SIST EN 12405-1:2005/kFprA2:2010

SLOVENSKI STANDARD
01-julij-2010
Plinomeri - Korektorji - 1. del: Volumska konverzija - Dopolnilo A2
Gas meters - Conversion devices - Part 1: Volume conversion
Gaszähler - Umwerter - Teil 1 : Volumenumwertung
Compteurs de gaz - Dispositifs de conversion - Partie 1: Conversion de volume
Ta slovenski standard je istoveten z: EN 12405-1:2005/FprA2
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
FINAL DRAFT
EN 12405-1:2005
NORME EUROPÉENNE
EUROPÄISCHE NORM
FprA2
March 2010
ICS 91.140.40
English Version
Gas meters - Conversion devices - Part 1: Volume conversion
Compteurs de gaz - Dispositifs de conversion - Partie 1: Gaszähler - Umwerter - Teil 1 : Volumenumwertung
Conversion de volume
This draft amendment is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee
CEN/TC 237.
This draft amendment A2, if approved, will modify the European Standard EN 12405-1:2005. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.

This draft amendment was established by CEN in three official versions (English, French, German). A version in any other language made
by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12405-1:2005/FprA2:2010: E
worldwide for CEN national Members.

Contents Page
Foreword . 3
1 Modifications to the Foreword . 4
2 Modifications to Clause 2, Normative references . 4
3 Modification to 6.1.7 . 4
4 Modification to 7.1, General . 4
5 Modification to 8.3.1.2, Conversion devices type 2 . 4
6 Modification to 9.2.1, Test conditions . 5
7 Addition of A.18, Short time DC power variations . 9
8 Addition of A.19, Surges on supply lines and/or signal lines . 10
9 Addition of A.20, Power frequency magnetic field . 11
10 Addition of E.18, Short time DC power variations . 11
11 Addition of E.19, Surges on supply lines and/or signal lines . 12
12 Addition of E.20, Power frequency magnetic field . 13
13 Modifications to Annex ZA . 15

Foreword
This document (EN 12405-1:2005/FprA2:2010) has been prepared by Technical Committee CEN/TC 237 “Gas
meters”, the secretariat of which is held by BSI.
This document is currently submitted to the Unique Acceptance Procedure.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of 2004/22/EEC.
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
In the preparation of this European Standard, the content of OIML Publication, “International Document 11”,
“International Recommendation 137-1” and “International Recommendation 140” and the content of member bodies’
national standards on gas-volume electronic conversion devices have been taken into account.

1 Modifications to the Foreword
st
In the 1 paragraph, replace "(EN 12405-1:2005/A1:2006)" with "(EN 12405-1:2005+A2:2010)".
nd
In the 2 paragraph, delete "Amendment to the" and "EN 12405-1:2005".
2 Modifications to Clause 2, Normative references
Add the following references:
"EN 61000-4-5, Electromagnetic compatibility (EMC) — Part 4-5: Testing and measurement techniques — Surge
immunity test (IEC 61000-4-5:2005)" ,
"EN 61000-4-8, Electromagnetic compatibility (EMC) — Part 4: Testing and measurement techniques — Section 8:
Power frequency magnetic field immunity test (IEC 61000-4-8:1993 + A1 2001)" and
"EN 61000-4-29, Electromagnetic Compatibility (EMC) — Part 4-29: Testing and measurement techniques — Voltage
dips, short interruptions and voltage variations on d.c. input power port immunity tests (IEC 61000-4-29:2000)".
Delete the references to EN 50015, EN 50017, EN 50020 and prEN 50039.
Add the following references:
"EN 60079-5, Explosive atmospheres — Part 5: Equipment protection by powder filling "q" (IEC 60079-5:2007)
EN 60079-6, Explosive atmospheres — Part 6: Equipment protection by oil immersion "o" (IEC 60079-6:2007)" and
"EN 60079-11, Explosive atmospheres — Part 11: Equipment protection by intrinsic safety "i" (IEC 60079-11:2006)
EN 60079-25, Electrical apparatus for explosive gas atmospheres — Part 25: Intrinsically safe systems (IEC 60079-
25:2003)".
3 Modification to 6.1.7
Replace "EN 50015, EN 50017, EN 50020, EN 60079-0, EN 60079-1, EN 60079-2, EN 60079-7 and prEN 50039" with
"EN 60079-0, EN 60079-1, EN 60079-2, EN 60079-5, EN 60079-6, EN 60079-7, EN 60079-11 and EN 60079-25".
4 Modification to 7.1, General
In the 5th paragraph, replace "EN 50015, EN 50017, EN 50020, EN 60079-0, EN 60079-1, EN 60079-2, EN 60079-7
and EN 50039" with "EN 60079-0, EN 60079-1, EN 60079-2, EN 60079-5, EN 60079-6, EN 60079-7, EN 60079-11
and EN 60079-25".
5 Modification to 8.3.1.2, Conversion devices type 2
Replace Table 3 with the following: "
Indication or element Reference conditions Rated operating conditions
Main indication (e ) for PT and PTZ 0,5 1
c
conversion
Calculator (e ) 0,2 0,3
f
Temperature (e ) 0,1 0,2
t
Pressure (e ) 0,2 0,5
p
Main indication for T conversion only 0,5 0,7
".
6 Modification to 9.2.1, Test conditions
Replace text of sub-clause with the following paragraphs and table:
"The device shall meet the requirements specified in Table 4.

