EN 12405-1:2005/A1:2006

SLOVENSKI STANDARD
01-februar-2007
Plinomeri - Korektorji - 1. del: Volumska konverzija - Dopolnilo A1
Gas meters - Conversion devices - Part 1: Volume conversion
Gaszähler - Umwerter - Teil 1 : Volumenumwerter
Compteurs a gaz - Dispositifs de conversion - Partie 1 : Conversion de volume
Ta slovenski standard je istoveten z: EN 12405-1:2005/A1:2006
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
EN 12405-1:2005/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2006
ICS 91.140.40
English Version
Gas meters - Conversion devices - Part 1: Volume conversion
Compteurs à gaz - Dispositifs de conversion - Partie 1 : Gaszähler - Umwerter - Teil 1 : Volumenumwertung
Conversion de volume
This amendment A1 modifies the European Standard EN 12405-1:2005; it was approved by CEN on 6 July 2006.
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. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the Central Secretariat or to any CEN member.
This amendment exists 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 Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12405-1:2005/A1:2006: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
3.3 Classification.4
3.3.1 Mechanical classes .4
3.3.2 Electromagnetic Environmental classes.5
5.1.4 Gas characteristics.5
5.1.5 Base conditions .5
5.2 Environmental conditions.5
5.2.1 Ambient temperature range.5
5.2.2 Humidity range.5
5.2.3 Mechanical environment.5
5.2.4 Electromagnetic environment .6
5.3 Power supply.6
6.1 Construction requirements.6
6.5 Battery powered conversion device .6
6.6 Security devices and alarms .6
7.1 General.6
8.3.1 General.7
8.3.3 Specific errors for a gas-volume conversion device, type 2.7
8.8 Repeatability.7
8.9 Reliability.7
9.2.1 Test conditions .8
9.2.3 Samples of gas volume conversion device type 1 required for testing.8
9.3 Test reports .9
10 Marking .9
11 Installation and operating instructions .10
A.3.3 Procedure .10
A.5.3 Procedure .10
A.17 Repeatability.10
A.17.1 Objective.10
A.17.2 Reference to standards.10
A.17.3 Procedure .11
A.17.4 Acceptance criteria.11
E.16 Alarms operation .11
E.16.1 Ambient temperature during the test .11
E.16.2 Test equipment used.11
E.16.3 Test results.11
E. 17 Repeatability.11
F.16 Repeatability.12
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2004/22 Measuring Instruments Directive.13
Bibliography .17

Foreword
Replace the first three paragraphs by the following ones:
This document (EN 12405-1:2005/A1:2006) has been prepared by Technical Committee CEN/TC 237 “Gas
meters”, the secretariat of which is held by BSI.
This Amendment to the European Standard EN 12405-1:2005 shall be given the status of a national standard,
either by publication of an identical text or by endorsement, at the latest by February 2007, and conflicting
national standards shall be withdrawn at the latest by February 2007.
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 EU Directive 2004/22 Measuring
Instruments Directive (MID).
For relationship with EU Directive 2004/22, 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 following
countries 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.
Delete the next to the last paragraph:
"The metrological aspects of this European Standard may be subject to amendments to bring it into line with
the proposed Measuring Instruments Directive (MID)."
1 Scope
After third paragraph insert:
This document is not relevant to temperature conversion integrated into gas meters which only indicate the
converted volume.
2 Normative references
Add the following reference:
EN 60730-1:2000, Automatic electrical controls for household and similar use - Part 1: General requirements
(IEC 60730-1:1999, modified)
3 Terms and definitions
Replace the definitions for the terms 3.1.2 and 3.1.27 by the following:
3.1.2
base conditions
specified conditions to which the measured quantity of gas is converted
3.1.27
rated operating conditions
values for the measurand and influence quantities making up the normal working conditions of an instrument
Delete NOTE attached to Definition 3.1.27
Add the following definitions:
3.1.35
measurand
particular quantity subject to measurement
3.1.36
critical change value
value at which the change in the measurement result is considered undesirable
Add
3.3 Classification
3.3.1 Mechanical classes
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 from
local blasting or pile-driving activities, slamming doors, etc.
M2 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.
3.3.2 Electromagnetic Environmental classes
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.
E2 This class applies to instruments used in locations with electromagnetic disturbances corresponding to
those likely to be found in other industrial buildings.
5.1.3 Gas characteristics
Add:
The manufacturer shall indicate:
 gas family or group;
 maximum operating pressure.
Add new sub-clause:
5.1.4 Base conditions
The manufacturer shall specify the base conditions, or range of base conditions for converted quantities.
Replace title of 5.2 by the following:
5.2 Environmental conditions
5.2.1 Ambient temperature range
Replace text of subclause by the following paragraph:
The manufacturer shall specify the ambient temperature range of the gas-volume conversion device with a
minimum temperature range of 50 °C for the climatic environment, and the minimum temperature limit being
either -40 °C, -25 °C, -10 °C or 5 °C, and the maximum temperature limit being either 30 °C, 40 °C, 55 °C or
70 °C.
5.2.2 Humidity range
Add:
The manufacturer shall indicate whether the instrument is designed for condensing or non-condensing
humidity as well as the intended location for the instrument.
If designed for non-condensing humidity, the device shall meet the requirements of Test A.4.
If designed for condensing humidity, the device shall meet the requirements of Test A.5.
Add the following clauses:
5.2.3 Mechanical environment
The manufacturer shall specify the mechanical class for which the device is intended (M1 or M2) (See 3.3.1).
5.2.4 Electromagnetic environment
The device shall be able to operate under electromagnetic environmental class E2 (See 3.3.2)
5.3 Power supply
Replace text of sub-clause by the following:
The manufacturer shall specify the nominal value of the AC supply and/or the limits of DC supply.
The limits of DC supply shall be compatible with customers' requirements and/or the electricity supply of
country of destination.
6 Construction requirements
6.1.1 Replace in the last sentence of the first paragraph:
"in 8.5 and 8.6" by "in 8.5".
6.1.3 Replace in the first indent of the list:
"that can be altered, or using a specific device" by "that can be updated or by using a specific device".
6.3.1.2 Add the following item as first indent of the list:
 the base conditions in the form :

...