SIST EN 61810-7:2006

Electromechanical elementary relays -- Part 7: Test and measurement procedures

This part of IEC 61810 states the test and measurement procedures for electromechanical elementary relays. It covers basic considerations which are, in general, common to all types of electromechanical elementary relays. Supplementary requirements may be necessitated by specific designs or application. The test and measurement procedures of this standard are described as individual provisions covering a specific requirement. When combining them in a test programme, care must be taken (for example by suitable grouping of tested relays) to ensure that preceding tests do not devalue subsequent ones. Where in this standard the term "specified" is used, this means a prescription in the appropriate documentation for the relay, for example manufacturer's data sheet, test specification, customer detail specification. For application within the IECQ system such prescriptions are contained in the detail specification as defined in Clause A.7 of QC 001001.

Elektromechanische Elementarrelais -- Teil 7: Mess- und Prüfverfahren

Relais élémentaires électromécaniques -- Partie 7: Méthodes d'essai et de mesure

La CEI 61810-7:2006 énonce les procédures d'essai et de mesure pour les relais élémentaires électromécaniques. Elle couvre d'une manière générale tous les types de relais élémentaires électromécaniques. Des exigences complémentaires peuvent être nécessaires pour des conceptions ou des applications particulières. Les procédures d'essai et de mesure selon la présente norme sont décrites sous forme de dispositions individuelles couvrant une exigence spécifique. Pour les combiner avec un programme d'essai, on doit prendre soin (par un regroupement approprié des relais soumis à essai, par exemple) de s'assurer que des essais antérieurs ne dévaluent pas des essais postérieurs. Cette deuxième édition annule et remplace la première édition parue en 1997. Cette deuxième édition constitue une révision technique. Cette nouvelle édition a été révisée dans les buts suivants:
- mettre à jour toutes les références normatives,
- adapter son contenu aux éditions les plus récentes des autres parties de la série de normes de base relatives aux relais (CEI 61810-1 et CEI 61810-2),
- établir la cohérence avec d'autres normes CEI (de la série CEI 60068-2, par exemple),
- améliorer les procédures d'essai et de mesure, s'il y a lieu,
- supprimer les essais qui ne sont plus utilisés dans le cas des relais élémentaires pour application industrielle.

Elektromehanski osnovni releji - 7. del: Preskusni in merilni postopki (IEC 61810-7:2006)

General Information

• Status: Published
• Publication Date: 31-Oct-2006
• ICS: 29.120.70 - Relays
• Technical Committee: ISS EIT.ERE - All-or-nothing electrical relays
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Nov-2006
• Due Date: 01-Nov-2006
• Completion Date: 01-Nov-2006
• Ref Project: EN 61810-7:2006 - Electromechanical elementary relays - Part 7: Test and measurement procedures

Relations

• Replaces: SIST EN 116000-3:2001 - Generic Specification: Electromechanical all-or-nothing relays -- Part 3: Test and measurement procedures
• Effective Date: 01-Nov-2006
• Replaces: SIST EN 116000-3:2001 - Generic Specification: Electromechanical all-or-nothing relays -- Part 3: Test and measurement procedures
• Effective Date: 28-Jan-2023
• Replaces: SIST EN 116000-3:2001 - Generic Specification: Electromechanical all-or-nothing relays -- Part 3: Test and measurement procedures
• Effective Date: 07-Jun-2022

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Electromechanical elementary relays - Part 7: Test and measurement proceduresElektromehanski osnovni releji - 7. del: Preskusni in merilni postopki (IEC 61810-7:2006)Relais élémentaires électromécaniques - Partie 7: Méthodes d'essai et de mesureElektromechanische Elementarrelais - Teil 7: Mess- und PrüfverfahrenTa slovenski standard je istoveten z:EN 61810-7:2006SIST EN 61810-7:2006en29.120.70ICS:SLOVENSKI
STANDARDSIST EN 61810-7:200601-november-2006







EUROPEAN STANDARD EN 61810-7 NORME EUROPÉENNE
EUROPÄISCHE NORM June 2006
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
© 2006 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61810-7:2006 E
ICS 29.120.70
English version
Electromechanical elementary relays
Part 7: Test and measurement procedures (IEC 61810-7:2006)
Relais élémentaires électromécaniques Partie 7: Méthodes d'essai et de mesure (CEI 61810-7:2006)
Elektromechanische Elementarrelais
Teil 7: Mess- und Prüfverfahren
(IEC 61810-7:2006)
This European Standard was approved by CENELEC on 2006-05-01. 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, 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.



