2006 issue 1
Contents
1. a gt N k 5 2 1 is common to 1 1 to 1 4 below For the measurand The measuring range in terms of its maximum and minimum capacity 2 6 T 3 7 T 3 8 Minimum only in 2 6 For the electrical supply influence quantities In case of AC voltage supply the nominal AC voltage supply or the AC voltage limits In case of DC voltage supply the nominal and minimum DC voltage supply or the DC voltage limits 2 8 2 2 8 3 For the mechanical and climatic influence quantities The minimum temperature range is 30 C unless specified otherwise in the following chapters of this Annex The mechanical environment classes according to Annex paragraph 1 3 2 are not applicable For instruments which are used under special mechanical strain e g instruments incorporated into vehicles the manufacturer shall define the mechanical conditions of use 2 8 1 For other influence quantities if applicable The rate s of operation The characteristics of the product s to be weighed 2 Permissible effect of disturbances Electromagnetic environment The required performance and the critical change value are given in the relevant Chapter of this Annex for each type of instrument Comment 3 Suitability Means shall be provided to limit the effects of tilt loading and rate of operation such that maximum permissible errors MPEs are not exceeded in normal operation T 2 1 32. outside the controlled range shall not be unduly biased 7 4 Where a measuring instrument is designed for the measurement of values of the measurand that are constant over time the measuring instrument shall be insensitive to small fluctuations of the value of the measurand or shall take appropriate action Not aplicable Not applicable 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 7 6 A measuring instrument shall be designed so as to allow the control of the measuring tasks after the instrument has been placed on the market and put into use If necessary special equipment or software for this control shall be part of the instrument The test procedure shall be described in the operation manual 3 7 A 8 T 1 9 3 12 6 4 amp 6 5 2 No reference to operation manual in R61 1 2004 When a measuring instrument has associated software which T 2 1 4 provides other functions besides the measuring function the 3 2 3 3 2 4 software that is critical for the metrological characteristics shall be identifiable and shall not be inadmissibly influenced by the associated software 8 Protection against corruption 8 1 The metrological characteristics of a measuring instrument shall 3 2 3 3 2 4 amp not be influenced in any inadmissible way by the connection to it 3 3 3 of another device by any
3. 1 a new route is open for the presumption of conformity by using OIML recommendations Art 13 point 2 Member States shall presume conformity with the essential requirements referred to in Annex and in the relevant instrument specific Annexes in respect of a measuring instruments that complies with the corresponding parts of the normative documents and lists referred to in Article 16 1 a the references in respect of which have been published in the Official Journal of the European Union C series Article 4 i defines that normative document means a document containing technical specifications adopted by the Organisation International de M trologie L gale OIML subject to the procedure stipulated in Article 16 1 In Article 16 1 a the functions of the Measuring Instruments Committee are described as follows identify normative documents drawn up by OIML and in a list indicate the parts thereof compliance with which gives rise to a presumption of conformity with the corresponding essential requirements of this Directive In the WELMEC Committee Meeting in May 2005 WELMEC agreed to support the work of the Commission on this issue and the MI xxx Annexes of the MID has been given to the Working Groups of WELMEC to develop corresponding tables including comments as a basis for the publication foreseen in the Directive A timetable has been established and rules for drawing up these tables have been given by
4. feature of the connected device itself 4 2 5 or by any remote device that communicates with the measuring instrument 8 2 A hardware component that is critical for metrological 3 2 3 characteristics shall be designed so that it can be secured 3 2 4 Security measures foreseen shall provide for evidence of an intervention 8 3 Software that is critical for metrological characteristics shall be 3 2 4 8 WELMEC WG 2 Guide 8 16 2 Issue 1 identified as such and shall be secured Software identification shall be easily provided by the measuring instrument Evidence of an intervention shall be available for a reasonable period of time 8 4 Measurement data software that is critical for measurement 3 2 2 3 2 3 amp characteristics and metrologically important parameters stored or 3 2 4 transmitted shall be adequately protected against accidental or intentional corruption 8 5 For utility measuring instruments the display of the total quantity Not applicable supplied or the displays from which the total quantity supplied can be derived whole or partial reference to which is the basis for payment shall not be able to be reset during use 9 Information to be borne by and to accompany the instrument 9 1 A measuring instrument shall bear the following inscriptions 3 10 manufacturer s mark or name information in respect of its accuracy plus when applicable information in respect of the conditi
