Rationale

Terms defined in Section 3 are not used consistently through the standard. These terms include but are not limited to verification displacement, displacement measuring system, metrological traceability, lower limit of verification range, verified range of displacements, capacity range, displacement-measuring system, reference standard, displacement-sensing device, readout, testing machine, and tolerance. In addition, the traceability statement does not match the one that E28.01 agreed to in November 2015. Appendix X2 is not properly referenced from the body of the standard, is not internally numbered correctly, and contains requirements, which are not permitted in an Appendix.