Environmental testing - Part 2-11: Tests - Test Ka: Salt mist

IEC 60068-2-11:2021 specifies a test method for assessing the corrosion resistance of electrotechnical products components, equipment and materials in a salt mist environment. Its objective is to verify that the comparative quality of a metallic material, with or without corrosion protection, is maintained when exposed to salt mist.
This test method is useful for evaluating the quality and the uniformity of coatings applied to protect metals against corrosion. It is particularly useful for detecting discontinuities, such as pores and other defects, in certain metallic, organic, anodic oxide and conversion coatings.
This fourth edition cancels and replaces the third edition published in 1981. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the preparation of the salt solution has been modified;
b) the temperature of the solution for measuring pH has been modified;
c) the atomizing pressure and water temperature of the saturation tower have been added and are given in Table 1;
d) test report details have been modified;
e) examples of typical test apparatus have been added and are given in Annex A;
f) a method for evaluating corrosivity of the apparatus has been added and is given in Annex B;
g) a bibliography has been added.

Essais d’environnement - Partie 2-11: Essais - Essai Ka: Brouillard salin

L'IEC 60068-2-11:2021 spécifie une méthode d'évaluation de la résistance des composants, équipements et matériaux des produits électrotechniques à la corrosion dans un environnement de brouillard salin. Il s'agit de vérifier que la qualité comparative d'un matériau métallique, avec ou sans protection contre la corrosion, est maintenue dans un brouillard salin.
Cette méthode d'essai est utile pour évaluer la qualité et l'uniformité des revêtements appliqués afin de protéger les métaux contre la corrosion. Elle est particulièrement utile pour détecter les discontinuités (pores et autres défauts, par exemple) dans certains revêtements métalliques, organiques, d'oxyde anodique et de conversion.
Cette quatrième édition annule et remplace la troisième édition parue en 1981. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) la préparation de la solution saline a été modifiée;
b) la température de la solution de mesure du pH a été modifiée;
c) la pression d'injection et la température de l'eau de la colonne de saturation ont été ajoutées et sont données dans le Tableau 1;
d) les détails du rapport d'essai ont été modifiés;
e) les figures représentant l'appareillage d'essai type ont été ajoutées et sont données à l’Annexe A;
f) la méthode d'évaluation de la corrosivité de l'appareillage a été ajoutée et est donnée à l’Annexe B;
g) la bibliographie a été ajoutée.

General Information

Status
Published
Publication Date
02-Mar-2021
Current Stage
PPUB - Publication issued
Completion Date
03-Mar-2021
Ref Project

Buy Standard

Standard
IEC 60068-2-11:2021 - Environmental testing - Part 2-11: Tests - Test Ka: Salt mist
English and French language
33 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 60068-2-11
Edition 4.0 2021-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 2-11: Tests – Test Ka: Salt mist
Essais d’environnement –
Partie 2-11: Essais – Essai Ka: Brouillard salin
IEC 60068-2-11:2021-03(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2021 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC

copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite

ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez

les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch

The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the

variety of criteria (reference number, text, technical publications previews. With a subscription you will always

committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.

and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des

Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.
Recherche de publications IEC - IEC online collection - oc.iec.ch

webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez

La recherche avancée permet de trouver des publications IEC gratuitement tous les aperçus des publications. Avec un

en utilisant différents critères (numéro de référence, texte, abonnement, vous aurez toujours accès à un contenu à jour

comité d’études, …). Elle donne aussi des informations sur adapté à vos besoins.
les projets et les publications remplacées ou retirées.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
Le premier dictionnaire d'électrotechnologie en ligne au
Restez informé sur les nouvelles publications IEC. Just
monde, avec plus de 22 000 articles terminologiques en
Published détaille les nouvelles publications parues.
anglais et en français, ainsi que les termes équivalents dans
Disponible en ligne et une fois par mois par email.
16 langues additionnelles. Egalement appelé Vocabulaire
Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC 60068-2-11
Edition 4.0 2021-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 2-11: Tests – Test Ka: Salt mist
Essais d’environnement –
Partie 2-11: Essais – Essai Ka: Brouillard salin
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040 ISBN 978-2-8322-9476-5

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
---------------------- Page: 3 ----------------------
– 2 – IEC 60068-2-11:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 General ........................................................................................................................... 6

5 Salt solution .................................................................................................................... 7

5.1 Preparation of salt solution ..................................................................................... 7

5.2 pH adjustment ......................................................................................................... 7

5.3 Filtration ................................................................................................................. 7

5.4 Re-use .................................................................................................................... 7

6 Test apparatus ................................................................................................................ 7