EN 61810-7:2006
- 2 -
Foreword The text of document 94/226/FDIS, future edition 2 of IEC 61810-7, prepared by IEC TC 94, All-or-nothing electrical relays, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61810-7 on 2006-05-01. 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)
2007-02-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow)
2009-05-01 Annex ZA has been added by CENELEC. __________ Endorsement notice The text of the International Standard IEC 61810-7:2006 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 60479 NOTE
Harmonized in EN 60749 series (not modified). IEC 60947-5-1 NOTE
Harmonized as EN 60947-5-1:2004 (not modified). IEC 61810-2 NOTE
Harmonized as EN 61810-2:2005 (not modified).
__________



- 3 - EN 61810-7:2006
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
IEC 60068-2-1 + A1 + A2 1990 1993 1994 Environmental testing
Part 2: Tests - Tests A: Cold EN 60068-2-1 + A1 + A2 1993 1993 1994
IEC 60068-2-2 + A1 + A2 1974 1993 1994 Environmental testing Part 2: Tests - Tests B: Dry heat EN 60068-2-2 + A1 + A2
1993 1993 1994
IEC 60068-2-6 + corr. March
1995 1995 Environmental testing
Part 2: Tests - Test Fc: Vibration (sinusoidal) EN 60068-2-6 1995
IEC 60068-2-7 + A1 1983 1986 Environmental testing.
Part 2: Tests. Test Ga: Acceleration, steady state
EN 60068-2-7
1993
IEC 60068-2-10 2005 Environmental testing
Part 2-10: Tests -Test J and guidance: Mould growth EN 60068-2-10 2005
IEC 60068-2-11 + corr. December
1981 1999 Environmental testing
Part 2: Tests - Test Ka: Salt mist EN 60068-2-11 1999
IEC 60068-2-13 1983 Environmental testing
Part 2: Tests - Test M: Low air pressure EN 60068-2-13 1999
IEC 60068-2-14 + A1 1984 1986 Environmental testing
Part 2: Tests - Test N: Change of temperature EN 60068-2-14
1999
IEC 60068-2-17 1994 Environmental testing
Part 2: Tests - Test Q: Sealing EN 60068-2-17 1994
IEC 60068-2-20 + A2 1979 1987 Environmental testing Part 2: Tests - Test T: Soldering
HD 323.2.20 S3
1988
IEC 60068-2-21 1999 Environmental testing
Part 2-21: Tests - Test U: Robustness of terminations and integral mounting devices EN 60068-2-21 1999
IEC 60068-2-27 1987 Environmental testing Part 2: Tests - Test Ea and guidance: Shock EN 60068-2-27 1993
IEC 60068-2-29 1987 Environmental testing Part 2: Tests - Test Eb and guidance: Bump EN 60068-2-29 1993
IEC 60068-2-30 2005 Environmental testing
Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle) EN 60068-2-30 2005



