How to wire two Turbidimeter Model 850 to one NI 9203 module (8 channels) ?

[tritran]

Hi all,

I am using NI cDAQ-9174 and NI 9203 analog current input module.  I want to use two turbidity sensor whose output are 4-20 mA.  I will wire the two negative lead of the turibidity sensors into one and connect it to the COM.  The positive lead of the turbidity sensor number 1 will goes to the AI0 and the positive lead of the turbidity sensor number 2 will goes to the AI1.  Am I correct?

The wiring diagram of the turbidimeter model 850 is attached below.

Thanks.

[Henrik_Volkers]

Sounds rigth 🙂

[tritran]

Thanks Henrik !

[KathrynTheGreat]

Hi Tritran,

It looks like you already have an answer, but if you're looking for more information on 4-20 loops, we have an article that goes into a bit more depth on the topic: here's a link.

[tritran]

Hi Kathryn,

Thanks for sharing the paper.