setting, indicated on the
thermometer. The indicator light should go off when the
temperature reaches 250 "F (121 "C). Readjust screw if
necessary.
I
14. Set the thermostat to 275°F (135 "6).
15. Check the temperature
of the shortening when the
indicator light goes off.
16. If the temperature measured on the thermometer is not
within 5 "F (- 15 "C) of the thermometer setting, adjust
for the correct temperature as in steps 12 and 13 of this
procedure.
Once the thermostat has been calibrated and set at the
desired cooking temperature, do not use the thermostat
to turn the fryer 'off. Use the ON-OFF switch.
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