EN 61810-7:2006
- 4 - Publication Year Title EN/HD Year IEC 60068-2-42 2003 Environmental testing
Part 2-42: Tests - Test Kc: Sulphur dioxide test for contacts and connections EN 60068-2-42 2003
IEC 60068-2-43 2003 Environmental testing
Part 2-43: Tests -Test Kd: Hydrogen sulphide test for contacts and connections EN 60068-2-43 2003
IEC 60068-2-45 + A1 1980 1993 Environmental testing Part 2: Tests - Test Xa and guidance: Immersion in cleaning solvents EN 60068-2-45 + A1 1992 1993
IEC 60068-2-58 2004 Environmental testing Part 2-58: Tests - Test Td: Test methods for solderability, resistance to dissolution of metallization and to soldering heat of surface mounting devices (SMD) EN 60068-2-58 + corr. December
2004 2004
IEC 60068-2-64 + corr. October
1993 1993 Environmental testing
Part 2: Test methods - Test Fh: Vibration, broad-band random (digital control) and guidance EN 60068-2-64 1994
IEC 60068-2-68 1994 Environmental testing
Part 2: Tests - Test L: Dust and sand EN 60068-2-68 1996
IEC 60068-2-78 2001 Environmental testing
Part 2-78: Tests - Test Cab: Damp heat, steady state EN 60068-2-78 2001
IEC 60512-7 1993 Electromechanical components for electronic equipment - Basic testing procedures and measuring methods
Part 7: Mechanical operating tests and sealing tests - -
IEC 60695-2 Series Fire hazard testing
Part 2: Test methods
EN 60695-2 Series
IEC 60695-2-10 2000 Fire hazard testing
Part 2-10: Glowing/hot-wire based test methods - Glow-wire apparatus and common test procedure EN 60695-2-10 2001
IEC 60695-2-11 + corr. January
2000 2001 Fire hazard testing
Part 2-11: Glowing/hot-wire based test methods - Glow-wire flammability test method for end-products EN 60695-2-11 2001
IEC 60695-2-12 2000 Fire hazard testing
Part 2-12: Glowing/hot-wire based test methods - Glow-wire flammability test method for materials EN 60695-2-12 2001
IEC 60695-2-13 2000 Fire hazard testing
Part 2-13: Glowing/hot-wire based test methods - Glow-wire ignitability test method for materials EN 60695-2-13 2001



- 5 - EN 61810-7:2006 Publication Year Title EN/HD Year IEC 60695-11-5 2004 Fire hazard testing
Part 11-5: Test flames - Needle-flame test method - Apparatus, confirmatory test arrangement and guidance EN 60695-11-5 2005
IEC 60999-1 1999 Connecting devices - Electrical copper conductors - Safety requirements for screw-type and screwless-type clamping units
Part 1: General requirements and particular requirements for clamping units for conductors from 0,2 mm² up to 35 mm² (included) EN 60999-1 2000
IEC 61210 (mod) 1993 Connecting devices - Flat quick-connect terminations for electrical copper conductors -Safety requirements EN 61210 1995
IEC 61180-1 1992 High-voltage test techniques for low-voltage equipment
Part 1: Definitions, test and procedure requirements EN 61180-1 1994
IEC 61180-2 1994 High-voltage test techniques for low-voltage equipment
Part 2: Test equipment EN 61180-2 1994
IEC 61672-1 2002 Electroacoustics - Sound level meters
Part 1: Specifications EN 61672-1 2003
IEC 61810-1 + corr. October
2003 2004 Electromechanical elementary relays
Part 1: General and safety requirements EN 61810-1 2004
IEC QC 001001 2000 IEC Quality Assessment System for Electronic Components (IECQ) - Basic rules - -







INTERNATIONAL STANDARD IEC61810-7 Second edition2006-03 Electromechanical elementary relays – Part 7: Test and measurement procedures
 IEC 2006

Copyright - all rights reserved 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 the publisher. International Electrotechnical Commission,
3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: [phone] Telefax: [phone] E-mail: [e-mail]
Web: www.iec.ch XC For price, see current cataloguePRICE CODE
Commission Electrotechnique InternationaleInternational Electrotechnical Commission



– 2 – 61810-7  IEC:2006(E)
CONTENTS FOREWORD.5
1 Scope.7 2 Normative references.7 3 Terms and definitions.9 4 Test and measurement procedures.18 4.1 General.18 4.2 Deviations.18 4.3 Precision of measurement.18 4.4 Power supplies.18 4.5 Reference conditions for testing.19 4.6 Visual inspection and check of dimensions.20 4.7 Mechanical tests and weighing.20 4.8 Relay coil properties.21 4.9 Dielectric strength test.25 4.10 Impulse voltage test.26 4.11 Insulation resistance.27 4.12 Contact-circuit resistance (or voltage drop).28 4.13 Functional tests.29 4.14 Timing tests.35 4.15 Climatic tests/sequence.38 4.16 Damp heat, steady state.40 4.17 Thermal resistance of the coil.41 4.18 Heating.42 4.19 Rapid change of temperature.44 4.20 Enclosure.44 4.21 Internal moisture.46 4.22 Corrosive atmospheres.46 4.23 Mould growth.47 4.24 Robustness of terminals.48 4.25 Soldering.48 4.26 Shock.49 4.27 Bump.50 4.28 Vibration.51 4.29 Acceleration.52 4.30 Electrical endurance.53 4.31 Mechanical endurance.56 4.32 Thermal endurance.56 4.33 Limiting continuous current.57 4.34 Overload (contact circuit).57 4.35 Load transfer.58 4.36 Electromagnetic compatibility.59 4.37 Magnetic interference.60 4.38 Crosstalk and insertion loss.61 4.39 Electrical contact noise.61



