AASHTO R 61-12 (2020) PDF Download

AASHTO R 61-12 (2020) is a standard practice that provides criteria and guidelines for establishing requirements for equipment calibrations, standardizations, and checks. The purpose of this standard is to ensure the accuracy and reliability of equipment used in testing and measurement processes. It is intended to be applied to equipment and test methods that are not covered by the specific requirements outlined in AASHTO R 18.

The standard outlines the general principles and procedures for calibrating and verifying the calibration of equipment. It includes guidelines for selecting appropriate calibration standards, determining the calibration interval, and documenting the calibration process. The standard also emphasizes the importance of regular checks and standardizations to maintain the accuracy of equipment.

It is worth noting that AASHTO R 61-12 (2020) was previously known as provisional standard PP 57. This indicates that it has been in use and reviewed by the industry, and has now been updated and formalized as a standard practice.