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Calibrations are going digital

The digital accreditation symbol and digital calibration certificate are ready to be put into practice

PTB-News 1.2024
Especially interesting for

calibration laboratories

Industry 4.0

Following a successful pilot phase, accredited calibration laboratories will be able to apply for the digital calibration symbol starting in late March 2024 and thus provide digital proof that they are accredited. In combination with the digital calibration certificate developed by PTB, it serves as machine readable, tamper-proof and verifiable evidence of calibration which will ultimately replace paper calibration certificates.

Combining PTB’s digital calibration certificate (DCC) with DAkkS’s accreditation symbol contributes to widely automating production processes.

Industry 4.0 requires rapid, smooth and fail-safe communication between all participating machines. The successful calibration of a measuring instrument by an accredited body must also find its place in the digital communication chain. Two decisive elements of the certificate have been transferred to a digital format and brought to maturity: proof that the calibration body has been accredited by DAkkS (the digital accreditation symbol) and proof that the measuring instrument has been calibrated. The latter is PTB’s digital calibration certificate (DCC). These elements needed to be combined before fully automated processing, or “eAttestation”, could be achieved.

eAttestation underwent testing for several months. The participating pilot companies rated it as “fast, simple and useful”. It is therefore now time to put eAttestation into real practice: Accredited bodies can apply for the digital accreditation symbol from DAkkS starting on 30 March 2024.

The digital accreditation symbol is based on an electronic seal which is like a company stamp with additional accreditation information. It provides proof of accreditation in the digital realm. Accordingly, the digital calibration certificate enables calibration results to be transferred in a correct, fail-safe and machine-readable manner. On the basis of this, it will be possible to realize automated and networked production processes and their quality assurance in the future, which will increase efficiency and reduce costs.

PTB and the German Calibration Service (DKD) will continue to harmonize the contents of the DCC. In doing so, the DKD’s expert committees are contributing to making the quality assurance behind “Made in Germany” more widely known and successfully applicable in an international context.

The project is an important element of the “QI-Digital” initiative in which DAkkS and PTB are working on viable digital solutions in the different areas of QI: metrology, standardization, accreditations, conformity assessments and market surveillance together with the BAM Federal Institute for Materials Research and Testing, the German Institute for Standardization (DIN) and the German Commission for Electrical, Electronic & Information Technologies (DKE).


Siegfried Hackel
Senior Scientist 1.01
Digitalization in Division 1
Phone: +49 531 592-1017
Opens local program for sending emailsiegfried.hackel(at)ptb.de

Shanna Schönhals
Department 1.2
Solid Mechanics
Phone: +49 531 592-1240
Opens local program for sending emailshanna.schoenhals(at)ptb.de

The QI-Digital homepage: Opens external link in new windowwww.qi-digital.de