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