SIST IEC 60839-1-2:1995

Alarm systems. Part 1: General requirements. Section Two: Power units, test methods and performance criteria

Specifies the requirements, test methods and performance criteria for alarm system power units. Specific requirements for particular components are specified in separate standards which should be used in conjunction with this standard.

Systèmes d'alarme. Première partie: Prescriptions générales. Section deux: Dispositifs d'alimentation, méthodes d'essai et caractéristiques de fonctionnement

Définit les prescriptions, méthodes d'essai et caractéristiques de fonctionnement relatives aux dispositifs d'alimentation des systèmes d'alarme. Les prescriptions spécifiques aux composants des systèmes sont données dans des normes séparées qui doivent être utilisées avec la présente norme.

Alarm systems - Part 1: General requirements - Section Two: Power units, test methods and performance criteria

General Information

• Status: Published
• Publication Date: 31-Aug-1995
• ICS: 13.320 - Alarm and warning systems
• Technical Committee: EAL - Alarm systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Sep-1995
• Due Date: 01-Sep-1995
• Completion Date: 01-Sep-1995
• Ref Project: IEC 60811-409:2012 - Electric and optical fibre cables - Test methods for non-metallic materials - Part 409: Miscellaneous tests - Loss of mass test for thermoplastic insulations and sheaths

Standards Content (Sample)

SLOVENSKI STANDARD
SIST IEC 60839-1-2:1995
01-september-1995
Alarm systems - Part 1: General requirements - Section Two: Power units, test
methods and performance criteria
Alarm systems. Part 1: General requirements. Section Two: Power units, test methods
and performance criteria
Systèmes d'alarme. Première partie: Prescriptions générales. Section deux: Dispositifs
d'alimentation, méthodes d'essai et caractéristiques de fonctionnement
Ta slovenski standard je istoveten z: IEC 60839-1-2
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
SIST IEC 60839-1-2:1995 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST IEC 60839-1-2:1995

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SIST IEC 60839-1-2:1995
NORME CEI
INTERNATIONALE IEC
60839-1-2
INTERNATIONAL
Première édition
STANDARD
First edition
1987-12
Systèmes d'alarme
Première partie: Prescriptions générales
Section deux — Dispositifs d'alimentation, méthodes
d'essai et caractéristiques de fonctionnement
Alarm systems
Part 1: General requirements
Section Two — Power units,
test methods and performance criteria
© IEC 1987 Droits de reproduction réservés — Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
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Pour prix, voir catalogue en vigueur
• • For price, see current catalogue

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SIST IEC 60839-1-2:1995
IEC 1987 – 3 –
839-1-2 ©
CONTENTS
Page
FOREWORD 5
5
PREFACE
Clause
1. Scope 7
2. Object 7
7
3. Reference documents
9
4. Definitions
9
5. Requirements
6. Testing 15

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SIST IEC 60839-1-2:1995
839-1-2 © IEC 1987 — 5 —
INTERNATIONAL ELECTROTECHNICAL COMMISSION
ALARM SYSTEMS
Part 1: General requirements
Section Two — Power units,
test methods and performance criteria
FOREWORD
I) The formal decisions of agreements of the I EC on technical matters, prepared by Technical Committees on which all the
National Committees having a special interest therein are represented, express, as nearly as possible, an inte rnational consensus
of opinion on the subjects dealt with.
2) They have the form of recommendations for inte
rnational use and they are accepted by the National Committees in that
sense.
3) In order to promote intern
ational unification, the I EC expresses the wish that all National Committees should adopt the text of
the I E C recommendation for their national rules in so far as national conditions will permit. Any divergence between the I EC
recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.
PREFACE
This standard has been prepared by IEC Technical Committee No. 79: Alarm systems.
The text of this standard is based on the following documents:
Six Months' Rule Report on Voting
79(CO)5
79(CO)10
Full information on the voting for the approval of this standard can be found in the Voting Repo rt
indicated in the above table.

