• Guidelines for managing a calibration program

    Accurate, reliable, and repeatable operation of monitoring and control loops in industrial automation and control systems (IACS) is vital in maintaining the safety and reliability of production facilities. Where repeatable measurements take place in the monitoring or control of a facility, the measuring instruments and test equipment must have repeatable outputs. A well-planned calibration program, correctly implemented and maintained, can directly contribute to achieving and ensuring the desired operation.

    A new ISA recommended practice (RP), ISA-RP105.00.01-2017, Management of a Calibration Program for Industrial Automation and Control Systems, sets forth a basic framework for developing and maintaining a consistent calibration program for IACS -- including instrumentation used in safety instrumented systems.  It provides guidance on methodologies for calibration of an IACS by considering the accuracy required by the process of each loop and, if necessary, adjusting loop components to achieve the desired loop or component accuracy.

    The RP provides a baseline definition and model of a quality management system that can be used to implement and maintain a calibration program for an IACS. Key topics include:

    • Planning a calibration program- encompassing required loop tolerances, confirmation intervals, and calibration personnel, equipment, procedures, and record systems
    • Verifying loop and component performance
    • Managing the program

    For information on viewing or obtaining ISA-RP105.00.01-2017, visit www.isa.org/findstandards.   For information on the ISA105 committee, Commissioning, Loop Checks, and Factory & Site Acceptance/Integration Tests for Industrial Automation Systems, contact Charley Robinson, ISA Standards, crobinson@isa.org.

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