ANSI EIA-364-31E-2017 pdf free download – Humidity Test Procedure for Electrical Connectors and Sockets.
2 Test resources
2.1 Equipment
The test chamber and accessories shall be constructed and arranged in such a manner as to avoidcondensate dripping on the test specimen.A suitable open screen tray or rack shall be provided toensure that the specimen shall be exposed to circulating air. Specimens shall not be subjected toradiant heat from chamber conditioning processes. The chamber shall be trap-vented to theatmosphere to prevent the buildup of total pressure. When readout charts are used, they shall becapable of being read with a resolution within 0.6 C (1 F). The relative humidity shall becontrolled within± 3%, and the temperature within±3 °C(王5 °F).Steam, distilled, demineralized,or deionized water shall be used to obtain the specified humidity. No rust or corrosioncontaminants shall be imposed on the test specimen by the test facility.
3 Test specimens
3.1 Description:
A test specimen shall consist of individual plugs，receptacles，or mated assemblies includingaccessories, shells, heat sinks, etc. that are normally part of the assembly.
3.2 Preparation:
The specimens, when specified, shall be wired using the contacts, wire type, size and, if applicable,sealing plugs. When required, and as applicable,mounting to test boards shall be indicated.Moisture absorption and temperature ratings should be reviewed when selecting test boardmaterial. Conformal coating may be used.
4 Pretest procedures
4.1 Mounting (applies to all procedures unless otherwise specified)
The specimens shall be placed in the test chamber in their normal application orientation, unlessotherwise specified. They shall be so positioned that they do not contact each other and shall beminimum of 5 centimeters (2 inches) from each other and any chamber surface. There shall be nodrip loops in wires.
4.2 Initial measurements (applies to all procedures)
Unless otherwise specified, prior to any initial preconditioning, the pre exposure measurements asspecified shall be performed at room ambient conditions.
4.3 Test durations (all procedures)
Unless otherwise specified, the duration of the test exposure shall be in accordance with one of the durations specified in table 1.
5 Test procedure
5.1 General
5.1.1 Test start Unless otherwise specified in the referencing document, the specimens shall be placed in the chamber at room ambient conditions. The chamber shall then be ramped to the initial test conditions, and the exposure shall proceed as specified in the referencing document.
5.1.2 Removal and recovery If specified in the referencing document, removal and recovery of test specimens shall proceed upon completion of exposure in accordance with the reference document. Otherwise, the specimens shall return to ambient conditions. Test specimens shall not be subjected to any means of artificial drying. If condensation is observed on the specimens, test sponsor shall be notified.
5.1.3 Final measurements Final measurements shall be performed in accordance with the reference document before, during, or after recovery, if so specified. Unless otherwise specified in the referencing document, final measurements shall be performed after return of test specimens to ambient conditions following completion of exposure. If the referencing document or measurement procedure specifies measurements to be conducted after a recovery period, but does not specify the duration of the recovery period, the recovery period shall be 24 hours at ambient conditions. Specimens shall not be subjected to any means of artificial drying.ANSI EIA-364-31E pdf download