Q: When should I calibrate a new instrument coming directly from the factory?
A: If it’s a legal requirement, or if you need to follow the changes in the instrument over time, you should track them from the initial calibration.

Q: When should I re-calibrate my instrument?
A: We recommend that you begin a calibration history from day one and re-calibrate once a year. Then you can compare measurement results over time.

Q: Is it sufficient to send in my instruments for calibration every second year?
A: Do you want to risk two years’ worth of measurement results being unreliable? As you would not be able to track down the time that the difference first occurred, we recommend annual calibration for electrical instruments.

Q: Our instruments are used in our internal R&D department only, and there are no public or quality standards we have to follow. Why should we calibrate?
A: If you need to compare measurement results, we recommend that you get calibrated, as then you will receive a certificate containing measured values.
Types of calibration

Q: What is the difference between accredited and traceable calibration?
A: Brüel & Kjær provides accredited calibration which is approved by accredited authorities. Traceable calibration is conducted according to the same standards, and ensures that calibration results are correct, but is not explicitly approved by the authorities.

Q: Why should I choose accredited calibration. Isn’t traceable calibration enough?
A: If you or your customers want to use the measurement results in public, or fulfil requirements in quality processes, you must have accredited calibration.

Q: Is it sufficient to use a calibrator?
A: A calibrator is used to verify the instrument just before and after the field measurement. This is not a replacement for periodic calibration in a laboratory.

Q: What is required for a calibration laboratory in order to achieve accreditation?
A: A quality policy fulfilling the requirements of ISO 17025 including physical premises, methodology, procedures, traceability, technical skills and record documents.