ADCMT 6240B

[Amin_ka69]

Hello everyone, 

I have been trying to make use the ADCMT LabVIEW driver to run and read the measurement back from the 6240B current source, but it seems like there is not any connection. I am using NI instruments GPIB-USB-HS cable and installed the latest version of NI-488.2. I am not an expert in this area and your guidance is very much appreciated. What should I check to find the root cause of the problem? 

[santo_13]

What do you mean by "there is not any connection" ? do you get any error?

Highly recommend to watch this tutorial - https://labviewwiki.org/wiki/VIWeek_2020/Proper_way_to_communicate_over_serial

[Amin_ka69]

Thank you very much for the reply, Santhosh! 

When I run the Labview, nothing happens to the current source. This is why I say there is no connection between them. 

I will definitely watch this tutorial.

best,

Amin

[GerdW]

Hi Amin,

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@Amin_ka69 wrote:

When I run the Labview, nothing happens to the current source. This is why I say there is no connection between them. 

I will definitely watch this tutorial.

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The video will not provide help your your GPIB communication…

• Does MAX recognize the GPIB device when scanning the GPIB bus?
• Do you call the driver VIs with the correct resource string?
• Do those driver VIs give any error outputs?
• Are these very old VIs still using the ancient GPIB functions or do they call VISA functions?
• Do you use a GPIB cable between the USB-GPIB and your device? Are you sure that cable works correctly (and did you try another cable)?

[Amin_ka69]

Thank you very much for your points. 

Now, after USB driver installation the connection is fixed. 

[Amin_ka69]

Hi GerdW,

The attached is my main VI for running the 6240b current source. Using it, I can generate step current. My aim is to probe the resulting step voltage response. This current source has the ability to measure the voltage itself. Now this VI's output is just the voltage points you can specify in the front panel. What it actually does right now, it generates for example 5 periods of step current and it outputs five voltages in the level values. But the point is that I want to see the voltage output real-time like the what I can observe on oscilloscope. Do you have any suggestions on how to do that? How can I make sure that the device itself has that ability? Will I need any external DAQ device? 

The main VIProbed voltage change using oscilloscope