Thermometer calibration

[Sunjay]

Dear All

Can anyone tell me how to calibrate the thermometer against the National Physical Lab calibrated thermometer and what will be acceptance criteria?

I have some document in internet telling it to calibrate at ice point, room temp and in boiling water. What will be acceptance criteria?

Pls help.

Thanks/ Regards

[tom jupille]

I doubt that there are universal "acceptance criteria". Depends how accurate you need it to be for your purposes.

[Sunjay]

Dear All,

Can anyone help me on writing a SOP fort the calibration of thermometer in the laboratory (for pharma lab) against NIST certified thermometer.

If anyone have know about any respective document etc., please help.

Thanks/ Regards

[KarenJ]

Sunjay,

There is a brief discussion about thermometer calibration in USP General Chapter <21>. This discussion mostly tells you how to immerse the thermometer during validation. I think that Tom is right. It is unlikely that you will find any specific validation criteria. You need to set your criteria based on what type of thermometer you have and the tolerances of the process that you are trying to control. The temperatures or conditions that you use for validation will depend on the temperature range of your thermometer and the temperature that you need to be able to measure. For example, there is no point validating your thermometer at the boiling point of water if your thermometer is intended for verifying the temperature of your freezer. Also, make sure that your validation temperatures bracket the temperature that you intend to measure with your thermometer.

Good luck,

KarenJ

[Sunjay]

Dear Karenj and Tom,

Thnaks for your valueable inputs.