calibration verification

**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.