Guides

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Active Guides

SUMMARY

WELMEC is the European cooperation in the field of legal metrology. Its Members are representative of national authorities responsible for legal metrology in European Union and European Free Trade Association (EFTA) member States.

AUTHORS: WELMEC Secretariat

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 1, Version 2017 (English)

SUMMARY

The European Standard on non-automatic weighing instruments EN45501 contains the requirements for non-automatic weighing instruments subject to legal metrological control in order to provide presumption of conformity to the essential requirements of EC Directive 90/384/EEC. The requirements of that standard apply to all devices performing the relevant functions, even if manufactured as separate units (EN45501 Point 2.4). Therefore, a Point of Sale (POS) device is subject to the relevant requirements of EN45501.

This guide, WELMEC 2.2, which follows the principles established in the WELMEC 2.5 'Guide for modular approach', specifies the requirements for a POS device connected to a non-automatic weighing instrument intended to be used for direct sales to the public.

AUTHORS: Working Group 2

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 2.2, Version 2007, Issue 3 (English)
Guide No. 2.2, Version 2007, Issue 3 (French translation)
Guide No. 2.2, Version 2007, Issue 3 (German translation)
Guide No. 2.2, Version 2007, Issue 3 (Serbian translation)

SUMMARY

Weighing instruments (WIs) are often constructed from typical modules such as indicator, mechanical construction and load cell. Therefore, type examinations are often performed on representative modules which can be tested separately.

For non-automatic weighing instruments (NAWIs) the basis of this modular concept is laid down in OIML R 76, No 8.2, and EN 45501, No 8.1, respectively, where the following relevant cases are mentioned:

  • testing of the instrument as a whole is difficult or impossible
  • the module is manufactured and/or placed on the market as a separate unit to be incorporated in a complete instrument
  • the applicant wants to have a variety of modules included in the approved pattern

AUTHORS Working Group 2

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 2.4, Version 2021, Issue 3 (English)

Former versions

Guide No. 2.4, Version 2001, Issue 2 (English)
Guide No. 2.4, Version 2001, Issue 2 (French translation)
Guide No. 2.4, Version 2001, Issue 2 (German translation)
Guide No. 2.4, Version 2001, Issue 2 (Serbian translation)

SUMMARY

The guide describes the procedures suitable to be used when testing automatic catchweighing instruments. The document is based on the OIML recommendation R51 on automatic catchweighing instruments.

This guide gives additions to, or interpretations of, OIML R51 accepted by WELMEC members. This guide refers also to other WELMEC guides and especially those developed for non-automatic weighing instruments [NAWIs] and the WELMEC Type Approval Agreement. This document also describes the national regulations of some European Countries as far as the requirements influence the acceptance of test results.

This guide is mainly describing instruments with a transport system and front end loaders. Other (Class Y(y)) instruments will be added in a later stage.

AUTHORS: Working Group 2

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 2.6, Version 2008, Issue 3 (English)

SUMMARY

The objective of this guide is to supply the background to use results of tests performed on NAWIs based on EN 45501 and OIML R76/2006.

A main prerequisite is that the AWI that is to be approved on these test results is not working dynamically (load in relative motion to the load receptor when being weighed), that is this guide does not cover e.g. checkweighers equipped with conveyors that do not stop for weighing. However, with instruments filling material e.g. in a weighing hopper this guide is applicable, although the material may not be completely at rest when being weighed.

The guide shows principles and, where useful, supplies examples to make necessary calculation more transparent (e.g. for gravimetric filling instruments).

The guide is divided into three chapters:

I. Automatic catchweighers
II. Discontinuous totalisers
III. Automatic gravimetric filling instruments

AUTHORS: Working Group 2

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 2.8, Version 2012, Issue 2 (English)

SUMMARY

 

AUTHORS: Working Group 2

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 2.10, Version 2021 (English)

SUMMARY

This document intends to reflect on the most important issues normally taken into account by authorities – specifically in relation to accuracy classes, the role and setting of maximum permissible errors in service, acceptable maximum rate of non-conforming instruments in use and the use of measurement uncertainty when assessing instrument conformity.

AUTHORS: Working Group 4

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 4,2, Version 2006, Issue 1 (English)

SUMMARY

This guide is a completely new issue of Guide 5.2 on Market Surveillance of Measuring Instruments. It replaces Issue 2, dating from May 2007. This guide will be applicable as from 20 April 2016. It can be used in the meantime, but the reader should be aware that the safeguard procedure reflected in this guide is the one from NLF MID and NAWI.
Of course, there are still wishes to expand the guide and inevitably an update will be necessary in the coming years.

This guide is primarily intended to provide guidance to market surveillance authorities and their employees. This guide also provides information on how market surveillance is performed to manufacturers of measuring instruments and to Notified Bodies responsible for conformity assessment of their products. Where issues are treated that are specifically mentioned in the Blue Guide references to the relevant passages are included in notes.

The Guide is purely advisory and does not impose any restrictions or additional requirements beyond those contained in MID, NAWI or Regulation 765/2008/EC. Alternative approaches may be acceptable, but the guidance provided in this guide represents the considered view of WELMEC as to the best practice to be followed. However, it is intended that the procedures as de-scribed in the guide must be followed if it is to be claimed that the guide has been applied.

References to Regulation 765/2008/EC are subject to change by the Proposal for a Regulation On Product Safety and Market Surveillance Package (Article 35.3 of COM(2013)57).

AUTHORS: Working Group 5

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 5.2, Version 2015 (English)
Guide No. 5.2, Version 2015 (French translation)

SUMMARY

The focus of this document is on the risk assessment of weighing and measuring instruments in the context of market surveillance, this is targeted at the point or close to the point instruments are put into the market.

The rationale behind this document is the need for more selective market surveillance, as a result of the increasingly limited resources of the WELMEC Member States. Another reason for such a document is the requirement in Art.19, 1 of REGULATION (EC) No 765/2008 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 9 July 2008 setting out the requirements for accreditation and market surveillance relating to the marketing of products and repealing Regulation (EEC) No 339/93. This article runs as follows:

'Market surveillance authorities shall perform appropriate checks on the characteristics of products on an adequate scale, means of documentary checks and, where appropriate, physical and laboratory checks on the basis of adequate samples. When doing so they shall take account of established principles of risk assessment, complaints and other information.'