5. supplier of electricity gas heat or water 1 Allowable Errors 1 1 Under rated operating conditions and in the absence of a 2 2 2 3 2 4 amp 4 WELMEC WG 2 Guide 8 16 2 Issue 1 disturbance the error of measurement shall not exceed the maximum permissible error MPE value as laid down in the appropriate instrument specific requirements Unless stated otherwise in the instrument specific annexes MPE is expressed as a bilateral value of the deviation from the true measurement value 2 5 4 1 1 1 2 Under rated operating conditions and in the presence of a disturbance the performance requirement shall be as laid down in the appropriate instrument specific requirements Where the instrument is intended to be used in a specified permanent continuous electromagnetic field the permitted performance during the radiated electromagnetic field amplitude modulated test shall be within MPE 4 1 2 No reference to permanent continuous electromagnetic field 1 3 The manufacturer shall specify the climatic mechanical and electromagnetic environments in which the instrument is intended to be used power supply and other influence quantities likely to affect its accuracy taking account of the requirements laid down in the appropriate instrument specific annexes 5 2 1 1 3 1 Climatic environments The manufacturer shall specify the upper temperature limit and the lower temperature limit fro
6. the value of the difference of their mass and a nominal set point Weight labeller An automatic catchweigher that labels individual articles with the weight value Weight price labeller An automatic catchweigher that labels individual articles with the weight value and price information 11 WELMEC WG 2 Guide 8 16 2 Issue 1 Automatic gravimetric filling instrument An automatic weighing instrument that fills containers with a predetermined and virtually constant mass of product from bulk T 1 8 Slightly different wording Discontinuous totaliser totalising hopper weigher An automatic weighing instrument that determines the mass of a bulk product by dividing it into discrete loads The mass of each discrete load is determined in sequence and summed Each discrete load is then delivered to bulk Continuous totaliser An automatic weighing instrument that continuously determines the mass of a bulk product on a conveyor belt without systematic subdivision of the product and without interrupting the movement of the conveyor belt Rail weighbridge An automatic weighing instrument having a load receptor inclusive of rails for conveying railway vehicles SPECIFIC REQUIREMENTS Chapter I Requirements common to all types of automatic weighing instruments 1 Rated Operating Conditions The manufacturer shall specify the rated operating conditions for the instrument as follows
7. T 2 1 4 2 8 4 3 4 3 5 3 6 amp 3 7 3 2 Adequate material handling facilities shall be provided to enable the instrument to respect the MPEs during normal operation 3 4 3 5 3 6 amp 3 7 12 WELMEC WG 2 Guide 8 16 2 Issue 1 3 3 Any operator control interface shall be clear and effective 3 3 1 3 4 3 5 amp 3 6 3 4 The integrity of the display where present shall be verifiable by 4 2 2 the operator 3 5 Adequate zero setting capability shall be provided to enable the T 2 4 3 8 instrument to respect the MPEs during normal operation T 2 5 3 8 5 3 8 6 3 6 Any result outside the measurement range shall be identified as 3 3 3 such where a printout is possible 3 8 5 2 4 Conformity assessment 3 The conformity assessment procedures referred to in Article 9 that the manufacturer can choose between are For mechanical systems B D or B E or B F or D1 or F1 or Gor H1 For electromechanical instruments B D or B E or B F or Gor H1 For electronic systems or systems containing software B D or B F or Gor H1 Chapter Ill Automatic Gravimetric Filling Instruments 1 Accuracy Classes 1 1 The manufacturer shall specify both the reference accuracy class 5 2 1 2 1 2 2 2 Ref x and the operational accuracy class es X x 1 2 An instrument type is designated a reference accuracy class 2 1 R61 has no Ref x corresponding to the best possible
