SIST EN ISO 17657-1:2007

Resistance welding - Welding current measurement for resistance welding - Part 1: Guidelines for measurement (ISO 17657-1:2005)

This Standard specifies equipment for calibration of measuring systems of welding current and indicating weld time in resistance welding using single-phase ac of frequency of 50 Hz or 60 Hz, or direct current. The guideline defines various basic terms for the measurement of welding current, and gives some basic information for users of welding current measuring systems including welding current meters with current sensing coil.

Widerstandsschweißen - Schweißstrommessung für das Widerstandsschweißen - Teil 1: Leitfaden für die Messung (ISO 17657-1:2005)

Soudage par résistance - Mesurage des courants en soudage par résistance - Partie 1: Lignes directrices pour le mesurage (ISO 17657-1:2005)

L'ISO 17657-1:2005 spécifie le matériel d'étalonnage pour les systèmes de mesurage du courant de soudage et d'affichage du temps de soudage dans le cas du soudage par résistance avec courant alternatif monophasé à 50 Hz ou à 60 Hz ou avec courant continu.
Elle fournit les lignes directrices définissant les différents termes de base relatifs au mesurage du courant de soudage et quelques informations de base aux utilisateurs de systèmes de mesurage du courant de soudage, y compris les ampèremètres avec tore de mesure de courant.

Uporovno varjenje - Merjenje jakosti varilnega toka pri uporovnem varjenju - 1. del: Smernice za merjenje (ISO 17657-1:2005)

General Information

• Status: Published
• Publication Date: 18-Jul-2007
• ICS: 25.160.10 - Welding processes
• Technical Committee: VAR - Welding
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-Jul-2007
• Due Date: 10-Sep-2007
• Completion Date: 19-Jul-2007
• Ref Project: EN ISO 17657-1:2007 - Resistance welding - Welding current measurement for resistance welding - Part 1: Guidelines for measurement (ISO 17657-1:2005)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 17657-1:2007
01-september-2007
Uporovno varjenje - Merjenje jakosti varilnega toka pri uporovnem varjenju - 1. del:
Smernice za merjenje (ISO 17657-1:2005)
Resistance welding - Welding current measurement for resistance welding - Part 1:
Guidelines for measurement (ISO 17657-1:2005)
Widerstandsschweißen - Schweißstrommessung für das Widerstandsschweißen - Teil 1:
Leitfaden für die Messung (ISO 17657-1:2005)
Soudage par résistance - Mesurage des courants en soudage par résistance - Partie 1:
Lignes directrices pour le mesurage (ISO 17657-1:2005)
Ta slovenski standard je istoveten z: EN ISO 17657-1:2007
ICS:
25.160.10 Varilni postopki in varjenje Welding processes
SIST EN ISO 17657-1:2007 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 17657-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2007
ICS 25.160.10

English Version
Resistance welding - Welding current measurement for
resistance welding - Part 1: Guidelines for measurement (ISO
17657-1:2005)
Soudage par résistance - Mesurage des courants en Widerstandsschweißen - Schweißstrommessung für das
soudage par résistance - Partie 1: Lignes directrices pour le Widerstandsschweißen - Teil 1: Leitfaden für die Messung
mesurage (ISO 17657-1:2005) (ISO 17657-1:2005)
This European Standard was approved by CEN on 19 May 2007.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard 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 CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17657-1:2007: E
worldwide for CEN national Members.

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EN ISO 17657-1:2007 (E)
Foreword
The text of ISO 17657-1:2005 has been prepared by Technical Committee ISO/TC 44 "Welding and allied
processes” of the International Organization for Standardization (ISO) and has been taken over as EN ISO
17657-1:2007 by Technical Committee CEN/TC 121 "Welding", the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by December 2007, and conflicting national standards shall be withdrawn
at the latest by December 2007.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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.

Endorsement notice
The text of ISO 17657-1:2005 has been approved by CEN as a EN ISO 17657-1:2007 without any
modification.

