Bsi bs en 12261 2002 (2006)

30106519 pdf This European Standard EN 12261 2002, with the incorporation of Amendment A1 2006 has the status of a British Standard Incorporating Corrigendum No 1, Amendment No 1 BS EN 12261 2002 This[.]

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This European Standard EN 12261:2002, with the incorporation of

Amendment A1:2006 has the status of a British Standard

,&6

Incorporating Corrigendum No 1, Amendment No 1

BS EN 12261:2002

This British Standard, having

been prepared under the

direction of the Engineering

Sector Policy and Strategy

Committee, was published

under the authority of the

Standards Policy and Strategy

Committee on 22 May 2002

National foreword

This British Standard is the official English language version of

EN 12261:2002, including Corrigendum September 2003 and AmendmentA1:2006 It together with BS EN 12480:2002, supersedes BS 4161-6:1987 which is withdrawn

The start and finish of text introduced or altered by amendment isindicated in the text by tags!" Tags indicating changes to CEN text carry the number of the CEN amendment For example, text altered by CEN

Catalogue

A British Standard does not purport to include all the necessary provisions of

a contract Users of British Standards are responsible for their correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

— aid enquirers to understand the text;

— present to the responsible European committee any enquiries on theinterpretation, or proposals for change, and keep the UK interests informed;

— monitor related international and European developments andpromulgate them in the UK

EN 12261

+A1

May 2006April 2002

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2 Normative references ị

ị /iầ“ấ] `ivˆ˜ˆỉˆœ˜ấÊ>˜`ÊấẺ“Lœấổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổx ịổẳ /iầ“ấÊ>˜` `ivˆ˜ˆỉˆœ˜ấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổx ịổố -Ẻ“Lœấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổn { iỉiầÊV>ấấˆvˆV>ỉˆœ˜ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổ™ {ổẳ >˜}i ỡầiấấỏầiÊầ>ỉˆ˜}ấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổ™ {ổố >ấʓiỉiầÊấˆâiấ] ầ>˜}i>LˆˆỉẺ >˜` Vœ˜˜iVỉˆœ˜ `ˆ>“iỉiầÊấˆâiấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổ™ {ổị

{ổ{ /i“ỡiầ>ỉỏầiÊầ>˜}iấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổẳẳ

x iỉầœœ}ˆV> ỡiầvœầ“>˜ViÊầiÌỏˆầi“i˜ỉấổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổẳẳ xổẳ i˜iầ>ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổẳẳ xổố /ẺỡiÊỉiấỉˆ˜}ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổẳẳ

ẻ iấˆ}˜ >˜` “>ỉiầˆ>ÊầiÌỏˆầi“i˜ỉấổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổẳđ ẻổẳ i˜iầ>ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổẳđ ẻổố ,œLỏấỉ˜iấấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổẳđ ẻổị ,iấˆấỉ>˜ViÊỉœ i˜ũˆầœ˜“i˜ỉ> Vœ˜`ˆỉˆœ˜ấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổốố ẻổ{ ,i“œũ>Li “iỉiầʓiV…>˜ˆấ“ấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổố{ ẻổx ˜`ˆV>ỉˆ˜} `iũˆViấÊ>˜` >VViấấœầˆiấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổốx ẻổẻ *ầiấấỏầi >˜`Êỉi“ỡiầ>ỉỏầiÊỉ>ỡỡˆ˜}ấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổốẻ ẻổđ ỏLầˆV>ỉˆœ˜ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổốđ

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n >ầŽˆ˜} ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổịẳ nổẳ i˜iầ>ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổịẳ nổố >ỉ> ỡ>ỉiổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổịẳ nổị ˆầiVỉˆœ˜ œv vœưổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổịố nổ{ 7œầŽˆ˜} ỡœấˆỉˆœ˜ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổịố nổx "ỉ…iầÊVœ˜˜iVỉˆœ˜ấ ổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổổịố

Annex A (normative) Test facility specifications 34

Annex B (normative) Perturbation testing 35

Annex C (informative) Recommendations for use 41

Annex D (normative) Individual factory testing 42

Annex E (normative Metrological requirements and tests for each meter prior to dispatch (Individual meter testing) 43

9 Documentation 33

9.1 General 33

9.2 Declaration of conformity 33

9.3 Instruction manual 33

Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2004/22 Measuring Instruments Directive 47

Bibliography 52

or, if specified by the manufacturer,

• open locations (outdoor without any covering) with condensing humidity or with non-condensinghumidity

and in locations with electromagnetic disturbances

!This European Standard specifies the measuring conditions, requirements and tests for the construction,performance and safety of class 1,0 axial and radial turbine gas meters with mechanical indicating devices, hereinafter referred to as a meter(s), having in-line pipe connections for gas flow measurement

This document has been prepared under a mandate given to CEN by the European Commission and theEuropean Free Trade Association, and supports essential requirements of EU Directive 2004/22, MeasuringInstruments Directive (MID)

For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,Switzerland and United Kingdom

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Unless otherwise specified in this standard:

• all pressures used are gauge;

• all influence quantities, except the one under test, are kept relatively constant at their reference value."

ÓÍ œĂ“>̈ÛiÍĂiviĂi˜ViÊ

/…iÊi ˜œĂ“>̈ÛiÍĂiviĂi˜ViÊ >Ăi VˆÌi` >ÌÍ̅i >««Ăœ«Ăˆ>Ìi «>ViÊ ˆ˜Í̅iÍÌiÝÌ >˜`Í̅i «ÕLˆV>̈œ˜ÊÍ>Ăi ˆÊÌi`…iĂi>vÌiĂ° œĂÍ `>Ìi`Í ĂiviĂi˜ViÊÍ ÊÕLÊiµÕi˜ÌÍ >“i˜`“i˜ÌÊÍ Ìœ œĂ Ăiۈʈœ˜Ê œv >˜Þ œv ̅iÊi «ÕLˆV>̈œ˜ÊĂiviĂi˜ViÊÍ̅i >ÌiÊÌ i`ˆÌˆœ˜ œvÍ̅i «ÕLˆV>̈œ˜ÍĂiviĂĂi` ̜ >««ˆiÊÍ­ˆ˜VÕ`ˆ˜} >“i˜`“i˜ÌÊ®°

/iÊÌ }>ÊiÊÍp /iÊÌ «ĂiÊÊÕĂiÊÍp
««ˆ>˜Vi V>Ìi}œĂˆiÊ

!It is designed to measure, memorize and display the volume of a fuel gas that has passed through it"

ΰ£°Ó

“i>ÃÕÀi` µÕ>˜ÌˆÌÞ

volume in cubic metres, at metering conditions

3.1.3

volume flow rate

volume at metering conditions divided by time

!operating temperature range"

range of metering temperatures over which the meter operates within the metrological requirements

3.1.7.5

“>݈“Õ“ `iÈ}˜ «ÀiÃÃÕÀi ­ « “>Ý ®

pressure on which design calculations are based

ΰ£°n `iÈ}˜>̈œ˜

ΰ£°n°£

‡`iÈ}˜>̈œ˜

˜Õ“iÀˆV> `iÈ}˜>̈œ˜ œvÊ Ãˆâi vœÀÊ Vœ“«œ˜i˜ÌÃÊ œv > «ˆ«iܜÀŽÊ ÃÞÃÌi“]Ê Ü…ˆV… ˆÃ ÕÃi` vœÀ ÀiviÀi˜Vi

«ÕÀ«œÃið ÌÊ Vœ“«ÀˆÃiÃÊ Ì…i iÌÌiÀà vœœÜi` LÞ > `ˆ“i˜Ãˆœ˜iÃà ܅œi ˜Õ“LiÀÊ Ü…ˆV… ˆÃ ˆ˜`ˆÀiV̏ÞÀi>Ìi`Ê̜Ê̅i «…ÞÈV>ÊÈâi] ˆ˜ “ˆˆ“iÌÀiÃ] œvÊ̅i LœÀi œÀʜÕÌÈ`i `ˆ>“iÌiÀʜvÊ̅i i˜` Vœ˜˜iV̈œ˜Ã