8. WELMEC 8 16 2 Issue 1 WELMEC European cooperation in legal metrology Measuring Instruments Directive 2004 22 EC Automatic Gravimetric Filling Instruments Corresponding Tables OIML R 61 1 2004 MID 006 III November 2006 WELMEC European cooperation in legal metrology WELMEC is a cooperation between the legal metrology services of the Member States of the European Union and EFTA 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 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 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 Published by WELMEC Secretariat Federal Office of Metrology and Surveying BEV Arltgasse 35 A 1160 Vienna Austria Tel 43 676 8210 3608 Fax 43 1 49 20 875 8006 Email welmec bev gv at Website www welmec org WELMEC WG 2 Guide 8 16 2 Issue 1 FOREWORD The Measuring Instruments Directive MID 2004 22 EC entered into force on the 30 October 2006 In this new approach directive the presumption of conformity is mentioned in Article 13 In addition to the use of harmonised standards Art 13 point
9. accuracy for 2 2 1 upper limit on instruments of the type After installation individual instruments 2 2 2 x value are designated for one or more operational accuracy classes 5 3 4 but gives the X x having taken account of the specific products to be weighed possibility for The class designation factor x shall be lt 2 and in the form 1 x national 10 2X 10 or 5 x 10 where k is a negative whole number or restriction zero MID contains the restriction for EU 1 3 The reference accuracy class Ref x is applicable for static loads 2 2 1 1 4 For the operational accuracy class X x X is a regime relating 2 2 2 accuracy to load weight and x is a multiplier for the limits of error specified for class X 1 in 2 2 2 MPEs 2 1 Static weighing error Heading 2 1 1 For static loads under rated operating conditions the MPE for 2 5 Although reference accuracy class Ref x shall be 0 312 of the maximum specified permissible deviation of each fill from the average as specified differently in Table 5 multiplied by the class designation factor x Due to factor 0 312 the values given in the directive are slightly smaller than those of R61 2 1 2 For instruments where the fill may be made up from more than 2 5 A 6 1 3 2 one load e g cumulative or selective combination weighers the T 3 10 MPE for static loads shall be the accuracy required for the fill as specified in 2 2 i e not the sum of the maximum permissi
10. ble deviation for the individual loads 13 WELMEC WG 2 Guide 8 16 2 Issue 1 2 2 Deviation from average fill Table 5 Value of the mass m g of the Maximum permissible deviation of each fill from the average for class X 1 fills m lt 50 7 2 50 lt m lt 100 3 6g 100 lt m lt 200 3 6 200 lt m lt 300 7 29 300 lt m lt 500 2 4 500 lt m lt 1 000 1 000 lt m lt 10 000 12g 1 2 10 000 lt m lt 15 000 120 g 15 000 lt m 0 8 Note The calculated deviation of each fill from the average may be adjusted to take account for the effect of material particle size 4 2 2 2 Table1 5 3 2 2 3 T 3 2 2 3 Error relative to pre set value setting error For instruments where it is possible to pre set a fill weight the maximum difference between the pre set value and the average mass of the fills shall not exceed 0 312 of the maximum permissible deviation of each fill from the average as specified in Table 5 2 4 T 3 3 Specified differently same problem as for 2 1 1 Performance Under Influence Factor And Electromagnetic Disturbance 3 1 The MPE due to influence factors shall be as specified in paragraph 2 1 2 5 T 3 4 3 2 The critical change value due to a disturbance is a change of the static weight indication equal to the MPE as specified in paragraph 2 1 calculat
11. cal measuring instruments used in the same location or used for utility measurements do not necessarily require individual instruction manuals Not mentioned in R 61 1 2004 9 5 Unless specified otherwise in an instrument specific annex the scale interval for a measured value shall be in the form 1x10 2x10 or 5x10 where n is any integer or zero The unit of measurement or its symbol shall be shown close to the numerical value 3 3 2 R61 does not define form of the scale interval although Table in 2 7 implies a limitation A material measure shall be marked with a nominal value or a scale accompanied by the unit of measurement used Not applicable 9 7 The units of measurement used and their symbols shall be in accordance with the provisions of Community legislation on units of measurement and their symbols 2 9 9 8 All marks and inscriptions required under any requirement shall be clear non erasable unambiguous and non transferable 3 10 4 3 11 10 Indication of result 10 1 Indication of the result shall be by means of a display or hard copy T 2 3 3 3 The indication of any result shall be clear and unambiguous and accompanied by such marks and inscriptions necessary to inform the user of the significance of the result Easy reading of the presented result shall be permitted under normal conditions of use Additional indications may be shown provided they can
12. ed for the rated minimum fill or a change that would give equivalent effect on the fill in the case of instruments where the fill consists of multiple loads The calculated critical change value shall be rounded to the next higher scale interval d 4 1 2 4 2 3 T 3 1 A 6 1 3 1 3 3 The manufacturer shall specify the value of the rated minimum fill 5 2 1 T 3 9 2 7 T 3 12 14