61810-7  IEC:2006(E) – 3 –
4.40 Thermoelectric e.m.f.62 4.41 Capacitance.62 4.42 Contact sticking (delayed release).63 4.43 Magnetic remanence.63 4.44 Acoustic noise.65 4.45 Continuity of protective earth connection.66 4.46 Fluid contamination.66 4.47 Resistance to cleaning solvents.67 4.48 Fire hazard.68 4.49 Temperature rise at rated load.68 4.50 Mechanical interlock.69 4.51 Insertion and withdrawal force (mating relay and socket).69
Annex A (normative)
Heating test arrangement.71 Annex B (normative)
Fire hazard testing.72 Annex C (normative)
Test circuit for endurance tests.77 Annex D (informative)
Inductive contact loads.84
Bibliography.86
Figure 1 – Typical circuit for the measurement of coil transient suppression.23 Figure 2 – Typical traces on an oscilloscope screen
during transient voltage measurement.24 Figure 3 – Monostable non-polarized relay.30 Figure 4 – Monostable relay polarized by diode.31 Figure 5 – Monostable polarized relay with magnetic biasing.32 Figure 6 – Bistable non-polarized relay (not applicable to remanence relays).33 Figure 7 – Bistable polarized relay (example).34 Figure 8 – Typical circuit for the measurement of time parameters.36 Figure 9 – Typical traces on an oscilloscope screen during time measurements.37 Figure 10 – Test circuit for load transfer.59 Figure 11 – Mounting array for adjacent similar relays.60 Figure 12 – Directions of the test current for magnetic interference test, method 3.61 Figure 13 – Sequential diagram for magnetic remanence test.64 Figure 14 – Installation for the test for acoustic noise emission.65 Figure A.1 – Test arrangement.71 Figure B.1 – Glow-wire and position of the thermocouple.73 Figure B.2 – Glow-wire test apparatus (example).74 Figure B.3 – Needle flame test details.76 Figure C.1 – Standard test circuit.77 Figure C.2 – Functional block diagram.78 Figure C.3 – Circuit for cable load.80 Figure C.4 – Test circuit for inrush current loads (for example capacitive loads and
simulated tungsten filament lamp loads) – a.c. circuits.81



– 4 – 61810-7  IEC:2006(E)
Figure C.5 – Example for a tungsten filament lamp test for relays rated 10/100 A/250 V~/ 2,5 ms.82 Figure C.6 – Test circuit for inrush current loads (for example capacitive loads and
simulated lamp loads) – d.c. circuits.82 Figure C.7 – Test circuit for inrush current loads (for example simulated fluorescent lamp loads) with power-factor correction.83
Table 1 – Coil voltage values and corresponding functions.29 Table 2 – Cross-sectional areas and lengths of conductors
dependent on the current carried by the terminal.43 Table 3 – Schematics for contact loading.55 Table 4 – Test fluids and temperatures of tests.67 Table C.1 – Characteristics of power sources for contact loads.78 Table C.2 – Standard contact load characteristics.79 Table D.1 – Verification of the making and breaking capacity for AC-15/DC-13
(normal conditions).84 Table D.2 – Making and breaking capacity for electrical endurance test.85



61810-7  IEC:2006(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
ELECTROMECHANICAL ELEMENTARY RELAYS –
Part 7: Test and measurement procedures
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 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. International Standard IEC 61810-7 has been prepared by IEC technical committee 94: All-or-nothing electrical relays. This second edition cancels and replaces the first edition published in 1997. This second edition constitutes a technical revision. This new edition has been revised in order to – update all normative references, – adapt its contents to the newest issues of the other parts of this series of basic relay standards (IEC 61810-1 and IEC 61810-2), – establish coherence with other IEC standards (for example of the IEC 60068-2 series), – improve test and measurement procedures where appropriate, – delete those tests no longer used in case of elementary relays for industrial application.