Risk assessment directly related to weighing and measuring instruments, is one part of market surveillance; this is to understand the impact the instrument will have on the end user/consumer. The other part is using risk assessment as tool for the market surveillance authority to define priorities and to determine the choice of strategies to achieve their goals.

The way market surveillance is performed as with conducting a risk assessment is heavily influenced by a set of underlying assumptions and philosophies about its position, its role and the functions it performs in Member States.

To prevent duplication with “Best practice techniques in market surveillance” published by Prosafe, principles have been used when writing this document but it is not a direct copy.

AUTHORS: Working Group 5

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 5.3, Version 2011, Issue 1 (English)
Guide No. 5.3, Version 2011, Issue 1 (Serbian translation)

SUMMARY

The European Legal Metrology Cooperation (WELMEC) Working Group 6 has prepared a series of documents to assist competent departments, packers and importers in complying with the Directives relating to  ‘e’-marked prepackages, mandatory nominal quantities, drained weight and other allied requirements.

This document provides an overview of all the documents in this series and also contains contact points in each Member State for ‘e’-marked prepackages.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.0, Version 2010, Issue 3 (English)
Guide No. 6.0, Version 2010, Issue 3 (Serbian translation)
Guide No. 6.0, Version 2010, Issue 3 (Spanish translation)

SUMMARY

Member states of the European Economic Area have implemented the Council Directives 75/106/EEC of 19 December 1974 and 76/211/EEC of 20 January 1976 in their national legislation. The directives deal with marking and quantity control of e-marked prepackages.

The series of documents intends to provide guidance to all those concerned with the application of directives 75/106 and 76/211/EEC on e-marked prepackages.

They will lead to a uniform interpretation and enforcement of these directives and assist in the removal of barriers to trade.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.1, Version 2019, Issue 2 (English)

Former versions

Guide No. 6.1, Version 1997, Issue 1 (English)
Guide No. 6.1, Version 1997, Issue 1 (Serbian translation)

SUMMARY

Member states of the European Economic Area have implemented the Council Directives 75/106/EEC of 19 December 1974 and 76/211/EEC of 20 January 1976 in their national legislation. The directives deal with marking and quantity control of e-marked prepackages.

The series of documents intends to provide guidance to all those concerned with the application of directives 75/106 and 76/211/EEC on e-marked prepackages.

They will lead to a uniform interpretation and enforcement of these directives and assist in the removal of barriers to trade.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.3, Version 2009, Issue 2 (English)
Guide No. 6.3, Version 2009, Issue 2 (Serbian translation)

SUMMARY

This guide serves as manual for packers using the e-mark who want to have their procedures recognised in connection with the e-marking regulations, or who want to modify procedures that have already been recognised. The content is based on legal requirements, the interpretation of them by WELMEC and practical solutions and recommendations.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.4, Version 2015 (English)

SUMMARY

WELMEC Working Group 6 was set up to discuss, and propose solutions for, the problems associated with the trading of prepackaged goods between EEA countries.

It was decided that a universal manual for inspectors, which could be used by Competent Departments in all EEA countries, should be produced. The intention of the manual is to achieve a uniform level of enforcement.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.5, Version 2012, Issue 2 (English)
Guide No. 6.5, Version 2012, Issue 2 (Serbian translation)

SUMMARY

This document contains information about the 'e' mark, applying for recognition, setting up of a procedure of the quantity control system and the standards to be applied, including general information on the 'e' mark, the quantity control system, requirements for recognising procedures 'e' pre-packaging product specification.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.6, Version 2013, Issue 2 (English)
Guide No. 6.6, Version 2013, Issue 2 (Serbian translation)

SUMMARY

This guide is intended to cover market control of e-marked products. The guide may also be used for non-e-marked products that (based on national legislation) should comply with the same requirements.

This guide has been produced with a view to achieving a consistent level of market control in respect of e-marked pre-packages throughout the EU/EEA. Directives 76/211/EEC and 75/106/EEC, together with 80/232/EEC, constitute the legal basis for pre-packages sold by weight or volume in the EEA and Switzerland.

The guide is intended for those who prepare, organise and carry out market control functions, which is a type of metrological supervision that is directed to pre-packages, which are placed on the market, or are intended to be placed on the market, in order to ensure conformity of the products with the requirements.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.7, Version 2008, Issue 1 (English)
Guide No. 6.7, Version 2008, Issue 1 (Serbian translation)

SUMMARY

This guidance sets out requirements, sampling plans and test procedures for the verification of drained weights, drained washed weights and drained deglazed weight (hereafter referred to as ‘drained weight’) which can be used by those involved in their monitoring and regulation.

Additional guidance is provided for manufacturers who are obliged to control their filled weights in a manner which ensures the achievement of drained weight targets.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.8, Version 2020 (English)

Former versions

Guide No. 6.8, Version 2006 (English)
Guide No. 6.8, Version 2006 (Serbian translation)

SUMMARY

The Directive 76/211/EEC, relating to ‘e’-marked prepackages, requires that Competent Departments carry out checks at the packers’ and importers’ premises. When carrying out these checks the error made in measuring the actual contents of a prepackage shall not exceed one-fifth of the tolerable negative error for the nominal quantity in the prepackage.

This guide explains how to estimate the measurement error or uncertainty of measurement to ensure that this requirement is met.

AUTHORED BY: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.9, Version 2009, Issue 1 (English)
Guide No. 6.9, Version 2009, Issue 1 (Serbian translation)

SUMMARY

This document aims to make transparent the different ways by which the European Legal Metrology Cooperation Members and Associate Members have implemented the amended legislation and how they control other prepacked product.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.10, Version 2011, Issue 1 (English)
Guide No. 6.10, Version 2011, Issue 1 (Serbian translation)

SUMMARY

This document aims to make transparent the different ways by which the European Legal Metrology Cooperation Members and Associate Members have implemented the amended legislation and how they control other prepacked product.

AUTHORED BY: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.11, Version 2013, Issue 2 (English)
Guide No. 6.11, Version 2013, Issue 2 (Serbian translation)

SUMMARY

This document is intended to give guidance to manufacturers of MCB and authorities responsible for ensuring compliance with the requirements of the Directive and how they can be met.

The document also considers the International Organisation for Legal Metrology’s recommendation for MCB.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.12, Version 2013, Issue 1 (English)

SUMMARY

WELMEC Working Group 6 was set up to discuss, and propose solutions for, the problems associated with the trading of ℮-marked prepacked products (herafter called ‘prepackages’) between Member States.