13. l lines AD ARE PPY gt A 6 3 3 Electrostatic discharges A634 1 Radio frequency electromagnetic fields A6 3 4 2 Conducted radio frequency electromagnetic fields on supply lines and or signal lines Surges not Surges on supply lines and or signal lines included in R61 1 3 4 Other influence quantities to be considered where appropriate are Voltage variation 2 8 2 amp A 6 2 4 2 8 3 4 2 6 amp A 6 4 Mains frequency variation Power frequency magnetic fields Any other quantity likely to influence in a significant way the 4 2 4 A 5 2 amp Warm up accuracy of the instrument T 3 13 2 8 4 A 6 2 5 Tilt 2 8 1 3 A6 2 2 Zero drift with temperature 1 4 When carrying out the tests as envisaged in this Directive the Comment following paragraphs apply WELMEC WG 2 Guide 8 16 2 Issue 1 1 4 1 Basic rules for testing and the determination of errors Essential requirements specified in 1 1 and 1 2 shall be verified for each relevant influence quantity Unless otherwise specified in the appropriate instrument specific annex these essential requirements apply when each influence quantity is applied and its effect evaluated separately all other influence quantities being kept relatively constant at their reference value Metrological tests shall be carried out during or after the application of the influence quantity whichever condition corresponds to the normal operational statu
14. l shock M2 M3 b No classes used in R 61 1 2004 1 3 3 Electromagnetic environments are classified into classes E1 E2 or E3 as described below unless otherwise laid down in the appropriate instrument specific annexes E1 This class applies to instruments used in locations with electromagnetic disturbances corresponding to those likely to be found in residential commercial and light industrial buildings A 6 3 Severity levels are referenced in each test No classes used in R61 1 2004 WELMEC WG 2 E2 This class applies to instruments used in locations with electromagnetic disturbances corresponding to those likely to be found in other industrial buildings E3 This class applies to instruments supplied by the battery of a vehicle Such instruments shall comply with the requirements of E 2 and the following additional requirements voltage reductions caused by energising the starter motor circuits of internal combustion engines load dump transients occurring in the event of a discharged battery being disconnected while the engine is running Guide 8 16 2 Issue 1 No equivalent to E3 b The following influence quantities shall be considered in See also A 6 4 relation with electromagnetic environments 4 1 2 amp 4 2 3 Voltage interruptions A 6 3 1 Short voltage reductions A 6 3 1 Voltage transients on supply lines and or signa
15. m any of the values in Table 1 unless otherwise specified in the annexes MI 001 to MI 010 and indicate whether the instrument is designed for condensing or non condensing humidity as well as the intended location for the instrument i e open or closed Table 1 Temperature Limits Upper temperature limit 30 C 40 C 55 C 70 C Lower temperature limit 5 C 10 C 25 C 40 C 2 8 1 No reference to condensing humidity or intended location 10 to 40 C Min of 30 C 1 3 2 Mechanical environments are classified into classes M1 to M3 as described below a M1 This class applies to instruments used in locations with vibration and shocks of low significance e g for instruments fastened to light supporting structures subject to negligible vibrations and shocks transmitted form local blasting or pile driving activities slamming doors etc This class applies to instruments used in locations with significant or high levels of vibration and shock e g transmitted from machines and passing vehicles in the vicinity or adjacent to heavy machines conveyor belts etc This class applies to instruments used in locations where the level of vibration and shock is high and very high e g for instruments mounted directly on machines conveyor belts etc The following influence quantities shall be considered in relation with mechanical environments Vibration Mechanica
16. nce between the by the criteria measurement results shall be small when compared with the applied MPE Implication by number of fills in 6 3 4 Discrimination and Sensitivity Covered by testing ona fully operational instrument and by the criteria applied WELMEC WG 2 Guide 8 16 2 Issue 1 5 Durability A measuring instrument shall be designed to maintain an adequate stability of its metrological characteristics over a period of time estimated by the manufacturer provided that it is properly installed maintained and used according to the manufacturer s instruction when in the environmental conditions for which it is intended 4 1 3 4 3 3 amp A7 6 Reliability A measuring instrument shall be designed to reduce as far as possible the effect of a defect that would lead to an inaccurate measurement result unless the presence of such a defect is obvious 3 2 2 3 2 3 3 4 3 5 3 6 3 7 3 8 3 9 4 1 2 amp 4 2 7 1 A measuring instrument shall have no feature likely to facilitate fraudulent use whereas possibilities for unintentional misuse shall be minimal 3 2 1 3 2 2 7 Suitability 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 3 1 7 3 The errors of a utility measuring instrument at flows or currents