2

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INTERNATIONAL ISO
STANDARD 17657-1
First edition
2005-09-15

Resistance welding — Welding current
measurement for resistance welding —
Part 1:
Guidelines for measurement
Soudage par résistance — Mesurage des courants en soudage par
résistance —
Partie 1: Lignes directrices pour le mesurage





Reference number
ISO 17657-1:2005(E)
©
ISO 2005

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ISO 17657-1:2005(E)
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ii © ISO 2005 – All rights reserved

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ISO 17657-1:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 Welding current measuring system. 3
4.1 General. 3
4.2 Applicability. 3
4.3 Accuracy. 3
4.4 Welding current meter with current sensing coil . 4
5 Current sensors. 5
5.1 Type of sensor . 5
5.2 Selection of current sensor . 5
5.3 Conversion coefficient. 5
6 Tests and calibration of the welding current measuring systems . 6
7 Selection of requirements and test procedures for a welding current measuring system . 6
Annex A (normative) Definition of weld times. 8
Annex B (informative) Types of integrator and equivalent current sensing coil circuits. 9
Annex C (informative) Conversion coefficient and maximum output voltage of current sensing
coils. 11

© ISO 2005 – All rights reserved iii

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ISO 17657-1:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 17657-1 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 6, Resistance welding.
ISO 17657 consists of the following parts, under the general title Resistance welding — Welding current
measurement for resistance welding:
 Part 1: Guidelines for measurement
 Part 2: Welding current meter with current sensing coil
 Part 3: Current sensing coil
 Part 4: Calibration system
 Part 5: Verification of welding current measuring system
iv © ISO 2005 – All rights reserved

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ISO 17657-1:2005(E)
Introduction
Requests for official interpretations of any aspect of this part of ISO 17657 should be directed to the
Secretariat of ISO/TC 44/SC 6 via your national standards body. A complete listing of these bodies can be
found at http://www.iso.org.

© ISO 2005 – All rights reserved v

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INTERNATIONAL STANDARD ISO 17657-1:2005(E)

Resistance welding — Welding current measurement for
resistance welding —
Part 1:
Guidelines for measurement
1 Scope
This part of ISO 17657 specifies equipment for the calibration of measuring systems of welding current and
indicating weld time in resistance welding using single-phase alternating current of frequency 50 Hz or 60 Hz,
or direct current.
The guidelines define various basic terms for the measurement of welding current, and give some basic
information for users of welding current measuring systems including welding current meters with current
sensing coil.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 669, Resistance welding — Resistance welding equipment — Mechanical and electrical requirements
ISO 17657-2:2005, Resistance welding — Welding current measurement for resistance welding — Part 2:
Welding current meter with current sensing coil
ISO 17657-3, Resistance welding — Welding current measurement for resistance welding — Part 3: Current
sensing coil
ISO 17657-4, Resistance welding — Welding current measurement for resistance welding — Part 4:
Calibration system
ISO 17657-5, Resistance welding — Welding current measurement for resistance welding — Part 5:
Verification of welding current measuring system
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 669 and the following apply.
3.1
test
technical operation that consists of the determination of one or more characteristics or performance of a given
product or equipment according to a specified procedure
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ISO 17657-1:2005(E)
3.2
verification
confirmation by examination and provision of evidence that specified requirements have been met
3.3
calibration
set of operations that establish, under specified conditions, the relationship between values indicated by the
measuring instrument or measuring system, and the corresponding values of a measuring instrument or
measuring system with confirmed higher accuracy
3.4
welding current measuring system
〈resistance welding〉
measuring system that measures the welding current value and/or welding current waveform at the primary or
secondary circuit of a welding transformer by using a sensing coil, non-inductive shunt or other suitable
sensors
3.5
welding current meter
〈resistance welding〉
meter of portable type, or built into the weld controller for measuring short period current and which consists of
at least a data capturing and calculating unit (e.g. integrator and accumulating unit) and a display unit
3.6
master welding current meter
welding current meter calibrated against a reference welding current meter
3.7
reference welding current meter
welding current meter which is sufficiently well-established to be used for the calibration of welding measuring
systems or welding current meters
3.8
certified reference equipment
reference equipment which is certified by a technically valid procedure, accompanied by, or traceable to, a
certificate or other documentation issued by a certifying body
3.9
current sensing coil (toroidal coil or Rogowski coil)
multi-wound coils, in which wire is wound around a non-magnetic core of constant cross section, for detecting
the magnetic flux generated by current
3.10
weld time
time during which the welding current is applied, expressed as a number of cycles or a length of time in
milliseconds
NOTE Annex A gives further information on the definition of weld time.
3.11
current flow time
duration defined from the start time of current conduction to the time when its current has decreased to a 10 %
level of the measured welding current value, which is applied only to direct current for determination of
minimum value of the hold time
NOTE 1 Annex A gives further information on the definition of current flow time.
NOTE 2 Current flow time is applicable only to direct current.
2 © ISO 2005 – All rights reserved

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ISO 17657-1:2005(E)
3.12
welding current
current value accumulated over the weld time and indicat
...