It was decided by the WELMEC Committee to provide guidance for Competent Departments and economic operators to ensure that imported prepackages comply with legal requirements.

This guide is to address all the issues found in the imported prepackages project carried out by WELMEC WG 6 in 2011. The intention of this guide is to achieve a uniform level of enforcement and ensure that all prepackages, whether packed in, or imported into, the Community (herafter called ‘Union’) meet the applicable metrological requirements. 

This guide is part of a series of guides published by WELMEC, which are primarily intended to provide guidance to all those concerned with the application of Directive 76/211/EEC for prepacked products. These guides are intended to lead to a uniform interpretation and enforcement of this directive and assist in the removal of barriers to trade.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.13, Version 2017, Issue 1 (English)

SUMMARY

An indication of the nominal quantity of prepacked products is required by Directive 76/211/EEC  (hereafter referred to as ‘the Directive’). Prepackages must bear an indication of the weight or volume of the product, known as ‘nominal weight’ or ‘nominal volume’, which they are required to contain.  

The Directive does not refer to products sold by ‘number’ or in units of ‘length’ or ‘area’.

Currently, except for food, wines and spirits, European legislation does not provide specific requirements which relate to units of measurement to be used for particular groups of products; the legislation relates only to product consistency: liquid or non-liquid.

To solve any existing problems of interpretation or of marking semi-solid products, guidance on the interpretation of the Directive is therefore necessary.

AUTHORS: Working Group 6

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 6.14, Version 2018 (English)

SUMMARY

The document provides guidance to all those concerned with the application of the Measuring Instruments Directive (MID), especially for software-equipped measuring instruments. It addresses both, manufacturers of measuring instruments and notified bodies which are responsible for conformity assessment of MID instruments.

By following the Guide, a compliance with the software-related requirements contained in the MID (e.g. Annex I, 7.6, 8.3, 8.4) can be assumed, and it can be further assumed that all notified bodies will accept this Guide as a compliant interpretation of the MID with respect to software.

The Guide in hand is based on the “Software Requirements and Validation Guide”, Version 1.00, 29 October 2004, developed and delivered by the European Growth Network “MID-Software”. The Network was supported from January 2002 to December 2004 by the EU commission under the contract number G7RT-CT-2001-05064.

The Guide is purely advisory and does not itself impose any restrictions or additional technical requirements beyond those contained in the MID. Alternative approaches may be acceptable, but the guidance provided in this document represents the considered view of WELMEC as to a good practice to be followed.

Although the Guide is oriented on instruments included in the regulations of the MID, the results are of a general nature and may be applied beyond.

AUTHORS: Working Group 7

Unless otherwise stated, the English version of each publication should be taken as the official version.


NOTE

The newest version of WELMEC Guide 7 'Software' considers the latest experience gained from the applications of the Guide and is therefore the official version confirmed by the WELMEC Committee. Former versions are made available for reference purposes only.


Downloads

Guide No. 7.2, Version 2020 (English)

Former versions

Guide No. 7.2, Version 2019 (English
Guide No. 7.2, Version 2018 (English)
Guide No. 7.2, Version 2015 (English)
Guide No. 7.2, Version 2015 (Czech translation)
Guide No. 7.2, Version 2015 (German translation)

SUMMARY

The aim of the Guide is to provide an architectural template for mapping measuring instrument designs based on new technological developments to the requirements of WELMEC Guide 7.2. 

Founded on this template architectural examples for innovative approaches in measuring instruments could be modelled. Models of specific reference architectures are already provided in the Guide and it is envisioned to add further reference architectures according to the needs of the stakeholders.

AUTHORS: Working Group 7

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 7.3, Version 2020 (English)

Former version

Guide No. 7.3, Version 2019 (English)

SUMMARY

The Guide provides specific technical solutions for selected general architectures of instruments (see WELMEC Guide 7.3) and indicates how these acceptable solutions fulfill the requirements laid down in WELMEC Guide 7.2. In doing so, it also illustrates the requirements laid down in WELMEC Guide 7.2 on a technical level.  

AUTHORS: Working Group 7

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 7.4, Version 2020 (English)

Former version

Guide No. 7.4, Version 2019 (English)

SUMMARY

This document is intended to provide guidance on the software requirements in accordance with the Non-automatic Weighing Instruments Directive (NAWID) 2014/31/EU. Produced by the WELMEC cross-sectional group WG2-WG7, the guidance provided in this document is based on the 17th resolution of the 33rd WELMEC Committee meeting 2017. There, the WELMEC Committee emphasised the fact that the software-related Essential Requirements of NAWIs could be fully covered by a subset of the software related Essential Requirements of the Measuring Instruments Directive (MID) (2014/32/EU).

AUTHORS: Working Group 7 and Working Group 2

Unless otherwise stated, the English version of each publication should be taken as the official version.


NOTE

Guide 7.5 replaces WELMEC Guide 2.3 "Guide for Examining Software (Weighing Instruments)".


Downloads

Guide No. 7.5, Version 2020 (English)

SUMMARY

The guide must be considered as the general guide on the assessment and operation of notified bodies performing conformity assessment in application of MID and NAWID.

Several other guides have been established for the detailed application of some conformity assessment modules of the two Directives. These guides should not be read without taking into consideration all relevant aspects in all the guides related to a module.

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 8.0, Version 2016 (English)

SUMMARY

This document provides terms and expressions with metrological relevance in the English version of the Measuring Instruments Directive 2004/22/EC and compares these terms and expressions with those used in other relevant documents like Recommendations of the International Organisation of Legal Metrology (OIML), the International Vocabulary of Metrology (VIM), and relevant international and European standards. In particular the “closest synonyms” will be referred to.

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.1, Version 2020 (English)

Former version

Guide No. 8.1, Version 2006, Issue 1 (English)

SUMMARY:

This document was written to provide guidance for all those concerned with the application of the Module H1 of the Measuring Instruments Directive. It provides guidance for manufacturers of measuring instruments, notified bodies responsible for conformity assessment and the notifying authorities.

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.2, Version 2018 (English)

Former version

Guide No. 8.2, Version 2006 (English)

 

SUMMARY

This guide is one of those which complete the general guide on the assessment and operation of notified bodies performing conformity assessment in application of the Measuring Instrument Directive (MID) and the Non-Automatic weighing instruments Directive (NAWID).   

