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Calibration and Service of Thermometers and Data Loggers

Written by Janice M on . Posted in Hygiene & Quality Control

It is important to ensure that your thermometers, data loggers and and humidity meters are performing correctly.

Below are a few frequently asked questions:

How often should we have our thermometer checked?

It depends on a number of factors. How important is temperature in your process? How often do you use your thermometer? How roughly is the instrument treated? Do you have the opportunity to check against other thermometers? For continued confidence in the accuracy of measurement, and to assist in compliance with standards and other legislation, it is recommended that you obtain a certificate of calibration at 12-month intervals.

What’s the difference between calibration & certification?

Calibration means “to measure”. The instrument being tested is calibrated against a known source. A certificate shows what results have been obtained during calibration and certifies the accuracy of the instrument.

What is meant by uncertainty of measurement?

When anything is measured there is a probability that there will be some inaccuracies. Perhaps the test instrument is not entirely accurate; perhaps ambient temperatures are not conducive to accurate measurement; possibly the operator has not followed correct procedures. Each measurement has an “uncertainty” factor, and this can be calculated by a combination of all potential errors. This is then stated as a tolerance, i.e. plus or minus the measured figure.

Can my data-loggers be calibrated?

Yes. Selectech can issue certificates for both temperature and humidity data-loggers with internal or external probes. The standard certificate includes three different temperature or humidity points, more points can be calibrated on request.

Contact us to send your instrument in for calibration.

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