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Temperature calibrator, Simulator, Dry-block calibrator, Pressure calibrator, Calibrator
Text version of the page
| Croda also enforces its own in-house safety and quality standards that require certain sensors to be checked every week, every time an area of the plant shuts down for maintenance, or every year. The most frequent calibrations are reserved for critical sensors such as the pH meters that measure the acidity of the effluent discharged to the river. Wright describes Croda's third criteria for calibration planning as "experience of practice". Management analyzes the history of previous calibration operations and determines the optimal interval between calibrations for sensors that do not require regular checks. This analysis can be performed automatically with calibration software like CMX, thereby improving the efficiency of creating a calibration schedule and Sensors that are found to be highly stable need not be re-calibrated as often as sensors that tend to drift. | |||||||||
| The bottom line The ROI afforded by an automated calibration planning system will depend not only on the cost of acquiring it, but on the savings it provides. Net returns will be greatest under the following conditions... • When the plant is highly regulated. • When current calibration procedures are highly laborintensive due to a large number of instruments, a large variety of instruments, a particularly complicated set of calibration procedures, or a particularly cumbersome set of paper-based reporting procedures. • When a large percentage of instruments have discretionary calibration intervals (that is, when most instruments do need to be calibrated at fixed intervals for regulatory, safety, or quality reasons or because access is limited to specific maintenance periods). • When the instruments to be calibrated must meet a wide variety of tolerance, safety, and quality requirements, especially when some requirements are stricter than others. • When a large number of plant personnel must coordinate their efforts either to perform calibration work or to review the results. | |||||||||
| relieving maintenance personnel of the need to remember when a particular sensor is due for calibration work. And by maintaining calibration schedules for all of the sensors in the plant in one electronic database, calibration software can reduce the administrative headaches ofmaintaining individual schedules for individual machines, processes, and operational zones. Automatic archiving functions also eliminate the transcription errors common to hand-written calibration reports and work schedules, saving not only the time required to fill out a paper report, but the time required to do it again when mistakes are discovered. | |||||||||
| CALIBRATION WORLD 01» 2006 www.beamex.com/calibrationworld 9 | |||||||||