NCSL International -
Z540 Standards

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Picture of the productANSI/ NCSL Z540.1-1994 (R2002) - eFile
Withdrawn as an active standard (July 2007) and superseded by ANS/ISO/IEC 17025:2005 for part 1 and ANSI/NCSL Z540.3-2006 for part 2.This standard provides a mechanism for promoting confidence in calibration laboratories and measuring and test equipment when it can be shown that they are operated in compliance with its requirements.The intent of this Standard is that laboratories meeting its requirements comply, for calibration activities, with the relevant requirements of the ANSI/ASQC Q90 series of standards, including those of the model described in ANSI/ASQC Q92 when they are acting as suppliers producing calibration results. This Standard includes the requirements relevant to calibration laboratories of ISO/IEC Guide 25 (1990) and requirements relevant to the quality assurance of measuring and test equipment derived from MI-Std 45662A.

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Picture of the productANSI/ NCSL Z540.1-1994 (R2002) - Print Version
Withdrawn as an active standard (July 2007) and superseded by ANS/ISO/IEC 17025:2005 for part 1 and ANSI/NCSL Z540.3-2006 for part 2.This standard provides a mechanism for promoting confidence in calibration laboratories and measuring and test equipment when it can be shown that they are operated in compliance with its requirements.The intent of this Standard is that laboratories meeting its requirements comply, for calibration activities, with the relevant requirements of the ANSI/ASQC Q90 series of standards, including those of the model described in ANSI/ASQC Q92 when they are acting as suppliers producing calibration results. This Standard includes the requirements relevant to calibration laboratories of ISO/IEC Guide 25 (1990) and requirements relevant to the quality assurance of measuring and test equipment derived from MI-Std 45662A.

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Picture of the productANSI/ NCSL Z540.2-1997 (R2012) - eFile
This standard has been derived from the International Organization for Standardization (ISO) U.S. Guide to the Expression of Uncertainty in Measurement to promote consistent international Methods in the expression of measurement uncertainty within U.S. standardization, calibration, laboratory accreditation, and metrology services. It is identical to the ISO Guide (corrected and reprinted, 1995) with the exception of minor editorial changes to facilitate its use in the United States. These changes are as follows: (1) a dot on the line is used as the decimal marker instead of a comma, (2) the spelling of words is in accordance with Webster's Third New International Dictionary instead of the Oxford English Dictionary, and (3) the running heads on pages are partially modified.

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Picture of the productANSI/ NCSL Z540.2-1997 (R2012) - Print Version
This standard has been derived from the International Organization for Standardization (ISO) U.S. Guide to the Expression of Uncertainty in Measurement to promote consistent international Methods in the expression of measurement uncertainty within U.S. standardization, calibration, laboratory accreditation, and metrology services. It is identical to the ISO Guide (corrected and reprinted, 1995) with the exception of minor editorial changes to facilitate its use in the United States. These changes are as follows: (1) a dot on the line is used as the decimal marker instead of a comma, (2) the spelling of words is in accordance with Webster's Third New International Dictionary instead of the Oxford English Dictionary, and (3) the running heads on pages are partially modified.

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Picture of the productANSI/ NCSL Z540.3-2006 (R2013) - efile
This National Standard establishs the technical requirements for the calibration of measuring and test equipment. This is done through the use of a system of functional components. Collectively, these components are used to manage and assure that the accuracy and reliability of the measuring and test equipment are in accordance with identified performance requirements. In implementing its objective, this National Standard describes the technical requirements for establishing and maintaining: the acceptability of the performance of measuring and test equipment; the suitability of a calibration for its intended application; the compatibility of measurements with the National Measurement System; and the traceability of measurement results to the International System of Units (SI).

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Picture of the productANSI/ NCSL Z540.3-2006 (R2013) - Print Version
This National Standard establishs the technical requirements for the calibration of measuring and test equipment. This is done through the use of a system of functional components. Collectively, these components are used to manage and assure that the accuracy and reliability of the measuring and test equipment are in accordance with identified performance requirements. In implementing its objective, this National Standard describes the technical requirements for establishing and maintaining: the acceptability of the performance of measuring and test equipment; the suitability of a calibration for its intended application; the compatibility of measurements with the National Measurement System; and the traceability of measurement results to the International System of Units (SI).

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