EN 60970:2007
(Main)Insulating liquids - Methods for counting and sizing particles
Insulating liquids - Methods for counting and sizing particles
Describes the sampling procedures and methods for the determination of particle concentration and size distribution. Three methods are specified. One uses an automatic particle size analyser, working on the light interruption principle. The other two use an optical microscope, in either the transmitted light or incident light mode, to count particles collected on the surface of a membrane filter. The optical microscope methods are described in ISO 4407. All three methods are applicable to both used and unused insulating liquids. Annex A contains an alternative sampling procedure using a syringe and Annex B reports a reference for the calibration of automatic particle counters. The significant technical changes with respect to the previous edition are as follows: - new calibration procedures for automated laser particle; - three figures contamination code; - new procedure of sample pre-treatment when automated laser counter method are used.
Isolierflüssigkeiten - Verfahren zur Bestimmung der Anzahl und Größen von Teilchen
Isolants liquides - Méthodes de détermination du nombre et de la taille des particules
Décrit les procédures de prélèvement et les méthodes pour déterminer la concentration des particules et la répartition selon leur taille. Trois méthodes sont recommandées. L'une d'entre elles utilise un analyseur automatique de particules, dont le principe repose sur l'interruption d'un faisceau lumineux. Les deux autres utilisent un microscope optique, en mode soit de lumière transmise soit de lumière incidente, pour compter les particules retenues à la surface d'une membrane filtrante. Les méthodes au microscope optique sont décrites dans l'ISO 4407. Ces trois méthodes sont applicables tant aux isolants liquides usagés qu'aux isolants liquides neufs. L'Annexe A comporte une autre procédure d'échantillonnage utilisant une seringue et l'Annexe B indique une référence pour l'étalonnage des compteurs automatiques de particules. Les principales modifications techniques par rapport à l'édition précédente sont les suivantes: - nouvelles procédures d'étalonnage pour les analyseurs automatiques de particules; - code de contamination à trois chiffres; - nouvelle procédure pour le pré-traitement d'échantillons quand la méthode des compteurs de particules automatisés est utilisée.
Izolacijske tekočine – Metode za štetje in ugotavljanje velikosti delcev (IEC 60970:2007)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2007
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Insulating liquids - Methods for counting and sizing particles
Isolierflüssigkeiten - Verfahren zur Bestimmung der Anzahl und Größen von Teilchen
Isolants liquides - Méthodes de détermination du nombre et de la taille des particules
Ta slovenski standard je istoveten z: EN 60970:2007
ICS:
17.220.99 Drugi standardi v zvezi z Other standards related to
elektriko in magnetizmom electricity and magnetism
29.040.01 Izolacijski fluidi na splošno Insulating fluids in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 60970
NORME EUROPÉENNE
August 2007
EUROPÄISCHE NORM
ICS 17.220.99. 29.040.10
English version
Insulating liquids -
Methods for counting and sizing particles
(IEC 60970:2007)
Isolants liquides - Isolierflüssigkeiten -
Méthodes de détermination du nombre Verfahren zur Bestimmung der Anzahl
et de la taille des particules und Größen von Teilchen
(CEI 60970:2007) (IEC 60970:2007)
This European Standard was approved by CENELEC on 2007-08-01. CENELEC 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 Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60970:2007 E
Foreword
The text of document 10/695/FDIS, future edition 2 of IEC 60970, prepared by IEC TC 10, Fluids for
electrotechnical applications, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60970 on 2007-08-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-05-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-08-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60970:2007 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60422 NOTE Harmonized as EN 60422:2006 (not modified).
ISO 4402 NOTE Harmonized as EN ISO 14402:1999 (not modified).
_________
- 3 - EN 60970:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1)
- - Insulating oil - Determination of fibre EN 50353 -
contamination by the counting method using
a microscope
1)
IEC 60475 - Method of sampling liquid dielectrics - -
1)
ISO 4406 - Hydraulic fluid power - Fluids - Method for - -
coding the level of contamination by solid
particles
1)
ISO 4407 - Hydraulic fluid power - Fluid contamination - - -
Determination of particulate contamination by
the counting method using an optical
microscope
1)
ISO 5884 - Aerospace - Fluid systems and components - - -
Methods for system sampling and measuring
the solid particle contamination of hydraulic
fluids
1)
Undated reference.
INTERNATIONAL IEC
STANDARD
CEI
NORME
Second edition
INTERNATIONALE
Deuxième édition
2007-07
Insulating liquids – Methods for counting and
sizing particles
Isolants liquides – Méthodes de détermination du
nombre et de la taille des particules
PRICE CODE
R
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur
– 2 – 60970 © IEC:2007
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 General caution, health, safety and environmental protection .6
4 Significance.7
5 Comparison and limitation of the methods .7
6 Types and identification of particles.8
7 Sampling .8
7.1 General remarks.8
7.2 Sampling vessels .9
7.3 Cleaning of sampling bottles .9
7.4 General directions for sampling .9
7.5 Sampling procedure .10
7.6 Labelling of samples.10
7.6.1 Samples from tanks .10
7.6.2 Samples from electrical equipment .10
8 Preparation of the samples for analysis .10
9 Method A – Automatic particle size analyzer.11
9.1 Summary of method .11
9.2 Apparatus and auxiliary materials.11
9.3 Calibration procedures .11
9.4 Preparation of the apparatus for counting.12
9.5 Preparation of sample before counting .12
9.6 Preparation of sample for counting .12
9.7 Counting procedures .12
9.8 Report .13
9.9 Precision .13
9.10 Repeatability .13
9.11 Reproducibility .13
10 Method B – Optical microscopy .14
10.1 Principle.14
10.2 Procedure by transmitted light .14
10.3 Procedure by incident light .14
Annex A (informative) Use of syringes as sampling vessels .15
Annex B (informative) Calibration of the automatic particle counters .17
Bibliography.18
60970 © IEC:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSULATING LIQUIDS – METHODS FOR COUNTING AND SIZING
PARTICLES
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60970 has been prepared by IEC technical committee 10: Fluids
for electrotechnical applications.
This second edition cancels and replaces the first edition published in 1989. This edition
constitutes a technical revision.
The significant technical changes with respect to the previous edition are as follows:
– new calibration procedures for automated laser particle;
– three figures contamination code;
– new procedure of sample pre-treatment when automated laser counter method are used.
– 4 – 60970 © IEC:2007
The text of this standard is based on the following documents:
FDIS Report on voting
10/695/FDIS 10/714/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
...
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