Education

Mixed Flowing Gas (MFG)—A Corrosion Oriented Test

MFG—A Corrosion Oriented Test Dr. Bob outlined a harsh environment test called mixed flowing gas (MFG) in his last article. Here’s my take on that subject. The MFG test was a sponsored program initiated by the Battelle Institute and funded by over 70 companies from the private sector. Interest in this topic was high. ThisRead More

Test Group 4: Let’s Not Be Too Harsh

Dr. Bob on Test Group 4: Let’s Not Be Too Harsh Test group 4 of EIA364D includes testing in a harsh environment, or corrosion based on exposure. The complete generic test sequence for EIA 364D was shown in the first article in this series. Test group 4 calls out a “harsh environment,” and that descriptionRead More

Group 2A Tests

Group 2A Tests – Supplementary Connector Housing Testing Options The test sequence Dr. Bob outlined in his last article is a supplementary sequence of tests performed at the same time as Group 2 tests. The basic difference is that the Group 2 variable measurements concentrate on measuring low-level circuit resistance (LLCR) or contact resistance (CR),Read More

Connector Testing EIA 364D Test Group 3

Connector Testing EIA 364D Test Group 3 – The house is only as strong as the foundation Test group 3 of the EIA 364D test sequence is intended to directly assess the stability of the polymer used in the manufacture of the connector housing. The development of so-called engineering polymers over the past few decadesRead More

Comparison and Performance: EIA 364D Test Group 2

Dr. Bob on Comparison and Performance: EIA 364D Test Group 2 This test group is the longest of the groups in the EIA 364D generic test sequence. A copy of the test group is attached for your convenience. The entire test sequence can also be found in the first article in this series. Test groupRead More

Vibration Testing: Shake, Rattle, and Roll—No Shock!

Vibration Testing: Shake, Rattle, and Roll—No Shock! Vibration testing is one of the key tests that is required in qualification testing. The basic purpose of this test is as follows: The purpose of vibration testing is: To determine the effects of vibration within the predominant vibration frequency range and magnitudes that may be encountered duringRead More

Shock, Rattle, and Vibrate with the EIA 364D – Group 1 Test

Shock, Rattle, and Vibrate with the EIA 364D – Group 1 Test per Dr. Bob  This article will begin the discussion of the generic test groups identified in EIA 364D: Electrical Connector/Socket Test Procedures Including Environmental Classifications. For reference, you can find the 364D generic test program in the first article in this series, “TheRead More

Measure Twice, Test Once

Measure Twice, Test Once In the first article in this series on connector testing, I stated that a test is a combination of conditioning/exposures and measurements. All test sequences begin with a measurement to establish the baseline for the parameter of interest, e.g. electrical resistance, prior to a conditioning or an exposure intended to simulateRead More

Devil or Angel? Connector Testing

Dr. Bob Asks – Devil or Angel? Connector Testing Connector testing is generally viewed as a nuisance type of activity. So let’s try to set the record straight. The basic purpose of testing is to demonstrate the capability of a connector to meet the specific design characteristics called for and/or to determine the susceptibility, orRead More

The How and Why of Connector Testing Programs

Dr. Bob on The How and Why of Connector Testing Programs This article will provide an overview of connector testing programs in terms of procedures and purposes—the “how” and “why” of connector testing. Future articles will expand on this discussion to provide specifics and rationale for the test programs and individual test groups. Beginning withRead More

Connector Degradation Mechanisms to Connector Testing

Dr. Bob Relates Connector Degradation Mechanisms to Connector Testing New Connector Series Begins The last article on loss of contact normal force completed the series on connector degradation mechanisms. (For completeness, the series included an introductory discussion of degradation mechanisms, two articles on corrosion—one on fretting corrosion and one on corrosion in noble metal contacts—anRead More

Degradation Mechanisms – Loss in contact normal force

Degradation Mechanisms – Loss in contact normal force In the previous article on wear as a degradation mechanism, I noted that wear is an indirect degradation mechanism. Wear of the contact finish, if it exposes the underlying base metal of the contact spring, introduces additional sources of corrosion directly at the contact interface. Similar commentsRead More

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