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Fast readings with Keithley 2010 Multimeter?

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Lars Christiansen

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Jul 7, 2003, 8:04:44 AM7/7/03
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Hi!

I'm a newbee to LabView and am trying to control a Keithley 2010
Multimeter using GPIB and the driver from Keithleys homepage.

I have managed to make a VI, that makes a single voltage read from the
2010, but using that method, I can only read 0.7 times pr second as
the fastest. And that is not fast enough!

How do I get readings faster? I have experimentet with the other
components in the driver, but without succes this far. Maybe because i
configure them in the wrong way, but I'm not sure. I want to make
measurements with delta t time steps N times.

Which VI's in the driver package should I use?

I use LabView 7 and am right now using a simple power supply to test
on.

Thanks for your help!

Lars
Stud.Scient
University of Copenhagen

Dennis Knutson

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Jul 7, 2003, 10:35:00 AM7/7/03
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I haven't used the instrument but looking at the driver, I would think
that the example called Keithley 2010 Multi Read Example is the one
you want to use. It will take multiple readings based on internal
timer, external trigger, bus trigger, etc. and then return an array of
readings. This should be much faster than a single read.

Lars Christiansen

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Jul 8, 2003, 5:45:33 AM7/8/03
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Thanks!

The files work - after I changed the decimal separator from , to . on
the computer. It runs with about 33 readings pr second. I will have
to check with my boss to see if that is good enough, as soon as he is
back from a conference. If not, I will look further into using the
Multi Read Example (in the driver package from Keithley), which I
haven't had much succes with this far.

Yours, Lars.

Lars Christiansen

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Jul 25, 2003, 5:46:18 AM7/25/03
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Nice! Works fine now! In the mean time my boss came back (from Russia)
and told me, that he won't need to make measurements at a high rate,
so using a "single read" method will be sufficient and I've ended up
designing the program in a different way. But thank you for the help!
I will probably incorporate the "multiple read" method in the program
later - it might come in handy later. I don't understand though why a
high resolution is important. The K2010 DMM Manual tells me, that the
output (throught the GPIB) is not influenced by the precission (the
number of digits on the display). Chosing Manual Range makes sense
though.

Cool icon! Werner!!

Thank you again for the help!
Lars.

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