After getting the DAQ card back for repair (RMA 7063436),
replacing
it, and observing that it appeared to work correctly, I tried running an
experiment today and after a few runs the same problem ocurred again
(output
channel outputs a constant voltage, regardless of command). I had gone
through
each component of my experiment testing it for shorts, and I even ran
through
an experiment using an external power supply in place of the NI device, and
everything appeared normal. I assume that whatever is causing the problem
is
some component of my system, but I haven't yet been able to tell exactly
which
component. I still have one functioning output channel, but I don't want
to
use it if it is just going to blow the output channel again. My question
is,
should I need the card repaired again, would this repair be covered under
the
warranty from the previous repair. I assume not since the card appeared to
work correctly when I got it back, but I figure it wouldn't hut to ask.
Best Regards,
Jami McLaren
University of Minnesota
Mechanical Engineering
High Temperature and Plasma Laboratory
612-624-2043
