EHMA

EHMA

bofcon Bo Frank Consulting June 2005

European requirements

and practice

in heat metering

by Bo Frank EHMA

EHMA European requirements and practice in heat metering


Who is Bo Frank? Representative of EHMA 25 years within the Heat Meter technology 20 years at one of the EHMA companies mainly as product manager

Now self-employed: working as technical consultant working as a convenor in CEN / TC176 / WG2 making the technical editing for EN 1434 the European standard for Heat Meters participated in the work with MID and OIMLr75 for Heat meters



EU Measuring Instrument Directive MID




European standard for Heat Meters EN 1434





Time schedule and transitional provisions





Time schedule and transitional provisions

National regulations for reverification of meters in use




Adopted a year ago

If national regulations – then based on MID

New approach: standards and normative documents used as support.




Adopted a year ago

If national regulations – then based on MID

New approach: standards and normative documents used as support.

Essential requirements – not only pure metrological requirements

Requirements on - the meter - the meter manufacturer - the meter user (heat supplier or meter installer)




Essential requirements – not only pure metrological requirements:

7.2 A measuring instrument shall be suitable for its intended use taking account of the practical working conditions and shall not require unreasonable demands of the user in order to obtain a correct measurement result.

…..7.5 A measuring instrument shall be robust and its materials of construction shall be suitable for the conditions in which it is intended to be used.



EU Measuring Instrument Directive MID Requirements on - the meter manufacturer:

(7) The responsibilities of the manufacturer for compliance with the requirements of this Directive should be specifically stated.

To be able to make the initial verification in a testing laboratory in connection with the manufacturing the manufacturer must have an approved quality system for production and final testing. In other case the final testing must be done by an approved testing house independent of the manufacturer as well as the user.



EU Measuring Instrument Directive MID Requirements on - the meter user (heat supplier or meter installer)

The government authorities shall ensure that the appropriate measuring range for a Heat Meter will be “determined by the heat supplier or the person legally designated for installing the meter, so that the meter is appropriate for the accurate measurement of consumption that is foreseen or foreseeable” (MID Annex MI-004 §8).

That means the buyer must use a correct specification. This specification must also include dimensions and other properties to ensure that the meter fits the intended installation. Such a specification must also be used when dimensioning the sites where the meter shall be installed so that standardised meter components will fit.



Testing procedures according to MID

Proce- Type testing Individual testingdures

B + F by a notified body. by a notified body




Proce- Type testing Individual testingdures B + F by a notified body. by a notified body

B + D by a notified body by the manufacturer under supervision of a notified body + quality system for production, final product inspection and testing.




Proce- Type testing Individual testingdures B + F by a notified body. by a notified body

B + D by a notified body by the manufacturer under supervision of a notified body + quality system for production, final product inspection and testing.

H1 by the manufacturer by the manufacturer under supervision of a notified body + quality system for design, manufacture, final product inspection and testing




Will be harmonised to MIDWill be listed in the EU Official Journal and contain an Annex Z





Also LVD, PED and part of the EMC directive applies for heat metersbut not completely covered by EN 1434:

No electrical or pressure safety requirements in EN 1434





Also LVD, PED and part of the EMC directive applies for heat metersbut not completely covered by EN 1434:

No electrical or pressure safety requirements in EN 1434

EN 1434 covers not only the metrolocigal requirements of MID but also- suitable for its intended use - not require unreasonable demands of the user - suitable for the conditions in which it is intended to be used



European standard for Heat Meters EN 1434 consists of 6 parts

1) General requirementsDefinitionsMeasuring range and maximum admissible errors, MPEEnvironmental classificationHeat meter specification

2) Constructional requirementStandardised dimensionsInterfaces between sub-unitsMarkings and security seals

3) Data exchange and interfaces4) Pattern approval tests5) Initial verification tests (can also be used for reverification)6) Heat meter installation, commissioning, operational monitoring and maintenance

A normative part with some “musts” to ensure that the conformity with MID is not destroyed

An informative part with some advises



Time schedule and transitional provisionsAlready today several European counties have national regulations for Heat Meters based on the current version of EN 1434. From 2006 the national regulations must be based on the MID, or an harmonised standard (document) approved by the EU Commission and listed in the EU Official Journal

The timetable as it looks now is:2004 03 31 MID is adopted2006 04 30 National regulation implementing MID shall be ready2006 10 30 The new national regulations shall apply2016 10 30 Meters with old not time limited type approvals can not longer be installed

1997 EN 1434 published2001 EN 1434 A1 published2004 12 00 prEN 1434 New edition out for enquiry2005 05 09 End of enquiry period2005 09 15 TC-meeting to discuss the result of the enquiry2006 New edition published



National regulations for reverification of meters

MID is only covering the initial work of selecting a proper meter and take it into use for the first time.





There is no common requirements and practice within Europe regarding meters that already is taken into use.






The EN 1434 part 5 is however a useful procedure also for the purpose of the reverification.






The EN 1434 part 5 is however a useful procedure also for the purpose of the reverification.

The service life before a meter must be reverified differs between the counties. In the information I have seen the interval is between 2 to 10 years.

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