ANSI EIA-364-95-1999 pdf download Full Mating and Mating Stability Test Procedure for Electrical Connectors
1.4 Description The item to be evaluated will be examined according to the procedure(s) selected to check for full connector mating condition. These are nondestructive procedures and as such, have limitations of the extent to which the item under test can be inspected. Some connectors are designed to have “metal-to-metal” bottoming as a criteria of the full mating conditions, whether or not an interfacial seal is present. Other connectors are designed with interfacial seals which by design preclude metal-to-metal bottoming. The following selection of methods is intended to allow choice of the one most appropriate technique for the particular connector being evaluated. Documentation is required to complete the testing of a connector pair, following the required information requested in clause 6. 1.4.1 Test method A, test measurement for mating stability A fully mated connector plug and receptacle pair shall be marked with indicator lines such that an accurate ± 0.02 millimeters (0.001 inch) axial measurement can be made. This should be done on at least 2 opposite sides of the connector.
1.4.2 Test method B, test measurement for coupling ring stability A fully mated connector plug and receptacle pair shall be marked with radial marks on both the coupling ring and the receptacle. These marks will allow observation of coupling ring rotation relative to the receptacle. In addition, axial marks shall be applied to both coupling ring and receptacle shell to allow observation of translation of the coupling ring relative to the receptacle shell. Measurements are made before and after the appropriate mechanical or environmental tests.
1.4.3 Test method C, metal-to-metal bottoming There are at least two methods which will enable determining whether or not a condition of metal- to-metal bottoming of shells is achieved. Use one of the methods and indicate which one was used in the documentation of the test; see clause 6. Method C should be performed in conjunction with methods A or B when assessing environmental effects.
1.4.3.1 Test method C-1, transfer indicator Using a transfer compound (such as a bluing compound) as an indicator on one of the connector mating surfaces, check the opposing mating surface following a fully mating test. This opposing mating surface should indicate evidence of marking transfer. Transfer of marking material shall be the indication of achieving metal to metal bottoming.