Measurement of resistance weld current and calibration of the measurement devices have been performed for many
decades. However, the indications, readings, or outputs of devices made by different manufacturers and sometimes, the
same manufacturer, while measuring the same current differ from one another significantly. This Measurement and
Calibration Specification was prepared to help equipment manufacturers and users take into account some of the
common sources of measurement uncertainty and standardize the methods of testing/calibration of these devices. The
information that shall be provided to the user upon the completion of the calibration effort is also clearly specified. The
goal is to assure consistent weld current measurement results independent of measurement equipment and to provide the
user with a quantitative estimate of the total measurement uncertainty.