Several guides have been established for the detailed application of some modules of MID and the NAWID, see the WELMEC website. These guides should not be read without taking into consideration all relevant aspects in all the guides related to a module.   

This guide is intended to provide guidance to all those concerned with the application of module B, EU-type examination, of the Directive 2014/32/EU and Directive 2014/31/EU.  

This Guide covers both directives, the MID and the NAWID, although small differences exist in the text of Module B of the MID compared with the text in the NAWID.  Also, the numbering of the articles is not the same.  

For this guide the text and numbering of the articles of the MID is used. In Annex 3 of this guide a table is given with the correct text and numbering of Module B of the MID and the NAWID which also highlights the differences between these two texts. 

If the documents mention measuring instruments than both NAWI and MI under the MID is meant.

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.3, Version 2017 (English)

Former version

Guide No. 8.3, Version 2007 (English)
Guide No. 8.3, Version 2007 (French translation)
Guide No. 8.3, Version 2007 (Serbian translation)

SUMMARY

This guide is one of those which complete the general guide on the assessment and operation of notified bodies performing conformity assessment in application of the Measuring Instruments Directive (2014/32/EU; MID) and the directive on non-automatic weighing instruments (2014/31/EU; NAWID). Several guides have been established for the detailed application of some modules of MID. These guides should not be read without taking into consideration all relevant aspects in all the guides related to a module. In order to facilitate the understanding of the whole set of guides, a table is provided in Annex 1 of WELMEC 8.0. 

This guide is intended to provide guidance to all those concerned with the application of Annex II Module D (for simplicity referred to as Module D) of MID and NAWID. It provides guidance for manufacturers, notified bodies responsible for conformity assessment and the notifying authorities. 

For more information on the requirements applicable to the quality systems of manufacturers, the specific WELMEC Guide 8.6 Presumption of conformity of the quality system of manufacturers with Modules D or H1 when EN ISO 9001:2015 is applied should  be considered. 

The Guide is purely advisory and does not impose any restrictions or additional technical requirements beyond those contained in the MID or NAWID. Alternative approaches may be acceptable, but the guidance provided in this document represents the considered view of WELMEC as to the best practice to be followed. However it is intended that the procedures as described in the guide must be followed if it is to be claimed that the guide has been applied. 

In many cases the manufacturer will already have an appropriate quality system in place. The task for the notified body will then be to build on the work done by the body certifying the quality system, taking into account all the specific requirements of Annex II Module D, and to have a particular focus on the legal metrology application. In this way the notified body will avoid duplicating work that already has been done by a certification body. (See WELMEC Guide 8.6 Presumption of conformity of the quality system of manufacturers with modules D or H1 when EN ISO 9001:2015 is applied)

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.4, Version 2017 (English)

Former version

Guide No. 8.4, Version 2007 (English)
Guide No. 8.4, Version 2007 (French translation)
Guide No. 8.4, Version 2007 (Serbian translation)

SUMMARY

This guide is one of those which complete the general guide on the assessment and operation of notified Bodies performing conformity assessment in application of 2014/31/EU directive (hereinafter as the “NAWID”) and 2014/32/EU directive (hereinafter as the “MID”). Several guides have been established for the detailed application of some modules of MID and NAWID. These guides should not be read without taking into consideration all relevant aspects in all the guides related to a module. 

The Guide is purely advisory and does not impose any restrictions or additional technical requirements beyond those contained in the MID and NAWID. Alternative approaches may be acceptable, but the guidance provided in this document represents the considered view of WELMEC as to the best practice to be followed. However, it is intended that the procedures as described in the guide must be followed if it is to be claimed that the guide has been applied.

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.5, Version 2018 (English)

Former versions

Guide No. 8.5, Version 2017 (English)
Guide No. 8.5, Version 2007 (English)
Guide No. 8.5, Version 2007 (Serbian translation)

 

SUMMARY

This document is intended to provide guidance in order to facilitate harmonised approvals of quality systems of manufacturers for application of module D or of module H1 of MID. As the conformity to EN ISO 9001: 2015 appears to-day the most appropriate generic standard in order to give presumption of conformity, this document is built according to the structure of this standard. Only the titles of this standard are referred in.

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.6, Version 2018 (English)
Guide No. 8.6, Version 2018 (German translation)

Former versions

Guide No. 8.6, Version 2007 (English)
Guide No. 8.6, Version 2007 (Serbian translation)

 

SUMMARY

This document is intended to provide guidance in order to facilitate harmonised assessment of notified bodies (NB) in charge of declaration of conformity to type based on product verification that is module F of MID. As the conformity to EN ISO/IEC 17020 appears to be one of the two most appropriate generic standards in order to give presumption of conformity for this activity, this document is built according to the structure of this standard.

AUTHORED BY: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.7, Version 2018 (English)

Former versions

Guide No. 8.7, Version 2008 (English)
Guide No. 8.7, Version 2008 (Serbian translation)

SUMMARY

This guide deals with the general and administrative aspects of the voluntary system of modular evaluation of measuring instruments under the Non-Automatic Weighing Instruments Directive (NAWID) and the Measuring Instruments Directive (MID). 

This guide is only intended for the evaluation of parts that can be subject to the voluntary system of modular evaluation of the measuring instrument and should not be abused as a guide for modular certification of the whole measuring instrument.  

Although the system of modular approach for measuring instruments is voluntary, it is intended that the procedures as described in this guide shall be followed if Certificates are issued under the scope of this guide. 

  • It is reminded that the issuing of an EC, PC, PER, ER for a part by another notified body doesn't prejudge full responsibility of the notified body responsible for the conformity assessment of the complete measuring instrument.  
  • It is also reminded that it is the manufacturer of the complete instrument who is responsible for designing and manufacturing the measuring instrument in conformity with the requirements. 
  • Even if modular evaluation is used, the manufacturer shall apply for a conformity assessment procedure for the complete measuring instrument. 
  • The part may bear the applicable CE marking according to Directives other than the MID or NAWID and after evaluation the EC or PC number, but it cannot bear the supplementary metrology marking and notified body number relating to the MID or the NAWID.  

The original guide dates from December 2008.  

The revision to version 2 of the guide in 2011 has been made to include non-automatic weighing instruments under the voluntary evaluation of parts and to extend the scope of the voluntary evaluation of parts to module D, F and G of the MID and the NAWID. 

