How are Digital Thermometers Calibrated?

Updated: Dec 31, 2019

Over time, results and accuracy provided by temperature measurement devices, such as digital thermometers tend to ‘drift’. To be confident in the results, there is a constant need to calibrate the device throughout its lifetime for accurate and reliable measurements. Calibration increases the accuracy of the test equipment and minimizes any errors or measurement uncertainties within measurement processes to an acceptable level. Calibration is often seen as a single process of adjusting the output or indication on a measurement device to match with the value of the applied standard within a specified accuracy, however, it also includes adjustment. Before calibration, it is very important to first understand what is being calibrated and how the calibration is being performed.


Different Methods for Calibrating Digital Thermometers


To calibrate a digital thermometer that uses an external temperature probe, some calibrators use a simulated temperature value that is applied—just to the thermometer only without the temperature probe. A voltage equivalent is applied to a specific temperature and a test instrument is attached to the digital thermometer. The result is then recorded, and the thermometer is said to be calibrated. Others use a more rigorous calibration method (system test) to test both the digital thermometer and the temperature probe together using a real heat source. The value displayed by the system being tested is then compared against the standard.


Calibration is vitally important wherever measurements are necessary. It allows you to have confidence in the results that your devices monitor, record, and subsequently control. Need calibration services? Custom Calibration is your #1 source to get temperature calibration services in CT! Our team can precisely calibrate your equipment for accurate temperature measurements.

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