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Title: Just What Are We Calibrating?
Author: Ron Sangster Bob Maurer,
Source: 2016 FMI Conference
Year Published: 2016
Abstract: Remote operation and reporting by sensors with built in intelligence is a massive growth industry. To meet this demand many instrument manufacturers now supply intelligent systems which can be interrogated /controlled by hand held or remotely operated equipment. These interrogate the signal conditioning modules mounted on the primary measuring elements. Gathered information from the circuitry in the sensor can be compared and verified against the original calibration data produced at the time of manufacture. Does this simple verification imply that since installation /calibration, that some deterioration of the actual measuring elements has not taken place, If deterioration has taken place , the magnitude of the calibration shift and by definition the integrity of the instruments readings will not be made manifest That this deterioration will not necessarily affect the integrity of the last or original calibration or that it does not affect the calibration or can be monitored and corrected for. Environmental conditions at the sensor location, can cause the loss of integrity and have serious implications in that any damage, obstruction, corrosion, erosion, buildup of lime scale, fatigue etc. will affect the results from the sensor

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