09-23-2010 07:43 AM
Hi, LabVIEW 2009, Windows 7, x86
1. I have just connected a USB Hanna HI3221 pH meter to the computer above.
2. The device shows up in the Windows Control Panel as working properly and identified as an HI3221.
3. I rebooted the computer, logged in again etc.
4. I start the "NI Device Monitor".
5. I plug in the USB Device and unfortunately as described on page 3 here
http://digital.ni.com/manuals.nsf/websearch/231F4BE79F2F7CB58625758300711E6E
I do not get prompted to begin a measurement with the device, to begin an application with the device, etc.
I don't see the device in MAX either.
Although I can browse other connected USB devices as VISA resources in LabVIEW, eg. a USB Agilent U2355a as "USB0::2391::4888::TW48052027::0::INSTR", I cannot see this USB device.
Can anyone throw any light as to how I can configure up this device?
Thanks in advance
Mike
09-23-2010 07:58 AM
Hey Mike,
I have had similar difficulties with my Tektronix TDS 2024B oscilloscope. The first time I used it, everything was fine. On subsequent uses, I usually have to plug it in several times before Max recognizes it. Windoze sees it every time, but not Max. Usually by the 5th or 6th time Max will spot it. Not the ideal solution, but it works for now.
09-24-2010 06:30 AM
Hi mike
Max is developed for NI hard ware and hence the drivers are primarily designed for NI products. As the hard ware is third party it is possible to create a driver using the VISA Driver Development Wizard .
Once created search for the device in MAX .
See the link posted below for a tutorial on USB control.
http://zone.ni.com/devzone/cda/tut/p/id/4478
Robert
09-24-2010 07:15 AM
NI has a driver for the Tektronics TDS2024B oscilloscope available on their website that they support. That sort of suggests that they expect it to work with their drivers doesn't it? Also, as I said, if I plug it in enough times MAX will finally recognize it, and after that it works fine.
09-24-2010 07:50 AM
What does a Tek scope have to do with a Hanna HI3221 pH meter?
USBTMC devices will show up in MAX. Check with the vendor to see what type of class their USB instrument. You may have to interface to their driver/api. Using the VISA driver wizard may get it listed in MAX but you will disable the vendor's driver and have a lot of hard work, even if you get the required info.
09-24-2010 09:31 AM
The TDS 2024B is a USBTMC device. As I said in my original posting, I usually have to plug it in several times to get it recognized by MAX. I do not know what type of device the Hanna PH meter is, but I was simply suggesting that the poster try reconnecting to see if he could get MAX to recognize it.