Solutions for voltage measurement on 500+ channels?

[caliecalie]

I would like put together a system with NI components that can measure the voltage on up to 500 different signals. I have limited bandwidth needs (10 MHz would be acceptable). I see that there is a 1x196 Multplexer (NI PXI/PXIe-2575) which I could use in conjunction with an SMU.  However, I have more than 196 voltages to measure, so is there a recommended combination of multiplexers/SMUs to get to a larger number of channels?  

[crossrulz]

Are you trying to source a voltage (and/or current) or do you just need to measure the voltage?  If you are just measuring the voltage, I would use a bunch of DAQ boards.  Start by having a look at the PXIe-6375.  It boasts 208 single ended analog inputs that you can read from.  Three of those and you are up to 624 channels.

[caliecalie]

I just need to measure voltage.  I will take a look at the 6375. Thank you!

[ramazano]

I am also trying to measure voltage of 80-channel at a time using PXI-6225 for sensor applications (ion selective electrodes/electrochemical sensors). Basically, I want to measure potential change in each channel against one reference electrode (Ag/AgCl). Can you suggest me an example of software that makes my work easier and I can use and/or modify it? I don't have any experience in Labview, unfortunately. 

I attached the images of the instrument and card.

Any input is appreciated. 

Thanks.

[Cavarval]

Hello,

I see you started this thread already.

https://forums.ni.com/t5/PXI/Solutions-for-voltage-measurement-on-80-channels-using-PXI-6225/m-p/391...

Regards,