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Standards Bodies
In the U.S., there are currently two national standards for calibration laboratories: the ANSI/NCSL Z540-1-1994, Calibration Laboratories and Measuring and Test Equipment—General Requirements and the ISO/IEC 17025:1999 General Requirements for the Competence of Testing and Calibration Laboratories. The Z540-1 has been an American National Standard since 1994. Part I of Z540-1 is based on the ISO/IEC Guide 25. Part II of Z540-1 is based on MIL-STD 45662A and was included to meet U.S. Department of Defense requirements. Though MIL-STD 45662A was cancelled in 1995, its requirements are still met through the Z540-1 as well as through ISO 10012-1, Quality Assurance Requirements for Measuring Equipment.