ΰ£°n°Ó

* ‡`iÈ}˜>̈œ˜

>«…>˜Õ“iÀˆVÊÌiÀ“ÊÕÃi` vœÀÊÀiviÀi˜Vi «ÕÀ«œÃiÃÊÀi>Ìi`Ê̜ > Vœ“Lˆ˜>̈œ˜ œv “iV…>˜ˆV> >˜` `ˆ“i˜Ãˆœ˜>

V…>À>VÌiÀˆÃ̈VÃʜv > Vœ“«œ˜i˜Ìʜv > «ˆ«iܜÀŽÊÃÞÃÌi“Ê܈̅ÊÀi}>À` ̜ «ÀiÃÃÕÀi° ÌÊVœ“«ÀˆÃià ̅i iÌÌiÀà * vœœÜi` LÞÊ> `ˆ“i˜Ãˆœ˜iÃà ܅œi ˜Õ“LiÀ

ΰ£°™

“iÌiÀˆ˜} Vœ˜`ˆÌˆœ˜Ã

Vœ˜`ˆÌˆœ˜Ã œv ̅i }>à «ÀiÛ>ˆˆ˜} >ÌÊ̅i «œˆ˜Ìʜv ̅i “i>ÃÕÀi“i˜ÌÊ­i°}°\Ê Ìi“«iÀ>ÌÕÀi >˜` «ÀiÃÃÕÀi œvÊ̅i

“i>ÃÕÀi` }>Ãʈ˜Ê̅i “iÌiÀ®

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,iޘœ`ÃʘՓLiÀÊ­ ,i ®

˜Õ“LiÀÊÀiviÀÀˆ˜}Ê̜ ̅i vœÜÊVœ˜`ˆÌˆœ˜Ã\

Û

+r

,

yy

ˆ˜`ˆV>̈œ˜ œv >ÊÌÕÀLˆ˜i “iÌiÀʓˆ˜ÕÃÊ̅iÊÀiviÀi˜ViÊÛ>Õi œvÊ̅i “i>ÃÕÀ>˜`

® >Ài iÝ«ÀiÃÃi` >ÃÊÀi>̈ÛiÊÛ>ÕiÃÊ­>ÃÊ> «iÀVi˜Ì>}i® LÞÊ̅iÊÀ>̈œ œvÊ̅i `ˆvviÀi˜Vi LiÌÜii˜Ê̅i

ˆ˜`ˆV>Ìi`ÊۜÕ“i ­6ˆ® >˜` >ÊÀiviÀi˜ViÊۜÕ“i ­6V® œvÊ̅i }>à ܅ˆV… …>ÃÊ«>ÃÃi`Ê̅ÀœÕ}…Ê̅i }>ÃʓiÌiÀÊ̜

3.1.19 Q r

overload flowrate, the highest flowrate at which the meter operates for a short period of time withoutdeteriorating"

ΰÓÊ -ޓLœÃ

/>Li £ p -ޓLœÃ

{ iÌiÀÊV>ÃÈvˆV>̈œ˜

{°£ >˜}i «ÀiÃÃÕÀiÊÀ>̈˜}Ã

>˜}iÃÊÅ> Li `iÈ}˜i` >VVœÀ`ˆ˜}Ê̜ * iÈ}˜>̈œ˜ œÀ
- V>ÃÃÊÀ>̈˜} ­Ãii />LiÊÓ®°

/>LiÊÓÊp >˜}i «ÀiÃÃÕÀi À>̈˜}Ã

/…iÊÕÃi œvÊ̅i vœœÜˆ˜} «ÀiÃÃÕÀiÊÀ>̈˜}à ˆÃÊÀiVœ““i˜`i`\

£äʇ £ÈʇÊÓä ‡ Óx ‡ {äʇ xäʇ £ää ‡ £xäʇÊÓxäʇ {Óä°

{°ÓÊ >ÃʓiÌiÀÊÈâiÃ]ÊÀ>˜}i>LˆˆÌÞ >˜` Vœ˜˜iV̈œ˜ `ˆ>“iÌiÀÊÈâiÃ

!Gas meters s hall be classified as class 1,0 with the maximum and minimum flow rates and nominaldiameters as shown in table 3."

