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  • BSI
    BS EN 12405-1:2021 - TC Tracked Changes. Gas meters. Conversion devices - Volume conversion
    Edition: 2021
    $798.15
    / user per year

Description of BS EN 12405-1:2021 - TC 2021

This document specifies the requirements and tests for the construction, performance, safety and conformity of gas-volume electronic conversion devices associated to gas meters, used to measure volumes of fuel gases of the 1st and 2nd families according to EN 437 .

This document is intended for type testing, the detailed relevant provisions of which are given in Annex A.

Only three kinds of conversion are treated in this document:

  1. conversion as a function of temperature only (called T conversion);

  2. conversion as a function of the pressure and of the temperature with constant compression factor (called PT conversion);

  3. conversion as a function of the pressure, the temperature and taking into account the compression factor (called PTZ conversion).

This document is not relevant to temperature conversion integrated into gas meters which only indicate the converted volume.

Gas-volume conversion devices consist of a calculator and a temperature transducer or a calculator, a temperature transducer and a pressure transducer locally installed.

For application of this document, a conversion device may be, as a choice of the manufacturer, considered as a complete instrument (Type 1) or made of separate elements (Type 2), according to the definitions given in 3.1.20.1 and 3.1.20.2.

In this last case, the provisions concerning pressure transducers, temperature sensors and temperature transducers are given in Annexes B, C and D respectively.

Any conversion device can provide an error curve correction for a gas meter.

NOTE

When rendering an account to an end user the readings from the conversion device can be used in conjunction with the readings from a gas meter conforming to EN 1359 , EN 12480 , or EN 12261 , as appropriate, or to any other appropriate and relevant international or national standard for gas meters, without prejudice of national regulations.



Standard NumberBS EN 12405-1:2021 - TC
TitleTracked Changes. Gas meters. Conversion devices - Volume conversion
StatusDefinitive
Publication Date2021-12-10
ReplacesBS EN 12405-1:2018 - TC
DescriptorsPerformance, Approval testing, Conversion, Probes, Type testing, Electronically-operated devices, Calculators, Gas-supply meters, Volume flowmeters, 1st family gases, Electronic equipment and components, 2nd family gases, Volume, Transducers
ICS91.140.80 Drainage systems, 91.140.40 Gas supply systems
CommitteeGSE/25
ISBN978 0 539 19624 5
PublisherBSI
Pages244

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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