Fluke 196B and Fnirsi SG-004 how to make mA measurements correctly? - Page 1
Forum section: electronics / beginners

author: Lachin012
author_rank: Regular Contributor
timestamp: April 25, 2023, 10:50:37 pm
content: Hello! there is a Fluke 196B there is a Fnirsi SG-004 calibrator-generator, in the oscilloscope I selected the multimeter mode and also selected the current measurement mode, connected to the SG-004 output, selected the 4-20mA mode, launched the SG-004 and for some reason I did not see the necessary values, tell me how to properly set up the oscilloscope to see these same mA. I'm sure that I'm doing something wrong, I'm choosing something wrong. I don't know how current measurements should be made on Fluke 196B, Thank you.

author: Escalator
author_rank: Newbie
timestamp: April 26, 2023, 02:48:18 pm
content: For a multimeter its just com to com (black), and out (red) on the Fnirsi to your mA/A on your DMM.and then toogle output on the Fnirsi by getting that little white "run" LED to lid, by activating mA with the function button (FN) red and then click on "out" button and toogle to mA, but im not familair with the 196B and if there are certain aspect that makes the DMM aspect of that scope for plain current measurement, more cumbersome.One of these?https://www.eevblog.com/forum/testgear/fnirsi-sg-003a-sg-004a-signal-generators/you wanna do as one of the videos shows with mA-signal to a multimeter?

author: Lachin012
author_rank: Regular Contributor
timestamp: April 26, 2023, 04:56:28 pm
content: Quote from: Escalator on April 26, 2023, 02:48:18 pmYou misunderstood me, maybe if you make a measurement with a UT61E + multimeter, everything is simple (black) and the output (red) on Fnirsi, everything shows as it should, but if you connect it to Fluke196B, I don’t see the same thing as on the UT61E + multimeter, it shows completely different value, maybe I'm misunderstanding something. How to use Fnirsi, I know, the whole question is why Fluke196B does not display most of the values ​​that are on Fnirsi.I took a short video and a few photos.https://youtu.be/ylpJW-XV-m0

author: Escalator
author_rank: Newbie
timestamp: April 26, 2023, 06:43:28 pm
content: Your video is set as private, so people can't see it.and your pictures dont show how your hooked up to 196B.but the Fnirsi will just act as a crude current source 0-20mA .. does your 196B shows you correct mA values when used in other plain DMM usecases?

author: Lachin012
author_rank: Regular Contributor
timestamp: April 26, 2023, 08:19:42 pm
content: Quote from: Escalator on April 26, 2023, 06:43:28 pmYes, you are right, something did not load correctly, here is an updated link to the video.https://youtu.be/Bh-WQTAMGR0I connected to Fluke-196B in multimeter mode, here is a photo, here I applied 4-20mA with Fnirsi.

author: Lachin012
author_rank: Regular Contributor
timestamp: April 28, 2023, 03:08:05 pm
content: Hello! no one knows why in multimeter mode Fluke 196B shows mA differently from UT61E + ?

author: Werne
author_rank: Newbie
timestamp: April 30, 2023, 10:32:49 am
content: Page 29 ofthe manualmight help you understand where the problem is.

author: elekorsi
author_rank: Regular Contributor
timestamp: April 30, 2023, 10:34:27 am
content: You are using it wrong, i don't know where did you get this idea, but your Fluke Scopemeter does not have a current input. If you want to measure current, you must connect current probe. You can't measure it directly.You can use a shunt resistor with the value that will corespond to the options that you have for the current measurments on the scopemeter.For example, you can use a 0,1ohm shunt, which will give you a sensitivity of 100mV/A

author: Lachin012
author_rank: Regular Contributor
timestamp: April 30, 2023, 10:40:42 pm
content: Quote from: elekorsi on April 30, 2023, 10:34:27 amthank you, now I understand why it is not possible to measure the current directly, you need to order current clamps, thanks again.

author: Lachin012
author_rank: Regular Contributor
timestamp: April 30, 2023, 10:41:55 pm
content: Quote from: Werne on April 30, 2023, 10:32:49 amthank you,this document gave me a good understanding of how it works.