BS EN ISO 4787:2011 PDF

1   Scope This International Standard provides methods for the testing, calibration and use of volumetric instruments made from glass in order to obtain the best accuracy in use.

NOTE Testing is the process by which the conformity of the individual volumetric instrument with the appropriate standard is determined, culminating in the determination of its error of measurement at one or more points.

The International Standards for the individual volumetric instruments include clauses on the definition of capacity; these clauses describe the method of manipulation in sufficient detail to define the capacity without ambiguity. This International Standard contains supplementary information. The procedures are applicable to volumetric instruments with nominal capacities in the range of 0,1 ml to 10 000 ml. These include: single-volume pipettes (see ) without subdivisions; graduated measuring pipettes and dilution pipettes, with partial or complete subdivisions (see ); burettes (see ); volumetric flasks (see ); and graduated measuring cylinders (see ). The procedures are not recommended for testing of volumetric instruments with capacities below 0,1 ml such as micro-glassware. This International Standard does not deal specifically with pyknometers as specified in . However, the procedures specified below for the determination of volume of glassware can, for the most part, also be followed for the calibration of pyknometers.