A calibration check is performed to confirm instrument readings are accurate.

• A. To confirm accuracy
• B. To update the software
• C. To adjust the device mechanically
• D. To replace the sensor

Answer: (A)

Calibration checks verify that instrument readings are accurate by comparing them to a known reference standard. This process ensures the device is reporting true values within its specified tolerance, which is essential for making safe, informed hazmat decisions. It isn’t performed to update software, adjust the device mechanically, or replace the sensor—those are separate maintenance or repair actions. If the check shows readings outside the acceptable range, the instrument would then be recalibrated or serviced to bring it back into spec.