The revision to version 3 in 2017 was made to implement the changes in the revised Non-Automatic Weighing Instruments Directive, 2014/31/EU (NAWID) and the revised Measuring Instruments Directive 2014/32/EU (MID) and to include a procedure with respect of a revision of an Evaluation or Part Certificate.

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.8, Version 2017 (English)
Guide No. 8.8, Version 2017 (German translation)

Former versions

Guide No. 8.8, Version 2011 (English translation)
Guide No. 8.8, Version 2011 (French translation)
Guide No. 8.8, Version 2011 (German translation)
Guide No. 8.8, Version 2011 (Serbian translation)
Guide No. 8.8, Version 2011 (Spanish translation)

SUMMARY

This guide is intended to provide guidance to all those concerned with the capacity serving measures (CSM) of the Measuring Instruments Directive (MID). It provides guidance for manufacturers of measures, notified bodies (NBs) responsible for conformity assessment and the notifying authorities.

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.9, Version 2020 (English)

Former version

Guide No. 8.9, Version 2017 (English)

Guide No. 8.9, Version 2010 (English)

SUMMARY

Annex F of MID describes conformity assessment procedures, where a notified body chosen by the manufacturer carries out the appropriate examinations and tests, or have them carried out, to check the conformity of the instruments with the type as described in the EC-type examination certificate and the appropriate requirements of this Directive.

Annex F1 of MID describes conformity assessment procedures, where a notified body carries out the appropriate examinations and tests, or have them carried out, to check the conformity of the instruments with the appropriate requirements of this Directive.

Verification can be done by examination and testing of every instrument in accordance with MID Annex F, section 4 or Annex F1, section 6 or by statistical verification in accordance with MID Annex F, point 5 or Annex F1, point 7.

Typical applications for statistical verification are material measures (Annex MI-008) or electronic electricity meters (Annex MI-003). Statistical verification is based on sampling plans agreed between notified bodies and manufacturers taking into account the provisions given in MID, Annex F or F1.

This Guide is intended to support notified bodies when creating suitable sampling plans for conformity assessment acc. to Annex F and F1, statistical methods can also be used for Annexes A1  or for Annexes D, D1, E, E1, H and H1 .

The Guide provides a practicable tool for the application of already existing documents and standards (in particular ISO 2859) with regard to MID conditions.

This Guide is intended to improve understanding and applicability of standards for non-professionals and does make no claim to be complete. 

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.10, Version 2018 (English)

Former version

Guide No. 8.10, Version 2011 (English)

 

SUMMARY

This guide is intended to provide guidance to all those concerned with the application of Measuring Instruments Directive 2004/22/EC (MID), as amended by Directive 2009/137/EC, on measuring instruments.

This guide provides a record of the continuing work of WELMEC Working Group 8 in the area of the common application of the Directive itself, when not already covered by a specific guide. In addition this guide seeks to provide information, which is specific to individual Member States.

AUTHORS: Working Group 8

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 8.21, Version 2020 (English)

Former Versions

Guide No. 8.21, Version 2012, Issue 1 (English)
Guide No. 8.21, Version 2012, Issue 1 (Serbian translation)
Guide No. 8.21, Version 2012, Issue 1 (Spanish translation)

SUMMARY

This document provides metrological and technical requirements for devices for transferring measured quantities (DTMQ) associated to bottom loading measuring systems, as defined in 2.1.

This document is not binding for countries, which would apply other solutions for transferring measured quantities, in particular solutions based on the implementation of procedures of good practices.

AUTHORS: Working Group 10

Unless otherwise stated, the English version of each publication should be taken as the official version.


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Guide No. 10.2, Version 2019 (English)

Former version

Guide No. 10.2, Version 2001 (English)
Guide No. 10.2, Version 2001 (French translation)

SUMMARY

This document gives guidance for marking for fuel dispensers (including LPG dispensers) to be installed at filling stations which are used to dispense liquid fuel into the tanks of motor vehicles, boats, light aircrafts and portable containers.

The here given marking guidance is based on the MID and the OIML R 117, Edition 2007.

AUTHORS: Working Group 10

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 10.5, Version 2020 (English)

Former Version

Guide No. 10.5, Version 2006, Issue 1 (English)

SUMMARY

This guide gives guidance for sealing of fuel dispensers (including LPG dispensers) to be installed at filling stations which are used to dispense liquid fuel into the tanks of motor vehicles, boats, light aircraft, and portable containers.

The here given sealing guidance is based on the European Directive for Measuring Instruments and the OIML recommendation R117 (1995) and R117-1 (2007).

AUTHORS: Working Group 10


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Guide No. 10.6, Version 2019 (English)

Former version

Guide No. 10.6, Version 2008 (English)
Guide No. 10.6, Version 2008 (Spanish translation)

 

SUMMARY

This document is intended to provide guidance to all those concerned with the application of MID Annex MI-005 and/or OIML International Recommendation R 117-1 'Dynamic Measuring Systems for Liquids other than Water'.

This document provides a record of the continuing work of WELMEC Working Group 10 in the area of the common application of MID MI-005 and/or OIML R 117-1 itself and in addition seeks to provide information, which is specific to individual member countries.

Some of the decisions made, were based on the R 117 (1995). Where applicable, reference to the OIML R 117 (1995) articles is presented in strikethrough font and reference to the R 117-1 (2007) article has been added in regular font.

This document is one of a number of Guides published by WELMEC to provide guidance to manufacturers of measuring instruments and to bodies responsible for conformity assessment of their products.

The Guides are purely advisory and do not themselves impose any restrictions or additional technical requirements beyond those contained in OIML International Recommendation R 117. Alternative approaches may be acceptable, but the guidance provided in this document represents the considered view of WELMEC as to the best practice to be followed.

AUTHORS: Working Group 10

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 10.8, Version 2020 (English)

Former version

Guide No. 10.8, Version 2019 (English)

Guide No. 10.8, Version 2016 (English)

SUMMARY

Measuring systems for liquids other than water (MI) are often constructed from typical parts, such as gas separators, measurement transducers, electronic calculating / indicating devices, conversion devices and ancillary devices, produced by different Original Equipment Manufacturers (OEMs), in this document referred to as “producers”.

This document provides guidance on the evaluation of purely digital parts of a measuring system.

Note:   
WELMEC Guide 8.8 provides guidance on the general and administrative aspects of the voluntary system of modular evaluation of a measuring instrument.