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SIST IEC 60839-1-2:1995
1987 – 7
839-1-2 © IEC
ALARM SYSTEMS
Part 1: General requirements
Section Two — Power units,
test methods and performance criteria
1. Scope
This standard specifies the requirements, test methods and performance criteria for power
supply units for alarm systems. The specific requirements for particular system components are
specified in separate standards, which shall be used in conjunction with this standard. The
configuration of the power supply will depend upon the available sources of power and the
requirements of the alarm systems and shall consist of one or more of the following:
a) Primary batteries.
b) Secondary batteri
es (with or without a built-in charger from an external safety extra low
voltage source (SELV)).
c)
Power units with mains supply via safety isolating transformer,
i)
with no other components;
ii)
with a rectifier for supplying direct current;
iii)
with a secondary battery and charger as back-up supply;
iv) with a primary battery as a back-up supply;
v) incorporating an inverter or "switching mode" unit.
d) A combination of the types indicated in a), b) and c) to form a composite power supply
unit.
Certain central stations use higher voltages which are not considered in this standard.
2. Object
The object of this standard is to specify requirements, test methods and performance criteria for
electrical power units for use as pa rt of an alarm system.
3. Reference documents
IEC publications quoted in this standard:
Publications Nos. 65 (1985): Safety requirements for mains operated electronic and related apparatus for house-
hold and similar general use.
86: Primary batteries.
271 (1974): List of basic terms, definitions and related mathematics for reliability.
285 (1983): Sealed nickel-cadmium cylindrical rechargeable single cells.

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SIST IEC 60839-1-2:1995
839-1-2 © IEC 1987 — 9 —
300 (1984): Reliability and maintainability management.
509 (1976): Sealed nickel-cadmium button rechargeable single cells.
622 (1978): Sealed nickel-cadmium prismatic rechargeable single cells.
623 (1983): Open nickel-cadmium prismatic rechargeable cells.
742 (1983): Isolating transformer and safety isolating transformers. Requirements.
839-1-1: Alarm systems, Part 1: General requirements. Section One — General (under con-
sideration).
839-1-3 (1987): Section Three — Environmental testing.
Other publication:
ISO Standard 532-1975: Acoustics — Method for calculating loudness level.
4. Definitions
For the purpose of this standard the following definitions apply.
4.1 Final voltage
The voltage to which a battery falls when discharged under specified conditions.
Power unit
4.2
A device that modifies, stores or isolates electrical power for an alarm system, either as a
of control and indicating equipment, and provides power for an
separate unit or as an integral pa rt
alarm and for the system under normal, alarm and fault conditions.
5. Requirements
5.1 Primary cells
Primary cells shall comply with the requirements of I EC Publication 86, except that where
technically more advanced types are specified (e.g. lithium cells), these may be specified as long as
they cannot cause a hazard or substantial loss of performance of the alarm system.
5.2 Secondary cells
5.2.1 Any type of secondary cells may be used. If nickel-cadmium cells are used they shall comply with
the relevant standard:
—IEC Publication 285.
—IEC Publication 509.
—IEC Publication 622.
—IEC Publication 623.
Other types of cells shall comply with the relevant I
...

IEC 60811-409
®

Edition 1.0 2012-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Electric and optical fibre cables – Test methods for non-metallic materials –
Part 409: Miscellaneous tests – Loss of mass test for thermoplastic insulations
and sheaths

Câbles électriques et à fibres optiques – Méthodes d’essai pour les matériaux
non-métalliques –
Partie 409: Essais divers – Essai de perte de masse des enveloppes isolantes
et gaines thermoplastiques

IEC 60811-409:2012

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---------------------- Page: 2 ----------------------
IEC 60811-409

®


Edition 1.0 2012-03




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Electric and optical fibre cables – Test methods for non-metallic materials –

Part 409: Miscellaneous tests – Loss of mass test for thermoplastic insulations

and sheaths




Câbles électriques et à fibres optiques – Méthodes d’essai pour les matériaux

non-métalliques –


Partie 409: Essais divers – Essai de perte de masse des enveloppes isolantes

et gaines thermoplastiques












INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX M


ICS 29.035.01; 29.060.20 ISBN 978-2-88912-969-0



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – 60811-409  IEC:2012
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Loss of mass test for insulation . 6
4.1 General . 6
4.2 Test equipment . 6
4.3 Sample and test pieces preparation. 7
4.4 Test procedure . 7
4.5 Measurements . 8
4.6 Expression of results . 8
5 Test report. 8
6 Loss of mass test for sheaths . 8
6.1 General . 8
6.2 Test equipment . 8
6.3 Sample and test pieces preparation. 8
6.4 Test procedure . 8
6.5 Measurements . 8
6.6 Expression of results . 9
7 Test report. 9
Annex A (normative) Calculation of the evaporation area . 10
Bibliography . 13