/…i “>݈“Õ“ >˜` “ˆ˜ˆ“Õ“ vœÜÊ À>ÌiÃÊ Ã…> LiÊ Ã«iVˆvˆi` vœÀÊ Ì…i }>ÃÊ `i˜ÃˆÌÞ vœÀÊ Ü…ˆV…Ê ̅i “iÌiÀÊ Üˆ

œ«iÀ>ÌiÊ܈̅ˆ˜Ê̅iÊëiVˆvˆV>̈œ˜Ãʜv “iÌiÀÊ«iÀvœÀ“>˜Vi `ivˆ˜i` ˆ˜ V>ÕÃi x°

/…i “>݈“Õ“ vœÜÊ À>Ìi ˆ˜ VÕLˆV “iÌiÀà «iÀÊ …œÕÀÊ ­“ÎɅ® ˆÃÊ > ˜Õ“LiÀÊ ˆ˜ , x œvÊ Ì…iÊ ÃiÌÃÊ œv «ÀiviÀÀi`

˜Õ“LiÀÃʏˆÃÌi` ˆ˜ -"ÊÎ ­Ì…iÊÛ>Õi œvÊÈÎʅ>ÃÊLii˜ÊÀœÕ˜`i`Ê̜ÊÈx®°

4HE MAXIMUM OVERALL DISTANCE IN MILLIMETRES MEASURED FROMMETER AXIS SHOULD NOT

x iÌÀœœ}ˆV> «iÀvœÀ“>˜ViÊÀiµÕˆÀi“i˜ÌÃ

x°£ i˜iÀ>

«iÀvœÀ“>˜Vi œv ̅iÊ ÌÞ«i œv “iÌiÀ° v œ˜iÊ ÌÞ«i œv “iÌiÀÊ Vœ“«ÀˆÃiÃÊ >Ê À>˜}i œvÊ ÃˆâiÃÊ œvÊ Ì…iÊ Ã>“i L>ÈV

`iÈ}˜ >˜` >Ê À>˜}i œv “iÌiÀˆ˜} Vœ˜`ˆÌˆœ˜Ã]Ê Ì…iÊ ÌÞ«iÊ ÌiÃÌ “>Þ Li «iÀvœÀ“i` œ˜ > ˆ“ˆÌi` ˜Õ“LiÀÊ œvÃ>“«i “iÌiÀà ­£Ê̜ÊÈÊÃ>“«iÃʈÀÀiëiV̈Ûi œvÊÈâi® Liˆ˜}ÊÀi«ÀiÃi˜Ì>̈Ûi vœÀ ̅>Ì À>˜}i œv “iÌiÀ Èâià >˜`

“iÌiÀˆ˜} Vœ˜`ˆÌˆœ˜Ã°

Vœ˜`ˆÌˆœ˜ÃÊ՘`iÀ ܅ˆV…Ê̅iÊÌiÃÌ ÌœœŽ «>Vi°

/…i “iÌiÀÊÅ> Li vˆÌÌi`Ê܈̅ > Vœ“«œ˜i˜Ìà ܅ˆV… “>Þ >vviVÌÊ̅i “iÌÀœœ}ˆV> «iÀvœÀ“>˜Vi°

i˜iÀ>ÊÀiµÕˆÀi“i˜Ìà vœÀÊ̅iÊÌiÃÌ v>VˆˆÌÞÊ̜ LiÊÕÃi` vœÀÊ̅iÊÌÞ«iÊÌiÃÌ >Ài }ˆÛi˜ ˆ˜ >˜˜iÝ
°

