Figure 4-1. A bimetallic, direct-reading (baby dial) thermometer.
CHECKING THE ACCURACY OF THE THERMOMETER
a. General. The accuracy of bimetallic thermometers must be maintained, since
they are used to monitor the temperature of frozen and chilled food products. All
bimetallic thermometers should be calibrated at least once a week. The ice point method
is used: this method permits calibration to within 0.1F.
b. Procedure. The sequence of the procedure for checking the accuracy of
calibrating the bimetallic thermometer follows:
(1) Obtain an insulated, one-pint container with a cap. (Suggestion: use a
one-pint, wide mouth "thermos" bottle.)