Meaning
Technical procedures compare the output of a measuring device against a known reference standard to identify and correct deviations. Regular metrology calibration ensures that the tools used to check parts are providing accurate and repeatable data. The process ends when the device is adjusted to within its specified tolerance and a certificate is issued.
Accuracy Verification
Measurement errors can lead to the acceptance of faulty parts or the rejection of good ones. Through metrology calibration, a technician determines the exact bias of a tool and applies a correction factor if necessary. This precision is required for the interchangeable parts used in mass production.
Traceability Chain
Every measurement must be linked back to a national or international standard through an unbroken sequence of comparisons. A valid metrology calibration provides the evidence that a local tool is just as accurate as the reference at the national laboratory. This global system allows parts made in different countries to fit together perfectly.
Tolerance Maintenance
Wear and tear on a gauge will cause its readings to drift over time. Scheduling metrology calibration at fixed intervals prevents this drift from exceeding the limits allowed by the engineering drawing. A tool that fails its check is removed from service immediately to protect the quality of the output.
High-precision manufacturing depends on the integrity of these measurements.