6.1 Test chamber .......................................................................................................... 7

6.2 Atomizer(s) ............................................................................................................. 8

6.3 Air supply ................................................................................................................ 8

6.4 Collecting devices ................................................................................................... 9

6.5 Method for evaluating chamber corrosivity .............................................................. 9

7 Test specimens ............................................................................................................... 9

8 Initial measurements ....................................................................................................... 9

9 Pre-conditioning .............................................................................................................. 9

10 Arrangement of the test specimens .................................................................................. 9

11 Operating conditions ...................................................................................................... 10

12 Duration of test .............................................................................................................. 11

13 Recovery (at the end of testing) ..................................................................................... 11

14 Final measurements ...................................................................................................... 11

15 Information to be given in the relevant specification ....................................................... 11

16 Test report ..................................................................................................................... 12

Annex A (informative) Examples of test apparatus for salt mist test ..................................... 13

Annex B (informative) Method for evaluating corrosivity of the apparatus ............................. 15

B.1 General ................................................................................................................. 15

B.2 Reference specimens ........................................................................................... 15

B.3 Arrangement of the reference specimens .............................................................. 15

B.4 Duration of test ..................................................................................................... 16

B.5 Determination of mass loss (mass per area) ......................................................... 16

B.6 Satisfactory performance of apparatus .................................................................. 16

Bibliography .......................................................................................................................... 17

Figure A.1 – Example of test apparatus for salt mist test ....................................................... 13

Figure A.2 – Example of test apparatus for salt mist test ....................................................... 14

Table 1 – Suggested values for the temperature of the hot water in the saturation tower ........ 8

Table 2 – Operating conditions ............................................................................................. 10

---------------------- Page: 4 ----------------------
IEC 60068-2-11:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 2-11: Tests – Test Ka: Salt mist
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

services carried out by independent certification bodies.

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

members of its technical committees and IEC National Committees for any personal injury, property damage or

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.

IEC 60068-2-11 has been prepared by IEC technical committee 104: Environmental conditions,

classification and methods of test. It is an International Standard.

This fourth edition cancels and replaces the third edition published in 1981. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) the preparation of the salt solution has been modified;
b) the temperature of the solution for measuring pH has been modified;

c) the atomizing pressure and water temperature of the saturation tower have been added

and are given in Table 1;
d) test report details have been modified;
e) examples of typical test apparatus have been added and are given in Annex A;
---------------------- Page: 5 ----------------------
– 4 – IEC 60068-2-11:2021 © IEC 2021

f) a method for evaluating corrosivity of the apparatus has been added and is given in

Annex B;
g) a bibliography has been added.
The text of this International Standard is based on the following documents:
Draft Report on voting
104/888/FDIS 104/892/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,

available at www.iec.ch/members_experts/refdocs. The main document types developed by

IEC are described in greater detail at www.iec.ch/standardsdev/publications.

A list of all parts in the IEC 60068 series, published under the general title Environmental

testing, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 60068-2-11:2021 © IEC 2021 – 5 –
INTRODUCTION

The object of the test specified in this document is to compare the resistance of

electrotechnical equipment to deterioration from salt mist.
It is useful for evaluating the quality and uniformity of protective coatings.

The relationship between the deterioration provided by this test and long-term exposure of

electrotechnical equipment to salt laden atmospheres cannot be readily determined.

Consequently, the test cannot be reliably used to quantify the long-term aging of

electrotechnical equipment. However, as the test commonly accelerates deterioration from

salt mist, it does provide a useful means of comparing resistance of electrotechnical

equipment to deterioration from salt laden atmospheres.
---------------------- Page: 7 ----------------------
– 6 – IEC 60068-2-11:2021 © IEC 2021
ENVIRONMENTAL TESTING –
Part 2-11: Tests – Test Ka: Salt mist
1 Scope

This part of IEC 60068 specifies a test method for assessing the corrosion resistance of

electrotechnical products components, equipment and materials in a salt mist environment. Its

objective is to verify that the comparative quality of a metallic material, with or without

corrosion protection, is maintained when exposed to salt mist.

This test method is useful for evaluating the quality and the uniformity of coatings applied to

protect metals against corrosion. It is particularly useful for detecting discontinuities, such as

pores and other defects, in certain metallic, organic, anodic oxide and conversion coatings.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements 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.
IEC 60068-1, Environmental testing – Part 1: General and guidance
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 General

WARNING – This document can involve hazardous materials, operations and equipment. This

document does not purport to address all of the safety concerns, if any, associated with its

use. It is the responsibility of the user of this document to establish appropriate safety and

health practices and determine the applicability of regulatory limitations prior to use.

