DMM for internal resistance

Mosaic

Well-Known Member

• Jan 6, 2013

• #1

Hi all:
I am looking for a DMM that can do internal resistance down to 1 milli Ohm. (12 VLead acid batts )

Is the Fluke 289 capable of doing that with it's 50 ohm range , 1 milliohm resolution?

 

D

Diver300

Well-Known Member

Most Helpful Member

• Jan 6, 2013

• #2

No. Its resistance measurement assumes an unpowered circuit. It will be protected from damage on powered circuits but it won't measure resistance correctly on any circuit that has power on it.

Measuring internal resistance or ESR need specialist equipment.

 

K

KMoffett

Well-Known Member

• Jan 6, 2013

• #3

This should give you a usable method: https://answers.yahoo.com/question/index?qid=20080214215136AACzjrF

ken

 

large_ghostman

Well-Known Member

Most Helpful Member

• Jan 6, 2013

• #4

KMoffett said:

This should give you a usable method: https://answers.yahoo.com/question/index?qid=20080214215136AACzjrF

ken

Click to expand...

that's a realy cool method! i have written that in my book

 

Last edited: Jan 6, 2013

Mosaic

Well-Known Member

• Jan 6, 2013

• #5

Thanks, I figured as much.

Guess I'll go with the Fluke 87V and do the V+IR math using it's 10uV resolution.