Calibration Verification is the process of confirming that a calibrated instrument continues to meet its accuracy specifications — performed between full calibrations using check standards or verification standards to ensure the instrument has not drifted out of tolerance.

Verification vs. Calibration

• Calibration: Full adjustment and characterization — restores the instrument to specifications.
• Verification: Quick check — confirms the instrument is still within tolerance WITHOUT adjustment.
• Frequency: Verification is done more frequently than calibration — daily or per-shift checks.
• Action: If verification fails, the instrument requires full recalibration — and all measurements since the last good verification are suspect.

Why It Matters

• Early Detection: Verification catches drift before it affects production measurements — proactive quality assurance.
• Cost: Verification is faster and cheaper than full calibration — practical for frequent checking.
• Traceability: Verification standards must be traceable — using CRMs or transfer standards.

Calibration Verification is the quick health check — confirming instrument accuracy between full calibrations to catch drift before it impacts measurement quality.