TORQUE TRANSDUCER, TORQUE SENSOR AND TORQUE METER CALIBRATION

The characteristics of the calibration of a static or dynamic torque meter

Torque meter calibration has its particularities when compared to the calibration of a dynamometer.

The output signal being, by nature, proportional to the torque applied, it is only necessary to resort to a second- or third-order mathematical model when trying to achieve high accuracy.

The torque applied is generally a pure torque when using an effective decoupling system. Therefore, calibration results are only usable for measuring a pure torque.

Using the torque meter for calibrating or checking torque wrenches

If the torque meter is used for torque wrenches calibration or verification, calibration must either be:

• performed by applying a combination of moments and transversal forces equal to those applied by the wrench; or
• completed by means of a specific test evidencing the insensitivity of the torque meter to these transversal efforts.

International standards for calibrating a torque meter

There is currently no international standard for torque meter calibration. However, a calibration guide has been issued by the European Metrology Association EURAMET under reference cg-14 / V.01, dated July 2007, available at: http://www.euramet.org.

ISO 6789 sets a calibration procedure for dynamometric wrenches.

NOTE : Spanish version /en/tecnologia/sensor-estandar/calibration-de-un-torquimetro