17. not be confused with the metrologically controlled indications 3 3 1 to 3 3 4 Inthe case of hard copy the print or record shall also be easily legible and non erasable 3 3 3 Non erasable missing in R61 1 2004 10 WELMEC WG 2 Issue 1 10 4 A measuring instrument for direct sales trading transactions shall be designed to present the measurement result to both parties in the transaction when installed as intended When critical in case of direct sales any ticket provided to the consumer by an ancillary device not complying with the appropriate requirements of this Directive shall bear an appropriate restrictive information Not applicable 10 5 Whether or not a measuring instrument intended for utility 2 1 Not measurement purposes can be remotely read it shall in any case applica be fitted with a metrologically controlled display accessible ble without tools to the consumer The reading of this display is the measurement result that serves as the basis for the price to pay 11 Further processing of data to conclude the trading transaction 11 1 A measuring instrument other than a utility measuring instrument Measurement shall record by a durable means the measurement result is non accompanied by information to identify the particular transaction repeatable but when the filled bag the measurement is non repeatable and container is the measuring instrumen
18. on part and Chapter Ill of Annex MI 006 ANNEX 1 ESSENTIAL REQUIREMENTS A measuring instrument shall provide a high level of metrological protection in order that any party affected can have confidence in the result of measurement and shall be designed and manufactured to a high level of quality in respect of the measurement technology and security of the measurement data See details in 2 3 4 Also objective of OIML The requirements that shall be met by measuring instruments are set out below and are supplemented where appropriate by specific instrument requirements in Annexes MI 001 to MI 010 that provide more detail on certain aspects of the general requirements The solutions adopted in the pursuit of the requirements shall take account of the intended use of the instrument and any foreseeable misuse thereof Comment only so see below the details of correspondenc e Also objective of OIML DEFINITIONS VIM reference Measurand document The measurand is the particular quantity subject to measurement shared by Influence quantity VIM 2 7 amp T 5 1 BIPM An influence quantity is a quantity that is not the measurand but that IEC IFCC ISO affects the result of measurement UPAC IUAPP Rated Operating Conditions VIM 5 5 amp T 5 2 OIML The rated operating conditions are the values for the measurand and Slightly influence quantities making up the normal working conditi
19. ons of an different instrument wording Disturbance T 5 1 2 2nd sentence is An influence quantity having a value within the limits specified in the a comment appropriate requirement but outside the specified rated operating Slightly conditions of the measuring instrument An influence quantity is a different disturbance if for that influence quantity the rated operating conditions wording are not specified Critical change value T 4 2 6 amp T 4 2 5 Editorial The critical change value is the value at which the change in the difference that measurement result is considered undesirable CCV is a limit where SF corresponds to all errors beyond the limit Material Measure A material measure is a device intended to reproduce or supply in a permanent manner during its use one or more known values of a given quantity Direct sales A trading transaction is direct sales if the measurement result serves as the basis for the price to pay and atleast one of the parties involved in the transaction related to measurement is a consumer or any other party requiring a similar level of protection and all the parties in the transaction accept the measurement result at that time and place Climatic environments Comment Climatic environments are the conditions in which measuring instruments may be used To cope with climatic differences between the Member States a range of temperature limits has been defined Utility A utility is regarded as a
