EN 60068-2-40:1999

Environmental testing - Part 2: Tests - Test Z/AM: Combined cold/low air pressure tests

Applies to heat-dissipating and non-heat-dissipating specimens and is a test to determine the ability of components, equipment and other articles to be stored and used under a simultaneous combination of low temperature and low air pressure.

Umweltprüfungen - Teil 2: Prüfungen - Prüfung Z/AM: Kombinierte Prüfung - Kälte/Niedriger Luftdruck

Essais d'environnement - Partie 2: Essais - Essai Z/AM: Essais combinés froid/basse pression atmosphérique

Décrit les essais combinés de froid (avec variation lente de la température) et basse pression atmosphérique, pour les spécimens dissipant de l'énergie d'une part, et ceux ne dissipant pas d'énergie d'autre part. Le but de cet essai est de déterminer l'aptitude des composants, équipements ou autres articles à être stockés et utilisés dans les conditions de basse température et de basse pression atmosphérique, appliquées simultanément.

Environmental testing - Part 2: Tests - Test Z/AM: Combined cold/low air pressure tests

General Information

• Status: Published
• Publication Date: 16-Nov-1999
• ICS: 19.040 - Environmental testing
• Technical Committee: CLC/SR 104 - Environmental conditions, classification and methods of test
• Drafting Committee: IEC/TC 104 - IEC_TC_104
• Parallel Committee: IEC/TC 104 - IEC_TC_104
• Current Stage: 6060 - Document made available - Publishing
• Completion Date: 17-Nov-1999
• Ref Project: SIST EN 60068-2-40:2001 - Environmental testing -- Part 2: Tests - Test Z/AM: Combined cold/low air pressure tests

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60068-2-40:2001
01-september-2001
Environmental testing - Part 2: Tests - Test Z/AM: Combined cold/low air pressure
tests
Environmental testing -- Part 2: Tests - Test Z/AM: Combined cold/low air pressure tests
Umweltprüfungen -- Teil 2: Prüfungen - Prüfung Z/AM: Kombinierte Prüfung -
Kälte/Niedriger Luftdruck
Essais d'environnement -- Partie 2: Essais - Essai Z/AM: Essais combinés froid/basse
pression atmosphérique
Ta slovenski standard je istoveten z: EN 60068-2-40:1999
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
SIST EN 60068-2-40:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60068-2-40:2001

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SIST EN 60068-2-40:2001

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SIST EN 60068-2-40:2001

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SIST EN 60068-2-40:2001
NORME CEI
INTERNATIONALE
IEC



60068-2-40
INTERNATIONAL


Première édition
STANDARD

First edition

1976-01


BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Essais fondamentaux climatiques
et de robustesse mécanique –
Partie 2-40:
Essais – Essai Z/AM: Essais combinés
froid/basse pression atmosphérique

Basic environmental testing procedures
Part 2-40:
Tests – Test Z/AM: Combined cold/low
air pressure tests



CODE PRIX
J
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

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SIST EN 60068-2-40:2001
CONTENTS
Page
FOREWORD 5
PREFACE 5
Clause
1. Introduction
7
1.1 General
7
1.2 Low air pressure
7
1.3 Temperature
7
1.4 Related documents
9
2. Object
9
3. General description
4. Description of test apparatus
9
4.1 Test chamber
4.2 Mounting 9
5. Severities
9
5.1 General
5.2 Preferred combinations of temperature, air pressure and duration 9
11
6. Preconditioning
11
7. Initial measurements
8. Conditioning
11
8.1 General
8.2 Procedure for heat-dissipating specimen without artificial cooling of the specimen and for non-
heat-dissipating specimen 11
8.3 Precautions when testing specimens with artificial cooling 13
13
9. Intermediate measurements
13
10. Recovery
13
11. Final measurements
Information to be given in the relevant specification 13
12.
FIGURES 15-17

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SIST EN 60068-2-40:2001
– 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––
BASIC ENVIRONMENTAL TESTING PROCEDURES –
Part 2: Tests – Test Z/AM: Combined cold/low air pressure tests
FOREWORD
1) The formal decisions or agreements of the IEC 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 international consensus of opinion on the subjects dealt with.
2) They have the form of recommendations for international use and they are accepted by the National
Committees in that sense.
3) In order to promote this international unification, the IEC expresses the wish that all National Committees
having as yet no national rules, when preparing such rules, should use the IEC recommendations as the
fundamental basis for these rules in so far as national conditions will permit.
4) The desirability is recognized of extending international agreement on these matters through an endeavour to
harmonize national standardization rules with these recommendations in so far as national conditions will
permit. The National Committees pledge their influence towards that end.
PREFACE
This Recommendation has been prepared by subcommittee 50A: Shock and vibration tests, of
IEC technical committee 50: Environmental testing.
A first draft was discussed at the meeting held in Munich in 1973. As a result of this meeting,
a Secretariat draft was submitted to the National Committees under the Accelerated
Procedure and submitted for approval under the Six Months' Rule as Document 50B(Central
Office)184 in October 1974.
It has the status of a basic safety publication in accordance with IEC Guide 104.
The following countries voted explicitly in favour of publication:
Australia Poland
Austria Portugal
Belgium Romania
Canada South Africa (Republic of)
Czechoslovakia Spain
Denmark Sweden
France Switzerland
Germany Turkey
Hungary Union of Soviet
Japan Socialist Republics
Netherlands United Kingdom
Norway

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