• Measuring Instruments Release time: 2016/7/27 View: 1035
  • About the measuring instruments sector
    Measuring instruments are essential to a number of areas directly or indirectly affecting people’s lives: public health and safety, public order, environmental and consumer protection and the administration of taxes and levies, among others.
    European Union policy with regard to measuring instruments is centred on the harmonisation of legal metrology, and the technical and administrative procedures through which public authorities guarantee the quality of measurements made. The presence of the CE marking on measuring instruments is an indication that they meet the harmonised requirements in place allowing them to be sold anywhere in the European Economic Area (made up of the EU countries plus Norway, Iceland and Liechtenstein) as well as in Turkey. This also applies to products manufactured in third countries.
    CE marking and the Directive on Measuring Instruments
    In 2004 the EU adopted a new Directive which replaced all the previous pieces of legislation adopted since the 1970s at EU level in this area. Directive 2004/22/EC, which entered into force on 30 October 2006, is intended to remove obstacles to the sale of measuring instruments within the EU by harmonizing legal metrology requirements.
    The Directive covers the following measuring devices and systems: water meters, gas meters and volume conversion devices, active electrical energy meters, heat meters, measuring systems for continuous and dynamic measurement of quantities of liquids other than water, automatic weighing instruments, taximeters, material measures, dimensional measuring instruments and exhaust gas analysers.
    The general harmonised legal metrology requirements are set out in Annex I of the Directive, while additional requirements for each type of measuring instrument are presented in the 10 sector-specific Annexes (MI-001 to MI-010).
    Legally controlled measuring instruments satisfying the previously applicable rules can still be placed on the market in EU Member States during a transitional period of ten years from the day the Directive entered into force.
    on the road to CE marking – conformity assessment
    Annexes A to H1 of the Directive list 14 types of conformity assessment procedure for measuring instruments, ranging from an internal production control to a full quality assurance plus design examination
    Manufacturers must refer to the 10 sectorspecific Annexes to see which of the 14 types of conformity assessment they can apply. For example, manufacturers of water meters can choose from the procedures set out in the following Annexes: B+F; B+D; or H1
    Once the relevant conformity assessment procedure has been completed, the manufacturer must affi x the CE marking to the measuring instrument. It must be accompanied by supplementary metrology marking consisting of the capital letter ‘M’ and the last two digits of the year of its affi xing, surrounded by a rectangle. Both markings must be at least 5mm in height. If a Notifi ed Body has been involved in the conformity assessment procedure, its identifi cation number must also be displayed.
    If the measuring instrument consists of multiple devices operating together, the markings are required to be affi xed on the main device. If a measuring instrument is too small or too sensitive to carry these markings, they can be placed on the packaging and accompanying documents. The markings must be indelible and clearly visible/ easily accessible.