Rather than resorting to a serial port monitor, it should be easier to
find these instrument commands in a users manual. The user manual
should also document other details regarding serial settings,
communication protocol, and even possibly provide an example using
thier commands to get the instrument to do something. For additional
information, you can take a look at the instrument driver templates
at:
http://www.ni.com/devzone/idnet/development.htm
Just make sure that you have your VISA serial settings configured
properly. The templates should give you an idea of how to do this.