Mega-forces with micro-accuracy
HBM builds a new calibration machine for forces up to 5MN
The HBM calibration laboratory in Darmstadt is one of the best for the force measurand and is accredited from 2.5 N to 1 MN. The machine uncertainties certified by the German Calibration Service (DKD) range from a mere 0.02 % to 0.00 5 % of the actual value. HBM is now investing in a new calibration machine for forces up to 5 MN. This corresponds to the weight force of a mass of 500 t. By way of comparison, a 200 m long ICE3 train weighs about 400 t.
The machine uses a hydraulic unit to generate the high forces. Calibration is performed by comparing the signal generated by the test specimen with that of the force reference transducer integrated in the machine. Under DKD-accreditation, the degree of uncertainty is verified by experts from HBM and the German National Metrology Institute (PTB).
Special machine features:
- Uncertainty of a mere 0.02 % or less of the particular force, even if this is only a fraction of the maximum force of the machine!
- The combination of great force, high accuracy and the opportunity to calibrate not only compressive force, but also tensile force transducers, make the machine unique.