AUTHORS: Working Group 10

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 10.10, Version 2019 (English)

Former version

Guide No. 10.10, Version 2016 (English)

AUTHORS: Working Group 10

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 10.11, Version 2019 (English)

AUTHORS: Working Group 10

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 10.12, Version 2019 (English)

SUMMARY

AUTHORS: Working Group 10

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 10.13, Version 2019 (English)

SUMMARY

The guide explains functioning and modes of evaluation of pre-setting devices as a part of Fuel Dispenser, used as measuring instruments for liquids other than water as specified by Annex VII (MI-005) of the Measuring Instrument Directive, 2014/32/EU (MID).

AUTHORS: Working Group 10

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 10.14, Version 2020 (English)

SUMMARY

This document is intended to provide guidance to all those concerned with the application of Measuring Instruments Directive 2004/22/EC, on utility meters.

This document provides a record of the continuing work of WELMEC Working Group 11 in the area of the common application of the Directive itself.

This document is one of a number of Guides published by WELMEC to provide guidance to manufacturers of measuring instruments and to Notified Bodies responsible for conformity as-sessment of their products.

The Guides are purely advisory and do not themselves impose any restrictions or additional technical requirements beyond those contained in relevant EC Directives. Alternative approaches may be acceptable, but the guidance provided in this document represents the considered view of WELMEC as to the best practice to be followed.

AUTHORES: Working Group 11

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 11.1, Version 2020 (English)

Former version

Guide No. 11.1, Version 2017 (English)

Guide No. 11.1, Version 2015 (English)

SUMMARY

The introduction of interval metering and its use for billing for residential, commercial and light industrial customers increases the need for ensuring consumer protection by the proper design of the meters and their functions.

The following generic recommendations will be an input of WELMEC to the standardisation of smart utility meters (electricity, gas, water and heat) and could be in part a suggestion for a future MID-annex with essential requirements for smart meter functionalities.

If a decision on MID or a harmonised standard on this issue is taken this Guide shall be revised accordingly.

The guide is purely advisory and do not themselves impose any restrictions or additional technical requirements beyond those contained in relevant EC Directives.

AUTHORS: Working Group 11

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 11.2, Version 2010, Issue 1 (English)
Guide No. 11.2, Version 2010, Issue 1 (Spanish translation)

SUMMARY

For the benefit of manufacturers, and all other interested parties, e.g. notified bodies under annex B, D, F and H1 of the MID, notifying authorities and market surveillance authorities, this document describes a best practise approach to securing utility meters covered under MI-001, MI-002, MI-003 and MI-004 of the MID.

It should be noted that it is the responsibility of the manufacturer of the utility meter to be able to demonstrate the conformity to all applicable requirements of the MID includ-ing conformity to the securing provisions of his utility meters to the requirements of MID.

If specific annexes exist in the MID, which lay down the essential requirements for sub-assemblies, the provisions of this guide shall apply mutatis mutandis to such sub-assemblies as it does for the complete measuring instruments under the MID.

This document is limited to the placing on the market or putting into use of utility meters by the manufacturer or his authorised representative.

If the meter is placed on the market by the manufacturer and the utility meter is installed by an installer, national legislations of the Member States apply. Depending on those national requirements specific action needs to be taken if it is made evident through the securing provisions that changes in the legally relevant parts, parameters or settings of the utility meter has been made.

This guide does not cover those national legislations (see also chapter 3 of this guide).

AUTHORS: Working Group 11

Unless otherwise stated, the English version of each publication should be taken as the official version.­


Downloads

Guide No. 11.3, Version 2020 (English)

Former version

Guide No. 11.3, Version 2012, Issue 1 (English)
Guide No. 11.3, Version 2012, Issue 1 (Serbian translation)
 

SUMMARY

For the benefit of manufacturers, and all other interested parties, e.g. Notified Bodies (designated under Annex B, D, F and H1 of the MID), notifying authorities and market surveillance authorities, this document describes a best practise approach relating to the information in the TEC, which is to be borne by and to accompany the gas meter.

This guide does not cover markings necessary under other relevant European Directives, such as but not limited to the ATEX directive, the EMC directive, the low-voltage directive and so on.

Utility companies can also require markings on the gas meters in order to facilitate the management of gas meters installed within the network. This guide does not deal with such markings.

This guide specifies the mandatory inscriptions as required by the MID and a best practise approach for specifying the information in the TEC, to be borne by and to accompany the gas meter that are considered necessary based on an interpretation of the essential requirements.

Alternative approaches may be acceptable, but the guidance provided in this document represents the collective and considered view of WELMEC as to the most appropriate practice to be followed.

AUTHORS: Working Group 11

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 11.4, Version 2020 (English)

Former version

Guide No. 11.4, Version 2015 (English)

SUMMARY

Today an increasing number of utility meters (gas measuring instruments, water measuring instruments, electricity measuring instruments, and heat measuring instruments) are connected to ancillary devices such as communication modules transmitting the totalized value by the measuring instrument to a server at the utility company.

Although many of these devices are by themselves not under the scope of the MID, article 8.1 of Annex I of the MID states that “the metrological characteristics of the measuring instrument shall not be influenced in any inadmissible way by connecting it to any other device, by any feature of the connected device itself or by any remote device that communicates with the measuring instrument”.

Based on article 8.1 of Annex I of the MID the manufacturers should therefore define conditions under which ancillary devices can be connected to the measuring instrument. This needs to be evaluated by a Notified Body.

This guide aims to provide guidance on the conditions needed to be specified to allow a measuring instrument to be connected to a device and the evaluation based on those conditions by the Notified Body.

AUTHORS: Working Group 11

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 11.5, Version 2015 (English)

GUIDE SUMMARY

Volume conversion devices are often constructed from separate parts, such as for example the calculator, pressure transducers and temperature transducers. Those parts are produced by different Original Equipment Manufacturers (OEMs), in this document referred to as “producers”.

This document provides guidance on the evaluation of the above mentioned parts of an electronic volume conversion device.

This WELMEC Guide 11.6 is used in combination with:

  • WELMEC Guide 8.8, which provides guidance on the general and administrative aspects of the voluntary system of modular evaluation of a measuring instrument.
  • WELMEC Guide 7.2, which provides guidance on software requirements and validation.

