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AASHTO R 61-12 (2016) Standard Practice for Establishing Requirements for Equipment Calibrations, Standardizations, and Checks
standard by American Association of State and Highway Transportation Officials, 2012
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This practice contains general criteria and guidelines for establishing requirements for equipment calibrations, verification of calibrations, standardizations, and checks. This practice is intended to be used for equipment and test methods not specifically addressed in R 18.This standard was formerly designated as provisional standard PP 57.