Calibration is the determination and documentation of deviations in a measuring device. This measuring device is compared with the measurement result of another measuring device (or standard), whereby the standard is traceable to national or international standards and therefore its correct and accurate function is known.
Adjustment
Adjustment involves intervening in the device to minimize a detected measurement deviation. Normally, a further calibration is carried out after an adjustment to verify that the intervention in the device was correct.
Traceability
Traceability involves comparing the measured value of a measuring device with a national or international standard. At each step, according to the hierarchy of standards, a measuring device is compared with a standard, which in turn has been calibrated with a higher-level standard. The calibration hierarchy ranges from company test equipment, working or factory standards, to reference standards and national standards.
Measurement uncertainty
Measurement uncertainty is a non-negative parameter and is specified without a sign. It characterizes the dispersion of the values associated with the measured quantity based on the information used.