Other references

  • EN 12405-1/A2 (2010) “Gas meters – Conversion devices – Part 1: volume con-version”

AUTHORS: Working Group 11

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 11.6, Version 2018 (English)

Former versions

Guide No. 11.6, Version 2017 (English)
Guide No. 11.6, Version 2015 (English)

SUMMARY

Active electrical energy meters may be constructed from separate parts, such as a measuring and calculating part, an indicating part and a (communication) module. Those parts may be produced by different Original Equipment Manufacturers (OEMs), in this document referred to as 'producers'.

This document provides guidance on the evaluation of the above mentioned parts of an active electrical energy meter.

WELMEC Guide 11.7 is used in combination with

  • WELMEC Guide 8.8, which provides guidance on the general and administrative aspects of the voluntary system of modular evaluation of a measuring instrument.
  • WELMEC Guide 7.2, which provides guidance on software requirements and validation.

Other references

  • EN 50470-1 'Electricity metering equipment (a.c.) – Part 1: General require-ments, tests and test conditions – Metering equipment (class indexes A, B and C)'
  • EN 50470-3 'Electricity metering equipment (a.c.) – Part 3: Particular require-ments – Static meters for active energy (class indexes A, B and C)'
  • EN 61000-4-19 'Electromagnetic compatibility (EMC) – Part 4-19: Testing and measurement techniques – Test for immunity to conducted, differential mode disturbances and signaling in the frequency range 2 kHz to 150 kHz at a.c. power ports'
  • TR 50579 'Electricity metering equipment (a.c.) - Severity levels, immunity re-quirements and test methods for conducted disturbances in the frequency range 2 kHz - 150 kHz'

AUTHORS: Working Group 11

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 11.7, Version 2017 (English)

SUMMARY:

The aim of this guide is to provide an introduction to the usage of auxiliary power in electricity meters and some of the relevant essential requirements of MID.

The document also provides guidance for the Conformity Assessment of electricity meters operating with an external power supply.

AUTHORS: Working Group 11

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 11.8, Version 2018 (English)

SUMMARY

This guide is intended to provide guidance to all those concerned with the application of annex I and annex IX Taximeters (MI-007) of Directive 2014/32/EU (MID), recast of Directive 2004/22/EC.

This guide provides a record of the continuing work of WELMEC Working Group 12 (former WG 8 subgroup) on Taximeters in the area of the common application of the Directive itself, as a specific guide for taximeters.

In addition this guide seeks to provide information, which is specific to individual Member States.

This guide is one of a number of guides published by WELMEC to provide guidance to manufacturers of measuring instruments and to Notified Bodies responsible for conformity assessment of their products.

The guides are purely advisory and do not themselves impose any restrictions or additional technical requirements beyond those contained in relevant EU Directives. Alternative approaches may be acceptable, but the guidance provided in this document represents the considered view of WELMEC as to the best practice to be followed.

AUTHORS: Working Group 12

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 12.1, Version 2020 (English)

Former Version

Guide No. 12.1, Version 2017 (English)

SUMMARY

 

AUTHORS: Working Group 13

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 13.1, Version 2020 (English)

SUMMARY

 

AUTHORS: Working Group 13

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 13.2, Version 2020 (English)

SUMMARY

 

AUTHORS: Working Group 13

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 13.3, Version 2020 (English)

Withdrawn Guides

The Guide has been withdrawn and is available for references purposes only. The Guide is superseded by WELMEC Guide 2.

SUMMARY

This revised document is intended to provide guidance to all those concerned with the application of Council Directive 90/384/EEC as amended by Directive 93/68/EEC on Non-automatic Weighing Instruments.

The document provides a record of the continuing work of WELMEC Working Group 2 in the area of the common application of the Directive itself and in addition seeks to provide information which is specific to individual member countries.

AUTHORS: Working Group 2

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 2.1, Version 2001, Issue 4 (English)
Guide No. 2.1, Version 2001, Issue 4 (German translation)
Guide No. 2.1, Version 2001, Issue 4 (Serbian translation)

The Guide has been withdrawn and is available for references purposes only. The Guide is superseded by WELMEC Guide 2.

SUMMARY

The EC Directive 90/384/EEC states some essential requirements for the protection against changes, manipulation or fraudulent use of non-automatic weighing instruments (NAWIs) which, in principle, have to be applied also to the software controlling these instruments:

(i) Annex I, No 8.1, Directive 90/384/EEC: Design and construction of the instruments shall be such that the instruments will preserve their metrological qualities when properly used and installed, and when used in an environment for which they are intended.
(ii) Annex I, No 8.5, Directive 90/384/EEC: The instruments shall have no characteristics likely to facilitate fraudulent use, whereas possibilities for unintentional misuse shall be minimal. Components that may not be dismantled or adjusted by the user shall be secured against such actions.
(iii) Annex II, No. 1.7, Directive 90/384/EEC: The applicant shall keep the notified body that has issued the EC type-approval certificate informed of any modification to the approved type.

AUTHORS: Working Group 2

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 2.3, Version 2005, Issue 3­ (English)
Guide No. 2.3, Version 2005, Issue 3 (Serbian translation)

The Guide has been withdrawn and is available for references purposes only. The Guide is superseded by WELMEC Guide 2.

SUMMARY

The European Standard on NAWI: EN 45501 contains the metrological and technical requirements for NAWI subject to legal metrological control that provide presumption of conformity to the essential requirements of Directive 90/384/EEC.

EN 45501, which is identical to the OIML recommendation R76 in content, has introduced the concept of modular approach. Subject to agreement between the manufacturer and the notified body for EC type examination, modules may be defined and examined separately (see 8.1 of EN 45501).

AUTHORS: Working Group 2

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 2.5, Version 2000, Issue 2 (English)
Guide No. 2.5, Version 2000, Issue 2 (French translation)
Guide No. 2.5, Version 2000, Issue 2 (German translation)
Guide No. 2.5, Version 2000, Issue 2 (Serbian translation)

The Guide has been withdrawn and is available for references purposes only. The Guide is superseded by WELMEC Guide 2.

SUMMARY

This document provides explanation and interpretation in respect of the provisions contained in Council directive 90/384/EEC on non-automatic weighing instruments. It does not provide a systematic treatment of all provisions of the directive, rather deals only with those of the directive’s elements of which experience has shown that further clarification was needed.

The document will assist all interested parties in correctly interpreting and applying this piece of community legislation: Member States of the European Union and Signatories of the Agreement on the European Economic Area, who transposed the directive in their respective national legislations; manufacturers of non-automatic weighing instruments, whether established in the European Economic Area or in third countries; users of non-automatic weighing instruments; consumers.