20. ons of use measuring capacity measuring range identity marking number of the EC type examination certificate or the EC design examination certificate information whether or not additional devices providing metrological results comply with the provisions of this Directive on legal metrological control 9 2 An instrument of dimensions too small or of too sensitive a Not applicable composition to allow it to bear the relevant information shall have its packaging if any and the accompanying documents required by the provisions of this Directive suitably marked WELMEC WG 2 Guide 8 16 2 Issue 1 9 3 The instrument shall be accompanied by information on its operation unless the simplicity of the measuring instrument makes this unnecessary Information shall be easily understandable and shall include where relevant rated operating conditions mechanical and electromagnetic environment classes the upper and lower temperature limit whether condensation is possible or not open or closed location instructions for installation maintenance repairs permissible adjustments instructions for correct operation and any special conditions of use conditions for compatibility with interfaces sub assemblies or measuring instruments 3 10 amp 3 11 Markings on instrument No mention of user manual or information for the user 9 4 Groups of identi
21. s of the instrument when that influence quantity is likely to occur A 6 A 6 1 1 Annex A Conditions listed in each test 1 4 2 Ambient humidity According to the climatic operating environment in which the instrument is intended to be used either the damp heat steady state non condensing or damp heat cyclic condensing test may be appropriate The damp heat cyclic test is appropriate where condensation is important or when penetration of vapour will be accelerated by the effect of breathing In conditions where non condensing humidity is a factor the damp heat steady state is appropriate 4 2 1 A 6 2 3 Non condensing only Reproducibility The application of the same measurand in a different location or by a different user all other conditions being the same shall result in the close agreement of successive measurements The difference between the measurement results shall be small when compared with the MPE 4 3 3 amp A7 Span stability Reproducibility is in general also covered by all other tests A measuring instrument shall be sufficiently sensitive and the discrimination threshold shall be sufficiently low for the intended measurement task 3 Repeatability Covered by testing on a The application of the same measurand under the same fully operational conditions of measurement shall result in the close agreement of instrument and successive measurements The differe
22. t is normally intended for use in the available and absence of one of the trading parties could be checked 11 2 Additionally a durable proof of the measurement result and the The bag information to identify the transaction shall be available on container is request at the time the measurement is concluded marked 12 Conformity evaluation A measuring instrument shall be designed so as to allow ready 3 7 evaluation of its conformity with the appropriate requirements of this Directive ANNEX MI 006 AUTOMATIC WEIGHING INSTRUMENTS The relevant essential requirements of Annex I the specific T 1 6 Slightly requirements of this Annex and the conformity assessment different procedures listed in Chapter of this Annex apply to automatic wording weighing instruments defined below intended to determine the mass of a body by using the action of gravity on that body DEFINITIONS Automatic weighing instrument T 1 7 Slightly An instrument that determines the mass of a product without the different intervention of an operator and follows a predetermined programme of wording automatic processes characteristic of the instrument Automatic catchweigher An automatic weighing instrument that determines the mass of pre assembled discrete loads for example prepackages or single loads of loose material Automatic checkweigher An automatic catchweigher that subdivides articles of different mass into two or more subgroups according to
23. the WELMEC Committee To prepare a proposal at least 3 experts has been involved The drafts have been discussed in the responsible Working Group including industry The results have been sent do the WELMEC Secretariat and the WELMEC Committee Members has been asked for Comments These drafts have been discussed during the WELMEC Committee Meeting in May 2006 and have been adopted as WELMEC guides The documents have been sent to the European Commission for further consideration and for drafting the publication required in the directive This has been done in a small Working Group with the European Commission June July 2006 The European Commission presented the simplified tables to the Commission Working Group on Measuring Instruments for further comment and subsequently obtained a positive advice from the Measuring Instruments Committee on 25 September 2006 The simplified tables are published In the Official Journal of the European Union series C n 269 p of 4 November 2006 As guidance WELMEC is publishing the full tables with all the comments and detailed information underlying the simplified tables to aid all interested and concerned parties The European Commission webpage gives the link to the documents of WELMEC WELMEC WG 2 Guide 8 16 2 Issue 1 Automatic Gravimetric Filling Instruments R61 1 2004 REQUIREMENTS and correspondence Directive 2004 22 EC Essential requirements of Annex 1 and OIML R61 1 2004 Comments comm
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