7…iÀiÊ̅iÊÌiÝÌÊÀiviÀÃÊ̜ > }>ÃÊvœÀÊvœÜÊÌiÃÌÃÊ̅ˆÃʓi>˜ÃÊ>ˆÀʜÀ > }>à vÀœ“ ̅i £ÃÌ œÀ Ә` }>à v>“ˆÞ œÀ >˜Þ

œÌ…iÀÊ }>ÃÊ «ÀœÛˆ`i` ˆÌÊ ˆÃ ވi`ˆ˜}Ê Ãˆ“ˆ>ÀÊ “iÌÀœœ}ˆV>Ê ÀiÃՏÌà >ÌÊ > ,iޘœ`ÃÊ ˜Õ“LiÀÊ ÜˆÌ…ˆ˜ ´ x ¯ œv ̅i,iޘœ`ÃʘՓLiÀÊ>ÌÊ̅i vœÀiÃii˜ “iÌiÀˆ˜} Vœ˜`ˆÌˆœ˜Ã°

/…iÊ ÌœÌ>Ê ՘ViÀÌ>ˆ˜ÌÞ œvÊ Ì…i iµÕˆ«“i˜ÌÊ ÕÃi`Ê Ìœ “i>ÃÕÀiÊ Ì…i iÀÀœÀÊ œv ˆ˜`ˆV>̈œ˜Ê Å> Li V>VՏ>Ìi`

/>Li { p >݈“Õ“ «iÀ“ˆÃÈLi iÀÀœÀÃ

œÜÊÀ>Ìi + >݈“Õ“ «iÀ“ˆÃÈLi iÀÀœÀÃ

&OR A METERINDICATIONSHALL BE CARRIED OUT(OWEVER FOR

xổốổốổốÊ /iấỉ

/…i iầầœầʜv ˆ˜`ˆV>ỉˆœ˜ œvÊỉ…i “iỉiầÊấ…> Li `iỉiầ“ˆ˜i` >ỉÊũ>ầˆœỏấ vœưÊầ>ỉiấʈ˜Êỉ…i vœœưˆ˜} œầ`iầ\Êả]ốx S+“>Ý]Êả]đả S+“>Ý]Êả]{ả S+“>Ý]+“>Ý] ư…iầiÊỉ…i V…>˜}i vầœ“Êả]{ S+“>ÝÊỉœ+“>݈ấÊ`œ˜iÊũˆ>

ẳ]ẳảÊS+“>Ý] ˆ˜ œầ`iầÊỉœ >ỡỡầœ>V…+“>Ývầœ“ > …ˆ}…iầÊvœưÊầ>ỉiổ
ỉÊi>V… vœưÊầ>ỉiÊỉ…i iầầœầÊấ…> Li

`iỉiầ“ˆ˜i`Êỉ…ầiiÊỉˆ“iấÊưˆỉ…œỏỉ V…>˜}ˆ˜}Êỉ…i vœưÊầ>ỉiổ /…i VẺViÊấ…> LiÊầiỡi>ỉi`Êỉ…ầiiÊÊỉˆ“iấổ /…iÊỉiấỉ

ấ…> Li V>ầầˆi` œỏỉÊưˆỉ… > }>ấÊ>ỉÊ>ỉ“œấỡ…iầˆV Vœ˜`ˆỉˆœ˜ấÊỨ” ẳảả “L>ầợ œầÊ>ỉÊỉ…i œưiấỉ ỡầiấấỏầi

`iấˆ}˜>ỉi` œ˜Êỉ…i “iỉiầổ

/…i ˜ˆ˜iÊầiấỏỉˆ˜} iầầœầấ œv ˆ˜`ˆV>ỉˆœ˜ >ỉÊi>V… vœưÊầ>ỉiÊấ…> LiÊưˆỉ…ˆ˜ >Êấỡ>˜ œvÊả]ốÊỪổ

xổốổịÊ ˆ˜i>ầˆỉẺ

xổốổịổẳ ,iÌỏˆầi“i˜ỉấ

œầ ỉ…iÊỉiấỉ vœưÊầ>ỉiấÊvầœ“Êả]ốx S+“>ÝÊỉœ+“>Ý>ỉÊi>V…Êỉiấỉ ỡầiấấỏầiÊỉ…i `ˆvviầi˜ViấÊLiỉưii˜Êỉ…i …ˆ}…iấỉ

