ANSI ECA-364-91B-2016 pdf free download – Dust Test Procedure for Electrical Connectors and Sockets.
1 Introduction1.1 Scope
1.1.1 This standard establishes a test method to determine the susceptibility of an electricalconnector or socket system to the potential degradation mechanism of a dust/fiber environmentcommon to an office or manufacturing area.
1.1.2 This method may be used as a preconditioning test whereby the test specimen is exposed toa heavy concentration of dust and then exposed to a subsequent environment or as a”standalone”test.
1.1.3 This test should not be considered as an alternate or replacement for the EIA-364-50(Sandand Dust Test Procedure for Electrical Connectors and Sockets) that simulates an outdoor deserttype environment.
CAUTION —This procedure may involve hazardous materials, operations and equipment.This procedure does not purport to address all safety problemsassociated with its use or all regulatory requirements. It is the responsibility of the user of this procedure to establish appropriate safetyand health practices and to determine the applicability of regulatory
limitations before its use.
Test resources
2.1 Equipment
2.1.1 A dust chamber of sufficient size to allow the test specimens to be placed in the chamberwith the clearances as indicated in 4.1.
2.1.2 An air blower system of sufficient size to maintain a flow rate of 300 meters/minute(1000 feet/minute)±20%,unless otherwise specified in the referencing document.
2.1.3 A dust dispensing system capable of holding the volume of dust required.
2.1.4 A timing circuit may be required for those situations where dust is to be applied in a timecycle mode.
2.1.5 Unless otherwise specified,the air blower/dust dispensing system shall be capable ofblowing the dust in a vertically upward direction from the bottom of the chamber to the topof the chamber.
2.1.6 The chamber attitude shall be such that when the blower is in an off condition, the dust shallfall by gravity to the bottom of the chamber into a collection area.
2.2 Material
2.2.1 Dust composition
Unless otherwise specified in the referencing document, the specified dust composition shall beone of those listed in table A.l or A.2.The dust composition shall not be reused in any subsequenttest.
3Test specimen3.1 Description
The referencing document shall specify if the test specimens are to be exposed mated or unmated.lf unmated, it shall be specified if the receptacle,mating device or both is to be exposed. If notspecified, only the connector normally exposed to the environment shall be tested unmated.
3.2 Preparation
The test specimens shall be placed in the chamber in such a manner as not to be closer than 76millimeters (3.0 inch) from the walls of the test chamber and not closer than 76 millimeters (3.0inches) from the dust entry area.
3.2.1The specimens shall be held in place using non-reactive materials in a manner allowingunobstructed air flow around said specimens.
3.2.2 If multiple specimens are to be exposed simultancously, the specimens shall be placed so asnot to be closer than 50 millimeters (2.0 inches) from each other. Multiple specimens shall bespaced side by side in a manner that does not prevent dust accumulation on or in the specimens.3.2.3 The test specimens shall be exposed in their normal terminated state.
3.2.4 The test specimens shall be placed in the chamber in the orientation representing theirapplication and shall be specified in the referencing document.
3.2.5 Prior to exposure,the dust composition to be used shall be placed in a tray or holdingcontainer and evenly spread. The dust shall then be placed in an oven and dried at 50 °C± 3 ℃for 1.0 hour minimum.ANSI ECA-364-91B pdf download.