Hi,
I'm fairly new to NI but have some expereince using LabView and DaqExpress.
I have recently been measuring strain on asphalt material using half bridge1 config. 120 Ohm Gauges, 2.5V excitation, 2.13GF. As I am working with foreign students I have been using DaqExpress as the interface is easier to demo/train on. With the half bridge set up everything was as expected. I then switched over to a quater bridge 120 Ohm Gauges, 2.5V excitation, 2.13GF. When readings of the same material types are compared the quater bridge gives roughly 4 to 5 times higher readings than half bridge. Can anyone suggest why this may be?
Using NI9237 with NI9949 for half bridge, and NI9944 for quater bridge completion!