Automatic Testing Facility for Determining the Density of Liquids And Solids; and Determining the Volume of E1 Weights
Published Online: 3 FEB 2010
Copyright © 2009 ISTE Ltd.
Transverse Disciplines in Metrology
How to Cite
French College of Metrology (2009) Automatic Testing Facility for Determining the Density of Liquids And Solids; and Determining the Volume of E1 Weights, in Transverse Disciplines in Metrology, ISTE, London, UK. doi: 10.1002/9780470611371.ch61
- Published Online: 3 FEB 2010
- Published Print: 1 JAN 2009
Print ISBN: 9781848210486
Online ISBN: 9780470611371
- volume comparator;
- initial situation;
- fundamental aperture;
- isolated case
Fundamental aperture for density determination:
The Austrian Federal Office of Metrology and Surveying (BEV) has developed, in cooperation with Sartorius AG in Goettingen and the Vienna University of Technology, a test system for hydrostatic weighing and determining the density of liquids and solids, whereby mass comparators are automatically loaded alternately with weights and submerged plummets. With the load alternator for weights and plummets, the density of a liquid on one side and the density of a submerged solid (and therefore its volume) on the other side can be determined hydrostatically via direct comparison with standard plummets and the applied substitution weights.
To determine consecutively the volume of E1 weights and plummets, additional a fully automatic handling system for a 1 kg mass comparator, a volume comparator was developed. Thus, the hydrostatic weighing principle can be applied for serial volume determination on masses from 1 g to 1 kg by direct comparison with a single volume reference (e.g. a silicon sphere). This principle is implemented with a newly developed, fully automatic insertion mechanism for both completely submerged weights and substitution weights.
Both systems are used for the dissemination of density and volume by BEV as well as for testing and calibrating of liquids and plummets and determining the volume of weights in connection with the determination of mass scale.
The volume comparator is also used in other metrology institutes and in accredited calibration laboratories.