For equipment and components, Test Kb (IEC 60068-2-52) is considered to provide more

realistic conditions and to provide means of assessment of individual items. If, however, for

particular circumstances, the relevant specification requires this test (Ka) to be applied to

individual specimens for qualification purposes, then the specimens should be tested as part

of the overall assembly or equipment in which they are to be used and be completed with any

protection devices (cases, covers, shields, etc.), as in practice.
NOTE 1 "Salt mist" is also called "salt spray".
NOTE 2 The test specimen(s) is typically not energized during the test.
---------------------- Page: 8 ----------------------
IEC 60068-2-11:2021 © IEC 2021 – 7 –
5 Salt solution
5.1 Preparation of salt solution

Dissolve a sufficient mass of sodium chloride in distilled or deionized water with a conductivity

not higher than 20 µS/cm at 25 °C ± 2 K to produce a concentration of 50 g/l ± 5 g/l. The

sodium chloride concentration of the sprayed solution collected shall be 50 g/l ± 5 g/l. The

specific gravity range for a 50 g/l ± 5 g/l solution is 1,029 to 1,036 at 25 °C.

The sodium chloride shall not contain a mass fraction of the heavy metals copper (Cu), nickel

(Ni) and lead (Pb) in total more than 0,005 %. It shall not contain a mass fraction of sodium

iodide more than 0,1 % and a mass fraction of total impurities more than 0,5 %, calculated for

dry salt.

NOTE Sodium chloride with anti-caking agents can act as corrosion inhibitors or accelerators. A useful sodium

chloride salt grade is a grade named Ph. Eur/USP or JIS, ACS.
5.2 pH adjustment

If necessary, adjust the pH of the salt solution so that the pH of the sprayed solution collected

within the test chamber is 6,5 to 7,2 at 25 °C ± 2 K. Check the pH using electrometric

measurement. Measurements of pH shall be done using electrodes suitable for measuring in

weakly buffered sodium chloride solution in deionized water.

Make any necessary corrections by adding hydrochloric acid, sodium hydroxide or sodium

bicarbonate solution of analytical grade.

WARNING – Hydrochloric acid (CAS no. 7647-01-0) solution is toxic, corrosive, irritating and

very toxic to aquatic life. Handling of hydrochloric acid solution shall be restricted to skilled

personnel or conducted under their control. Care shall be taken in the disposal of this solution.

WARNING – Sodium hydroxide (CAS no. 1310-73-2) solution is toxic, corrosive and irritating.

Handling of sodium hydroxide solution shall be restricted to skilled personnel or conducted

under their control. Care shall be taken in the disposal of this solution.

NOTE Possible changes in pH can result from loss of carbon dioxide in the solution when it is sprayed. Such

changes can be avoided by reducing the carbon dioxide content of the solution by, for example, heating it to a

temperature above 35 °C before it is placed in the apparatus, or by making the solution using freshly boiled water.

The pH shall be measured when preparing each new batch of solution.
5.3 Filtration

If necessary, filter the solution before placing it in the reservoir of the apparatus, to remove

any solid matter which might block the apertures of the spraying device.
5.4 Re-use
The sprayed solution shall not be re-used.
6 Test apparatus
6.1 Test chamber

The chamber for this test shall be constructed of such materials that will not influence the

corrosive effects of the salt mist.
---------------------- Page: 9 ----------------------
– 8 – IEC 60068-2-11:2021 © IEC 2021

The detailed construction of the chamber, including the method of producing the mist, is

provided as follows:

a) The operating conditions in the chamber shall be within the limits specified (see

Clause 11).

b) The chamber shall have sufficient volume and performance that the introduction of test

specimens will not detrimentally affect the control of the conditions.

c) The solution shall not be sprayed directly onto test specimens but rather spread

throughout the test chamber so that it falls naturally down to them.

d) The upper parts of the chamber shall be designed so that drops of sprayed solution

formed on its surface do not fall on the test specimens being tested.

e) The chamber shall be properly vented to prevent pressure build-up and allow uniform

distribution of salt mist. The discharge end of the vent shall be protected from strong air

currents which can have a negative effect to the air flow.

f) The test temperature shall be measured at least 100 mm from walls and radiant heat

sources.

NOTE Examples of test apparatus are shown in Annex A (see Figure A.1 and Figure A.2).

6.2 Atomizer(s)

The atomizer(s) used shall be of such a design and construction as to produce a finely divided,

wet, dense mist. The atomizer(s) shall be made of material that is non-reactive to the salt

solution.
6.3 Air supply

The compressed air entering the atomizer(s) shall be essentially free from all impurities, such

as oil and dust.

