What must be maintained for inspection regarding calibration?

What must be maintained for inspection regarding calibration?

• A. A signed certificate identifying the most recent date of calibration.
• B. A log of calibration expenses.
• C. A copy of the instrument manual.
• D. A photograph of the instrument.

Answer: (A)

Documentation of calibration status is what inspectors look for. You must keep a signed certificate that shows the most recent calibration date for each instrument. This provides a verifiable record that the device was checked against standards, confirms its accuracy, and sets a due date for the next calibration. That kind of proof is what inspectors rely on to verify ongoing compliance and reliability of equipment. For context, a log of calibration expenses doesn’t prove accuracy or dates, a manual explains usage but not calibration history, and a photograph doesn’t capture calibration data or dates.

Documentation of calibration status is what inspectors look for. You must keep a signed certificate that shows the most recent calibration date for each instrument. This provides a verifiable record that the device was checked against standards, confirms its accuracy, and sets a due date for the next calibration. That kind of proof is what inspectors rely on to verify ongoing compliance and reliability of equipment. For context, a log of calibration expenses doesn’t prove accuracy or dates, a manual explains usage but not calibration history, and a photograph doesn’t capture calibration data or dates.