Calibration of Reference Instruments
Comparing your instrument with a reference instrument
When Brüel & Kjær calibrates for you, your instruments are compared with reference instruments in Brüel & Kjær’s accredited laboratories.
In order to obtain correct measurement results, it is important to compare the instrument with a fixed reference instrument with a long-term stability. A reference instrument is traceable to international primary institutes.
Company in-house calibration
If you have calibration facilities in-house, or you calibrate for other organisations, you will need your own reference instruments. Your reference microphones should be sent to Brüel & Kjær's accredited laboratory regularily. Brüel & Kjær recommends once a year. You should have at least two microphones as reference so that you can compare them with each other during the year.
If your requirements to uncertainty in reference instruments are at highest obtainable level, we recommend primary calibration at the Danish Primary Laboratory of Acoustics (DPLA).
Primary Calibration in primary institute – DPLA
DPLA annually performs hundreds of primary calibrations on reference microphones and accelerometers, for national metrology institutes, test/calibration institutes, and for organisations in the industry requiring absolute high stability and reliability in sensitivity over time.
DPLA has reference transducers with unsurpassed long-term stability, with data available for more than 35 years (Types 4160, 4180, 8305). This ensures that Brüel & Kjær reference instruments used in calibration process for customers do not degrade over time.
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