Means shall be provided to humidify and warm the compressed air as required to meet the

operating conditions. The atomizing pressure shall be at an overpressure of 70 kPa to

170 kPa. The pressure is typically 98 kPa ± 10 kPa but can vary depending on the type of test

chamber and atomizer used. The appropriate temperature depends on the pressure used and

on the type of atomizer. Temperature, pressure or humidification, or a combination thereof,

shall be adjusted so that the rate of collection of the spray in the chamber and the

concentration of the collected spray are kept within the specified limits (see Clause 11). A

commonly used humidifier is the saturation tower, where temperature and pressure are

controllable. Table 1 gives suggested values on temperature and pressure combinations for

the saturation tower. Distilled or deionized water with a conductivity not higher than 20 μS/cm

at 25 °C ± 2 K shall be used for humidification of spray air.

Table 1 – Suggested values for the temperature of the hot water in the saturation tower

Atomizing overpressure Suggested values for the temperature of the hot water in
the saturation tower when performing the salt mist test
kPa °C
70 45
84 46
98 48
112 49
126 50
140 52
160 53
170 54
---------------------- Page: 10 ----------------------
IEC 60068-2-11:2021 © IEC 2021 – 9 –
6.4 Collecting devices

At least two collecting devices shall be used to check the homogeneity of the spraying of the

chamber. A collecting device shall consist of a collecting funnel which has a diameter of

100 mm ± 2 mm, corresponding to a collecting area of approximately 80 cm . The funnel

should be made of chemically inert material and its stem inserted into a suitable measuring

container.
6.5 Method for evaluating chamber corrosivity

To check the reproducibility of the test results, the corrosivity of the apparatus shall be

verified at regular intervals. A suitable method for evaluating corrosivity of the apparatus by

use of reference specimens is described in Annex B.
7 Test specimens

The number and type of test specimens, their shape and their dimensions shall be selected in

accordance with the relevant specification. When not specified, these parameters shall be

mutually agreed between the interested parties.
8 Initial measurements

The test specimens shall be visually examined and, if necessary, electrically and

mechanically checked as required by the relevant specification.

NOTE Pre-test photographs of condition are useful when deciding if there has been degradation. Alternatively,

retaining a second untested sample is useful for comparison purposes.
9 Pre-conditioning

The relevant specification shall specify the cleaning method to be applied immediately before

the test. It shall also state whether or not to remove any temporary protective coating.

The cleaning method used shall not interfere with the effect of the salt mist on the test

specimen, nor introduce any secondary corrosion. Touching of the test surfaces by hand

should be avoided as far as possible before the test.
10 Arrangement of the test specimens

10.1 The test specimens shall be tested in their normal operating positions in accordance

with the relevant specification.

10.2 The angle at which the surface of the test specimen is exposed in the chamber is very

important. The angle shall be mutually agreed between the interested parties.

Unless otherwise specified, specimens shall be mounted at an angle of 20° ± 5° to the vertical,

with the area of primary interest facing up. This is common practice for testing metallic

specimens and are common measures to protect them from corrosion. When testing

assemblies or enclosures, it can be preferable to mount the specimen at the same angle as in

normal use.
---------------------- Page: 11 ----------------------
– 10 – IEC 60068-2-11:2021 © IEC 2021

10.3 The test specimens shall be arranged so that they do not come into contact with the

chamber and so that surfaces to be tested are exposed to free circulation of spray. The test

specimens may be placed at different levels within the chamber as long as the solution does

not drip from the test specimens or their supports at one level onto other test specimens

placed below. When practical, specimen repositioning at regular intervals during the test is

recommended.

10.4 The supports for the test specimens shall be made of inert non-metallic material. If it is

necessary to suspend test specimens, the material used shall not be metallic but shall be

synthetic fibre, cotton thread or other inert insulating material.
11 Operating conditions
11.1 The operating conditions shall be as specified in Table 2.
Table 2 – Operating conditions
Condition Specified value
Temperature 35 °C ± 2 K
Average collection rate for a horizontal
1,5 ml/h ± 0,5 ml/h
collecting area of 80 cm
Concentration of sodium chloride
50 g/l ± 5 g/l
(collected solution)
pH (collected solution) 6,5 to 7,2

The ± tolerances given are the allowable operational fluctuations, which are defined

as the positive and negative deviations from the setting of the sensor at the

operational control set point during equilibrium conditions. This does not mean that

the set value may vary by plus/minus the amount indicated from the given value.

11.2 Check the collection rate and other test conditions in the test chamber, filled to a

similar extent as during the test. A completely filled chamber often exhibits different

performance than the same chamber operated empty. The trial run for confirming the test

condi
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.