SIST EN 60068-2-66:2001

Environmental testing -- Part 2: Test methods - Test Cx: Damp heat, steady state (unsaturated pressurized vapour)

Provides a standard test procedure for the prupose of evaluating, in an accelerated manner, the resistance of small electrotechnical products, primarily non-hermetically sealed components, to the deteriorative effect of damp heat. The test is not intended to evaluate external effects, such as corrosion and deformation. Has the status of a basic safety publication in accordance with IEC Guide 104.

Umweltprüfungen -- Teil 2: Prüfverfahren - Prüfung Cx: Feuchte Wärme, konstant (ungesättigter Druckdampf)

Essais d'environnement -- Partie 2: Méthodes d'essai - Essai Cx: Essai continu de chaleur humide (vapeur pressurisée non saturée)

Fournit une méthode d'essai normalisée permettant d'évaluer, de manière accélérée, la résistance de produits électrotechniques de petites dimensions, principalement de composants non hermétiquement fermés, à la dégradation par la chaleur humide. L'essai n'a pas pour but d'évaluer les effets externes tels que la corrosion et la déformation. A le statut d'une publication fondamentale de sécurité conformément au Guide 104.

Environmental testing - Part 2: Test methods - Test Cx: Damp heat, steady state (unsaturated pressurized vapour)

General Information

• Status: Published
• Publication Date: 31-Aug-2001
• ICS: 19.040 - Environmental testing
• Technical Committee: ETC - Electrotechnical technical committe
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Sep-2001
• Due Date: 01-Sep-2001
• Completion Date: 01-Sep-2001
• Ref Project: EN 60068-2-66:1994 - Environmental testing - Part 2-66: Test methods - Test Cx: Damp heat, steady state (unsaturated pressurized vapour)

Overview

EN 60068-2-66:1994 - Test Cx: Damp heat, steady state (unsaturated pressurized vapour) is a CLC/EN environmental testing standard that defines a controlled, accelerated test procedure to evaluate the resistance of small electrotechnical products to damp heat. The standard targets primarily non-hermetically sealed components and focuses on internal deterioration caused by moisture and heat under steady-state, pressurized vapour conditions. It is classified as a basic safety publication in accordance with IEC Guide 104.

Key topics and requirements

• Test scope and purpose: Provides a repeatable method to assess moisture-related deterioration in small electrotechnical devices using an accelerated damp-heat environment.
• Test environment: Specifies a steady-state damp heat atmosphere using unsaturated pressurized vapour - details such as temperature, humidity control, and pressure regimes are defined in the standard (refer to the document for exact profiles and parameter limits).
• Specimen selection and conditioning: Guidance on which small components are applicable (primarily non-hermetic), preparation, mounting, and pre-conditioning prior to exposure.
• Monitoring and measurements: Requirements for electrical and visual monitoring during and after the test, including performance checks to detect degradation in functionality.
• Duration and test cycles: Defines exposure durations and steady-state timing to simulate accelerated ageing; these specifics are set within the standard.
• Limitations: Explicitly not intended to evaluate external corrosion, mechanical deformation, or environmental effects outside internal moisture-related deterioration.
• Safety and conformity: Classified as a basic safety publication per IEC Guide 104, indicating its role in safety-related testing regimes.

Applications and who uses it

• Manufacturers of small electrotechnical products (connectors, sensors, relays, small modules) use EN 60068-2-66 to qualify components for moisture resilience.
• Design and reliability engineers use the test to assess material and design choices against damp-heat degradation.
• Test laboratories and QA teams implement this standard for type testing, incoming inspection, and conformity assessment.
• Compliance and certification bodies reference the standard when evaluating product safety and environmental robustness.

Practical value

• Provides a standardized, reproducible damp-heat test to predict internal moisture-related failures and help improve product reliability.
• Supports accelerated ageing programs and comparative evaluation of component families or supplier parts.

Related standards

• EN/IEC 60068 series (other parts addressing additional environmental tests)
• IEC Guide 104 (basic safety publications and safety-related testing guidance)

Keywords: EN 60068-2-66, damp heat steady state, unsaturated pressurized vapour, environmental testing, humidity testing, electrotechnical components, accelerated ageing, IEC Guide 104.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2001
Environmental testing - Part 2: Test methods - Test Cx: Damp heat, steady state
(unsaturated pressurized vapour)
Environmental testing -- Part 2: Test methods - Test Cx: Damp heat, steady state
(unsaturated pressurized vapour)
Umweltprüfungen -- Teil 2: Prüfverfahren - Prüfung Cx: Feuchte Wärme, konstant
(ungesättigter Druckdampf)
Essais d'environnement -- Partie 2: Méthodes d'essai - Essai Cx: Essai continu de
chaleur humide (vapeur pressurisée non saturée)
Ta slovenski standard je istoveten z: EN 60068-2-66:1994
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIS
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