Calibrated torque transducers are required when large drives for agricultural machinery, ships or the automotive sector are being developed and tested. Generally, only DAkkS calibration certificates (DAkkS = National accreditation body for the Federal Republic of Germany) issued by accredited calibration laboratories are accepted. HBM has a new 400 kN•m torque calibration machine in its accredited in-house calibration laboratory, allowing for these types of calibrations to be performed Besides the German National Metrology Institute (PTB), HBM is the only other commercial provider of calibration for high torque sensors in Europe and is able to provide shorter delivery times than ever before.
The new HBM calibration machine is vertically aligned and enables both clockwise and counter clockwise torque to be calibrated in compliance with the recognized standards DIN 51309 and VDI2646. Special torque transducers in the range of 150 kN•m and 400 kN•m (torque transducers specifically designed for this calibration machine, such as the T10FH transducers) are used as reference transducers. The two precision reference transducers enables ±0.1 % measurement uncertainty in the range from 20 kN·m - 400 kN·m and ±0.15 % in the range 3 kN·m - 20 kN·m.For comparison purposes, the German National Standard, the top-level calibration machine with 1.1 MN•m (also called torque “torque standard test machine”) located at PTB (German National Metrology Institute), offers a measurement uncertainty of 0.08%.
In 1977, HBM was the first German company to be accredited as an official DAkkS calibration laboratory. Since then, measuring equipment for a wide range of measured quantities has been calibrated on behalf of customers to ensure traceability per DIN EN ISO 9001. The measuring capabilities of the reference standards used are verified by the German National Metrology Institute (PTB) at regular intervals. The calibration certificate is proof of traceability.