Download - How to Calibrate a Thermometer
Kerryanne Hunter
Aim
To provide an understanding of the need to Calibrate
Thermometers in the food industry
ObjectivesState the reasons for calibrating a
thermometer
Demonstrate how to calibrate a thermometer correctly
Identify the frequency of Calibration
What you should do if your thermometer is not working correctly
So why bother?Recommended by the Manufacturer
If you are involved with a court proceeding
Due-diligence defences
Good Food Safety Practice
Types of Thermometer
Their are various types of thermometers.
These are just a few examples
Probe
Laser
Oven
Fridge
Many more.
What you will needProbe thermometer
Containers x 2
Crushed Ice
Clean Tap Water
Boiling Water i.e. From a kettle
Probe Calibration Record Sheet
Calibration Step 1 of 3:1. Fill a container with finely crushed ice, top with
clean tap water and stir well
2. Remove the thermometer from its case and slide the stem into the crushed ice
3. Immerse the thermometer stem into the ice a minimum of 2 inches for 30 seconds. The stem should not touch the sides/bottom of the container
4. If the temperature reading is +/-1°C, you are half way to checking your thermometer is calibrated correctly.
Calibration Step 2 of 3:1. Fill the second container with boiling
water, from a freshly boiled kettle
2. Immerse the thermometer stem into the boiling water a minimum of 2 inches for 30 seconds. The stem should not touch the sides/bottom of the container
3. If the temperature reading is +99/101°C, you have correctly calibrated your probe thermometer.
Calibration Step 3 of 3:The final step of any type of probe calibration
is to record your findings
By recording this information you are
Complying with the manufactures instructions and/or company policy
If you are involved with a court proceeding and/or due-diligence defences
Its good Food Safety Practice
It’s Broke What should we do?
Check the batteryCheck any wiresCheck the display readerCheck step 1 & 2, with a different
thermometerIf it still isn’t working then you have
to return it to the manufacturer for them to calibrate.
To SummariseWhy
How
When
What