Hi ahad,
The best way to move forward is to identify which module in your
system is causing the problems. What I would do is:
1) Check to make sure it is not your DAQ card. You can do this by
applying the 5V reference from the card to channel 0 and make sure
when you test channel 0 in Measurement & Automation Explorer you read
5V. To measure the value, you can use the Test Panels for your
device.
2) You can also run the online E Series Diagnostic Utility to
determine if you have a problem. It requires NI-DAQ 6.9 or higher and
Internet Explorer 5.0 or higher. Here is the link:
http://www.ni.com/support/selftest/default.htm
3) If your DAQ board passes those tests, then it is not the DAQ board.
The next thing to check is that your cable and pins are not the
pr
oblem. You can use a multimeter to check for continuity on the
cable.
4) Move the channels you were measuring from channels 0-3 to channels
that were working correctly. If you notice that the problem follows
the move then it is morelikely your circuit or device that you are
testing. If the trouble is still on channels 0-3 then it could be the
AMUX-64T.
5) Check the wiring to the AMUX-64T to make sure no wires are loose.
It could be that those paths internal to the device have been damaged.
What I would do is put a battery or some known voltage source on one
of the channels and scan through all the channels to see if you can
still see that signal. If you can't then, the board might have been
damaged. If that is the case, then you will have to request a repair
on the board (ni.com/ask).
Anyway, hope that helps. Have a good day.
Ron
Applications Engineering
National Instruments
