The guideline gives recommendations regarding the calibration of universal counters. These are meant to ensure that the most important counter characteristics such as frequency deviation, frequency drift, stabilisation characteristics, and the most important counter functions such as the function of the input gates and gate control are examined in the various operating modes.
DIN EN ISO/IEC 17025:2000 General requirements for the competence of testing and calibration laboratories
DIN V ENV 13005:1999 Guide to the expression of uncertainty in measurement; German version ENV 13005:1999
EN ISO 14253-1:1998 Geometrical Product Specifications (GPS) - Inspection by Measurement of Workpieces and Measuring Equipment - Part 1: Decision Rules for Proving Conformance or Non-Conformance with Specifications ISO 14253-1:1998
VDI/VDE/DGQ/DKD 2622 Blatt 2-2003 Calibration of measuring means for electrical quantities - Methods for the determination of the measurement uncertainty