AUTHORS: Working Group 2

Unless otherwise stated, the English version of each publication should be taken as the official version.


Downloads

Guide No. 2.7, Version 2006, Issue 1 (English)
Guide No. 2.7, Version 2006, Issue 1 (French translation)
Guide No. 2.7, Version 2006, Issue 1 (German translation)
Guide No. 2.7, Version 2006, Issue 1 (Serbian translation)

The Guide has been withdrawn and is available for references purposes only.

SUMMARY

This guide gives advice on the use of particular quality standards within the EN-45000 series for each conformity assessment module. The overall aim is that all valid combinations of the quality standards and modules featured here shall give the same confidence in the work performed by the notified body.

Annex 1 to this guide is a flow diagram which illustrates the conformity assessment options allowed by 90/384, together with the supporting structure of operational bodies and standards.

AUTHORS: Working Group 4


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Guide No. 4, Version 1999, Issue 2 (English)

The Guide has been withdrawn and is available for references purposes only.

SUMMARY

Member states of the European Economic Area have implemented the Council Directives 75/106/EEC of 19 December 1974 and 76/211/EEC of 20 January 1976 in their national legislation. The directives deal with marking and quantity control of e-marked prepackages.

The series of documents intends to provide guidance to all those concerned with the application of directives 75/106 and 76/211/EEC on e-marked prepackages.

They will lead to a uniform interpretation and enforcement of these directives and assist in the removal of barriers to trade.

AUTHORS: Working Group 6


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Guide No. 6.2, Version 1997, Issue 1 (English)
Guide No. 6.2, Version 1997, Issue 1 (Serbian translation)

 

The Guide has been withdrawn and is available for references purposes only.

SUMMARY

This revised document is intended to provide information about the development of software requirements based on the Measuring Instruments Directive. Up to the publication of the MID in April 2004 this guide was used as a basis for national type approval in some European countries. Therefore, the responsible Working Group 7 'Software' has decided during its 9th meeting in 2004 not to withdraw the Guide but to keep it as an informative document with updated cross-references to the final MID text and to bring it in line with the new WELMEC Software Guide 7.2.

For software examination and software testing of MID instruments WELMEC 7.1, issue 2, shall not be applied. Instead WELMEC Guide 7.2 is the recommended WELMEC document that should be used for MID conformity assessments of software controlled instruments.

During the 31st WELMEC Committee meeting the Committee agreed to withdraw Guide 7.1, mark it for reference purpose only.

AUTHORS: Working Group 7


Downloads

Guide No. 7.1, Version 2005, Issue 2 (English)
Guide No. 7.1, Version 2005, Issue 2 (Serbian translation)

 

The Guide has been withdrawn. The testing requirements can now be found in OIML R117-2, Edition 2014.

The Guide has been withdrawn and is available for references purposes only. The Guide is superseded by WELMEC Guide 10.10.

SUMMARY

This Guide for the use of an alibi recording device (printer or memory) in Measuring Systems for Liquids other than Water is the result of many discussions during WELMEC WG 10 meetings.

It was a wish from many delegates to use as much as possible the terminology and philosophy from WELMEC Guide 2.5 for modular approach and testing of PC's and other digital peripheral devices (Non-automatic Weighing Instruments). The approach followed in this Guide 10.3 is similar to the approach of point 3.1, 3rd and 4th paragraph, of WELMEC Guide 2.5.

AUTHORS: Working Group 10


Downloads

Guide No. 10.3, Version 2003, Issue 1 (English)

The Guide has been withdrawn and is available for references purposes only. The requirements can be found in OIML R117-1, Edition 2007.

SUMMARY

This Guide describes the test procedures for type approval and initial verification of electronic calculators with conversion function and conversion devices (flowcomputers) respectively associated measuring instruments (e.g. temperature, pressure and/or density transmitters) for application in measuring systems for liquids other than water.

For the benefit of separate testing, the applicable partial maximum permissible errors (MPE's) and significant faults / critical change values (SF's / CCV's) are given.

AUTHORS: Working Group 10


Downloads

Guide No. 10.4, Version 2006, Issue 1 (English)

The Guide has been withdrawn and is available for references purposes only. The Guide is superseded by WELMEC Guide 10.10.

SUMMARY

Measuring instruments for liquids other than water (MI) are often constructed from typical parts, such as gas separators, measurement transducers, electronic calculating / indicating devices and self-service devices, produced by different Original Equipment Manufacturers (OEMs), in this document referred to as “producers”.

This document provides a guide for evaluating purely digital self-service devices (SSD) for direct sales to the public. The digital SSD as defined under this guide is not  required to ensure correct measurement or intended to facilitate the measuring operations, or could not in any way affect the measurement.

Note: The general and administrative aspects of the voluntary system of modular evaluation of measuring instrument are given in WELMEC Guide 8.8. This guide states that for an Evaluation Certificate (EC) or Part Certificate (PC) to be issued a test institute only has to perform the functional and software tests on purely digital SSD under the following conditions:

  • the hardware of the SSD bears the CE-mark
  • the purely digital SSD does not include the power supply for the MI
  • the price calculation is performed by the fuel dispenser
     

If these conditions are not met the SSD cannot be evaluated according to this guide. If during evaluation it is also established that not all of the checking facilities are present then an EC or PC under this guide cannot be issued.

AUTHORS: Working Group 10


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Guide No. 10.7, Version 2011, Issue 1 (English)

The Guide has been withdrawn and is available for references purposes only. The Guide is superseded by WELMEC Guide 10.10.

SUMMARY

This guide only covers separate purely digital ancillary devices used in measuring instruments for liquids other than water, which are not a self-service device[1] for use with fuel dispensers and takes no part in the determination of the measuring value of the MI. This excludes for example but not limited to, calculator/indicator and conversion devices[2].

By purely digital is meant that the electronic device only performs digital functions and provides a digitised output or display.
The fact that the digital ancillary device should only "perform digital functions" means that the device does not have analogue inputs and does not include time dependant data acquisition for the measurement and thus that the disconnection of the device during the measurement does not impact the measurement results.

[1] The purely digital self-service device for fuel dispensers is covered by WELMEC Guide 10.7.
[2] Electronic Calculators with Conversion Function and Conversion Devices are covered by WELMEC Guide 10.4.

AUTHORS: Working Group 10


Downloads

Guide No. 10.9, Version 2014, Issue 1 (English)

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