SR830 Lockin-Amplifier - Difficulties to read buffer via VISA

[lau0606]

Hello everybody,

I have a SR830 Lockin-Amplifier from Satnford. I would like to read the value with a GPIB interface with a computer

I am able to communicate with the instrument (commands such as *IDN? work without any problem). I tried the official Labview driver to download the data but it’s not working for me.

I have tried to use the SR830 Visa modified.vi from here:

http://forums.ni.com/ni/board/message?board.id=170&message.id=202248

But in this case it’s also not working.

In fact my question is if someone has already a vi for this lock-in to get the display value and to visualize with labview and record a file with this value as a function of the time in a .txt format.

Thanks a lot

Laurent

[SteelStonehenge]

Hi Laurent:

    I'll have to dig into the deep recesses of my cranium for this.  If I remember, there was a bit of difficulty with the timing using single point samples.  We used the SNAP function instead, and it seemed to work a lot better.  At the time, there wasn't a ready-made Labview instrument driver, but there may be one now.  On the Lockin amp, be  SURE you have the GPIB assignments right....they start at 0, not 1, if I recall.

Let me know how it works.

eric