>˜`Êỉ…i œưiấỉ iầầœầʜv ˆ˜`ˆV>ỉˆœ˜Êấ…> ˜œỉÊiÝVii`Êỉ…iÊũ>ỏiấÊấỡiVˆvˆi` ˆ˜ />LiÊđổ

/>LiÊđ p
œư>Li `ˆvviầi˜ViấÊLiỉưii˜Êỉ…i …ˆ}…iấỉ >˜` œưiấỉ iầầœầʜv ˆ˜`ˆV>ỉˆœ˜ >ỉÊi>V…Êỉiấỉ

ỡầiấấỏầi

*ầiấấỏầi -ˆâi

xổốổịổố /iấỉ

˜ œầ`iầÊỉœ `iỉiầ“ˆ˜i ˆv ỉ…i ˆ˜i>ầˆỉẺ ầiÌỏˆầi“i˜ỉʈấÊvỏvˆi`Êỉ…iÊũ>ỏi œvÊỉ…i iầầœầấ vœỏ˜` >ỉÊi>V… vœưÊầ>ỉi

>VVœầ`ˆ˜}Êỉœ xổốổẳổốÊấ…> LiÊỉ>Ži˜ổ

xổốổ{

xổốổ{ổẳ ,iÌỏˆầi“i˜ỉấ

iỉiầấ ấ…>Ê ầiỉ>ˆ˜Ê ỉ…i >VVỏầ>VẺÊ œvÊ ỉ…iˆầÊ “iỉầœœ}ˆV> V…>ầ>VỉiầˆấỉˆVấ] ưˆỉ…ˆ˜ `ivˆ˜i` ˆ“ˆỉấ] œũiầÊ ỉ…iˆầiÝỡiVỉi` ˆviổ /œ ỡầœũiÊỉ…ˆấÊỉ…i “iỉiầấÊấ…>Êỏ˜`iầ}œ >˜ i˜`ỏầ>˜ViÊỉiấỉổ

/…i `ˆvviầi˜Vi ˆ˜ iầầœầʜv ˆ˜`ˆV>ỉˆœ˜ Liỉưii˜Êỉ…iÊấỉ>ầỉ >˜` i˜` œvÊỉ…iÊỉiấỉÊấ…> Li iấấÊỉ…>˜ œ˜iÊỉ…ˆầ` œv

ỉ…i “>݈“ỏ“ ỡiầ“ˆấấˆLi iầầœầÊ}ˆũi˜ ˆ˜ />Li {ổ

xổốổ{ổốÊ /iấỉ

"˜iÊỉœÊấˆÝÊấ>“ỡi “iỉiầấ œv i>V…ÊỉẺỡi ˆầầiấỡiVỉˆũi œvÊấˆâiÊấ…> LiÊỏấi` vœầÊỉ…i i˜`ỏầ>˜ViÊỉiấỉổ

iỉiầấÊấ…> LiÊỉiấỉi`Êưˆỉ…Êỉ…iˆầ ˆ˜`ˆV>ỉˆ˜} `iũˆViấÊvˆỉỉi`ổ

/…i `ỏầ>ỉˆœ˜ œvÊỉ…iÊỉiấỉÊấ…> LiÊấỏV…Êỉ…>ỉÊi>V… “iỉiầʓi>ấỏầiấ >Êũœỏ“i Vœầầiấỡœ˜`ˆ˜} ỉœ ẳÊảảảʅ œv

œỡiầ>ỉˆœ˜ œvÊỉ…i “iỉiầÊ>ỉÊỉ…i “>݈“ỏ“ vœưÊầ>ỉiậÊỉ…iÊỉiấỉÊấ…> Li Vœ“ỡiỉi`Êưˆỉ…ˆ˜Êốʓœ˜ỉ…ấổ

!After the test, the error of indication shall not exceed the maximum permissible error given in Table 4."



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