Keithley 2400/2000/2700 Constant Fast Readout

[akossak]

Hi,

I am pretty new to Labview and trying to write a small script that will collect data from three different keithleys as fast as possible, a 2400, 2700, and 2000. For the 2700/2000 I just want the voltage readout but for the 2400, I want the current/voltage/resistance readout as I am sourcing the voltage. I want to to also update the txt file as it reads the data. I am trying to make it run as fast as possible so I get as many datapoints as possible. I have been looking through other posts and believe I have gotten the 2000/2700 at the max rate, but the 2400 I think is slowing me down. How can I make this script run faster so I can get more data points per second? Is there ways to improve the readout of the 2000/2400/2700?

Thanks!

[GerdW]

Hi akossak,

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@akossak wrote:

I am … trying to write a small script that will collect data from three different keithleys as fast as possible, a 2400, 2700, and 2000.

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You want to create a VI: a "script" is something different… 😄

Did you read the manuals of your Keithley devices to learn how to "read as fast as possible"? They surely suggest different approaches than to request just "1 sample"!

Suggestions:

• Place each device in its own loop to have them read "as fast as possible" - for each device.
• Use notifiers to store the most recent readings for each device.
• Use another parallel loop to store those most recent readings to your file - at a fixed "sample rate"…
• NEVER delete the label of frontpanel elements!
• Avoid race conditions like with your filewrite functions…
• Avoid building ever-growing arrays because in the long run they will limit your loop iteration rates! It also doesn't make sense to plot thousands of samples on a small graph…
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