DAkkS-Calibration Laboratory for Torque Transducers

This system will be used as Reference Standard for our production.

The system is located in a complete airconditioned laboratory where temperature and air humidity are regulated according to the required norms.

Our existing Quality Assurance System according to DIN EN ISO 9001 has been extended by the norm DIN EN ISO/ IEC 17025, valid for calibration laboratories.

For a fast processing of your DAkkS-calibration of your torque sensor or torque sensor chain, please observe our Check List of DAkkS-Calibration Order.

In order to achieve an optimal result during the calibration of torque sensors, special attention had to be given to the following parameters:

For the computation of the lever arm length, the acceleration of gravity at the setting up place of the calibration unit was determined experimentally by a national authority with the measurement uncertainty of 2 × 10^-6.
The lever arm length was adjusted to 2 × 509.838 mm because the length takes direct influence to the generated torque.
To avoid temperature fluctuations on the lever arm length, the lever arm was produced with special material with a very light thermal expansion coefficient.
Also the bearing friction affects the produced torque, therefore an air bearing of the lever arm was employed.
The uncertainty of measurement of the 140 mass discs should be as small as possible, so the masses were adjusted to class F1.

Please address the Return for Calibration and/or Repair form to:

Lorenz Messtechnik GmbH
Dept. Service
Obere Schlossstrasse 131
73553 Alfdorf
Germany

Contact

Heiko Lux
Tel.: +49 7172 93730-35
E-Mail: h.lux@lorenz-messtechnik.de

Laboratory Head

Dipl.-Ing. (FH) Alfred Botscher
Tel.: +49 7172 93730-17
E-Mail: a.botscher@lorenz-messtechnik.de

If you want a DAkkS-calibration of your torque sensor or torque sensor chain, please observe our check List of DAkkS-Calibration Order!

Calibration laboratory accredited by Deutsche Akkreditierungsstelle GmbH

The calibration laboratory is entitled, under the conditions in the following and under the consideration of the appropriate procedure guidelines and/or equipment standards, to issue calibration certificates for the measurand torque in the measuring range specified as follows:

Measurand / Calibration Object	Measuring Range	Measuring Conditions According	Best Measurement Capability	Comment
TORQUE
Torque sensor and torque measuring chains	0,2 N·m .. 200 N·m	DIN 51309	≥ 1 × 10-4	Class ≥ 0.05 Clockwise (CW) torque Counter-clockwise (CCW) torque
The uncertainties of measurement specified in the table are the smallest uncertainties of measurement which may be indicated on calibration certificates. The determination of these uncertainties of measurement was based on an extension factor k = 2 (corresponds to a coverage probability of approximately 95 %).

To download a PDF file, click on the desired file.

Calibration Steps for DAkkS-Calibrations

Letter of accreditation — DAkkS Accreditation Certificate

Recommendation for Calibration Intervals