EN 14091:2002

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
   3.1 Terms and definitions
   3.2 Abbreviated terms
4 Preparatory conditions
   4.1 Hazards, health and safety precautions
   4.2 Material samples
        4.2.1 Configuration
        4.2.2 Cleaning
        4.2.3 Handling and storage
        4.2.4 Identification of materials
   4.3 Facilities
        4.3.1 Cleanliness
        4.3.2 Environmental conditions
   4.4 Equipment
        4.4.1 Test equipment
        4.4.2 Special apparatus
5 Test procedure
   5.1 Introduction
   5.2 Test process for general spacecraft application
        5.2.1 Cleaning of cups and collector plates
        5.2.2 Conditioning of cups and collector plates
        5.2.3 Conditioning of samples
        5.2.4 Weighing of samples
        5.2.5 Weighing of collector plates
        5.2.6 Loading of system
        5.2.7 Pump-down and heating
        5.2.8 End of test
        5.2.9 Gas inlet
        5.2.10 Unloading of system
        5.2.11 Storage of collector plates
        5.2.12 Infrared analyses
        5.2.13 Cleaning of system
        5.2.14 Improved sensitivity of the CVCM measurements
6 Reporting of test data
7 Acceptance limits
   7.1 Acceptance limits for a retest of the material
   7.2 Acceptance limits for application of a material
        7.2.1 General
        7.2.2 Corrective actions for high outgassing materials
        7.2.3 Water absorption of materials
        7.2.4 More stringent outgassing requirements
8 Quality assurance
   8.1 General
   8.2 Data
   8.3 Nonconformance
   8.4 Calibration
   8.5 Traceability
9 Audit of the Micro-VCM test apparatus
   9.1 General
   9.2 Initial audit of the system (acceptance)
        9.2.1 Inspection of apparatus and associated equipment
        9.2.2 Performing a blank test
        9.2.3 Performing an actual test
        9.2.4 Nonconformances
        9.2.5 Reporting of audit findings
   9.3 Annual regular review (maintenance) of the system
        9.3.1 Inspection of apparatus and associated equipment
        9.3.2 Mutual comparability evaluation (testing)
        9.3.3 Nonconformance
        9.3.4 Reporting of audit findings
   9.4 Special review
        9.4.1 General
        9.4.2 Preservation of samples
Annex A (informative) Examples of filled in data sheets
Annex B (informative) Example of a certificate of conformance

This European Standard specifies a thermal vacuum test to determine the outgassing properties of materials proposed for use in the fabrication of spacecraft and associated equipment, for vacuum facilities used for flight hardware tests and for certain launcher hardware.This standard covers the following:-critical design parameters of the test system;-critical test parameters such as temperature, time, pressure;-material sample preparation;-conditioning parameters for samples and collector plates;-presentation of the test data;-acceptance criteria;-certification of test systems and their operators by audits and round robin tests.The test described in this standard is applicable for all unmanned spacecraft, launchers, payloads, and experiments. The test is also valid for external hardware of inhabited space systems and for hardware to be used in terrestrial vacuum test facilities.The acceptance criteria for a material, based upon the outgassing test data, depends upon the application and location of the material and can be more severe than the standard requirements as given in 7.2.