5thGen
2008-08-12 20:40:25 UTC
I am trying to read an analog signal using the cDAQ-9172 with module 9205. The signal has a current in the low uA range and ranges from 0VDC to 5VDC. I have grounded the COM port. An ammeter reads the correct voltage at the input of the 9205 but the VI displays something significantly lower. I am using the "DAQmx Create Channel" and "DAQmx Read" to monitor the signal. I am also finding that the values are jumping all over the place - within +/-200mV at around 1.5V. Why am I getting a voltage drop?Thanks,-Stephen