Clause Tests Acceptance criteria Timing Test procedure
A.2 Accuracy MPE D PR1
A.3 Ambient temperature MPE D PR2
A.4 Damp heat, steady state MPE BDA PR3
BA
A.5 Cyclic damp heat MPE PR3
A.6 Electrical power variation MPE BD PR3
A.7 Short time AC power reductions ∆e ≤ MPE BD PR4
A.8 Electrical bursts ∆e ≤ MPE BD PR4
A.9 Electromagnetic immunity ∆e ≤ MPE BD PR4
A.10 Electrostatic discharges ∆e ≤ MPE BD PR4
A.11 Overload of pressure ∆e ≤ MPE BA PR5
BA
A.12 Random vibrations MPE PR3
A.13 Shocks ∆e ≤ MPE BA PR4
A.14 Overload of pressure (mechanical) operable A PR4
A.15 Durability ∆e ≤ 0,5 MPE BA PR2
A.16 Alarms' operation operable D PR4
A.17 Repeatability ∆e ≤ MPE/3 D PR2
A.18 Short time DC power variations ∆e ≤ MPE BD PR4
A.19 Surges on supply lines and/or signal lines ∆e ≤ MPE BA PR4
A.20 Power frequency magnetic field ∆e ≤ MPE BD PR4
Test procedure: PR1, PR2, PR3, PR4 (See Annex A)
Timing: B: Before, D: During, A: After
∆e: see Annex E
For the acceptance criteria, ∆e needs to be compared with MPE given in Tables 2 and 3.

The tests shall be performed using reference instruments traceable to national standards. The uncertainties shall be
determined, including those arising from their use, and shall not exceed one fifth of the maximum permissible errors.
The conventional true value of the compression factor shall be computed according to EN ISO 12213-3:2005 or
outside the limits of this method, with the methods described in EN ISO 12213-2:2005. When used with first family
gases it is necessary to check this against a first family gas calculation method.
Following the type approval of a gas-volume conversion device, any modification(s) to the device shall be validated
with tests relevant to the modification(s). A complete set of tests per modification is not required.
9.2.3 Samples of gas volume conversion device type 1 required for testing
Replace text of sub clause by the following paragraph and tables:
The number of samples to be tested is indicated in the tables below, according to the number of variants. Each gas
volume conversion device tested shall satisfy the performance requirements specified in Clause 8.
The following provisions have to be taken into account:
a) A conversion device may be offered with a choice of different pressure ranges (and/or temperature ranges). Each
pressure (and/or temperature) range will invariably be due to the use of different pressure (and/or temperature)
transducers. In addition, it may be that the manufacture uses several transducer suppliers, all providing
transducers with the same measurement range.
In this clause, "variant" refers to each different type of transducer, or combination of, transducers howsoever
caused.
b) If the conversion device is intended to be used for T conversion and PT conversion, or for T conversion and PTZ
conversion, an additional sample shall be submitted for test.
If the number of variants is higher or equal to 2 the number of samples applicable to the testing procedure shall be
adapted in accordance with the characteristics of the different types of transducers.
The methods are illustrated through the three different cases as follows:
Case 1:
Where the number of variants is equal to 1 the number of samples shall be at least as given in Table 5:
Table 5 — Conversion devices type 1: test samples where only one variant of device is available (case 1)

Recommended sequence
in which tests are carried out
a
Sample S1 Sample S2 Sample S3
Clause Test
A.2 Accuracy X X X
A.16 Alarms’ operation X X
A.17 Repeatability X X
A.3 Ambient temperature X X
A.4 Damp heat, steady state X X
A.5 Cyclic damp heat X X
A.6 Electrical power variation X X
A.7 Short time AC power reductions X X
A.8 Electrical bursts X X
A.9 Electromagnetic immunity X X
A.10 Electrostatic discharges X X
A.18 Short time DC power variations X X
A.19 Surges on supply lines and/or signal lines X X
A.20 Power frequency magnetic field X X
A.11 Overload of pressure X X
A.12 Random vibrations X X
A.13 Shocks X X
A.14 Overload of pressure (mechanical) X X
A.15 Durability X
a
If necessary, see provision b) above.

Case 2:
Where the conversion device includes only one type of pressure transducer (e.g. transducer from the same supplier
and from the same family) but the pressure transducer is available for three different measuring ranges R1, R2 and
R3. In this case, the test samples are in accordance with Table 6.
Table 6 — Conversion devices type 1: test samples where there are three ranges of pressure transducers
from the same family (case 2)
Recommended sequence
Sample Sample Sample
in which tests are carried out
range R1 range R2 range R3
Clause Test
A.2 Accuracy X X X
A.16 Alarms’ operation X X X
A.17 Repeatability X X X
A.3 Ambient temperature X X X
A.4 Damp heat, steady state X X X
A.5 Cyclic damp heat X
A.6 Electrical power variation X
A.7 Short time AC power reductions X
A.8 Electrical bursts X
A.9 Electromagnetic immunity X
A.10 Elect
...