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Abstract

The verification of industrial gasmeters, though officially the responsibility of individual member states, is nevertheless of considerable importance to the community as a whole. An EEC Directive on the required accuracy levels for such meters implies that the calibrating laboratories shall be in agreement with each other to a level of about 0.3%. To check on the situation four gasmeters, two CVM and two turbine meters, were calibrated at five laboratories in accordance with a programme initiated by a Project Group set up by the Commission's DGXII Bureau of Community Reference. The flowrates covered were from 16 + 4000 m3/h. The tests were successfully completed within a period of two years during 1983-85. Recalibrations by the two originating laboratories, at PTB, Braunschweig and NSM, Dordrecht showed that the gasmeters had been stable throughout the tests though one of the turbine meters was damaged mid- way and its characteristic shifted. Scatter of the test points about the laboratories' own mean lines was normally between 0.1 and 0.2% and a direct comparison between the calibrations obtained on any one meter in two different laboratories agreed to better than 0.3% in 22 of the 36 combinations tested. However the results from two laboratories were significantly different to the other three, one being about 0.25% higher and the other 0.2% lower than the curves fitted to the complete set of results. The causes of these shifts were not identified but are being investigated.

Additional information

Authors: SPENCER E A GREENWOOD, HENGHFIELD ROAD, BRIDGE OF EARN, PERTH, UK, GREENWOOD, HENGHFIELD ROAD, BRIDGE OF EARN, PERTH, UK
Bibliographic Reference: EUR 11298 EN (1987) MF, PP 70, BFR 150, BLOW-UP COPY, BFR 350, AVAILABILITY: CEC-LUXEMBOURG, BP 1003, GDL
Availability: Can be ordered online
Record Number: 1989126062300 / Last updated on: 1989-05-01
Category: PUBLICATION
Available languages: en
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