OIML G18 Controlled Vocabulary Julia Neumann 2022-12-16 2023-01-02 10:32:57 en-EN datum point #01620 the datum point constitutes the origin for the measurement of liquid levels (zero reference). It is the intersection of the vertical measurement axis with the upper surface of the datum plate, or with the bottom, inside surface of the tank if a datum plate is not provided 2022-12-19 09:13:29