After performing calibration with a certificate of calibration, what is the expected status of the instrument?

• A. Calibrated
• B. Faulty
• C. Uncalibrated
• D. Out of span

Answer: (A)

Calibration paired with a certificate confirms that the instrument’s measurements match a known reference within the specified tolerance, and this documentation shows the measurement results, uncertainty, and traceability. Because of that, the instrument is considered calibrated and approved for use until the next calibration is due or until a test indicates drift. The certificate provides proof of accuracy and the standard used, so you have confidence in its current performance.

If the instrument were not within tolerance, it would be labeled as out of span or faulty, and if it hadn’t been calibrated yet, it would be uncalibrated.