Figure A.1 – Dumb-bell test piece . 11
Figure A.2 – Small dumb-bell test piece . 11
Figure A.3 – Measurement of insulation thickness (stranded conductor) . 12
Figure A.4 – Measurement of thickness (uneven outer circular profile) . 12
Figure A.5 – Measurement of sheath thickness (irregular inner circular profile) . 12

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60811-409  IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ELECTRIC AND OPTICAL FIBRE CABLES –
TEST METHODS FOR NON-METALLIC MATERIALS –

Part 409: Miscellaneous tests –
Loss of mass test for thermoplastic insulations and sheaths


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
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6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 60811-409 has been prepared by IEC technical committee 20:
Electric cables.
This Part 409 of IEC 60811 cancels and replaces Clause 8 of IEC 60811-3-2:1985, which is
withdrawn. Full details of the replacements are shown in Annex A of IEC 60811-100:2012.
There are no specific technical changes with respect to the previous edition, but see the
Foreword to IEC 60811-100:2012.

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– 4 – 60811-409  IEC:2012
The text of this standard is based on the following documents:
FDIS Report on voting
20/1293/FDIS 20/1342/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.
This part of IEC 60811 shall be used in conjunction with IEC 60811-100.
A list of all the parts in the IEC 60811 series, published under the general title Electric and
optical fibre cables – Test methods for non-metallic materials, can be found on the IEC
website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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60811-409  IEC:2012 – 5 –
INTRODUCTION
The IEC 60811 series specifies the test methods to be used for testing non-metallic materials
of all types of cables. These test methods are intended to be referenced in standards for
cable construction and for cable materials.
NOTE 1 Non-metallic materials are typically used for insulating, sheathing, bedding, filling or taping within cables.
NOTE 2 These test methods are accepted as basic and fundamental and have been developed and used over
many years principally for the materials in all energy cables. They have also been widely accepted and used for
other cables, in particular optical fibre cables, communication and control cables and cables for ships and offshore
applications.

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– 6 – 60811-409  IEC:2012
ELECTRIC AND OPTICAL FIBRE CABLES –
TEST METHODS FOR NON-METALLIC MATERIALS –

Part 409: Miscellaneous tests –
Loss of mass test for thermoplastic insulations and sheaths



1 Scope
This Part 409 of IEC 60811 gives the procedure for measuring the loss of mass which
normally applies to PVC insulations and sheaths.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60811-100:2012, Electric and optical fibre cables – Test methods for non-metallic
materials – Part 100: General
IEC 60811-201:2012, Electric and optical fibre cables – Test methods for non-metallic
materials – Part 201: General tests – Measurement of insulation thickness
IEC 60811-202:2012, Electric and optical fibre cables – Test methods for non-metallic
materials – Part 202: General tests – Measurement of thickness of non-metallic sheath
IEC 60811-401:2012, Electric and optical fibre cables – Test methods for non-metallic
materials – Part 401: Miscellaneous tests – Thermal ageing methods – Ageing in an air oven
IEC 60811-501:2012, Electric and optical fibre cables – Test methods for non-metallic
materials – Part 501: Mechanical tests – Tests for determining the mechanical properties of
insulation and sheathing compounds
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60811-100 apply.
4 Loss of mass test for insulation
4.1 General
This part of IEC 60811 shall be used in conjunction with IEC 60811-100
Unless otherwise specified, all test procedures, except the period in the ageing oven, shall be
carried out at room temperature.
4.2 Test equipment
The test equipment shall consist of:

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60811-409  IEC:2012 – 7 –
a) An oven with natural air flow or air flow by pressure. The air shall enter the oven in such a
way that it flows over the surface of the test pieces and leaves near the top of the oven.
The oven shall have not less than 8 and not more than 20 complete air changes per hour
at the specified ageing temperature, as described in 4.2.1 of IEC 60811-401:2012. In case
of dispute, an oven with natural air circulation shall be used.
A rotating fan shall not be used inside the oven.
b) An analytical balance with a sensitivity of 0,1 mg.
c) Punching dies for dumb-bell test pieces, according to 4.2.3 b) of IEC 60811-501:2012.
d) A desiccator with silica gel or similar material.
4.3 Sample and test pieces preparation
If the loss of mass test is combined (see 4.1 d) of IEC 60811-401:2012) with the mechanical
test (4.2. of IEC 60811-501: 2012), the test pieces shall be three of those subjected to the
ageing in the air oven specified in 4.2.3.1 of IEC 60811-401:2012, one from each core
sample.
Alternatively, three of the other test pieces prepared from each core in accordance with 4.2 of
IEC 60811-501: 2012, may be used, if they are not required for other purposes and if their
thickness complies with item c) below.
Otherwise, three samples, each about 100 mm long, of each core or the insulation from each
core to be tested shall be taken, and a test piece prepared from each one in the same way as
specified below.
a) Any coverings shall be removed. The conductor shall be removed and semi-conducting
layers on the insulation, if any, shall be removed mechanically, i.e. without using solvent.
b) The test shall be made on
1) dumb-bell test pieces illustrated in Figure A.1, whenever practicable,
2) dumb-bell test pieces illustrated in Figure A.2, if the core dimensions are too small to
permit dumb-bells according to Figure A.1 to be used,
3) tubular test pieces, as an alternative to dumb-bells, for inner diameters not exceeding
12,5 mm, provided that there is not an adherent semi-conducting layer on the inside of
the insulation and that any remaining separator shall be removed in a suitable way but
without using solvent.
The ends of tubular test pieces shall not be closed.
c) Dumb-bell test pieces shall be prepared as specified in 4.2.3 b) of IEC 60811-501:2012,
except that the test pieces shall have two parallel surfaces over the whole length, their
thickness shall be (1,0 ± 0,2) mm, and marker lines are not required.
d) Tubular test pieces shall be prepared as specified in 4.2.3 c) of IEC 60811-501:2012,
without applying marker lines. The total surface area A of each test piece (see Annex A)
2
shall be not less than 5 cm .
e) Flat twin flexible cables provided with a groove on both sides between the cores shall be
tested without separation of the cores. For calculation of its surface of evaporation, the
twin cable may be considered as being two separated tubular pieces.
The surface area, A, in square centimetres, of each test piece shall be determined before
conducting the loss of mass test using the formulae as described in Annex A.
4.4 Test procedure
a) The prepared test pieces shall be placed for at least 20 h at ambient temperature in a
desiccator. Immediately after removal from the desiccator, each test piece shall be
weighed accurately, in milligrams, to one decimal place.

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– 8 – 60811-409  IEC:2012
b) Thereafter, the three test pieces shall be maintained in the oven (see 4.2), in air at
atmospheric pressure for 7 × 24 h at (80 ± 2) °C, unless otherwise specified, under the
following conditions:
– compounds of obviously different compositions shall not be tested at the same time in
the same oven;
– test pieces shall be suspended vertically in the middle of the oven so that each piece
is at least 20 mm from any other piece;
– not more than 0,5 % of the oven volume shall be occupied by the test pieces.
c) After this heat treatment, the test pieces shall again be placed for 20 h in a desiccator at
ambient temperature.
4.5 Measurements
Each test piece shall then be re-weighed accurately, in milligrams, to one decimal place.
The difference between the weights determined before and after treatment, for each test
piece, shall be calculated and rounded off to the nearest milligram to calculate the “weight
difference”.
4.6 Expression of results
The loss of mass of each test piece shall be determined by dividing its “weight difference” in
milligrams, by its surface area (see Annex A) in square centimetres.
The median value of the results for the three test pieces from each core, expressed in
milligrams per square centimetre, shall be taken as the loss of mass of the core.
5 Test report
The test report shall be in accordance with that given in IEC 60811-100.
6 Loss of mass test for sheaths
6.1 General
Unless otherwise specified, all test procedures, except the period in the ageing oven, shall be
carried out at room temperature.
6.2 Test equipment
The test equipment is described in 4.2.
6.3 Sample and test pieces preparation
Three samples of the sheath shall be taken in accordance with 4.3.
All constructional elements arranged under (and, if any, over) the sheath shall be removed,
taking care not to damage the sheath, and the test pieces prepared in accordance with 4.3.
6.4 Test procedure
The test procedure shall be carried out in accordance with 4.4.
6.5 Measurements
The surface of evaporation shall be calculated by the formulae given in Annex A.

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60811-409  IEC:2012 – 9 –
6.6 Expression of results
The expression of results shall be in accordance with that given in 4.6.
7 Test report
The test report shall be in accordance with that given in IEC 60811-100.

