BS EN 16602-70-02:2014

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Space product assurance. Thermal vacuum outgassing test for the screening of space materials

Published By	Publication Date	Number of Pages
BSI	2014	48

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Category: BSI

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This Standard describes a thermal vacuum test to determine the outgassing screening 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, 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 outgassing and condensation acceptance criteria for a material depend upon the application and location of the material and can be more severe than the standard requirements as given in clause 5.5.3.1. This standard may be tailored for the specific characteristics and constrains of a space project in conformance with ECSS?S?ST?00. 7

PDF Catalog

PDF Pages	PDF Title
8	1 Scope
9	2 Normative references
10	3 Terms, definitions and abbreviated terms 3.1 Terms defined in other standards 3.2 Terms specific to the present standard
11	3.3 Abbreviated terms
13	4 Test overview 4.1 Test process description
16	4.2 Acceptance limits
17	5 Requirements 5.1 General requirements 5.2 Preparatory conditions 5.2.1 Hazards, health and safety precautions
18	5.2.2 Material samples 5.2.2.1 Configuration
19	5.2.2.2 Cleaning 5.2.2.3 Handling and storage 5.2.2.4 Identification of materials
20	5.2.3 Facilities 5.2.3.1 Cleanliness 5.2.3.2 Environmental conditions 5.2.4 Equipment 5.2.4.1 Test equipment 5.2.4.2 Special apparatus
22	5.3 Test procedure 5.3.1 General requirements 5.3.2 Test process for general spacecraft application 5.3.2.1 Cleaning of cups and collector plates
23	5.3.2.2 Conditioning of cups and collector plates 5.3.2.3 Conditioning of samples 5.3.2.4 Weighing of samples 5.3.2.5 Weighing of collector plates
24	5.3.2.6 Loading of system 5.3.2.7 Pump-down and heating 5.3.2.8 End of test 5.3.2.9 Gas inlet 5.3.2.10 Unloading of system
25	5.3.2.11 Storage of collector plates 5.3.2.12 Infrared analyses 5.3.2.13 Cleaning of system 5.3.2.14 Improved sensitivity of the CVCM measurements 5.4 Reporting of test data
26	5.5 Acceptance limits 5.5.1 General requirements 5.5.2 Acceptance limits for a retest of the material
27	5.5.3 Acceptance limits for application of a material 5.5.3.1 General 5.5.3.2 Corrective actions for high outgassing materials 5.5.3.3 Water absorption of materials
28	5.5.3.4 More stringent outgassing requirements
29	5.6 Quality assurance 5.6.1 Data 5.6.2 Calibration 5.7 Audit of the Micro-VCM test apparatus 5.7.1 General
30	5.7.2 Initial audit of the system (acceptance) 5.7.2.1 General requirement 5.7.2.2 Inspection of apparatus and associated equipment 5.7.2.3 Performing a blank test
31	5.7.2.4 Performing an actual test 5.7.2.5 Nonconformance 5.7.2.6 Reporting of audit findings 5.7.3 Annual regular review (maintenance) of the system 5.7.3.1 Inspection of apparatus and associated equipment 5.7.3.2 Mutual comparability evaluation (testing) 5.7.3.3 Nonconformance
32	5.7.3.4 Reporting of audit findings 5.7.4 Special review 5.7.4.1 General 5.7.4.2 Preservation of samples