JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters
資料２

Legal metrology system in Germany
General aspects - special aspects of utility meters••••

Introduction
legal basis
responsibilities
future aspects

Dr.- Ing. Rainer Kramer
Physikalisch-Technische Bundesanstalt
Bundesallee 10038116 Braunschweig
Germany1JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters
Introduction•System of legal metrology has a long tradition in Germany
more then 100 years• a lot of different meters are verified or under legal control
balances
utility meters, like gas and electricity meters ,fuel dispensers
measuring container for beer / wine (for instance glasses inrestaurants)• Germany is a federal state
15 states• Responsibilities are divided
verification is task of federal statesfederal government is responsible for unity of legal metrology• European Measurement Instrument Directive (MID) have to be
implemented in Verification act until April of 2006

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JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters
General Information about PTB• PTB is the federal institute for metrology in Germany belonging to the Federal
Ministry for Economics and Labour• PTB has two branches (Braunschweig and Berlin), around 1500 staff• annual budget of 130 million Euro (mainly taxis)• PTB is responsible for units, traceability of measurements (DKD), approvals in
the field of legal metrology, national unity in the field of legal metrology,
improvement of international unity in metrology(and many other services)• 9 technical division and around 400 working groups• often a working group deals with one measurement unit
working group for gas meters
tasks:- the realisation of the unit volume and mass of flowing gas (air and natural gas
under high pressure)- national and European approval of gas meters and conversion devices- participation in national and international organisation work
- research in the field of gas measurement
Staff : 2 scientist, 3 engineers, 2 workers
3JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters

Basis of PTB work in legal metrology• Unit act• Verification act• Verification Ordinance (EO)
• EMC act (electromagnetic environment compatibility)• different acts concerning governmental activities and costs

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JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters

Verification act(main content in respect to utility meters)• aim of the act- protection of consumers- safeguarding of a fair trade- safeguarding of correct measurements in health protection,environment protection etc.
- improvement of trust in official measurements(for instance traffic measurements)• verification duty (which meters have to be verified)• permission to issue ordinances in respect of verification• responsibilities (state governments , duties of PTB)
• costs ordinances• information duties• penalties

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JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters

Verification Ordinancedivided in general part and appendices
general part (main content in respect to utility meters) :• duties during- placing on the market- using- having meters ready for use••••

exception from verification
values used in legal metrology
reverification period
approval (general requirements, kinds of approvals, procedures,tasks of PTB)• verification (procedures, seals, MPE, reverification, investigationsof MPE in service)• general requirements on meters for approval and verification• state approved test laboratories (acceptance, management, duties)

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JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters
appendices

Appendices of verification ordinance include basic requirements fordifferent kinds meter•••

Maximum permissible errors
inscriptions
sealing••

Appendix 5 (EO 5) meters for flowing liquids other than water
Appendix 7 (EO 7) gas meters

EO 7-1 gas meters
EO 7-2 Orifice meters
EO 7-3 auxiliary equipment
EO 7-4 conversion devices
EO 7-5 gas-pressure regulators
EO 7-6 gas quality measurement (caloric value)EO 7-7 meter for CO2- fraction in burn gases
7JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters

General Assembly of all Parties involved in verification
participants:•PTB working groups,•authorities responsible in the federal states,•representatives of state approved test laboratories
Tasks:•safeguarding of unity in legal metrology•discussion of important issues in respect of verification•foundation of working groups for different tasks (like WG gas meters)•responsible for the approval of provision of lower order,•approval of the “state of art in respect to the verification act”

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JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters

Provisions of lower order
PTB-requirements• description of technical solutions which are acceptable for approved
meters• for instance requirements for electronic interfaces and software
aspectsEuropean directives (until MID)
• only for the most important meter types, basis for European approvals
PTB test instructions• guarantee an uniform verification praxis in all states• include description of test facilities and test procedures for verification
Technical instructions• regulation of application issues like installation of turbine gas meters

9JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters

Approval for verification (until MID)
• different kinds:
national approval, European approval, general approval• approved meter type has to fulfil general requirements andthe „state of the art in respect to the verification ordinance”• national approvals only by PTBVerification• conducted by local verification offices (balances, fueldispensers)• utility meters by state approved test laboratories under
supervision of the verification authorities of the states• verification authorities work currently cost neutral (expensesare equal to income)10

JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters

Parts of verified meters•metering sensor•display•computer and/or auxiliary equipment- auxiliary equipment is treated as verified meters

results of verified meters must be clearly distinctive from resultsof not verified meters or functions

11JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters

Procedure of Verification:•inspection concerning the correct construction of a meter(Is the instrument identical to the approved type?)•metrological test
(MPE’s have to be fulfilled, adjustment may happen during
verification procedure)•Sealing
Verification may be carried out in different steps(example: test of a conversion device is carried out in a state
approved test laboratory of a manufacturer, sealing happens
after the installation)requirements on test facilities are approved by general assemblyof all involved parties in verification
verification fee is fixed in cost ordinanceverification for gas meter costs 2 Euro and is economic
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JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters
Accredited testing laboratories„state approved test laboratories“• most of the utility instruments are verified by "accredited testing laboratories".
• support the State in the implementation of the Verification Act• Holders: public utilities supplying water and energy, and manufacturers• Sections 47 to 63 of the Verification Ordinance specify the conditions
for recognition as a testing laboratory(staff, suitable rooms, test equipment traceable to PTB)
• holder of the testing laboratory must establish and maintain the testinglaboratory as an organisationally independent unit so that proper
operation is guaranteed.
• testing laboratories are recognised by the competent supervising verification
authorities and are subject to their supervision and control.
• members of the managerial staff are officially appointed and must moreoverbind themselves to perform their tasks conscientiously and impartially.
• testing laboratories are responsible for the certification of about 80 million
instruments installed in public supply networks to measure electricity, gas,
water and heat.
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JapanOctober 2005

Legal metrology system in Germany
General aspects - special aspects of utility meters
Future Aspects

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new verification act and ordinance will implement MID
general requirements and conformity assessment modules will beidentical for all meters under legal control (as in MID)
besides MID national regulated measurements will exist
PTB will be notified body for Modules B, D and H1
MID conformity assessment are much more complex than current
approvals (additional tests)
Policy of PTB
notified bodies besides PTB may be established by privateorganisations for all meters types
PTB will not compete with other NB
PTB will maintain core competence and care about organisation
work in legal metrology issues
PTB as well as verification authorities are faced to staff cuts---> this will lead to a shift of tasks to private organisations
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