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Suggestions for Kelvin probes??

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Andrew_Debbie:
I investigated DIY using Pomona MDP dual bananas and Mueller BU-75K  kelvin clips.         Total was just under the minimum for free shipping from Mouser.

In the end I get to about £45 which is a lot less than buying a premade set.   

Cables are coming from AliExpress.   Dana suggest RG196U.   Yikes.  Too expensive and possibly overkill??   I ordered some RG178.



Andrew_Debbie:

--- Quote from: bdunham7 on October 17, 2021, 05:40:35 pm ---


However, if you (or anyone else here) is looking for the almost-Kelvin single contact probes like the Pomona 6303, I am working on one for SMD use and would appreciate input.  Specifically, what levels of resistance do you need to measure and how accurately?

--- End quote ---

>10mΩ

The 5100 is ±(.007%+6) counts on the  0.2KΩ scale  or about   6mΩ.     

I am designing a stand alone power monitor / checker for wall power supplies.   Like the common USB testers, but for various DC wall power supplies.    Initial design has a ~20mΩ surface mount shunt resistor.     I may end up using a larger value and putting 2 to 4 of them in parallel so I can check the parts with the 5100.     


My 5100 does not have the current option.   I'd like to make a current shunt box for it  and measure the resistance of the shunt at the accuracy of the meter.


blacksheeplogic:

--- Quote from: Andrew_Debbie on October 17, 2021, 07:52:58 am ---Unfortunately shrouded plugs won't work.  My Dana 5100 has incompatible binding posts.

--- End quote ---

What is the problem? It took me all of 30 secs with a blade to remove the shroud when I needed to 'convert' a set of leads I had.

Andrew_Debbie:

--- Quote from: blacksheeplogic on October 18, 2021, 07:32:56 am ---
What is the problem? It took me all of 30 secs with a blade to remove the shroud when I needed to 'convert' a set of leads I had.

--- End quote ---


Maybe cut off  the plugs and replace them with Pomona MDP dual bananas.    Hmmmm.....  Thinking ......

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