DAkkS calibration certificates are issued by a DAkkS accredited calibration laboratory.
Calibration is carried out by "MPA Kalibrierdient GmbH" in Berlin,
an accredited calibration laboratory according to DIN EN ISO / IEC 17025
Akk.Nr. D-K-17552-01-00
with recognition by the Federal Railway Authority
VMPA-testing
http://www.mpa-kalibrierdienst.de/?page_id=13
The force gauges are calibrated to the force reference standard means the Federal Institute for Materials Research and Testing (BAM), which are connected via the Physikalisch-Technische Bundesanstalt in Braunschweig to the national force standard.
