Deviation of measurement | LabJack
 

Deviation of measurement

2 posts / 0 new
Last post
Jack
Jack1123123's picture
Deviation of measurement

Dear support,

I experienced a behavior of my U3 which i cant explain my self.

I am measuring 3.3Vdc/5Vdc /12Vdc at the AIN pins, the 12Vdc and 20Vdc are configured as special measuring higher voltages.

I want to know what the maximum deviation of my measurement will be?
How do I do this or how do i start with calculating this...?

Could you please explain to me.

Sincerely
Jack

LabJack Support
LabJack Support's picture
It sounds like your inputs

It sounds like your inputs could be floating, so check your connections:

https://labjack.com/support/app-notes/floatingunconnected-inputs

Besides that, please try removing all connections from the device and run through this application note on testing the AIN:

https://labjack.com/support/app-notes/test-AIN

You can find all of the U3 specifications on this page:

https://labjack.com/support/datasheets/u3/appendix-a