Thermometer calibration log

A monthly check that your probe thermometer reads true, in iced water and boiling water.

A sample written for a pizza machine from FSAI guidance. Change it to fit how you work: your EHO has the final say. Words in [brackets] are for you to fill in.

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Sample

Thermometer calibration log

The entries in italics are made-up examples, to show how it's filled in.

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Thermometer make and model

How to use it

  • Check each thermometer [monthly], and after it's been dropped.
  • Iced water: fill a cup with crushed ice, top up with cold water, wait two minutes, and hold the probe in the middle. It should read 0°C.
  • Boiling water: it should read 100°C. Take care.
  • It should be within 1°C. If not, adjust it or replace the battery and test again, or replace the thermometer.

Calibration checks

Date Thermometer Iced water (°C) Boiling water (°C) OK? Action if not OK Initials
Tue 1 Dec Probe 1 0.2 99.6 Yes AB
Fri 1 Jan Probe 1 1.8 99.1 No New battery; re-tested at 0.3°C and 99.8°C AB

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