Metrological Deviation
Quantifiable proximity between the measured value of a sensor and its true reference value under specified environmental conditions. Achieving high sensor calibration accuracy requires the use of instruments with a known uncertainty that remains much lower than the tolerance of the device under test.
Verification Chain
Traceability to national standards ensures that the measurement results are comparable across different laboratories and regions. Maintaining sensor calibration accuracy involves a series of comparisons against increasingly precise standards, ending at a primary reference.
Error Source
Environmental interference such as electromagnetic noise or temperature fluctuations can degrade the performance of a sensor during the test. Factors affecting sensor calibration accuracy include the stability of the excitation voltage and the resolution of the data acquisition system. Proper shielding and thermal stabilization of the test bench are necessary to isolate the actual sensor behavior from external influences.
Technicians often monitor the ambient humidity to ensure it does not introduce parasitic capacitance into the measurement circuit. This isolation of variables allows for a true assessment of the instrument’s performance.
Tolerance Management
Manufacturers specify a maximum allowable error that the device must stay within to be considered functional. Regular checks of sensor calibration accuracy detect the drift caused by component aging or physical wear.
