07-06-2017 12:27 PM
Hi, we have bought an NI9145 with NI9220 (4nos) which is connected to the PXI-8119 as expansion, all the AI’s are configured as scan interface mode in LVRT. We are facing a problem while measuring the voltage, signal connectivity is attached
PS varies from 0-10V. While operating one of the SW1-4 we are not measuring the voltage more than 5.1V in ADC but after 5V the ADC voltage is reducing towards 0V. If all the switches are operated then all the ADC’s are reading up to 10V.
Can someone relate to this kind of problem
Thanks in advance
07-07-2017 11:56 AM - edited 07-07-2017 11:58 AM
Where's your COM reference? You can't just float off into infinity.
See "Floating Differential Connections" in the user manual