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– 10 – 60811-409  IEC:2012
Annex A
(normative)

Calculation of the evaporation area

A.1 Calculation for dumb-bell test piece
A.1.1 Dumb-bell test piece, size as Figure A.1
The evaporation area, A, is calculated according to the following formula:
1256+(180δ)
2
A= cm
100
where δ is the mean thickness of the strips, in millimetres, to two decimal places, determined
as specified in 4.2.4 a) of IEC 60811-501:2012.
A.1.2 Dumb-bell test piece, size as Figure A.2
The evaporation area, A, is calculated according to the following formula:
624+(118δ)
2
A= cm
100
where δ is the mean thickness of the strips, in millimetres, to two decimal places, determined
as specified in 4.2.4 a) of IEC 60811-501:2012.
A.2 Calculation for tubular test piece
A.2.1 Thermoplastic insulation
For tubular test pieces, the evaporation area, A, is calculated according to the following
formula:
Surface A = outer surface + inner surface + cut surface
2π(D−δ)×(+δ)
2
A= cm
100
where
δ is the average thickness of the test piece, in millimetres, to two decimal places if
δ ≤ 0,4 mm, and to one decimal place above this limit;
D is the mean outer diameter of the test piece, in millimetres, to two decimal places if
D ≤2 mm, and to one decimal place above this limit;
 is the length of the test piece, in millimetres, to one decimal place;
both δ and D being measured as specified in the test method in 4.4 of IEC 60811-201:2012
and in 4.4 of IEC 60811-202:2012, on a thin slice cut from the end of each tubular test piece.
The formula may be applied also to a tubular test piece having a cross-section as shown in
Figure A.3.

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60811-409  IEC:2012 – 11 –
A.2.2 Thermoplastic sheath
The surface of evaporation shall be calculated by the formulae given in A.2.1 with the
following modification:
The formula given for tubular test pieces is only applicable in the case of the cross-sections
shown in Figures A.4 and A.5. The inner and outer surfaces of evaporation of sheaths of flat
cables shall be calculated from the dimensions of the cross-section of the sheath. These
dimensions shall be determined in millimetres to two decimal places.
The inner side of flat sheaths, having a wedge-shaped ridge, may be considered as being flat.
Dimensions in millimetres

IEC  260/12

Key
1 marker lines
Figure A.1 – Dumb-bell test piece

Dimensions in millimetres


IEC  261/12
Key
1 marker lines
Figure A.2 – Small dumb-bell test piece

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– 12 – 60811-409  IEC:2012
IEC  262/12


Figure A.3 – Measurement of insulation thickness (stranded conductor)

IEC  263/12


Figure A.4 – Measurement of thickness (uneven outer circular profile)

IEC  264/12


Figure A.5 – Measurement of sheath thickness (irregular inner circular profile)

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60811-409  IEC:2012 – 13 –
Bibliography
IEC 60811-3-2:1985, Common test methods for insulating and sheathing materials of electric
cables – Part 3: Methods specific to PVC compounds – Section Two – Loss of mass test –
Thermal stability test
(withdrawn)

____________

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– 14 – 60811-409  CEI:2012
SOMMAIRE
AVANT-PROPOS . 15
INTRODUCTION . 17
1 Domaine d’application . 18
2 Références normatives . 18
3 Termes et définitions . 18
4 Essai de perte de masse des enveloppes isolantes . 18
4.1 Généralités. 18
4.2 Matériel d’essai . 19
4.3 Echantillon et préparation des éprouvette . 19
4.4 Mode opératoire . 20
4.5 Mesures . 20
4.6 Expression des résultats . 20
5 Rapport d’essai . 20
6 Essai de perte de masse pour les gaines . 20
6.1 Généralités. 20
6.2 Matériel d’essai . 20
6.3 Echantillon et préparation des éprouvettes . 21
6.4 Mode opératoire . 21
6.5 Mesures . 21
6.6 Expression des résultats . 21
7 Rapport d’essai . 21
Annexe A (normative) Calcul de la surface d’évaporation . 22
Bibliographie . 25

Figure A.1 – Eprouvette en forme d’haltère . 23
Figure A.2 – Petite éprouvette en forme d’haltère . 23
Figure A.3 – Mesure de l’épaisseur de l’enveloppe isolante (âme câblée) . 24
Figure A.4 – Mesure de
...