Ground Loops in 4-20 mA Signals

This webinar offers a basic framework designed to guide you in understanding and preventing ground loops. While a common problem, many instrumentation installers do not fully understand why ground loops happen, or how to avoid them. This is a discussion for instrument installers, operators, and those who specify 4-20 mA process equipment who are not experienced electrical engineers.

[@Banjoba]

This is an excellent video. We have been working on an issue that turned out to be a floating voltage on a 24v power supply that didn't have its negative line connected to common earth. This video helped me a lot.

[@predig]

Thanks for the feedback, Paul! We're glad to hear you found our video useful.

[@jacquedreyer5479]

Another fantastic video - thank you for making this information public, it is greatly appreciated!

[@predig]

Glad to hear you found this video useful, Jacque. We appreciate the feedback.

[@tomaspuodziukynas5361]

Thank you for quality training.

[@Right_Stuffsc]

thank you for sharing.. truly good learning.. about current 4 to 20ma current loop.

[@mihaiadam4024]

this is equal to years and years of experience, thank you

[@predig]

We're glad you found this useful. Thanks for the feedback!

[@mcel2799]

Very good siminar. I'm hoping that add more videos. Thanks and God bless precision digital teams.

[@predig]

We're glad you found this webinar useful!

[@thecityofjoy]

Yes, good seminar by Precision Digital. Could you do a seminar on instrumentation types and valve types in general .

[@predig]

Responding a year late, but we're glad to hear you found this webinar useful. We will consider your suggestion for a future webinar.

[@ihategoogleplus490]

Helpful video. Thank you!

[@predig]

Glad it was helpful!

[@jimbass924]

Great video

[@johnsolo5392]

Can these ground loops effect HMI devices and PLCs in none 4 - 20 mA current loop applications?

[@predig]

Hi John. I apologize for the delay in our response. That's a good question! Let me get back to you on that.

[@predig]

To answer your question, in theory, you could have ground loops affecting your HMI devices without a 4-20 mA loop in the system. It could happen if you are sharing non-isolated power supplies and serial communication lines, etc. We focus here on 4-20 mA signal related ground loops because that is the most common area where we see them happen.

[@sanilalkuttimon1755]

❤️❤️❤️

[@owinookello9358]

nice video guys

[@predig]

Thank you! We hope you found it useful.

[@TheBigDirtyz]

effects of ground loop @36:40 lol. good video.

[@predig]

We had to cover the basics first, but hopefully you found this useful.

[@TheBigDirtyz]

@@predig I was making a joke about the momentary audio blip, but the entire video was helpful. it covered everything I overlooked when in school. All I knew was to shield one end of the twisted pair and never put much thought into why. thanks

[@predig]

@@TheBigDirtyz Glad to hear this was helpful. Thanks for your feedback.

[@aaronartale]

9:43

[@RobsRobotChannel]

I admit, I am scared of ground loops.

[@predig]

We hope you found this video useful so that you can defeat that fear with knowledge!

[@michaellatu4092]

Skip to 3.28

[@michaellatu4092]

Actually skip to 9.21 ...

[@hohtz]

Why 4-20 should be repeated thousands of times?