Thermometers must be checked at least every 12 weeks to make sure that they are providing accurate temperature readings, or whenever there is a reason to think the thermometer is not working correctly.
Ice point Check : Add ice and a small amount of water in a glass, insert the thermometer and leave until the temperature is steady, record the result below.
Result of Ice point check should be between -1'C and +1'C
Boiling point check : Boil unsalted water, insert the thermometer and leave until the temperature is steady, record the result below.
Result of boiling check point should be between 99'C and 101'C
Reading in Ice Water (Degree)
Reading in Boiling Water (Degree)
Action taken if out of range
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