General • Inspections

Thermometer Accuracy Check.

Accuracy checks ensure that thermometers used in measuring HACCP / Preventive control points and for controlling the health and safety of product either in transit or storage are effectively and accurately monitoring temperatures.

PGO - Greencastle

05/22/2024

Thermometer Accuracy Check.

Temp sensor verification.

Use plant layout map in Gams+ to verify you are testing the correct probe.
A portable ice bath / ice slurry should be used, which provides a stable temperature for thermometers.
Place crushed ice in cup / container, add just enough water to make a uniform slush ice medium to facilitate even contact between the thermometer and the slush ice bath. Ensure enough water is used in the ice to prevent air gaps between the ice cubes.
Place the thermometer in the ice water bath. It is important to keep the tip of the thermometer immersed a minimum of 2 ½ inches without touching the bottom of the container as this will give you a false reading.
The thermometer should read within a two-degree allowance of 32 degrees F when placed in the ice bath. If for some reason the thermometer does not read within the two-degree allowance of 32 degrees, add more ice, ensuring you stir it to remove any air gaps.
If the thermometer still does not read within the two-degree allowance of 32 F after adjustments to the ice bath are made, it may need to be replaced or sent out for calibration.
For thermometers that cannot be removed, it is acceptable to place the NIST reference thermometer next to the process thermometer to verify proper temperature readings. Ensure that this is completed after the reference thermometer has been accuracy checked and the probe has been allowed to dry.
Enter the results below, being sure to fill in all required information. For the portable measuring devices or the wall mounted thermometers, the probe thermometer reading would be considered the Reference Temperature.

Unit 1 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 2 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 3 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 4 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 5 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 6 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 7A temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 7B temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 8A temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 8B temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 9A temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 9B temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 10 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 11 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 12 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 13 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 14 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Are all probes in compliance according to the PGO Thermometer Accuracy Check policy.

Pass
Flag
Fail

Source: PGO - Greencastle (Community Member)

Temp sensor verification.

Use plant layout map in Gams+ to verify you are testing the correct probe.

A portable ice bath / ice slurry should be used, which provides a stable temperature for thermometers.

Place crushed ice in cup / container, add just enough water to make a uniform slush ice medium to facilitate even contact between the thermometer and the slush ice bath. Ensure enough water is used in the ice to prevent air gaps between the ice cubes.

Place the thermometer in the ice water bath. It is important to keep the tip of the thermometer immersed a minimum of 2 ½ inches without touching the bottom of the container as this will give you a false reading.

The thermometer should read within a two-degree allowance of 32 degrees F when placed in the ice bath. If for some reason the thermometer does not read within the two-degree allowance of 32 degrees, add more ice, ensuring you stir it to remove any air gaps.

If the thermometer still does not read within the two-degree allowance of 32 F after adjustments to the ice bath are made, it may need to be replaced or sent out for calibration.

For thermometers that cannot be removed, it is acceptable to place the NIST reference thermometer next to the process thermometer to verify proper temperature readings. Ensure that this is completed after the reference thermometer has been accuracy checked and the probe has been allowed to dry.

Enter the results below, being sure to fill in all required information. For the portable measuring devices or the wall mounted thermometers, the probe thermometer reading would be considered the Reference Temperature.

Unit 1 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 2 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 3 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 4 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 5 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 6 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 7A temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 7B temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 8A temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 8B temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 9A temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 9B temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 10 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 11 temp probe verification.

Reference thermometer reading.

Actual unit temp reading.

Difference between readings.

Adjustment made to temperature offset of senser.

Unit 12 temp probe verification.