Profile
The Working Group realizes the unit Tesla of magnetic flux density and offers various calibration services to customers worldwide to disseminate magnetic quantities that are traceable to primary standards. The calibration services include magnetic field quantities and magnetic material parameters. The measuring technologies are continually optimized and further developed.
Research/Development
Research and Development
Reduction of measurement uncertainties of NMR measurements of fields up to 2 mT
Study of the natural line width of NMR spectra of fields up to 2 mT
Reduction of the measurement uncertainty and enlargement of the field area of measurements on sheet steel
Further development of PTB's dynamic Earth's magnetic field compensation system (not translated)
Technology Transfer
Development of a coil with reduced strayfield and low sensitivity to disturbances from external fields
Magnetic force microscopy imaging software (not translated)
Equipment qualification of magnetic gradient sensors for the detection of unexploded bombs
Services
Magnetic field measurements
The realization and maintenance of the unit Tesla of the magnetic flux density B as the base unit of magnetic quantities is an essential task of the working group.
The dissemination of the unit Tesla is realized by:
Magnetic measurements basing on nuclear magnetic resonance (NMR)
Calibration of field coils as standards of DC fields and AC fields
Calibration of magnetometers in DC fields and AC fields
Measurements on magnetic materials
Calibration of magnetic characteristics of magnetic materials:
Calibration of single electrical sheet steel according to IEC 60404, part 2, 3 and 6
Calibration of susceptibility
Calibration of coercive force
The measuring capabilities for magnetic quantities offered at PTB are listed at the BIPM's (Bureau International des Poids et Mesures) "Calibration and Measurement Capabilities" database (CMC).
Click here for the calibration and measurement capabilities (only in german) (PDF document on p. 2/5 contains the link in section 10.2).
Information
Special tests on request
Measurements of field profiles on the coil's axis
Tests of the magnetic moment of air cargo packages according to IATA and ICAO
Stray field measurements on inductive power transmission devices
Permanent reference magnets
Thin magnetic films, i.e. hysteresis and coercivity
Remarks on calibrations and tests
Please contact us before ordering a test or request for calibration. Coordinated processing of the order requires a specific scheduling.
Moreover, specifics on your test objects are required, such as mechanical dimensions. When ordering tests on Epstein samples and sheets the dimensions and tolerances as defined in IEC 60404 - part 2 and 3 should be strictly maintained.