02-29-2012 03:02 PM
I have an agilent 34972a instrument.
It works fine with the LAN connection. I can find the instrument in MAX and I can collect the data through Labview.
But when I switch to usb connection. When I plug in the instrument, I even couldn't find the instrument in MAX. However, I can see it in Agilent IO expert.
I already checked the tulip in MAX. NI-VISA is installed as primary and agilent-VISA is secondary. I am not sure what's wrong.
Does anynoe can help me? Thanks.
03-01-2012 10:34 AM
Hi YC Chan,
In order for the device to be recognized by MAX the device must be recognized as a USB Test and Measurement Device. Does it appear under this category in Device Manager? Also what version of NI-VISA are you using?
04-03-2012 10:07 PM
I am having a similar problem... I installed command expert and Agilent IO libraries, and now Measurement and Automation does not see anything... I get the following: "There was a problem connecting to the database. Please restart your computer and contact National Instruments if the problem persists." I also deleted the "Data" folder in the MAX section so it can rebuild a new database, but somehow the drivers are getting messed up. I am using WinXP service pack 3.
Prior to installing Agilent stuff, MAX was working fine v.4.10.3001.
I will look around for another version of MAX and see if re-installing fixes the problem
04-04-2012 07:54 AM
When you installed the Agilent IO Control, it should have found the NI-VISA and left it alone and installed the Agilent VISA as secondary. I suspect something went wrong with that.
04-04-2012 10:03 AM - edited 04-04-2012 10:04 AM
Yes, I actually made Agilent's the secondary driver not the primary. Still it didn't work. I went to NI download section, and downloaded NI-VISA, and I re-installed it with MAX 5.0. That did the trick. Upon installing the new measurement automation, and rebooting my computer, both MAX and IO CONTROL libraries see the instrument.
I also went into MAX and enabled TULIP dll check box as it was recommended in other threads. I think the conflict went away. I am not sure why this happened, but if you guys experience this, re-install visa which contains the latest MAX in it. Reboot your machine, and hopefully the issue goes away as it did for me.