I've been using my Labjack U6s for a couple of months now and I'm starting to get the hang of it (I have two, will be getting more soon). I agree with the reviews that I've read, it's an excellent product.
I've been observing a behavior in the LJLogUD.exe application that I don't know how to explain. Please have a look at the attached pictures.
I have an Omega thermistor attached to the AIN0 and the GND of the Labjack. I also have a jumper from the 200uA current to the AIN0. The first picture shows the voltage reading I would expect to get, around 1.75V.
Things remain normal as I increase the amount of channels (please see pic 2).
However, after increasing the # Channels value above 4, the voltage reading for AIN0 immediately drops down to around 0.35 volts (pic 3). I've noticed when using other computers, I only have to increase the numbers of channels above 2 or 3 to observe the voltage drop. Nothing else has changed.
Why am I getting these differing voltage readings? The application LJControlPanel.exe seems to always show the voltage I would expect.
Thanks for the help!