The Cove Business Standards Discussion Forums
Electrical contact resistance testing in MIL-DTL-5541
Please read this thread...
Software update
Electrical contact resistance testing in MIL-DTL-5541
Go Back   The Elsmar Cove Business Systems and Standards Discussion Forums > > >
Forum Username

Elsmar Cove Forum Visitor Notice(s)

Wooden Line

Electrical contact resistance testing in MIL-DTL-5541

Monitor the Elsmar Forum
Courtesy Quick Links


Links Elsmar Cove visitors will find useful in the quest for knowledge and support:

Jennifer Kirley's
Conway Business Services


Howard's
International Quality Services


Marcelo Antunes'
SQR Consulting, and
Medical Devices Expert Forum


Bob Doering
Bob Doering's Blogs and,
Correct SPC - Precision Machining


Ajit Basrur
Claritas Consulting, LLC



International Standards Bodies - World Wide Standards Bodies

AIAG - Automotive Industry Action Group

ASQ - American Society for Quality

International Organization for Standardization - ISO Standards and Information

NIST's Engineering Statistics Handbook

IRCA - International Register of Certified Auditors

SAE - Society of Automotive Engineers

Quality Digest

IEST - Institute of Environmental Sciences and Technology


Some Related Topic Tags
electrical - voltage resistance amperage etc., nadcap ac7108
Reply
 
Thread Tools Search this Thread Rate Thread Content Display Modes
  Post Number #1  
Old 9th August 2018, 02:47 PM
robanbieber

 
 
Total Posts: 22
Please Help! Electrical contact resistance testing in MIL-DTL-5541

Trying to interpret MIL-DTL-5541F in regards to whether electrical resistance testing is a requirement or not to be done on our class 3 panels every month. According to table 1 that lists the process control tests the electrical contact resistance states a requirement paragraph of section 3.7. Section 3.7 states that for class 3 coatings "Electrical contact resistance testing shall be as specified in the contract or order (see 6.4). The test method, frequency of testing, and required resistance value shall be specified by the acquisition activity to meet the needs of a particular application (see 6.1.2.1)."
Well 6.4 states "Acquisition requirements. Acquisition documents should specify the following:"
...
h. If electrical resistance testing if required for class 3 coatings (see3.7 and 6.1.2).
i. When electrical resistance testing is required, specify the required resistance values, frequency of testing, and test method (see3.7 and 6.1.2)."

Well if I am reading that correctly unless the drawing specifically calls out the Mil spec AND electrical resistance testing is required OR the contract with the customer specifically calls out electrical resistance testing is required ON Class 3 test panels for chem converted parts used in their product then our company is not required to perform electrical resistance testing on the class 3 test panels that are going out for salt spray testing. Am I interpreting the mil-dtl-5541 document correctly? Thanks. And yes we are NADCAP certificated for the chem conversion process and we have been doing electrical resistance testing on our class 3 panels that we send out for salt spray testing every month.... just concerned that we are doing more work than what the requirements are...

Sponsored Links
  Post Number #2  
Old 10th August 2018, 08:31 AM
Mike S.

 
 
Total Posts: 2,258
Re: Electrical contact resistance testing in MIL-DTL-5541

I have no expertise in coating, but it sounds like your interpretation is correct.

However, it is no sin to do more than required if you get some value from it. The requirements are minimums.

Only you know, or can determine, if that is the case or not. Does the resistance testing give you actionable data? Does the historical data show your process is in control? Does it help you verify your process is in control? Maybe by doing a resistance test it can save you doing more expensive tests elsewhere?
  Post Number #3  
Old 16th August 2018, 03:55 PM
robanbieber

 
 
Total Posts: 22
Re: Electrical contact resistance testing in MIL-DTL-5541

The problem is that the test is so damn sensitive. Coating the 6061 panel to Class 3 is no problem to pass salt spray but the electrical probe on our test fixture usually damages the coating and causes a failure. We know it is the probe that is damaging the coating because the pits occur in a repetitive pattern in the 10 areas that we press the probe into the panel to make the measurements. We wet sand the 1 inch square probe surface as smooth and flat as we can on a surface plate and take pains to ensure that the probe is contacting the base as flat as possible but usually to no avail. Just really frustrated having to explain that type of failure and if we do not have to do the test then it would remove that burden.
Reply

Lower Navigation Bar
Go Back   The Elsmar Cove Business Systems and Standards Discussion Forums > > >

Bookmarks



Visitors Currently Viewing this Thread: 1 (0 Registered Visitors (Members) and 1 Unregistered Guest Visitors)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Forum Search
Display Modes Rate Thread Content
Rate Thread Content:

Forum Posting Settings
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Emoticons are On
[IMG] code is On
HTML code is Off


Similar Discussion Threads
Discussion Thread Title Thread Starter Forum Replies Last Post or Poll Vote
Contact Resistance issue - Gold plating on PCB Alex.Nelson Manufacturing and Related Processes 3 9th May 2013 05:09 PM
Testing for Chemotherapy Drugs Resistance carlosandrosie ISO 13485:2016 - Medical Device Quality Management Systems 2 5th December 2011 03:21 PM
Resistance Static Testing of Stampings - M.O.ESS.F1B.F185 Cndngirl - 2012 Various Other Specifications, Standards, and related Requirements 4 19th March 2008 08:42 AM
Need Help With Electrical Resistance Problem JRKH Manufacturing and Related Processes 6 8th January 2004 09:48 AM
Resistance (ohm) Electrical Measurements with a DMM - Verify Shunt? AlbertPaglinawan General Measurement Device and Calibration Topics 14 15th May 2002 01:05 PM



The time now is 01:21 AM. All times are GMT -4.
Your time zone can be changed in your UserCP --> Options.



Misc. Internal Links


NOTE: This forum uses "Cookies"