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Products => Test Equipment => Topic started by: ballsystemlord on October 13, 2023, 02:45:04 am

Title: [Solved] What's the 4-20ma percentage fuction on DMMs used for?
Post by: ballsystemlord on October 13, 2023, 02:45:04 am

In the spread sheet here: https://www.eevblog.com/forum/testgear/multimeter-spreadsheet/ (https://www.eevblog.com/forum/testgear/multimeter-spreadsheet/)
There's a function listed as 4-20ma. It's explained in the thread that it means that the DMM reads:
0% for 4ma
50% for 12ma and
100% for 20ma.

What is this useful for? Like aside from LED current draw?

Thanks!

Title: Re: What's the 4-20ma percentage fuction used for?
Post by: ataradov on October 13, 2023, 02:53:19 am

It is a standard control current for industrial applications. https://en.wikipedia.org/wiki/Current_loop