The New American Standard for Digital, Dial, and Vernier Calipers

A new American standard for digital, dial, and vernier calipers, ASME B89.1.14, was approved by the ASME B89 dimensional metrology standards committee in 2017, and final publication of the standard is expected in 2018. The purpose of this paper is to introduce the new standard and discuss some of the key developments. In particular, the standard includes default specifications and calibration test methods that will have a major impact to calibration services. This paper will review the history of the development of the standard and discuss all the major sections of the standard, including specifications, rated operating conditions, test methods, conformance decision rules, and measurement uncertainty. The relationship between ASME B89.1.14 and the international standard for calipers, ISO 13385-11, will also be discussed.