Měřidla

This document specifies the requirements and tests for the construction, performance, safety and conformity of conversion devices used to determine the energy of fuel gases described in the Table 1, including those of the 1st and 2nd families according to EN 437.
It is also applicable for treated non-conventional combustible gases complying with EN 437 and for which a detailed technical evaluation of the functional requirements (such as injected biomethane) is performed ensuring there are no other constituents or properties of the gases that can affect the metrological and physical integrity of the measuring systems.
This document mentions technical topics to consider when hydrogen and natural gas / hydrogen blends flow through the measuring systems.
This document can also be used as a guideline for measuring systems for other gases e.g. gaseous CO2 for CCUS.
This document is not applicable for raw or sour gases.
This document is not applicable for gas measurement in CNG filling stations.
The energy conversion device (ECD) considered in this document consists of an energy calculator (EC) and is associated with the following devices and/or functions:
— a volume conversion device (VCD) or a flow computer used as gas meter conversion, either conforming to EN 12405-1:2021, or to EN 12405-3:2015, for high accuracy measurements;
— a calorific value determination device (CVDD).
Requirements for type approval tests of the devices, not included in the above-mentioned standards are described in appropriate annexes specified in Table 6.
For the purpose of this document, the term “volume conversion devices” (VCDs) includes flow computers (FCs).
A single calculator may undertake the volume conversion functions for different metering lines.

This document specifies accessibility requirements and recommendations for accessible charging stations for electric road vehicles, following a “Design for All”/“Universal Design” approach.
This document applies to the charging infrastructure for M1 electric vehicles, which are used for the carriage of passengers and are equipped with at least four wheels and comprising not more than eight seats in addition to the driver's seat, and for N1 electric vehicles, which are used for the carriage of goods and having a maximum mass not exceeding 3,5 tonnes.
This document sets out requirements and recommendations designed to ensure that the charging infrastructure is accessible and usable for all drivers, including those with specific mobility needs. Autonomous driving vehicles are excluded from the scope of this document.
This document is applicable to charging infrastructures, whether public or private, intended for electric vehicle charging. While it primarily addresses requirements and recommendations for conductive charging, wireless/inductive charging is also considered where relevant.
This document covers:
— the built environment surrounding electric vehicle charging stations, including its location, identification, signage and information;
— the built environment close to the electric vehicle to enable the charging process;
— factors to be taken into account in the design and specification of electric vehicle supply equipment;
— the platform and applications to enable the type of charging and payment, when relevant;
— other possible basic services associated with the charging process: pedestrian connection, associated toilets, etc.
This document does not cover:
— electric vehicles categories other than M1 and N1, although its users could also benefit from the requirements given in this document;
— specific materials used within an electric vehicle supply equipment;
— definition of charging rates or charging prices;
— user personal safety and protection;
— grid connections for electric vehicle charging stations;
— parking policy and planning policy related to designated accessible parking spaces or electric vehicle charging.
NOTE Some of the requirements given in this document might not be applicable to private infrastructures (e.g. the ones related to the payment system).