– 6 – 61810-7  IEC:2006(E)
The text of this standard is based on the following documents: FDIS Report on voting 94/226/FDIS 94/231/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. IEC 61810 consists of the following parts, under the general title Electromechanical elementary relays: Part 1: General and safety requirements Part 2: Reliability Part 7: Test and measurement procedures The committee has decided that the contents of this publication will remain unchanged until the maintenance result 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.
A bilingual version of this publication may be issued at a later date.



61810-7  IEC:2006(E) – 7 –
ELECTROMECHANICAL ELEMENTARY RELAYS –
Part 7: Test and measurement procedures
1 Scope This part of IEC 61810 states the test and measurement procedures for electromechanical elementary relays. It covers basic considerations which are, in general, common to all types of electromechanical elementary relays. Supplementary requirements may be necessitated by specific designs or application. The test and measurement procedures of this standard are described as individual provisions covering a specific requirement. When combining them in a test programme, care must be taken (for example by suitable grouping of tested relays) to ensure that preceding tests do not devalue subsequent ones.
Where in this standard the term “specified” is used, this means a prescription in the appropriate documentation for the relay, for example manufacturer’s data sheet, test specification, customer detail specification. For application within the IECQ system such prescriptions are contained in the detail specification as defined in Clause A.7 of QC 001001. NOTE 1 To improve the readability of this standard, the term “relay” is generally used in place of “electromechanical elementary relay”. NOTE 2 Requirements and tests related to the type testing of electromechanical elementary relays are contained in IEC 61810-1. For that purpose, the generally described test and measurement procedures of this standard have been prescribed in a more restricted and stringent form in IEC 61810-1. NOTE 3 Standards covering relays subjected to quality assessment in accordance with IECQ are compiled in the IEC 61811 series of publications. 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. IEC 60068-2-1:1990, Environmental testing – Part 2: Tests – Tests A: Cold
Amendment 1 (1993)
Amendment 2 (1994) IEC 60068-2-2:1974, Environmental testing – Part 2: Tests – Tests B: Dry heat
Amendment 1 (1993)
Amendment 2 (1994) IEC 60068-2-6:1995, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal) IEC 60068-2-7:1983, Environmental testing – Part 2: Tests – Test Ga: Acceleration, steady state
Amendment 1 (1986) IEC 60068-2-10:2005, Environmental testing – Part 2: Tests – Test J and guidance: Mould growth IEC 60068-2-11:1981, Environmental testing – Part 2: Tests – Test Ka: Salt mist



– 8 – 61810-7  IEC:2006(E)
IEC 60068-2-13:1983, Environmental testing – Part 2: Tests – Test M: Low air pressure IEC 60068-2-14:1984, Environmental testing – Part 2: Tests – Test N: Change of temperature
Amendment 1 (1986) IEC 60068-2-17:1994, Environmental testing – Part 2: Tests – Test Q: Sealing IEC 60068-2-20:1979, Environmental testing – Part 2: Tests – Test T: Soldering
Amendment 2 (1987) IEC 60068-2-21:1999, Environmental testing – Part 2-21: Tests – Test U: Robustness of terminations and integral mounting devices IEC 60068-2-27:1987, Environmental testing – Part 2: Tests – Test Ea and guidance: Shock IEC 60068-2-29:1987, Environmental testing – Part 2: Tests – Test Eb and guidance: Bump
IEC 60068-2-30:2005, Environmental testing – Part 2: Tests – Test Db: Damp heat, cyclic (12 + 12-hour cycle)
IEC 60068-2-42:2003, Environmental testing – Part 2-42: Tests – Test Kc: Sulphur dioxide test for conta
...