I am trying to use a NI-4351 for temperature measurement (together with TX-68T connector block). However, I don't get a proper signal in our laboratory. Using the MaX and looking at the test panel: there is sometimes the right voltage but most of the time the signal is noisy or even more than that: it is jumping to the maximum and minimum of the voltage range (for every voltage range).
In an another building with another supply circuit the signal is okay. So we suppose an EMC problem: Together with the Elec. department we have disconnected all "critical" consumers- no change, also filtering the supply of the PC has no effect.
Can you propose a special supply voltage filter? The noise frequency is very low (less than 1 Hz). Other lab cards and electronic devices work properly under the same conditions. Has anyone ever had this kind of problem? Any solutions?
okay, but I don't know how to do it. Is there any possbility to do this in the MAX? Or can I access the card directly (without MAX?)? Or do I have to check hardware pins? Because at the moment I am using 2 virtual channels to make a readout in LabView and these virtual channels are not representing a real hardware information.
