This International Document relates to automatic pipettes which are generally used as national primary standards of volume. It gives advice on the manufacture and installation of such standards together with their calibration, use and maintenance. Automatic pipettes are used by national laboratories, services of legal metrology and regional laboratory metrological offices for the calibration of volumetric standards of a lower order and for the verification of volumetric instruments - including volumetric glassware (flasks etc.), a field which is covered by various OIML International Recommendations and ISO Standards (see clause 13 for references to International Standards and Recommendations relating to laboratory glassware).