2003VDI/VDE/DGQ 2618 Blatt 1.2-2003 Inspection of measuring and test equipment - Instructions for the inspection of measuring and test equipment for geometrical quantities - Uncertainty of measurement
1999VDI/VDE/DGQ 2618 Blatt 1.2-1999 Checking gauges and measuring tools - Instructions for testing measuring tools for geometrical quantities - Uncertainty of measurement