Reading of data of Agilent 34401

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• Instant update for Agilent 34401 DMM in LabVIEW

  Hello world

  I am to acquire 4 wire measurement of resistance using Agilent 34401 DMM. I used the multipoint read VI file and wired a chart for measuring 1 d output data. I get the graph but after the number of samples required was taken by the DMM. The requirement is to plot the graph instantly and continuously, i.e. as soon as the DMM acquires readings.

  How can I draw the graphs instantly?

  Thank you
  -Aditya

  adityasharma wrote:

  Hello world

  I am to acquire 4 wire measurement of resistance using Agilent 34401 DMM. I used the multipoint read VI file and wired a chart for measuring 1 d output data. I get the graph but after the number of samples required was taken by the DMM. The requirement is to plot the graph instantly and continuously, i.e. as soon as the DMM acquires readings.

  How can I draw the graphs instantly?

  Thank you
  -Aditya

  Do not use the Multipoint reading.  Just read a single sample.  But reading inside a for loop.  Then say you how many samples you take how many times you run your loop FOR.  Put your terminal board inside the loop FOR and connect to the output of the reading.

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  Hello

  I would like to save the output in more than 200 HZ to my power supply CC 6674 A Agilent with LabVIEW 8.2. Agilent 82357 A GPIB-USB interface is used to connect the power to the computer. And I used the instrument for Agilent 66XX driver I downloaded from OR.

  For reading continuous data, I put the read.vi in a while loop and data saved by writing in the file lvm. (just for the starter, not a good sense, though) Please see the attachment.

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  It's my first time to the instrument control and I just had a little experience in the acquisition of data before. I had some confusion as below: no I have gained a point each time the while loop is executed? If so, I guess that the time for each loop (and therefore my data rate) depends on my operating system and the computer I have.

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  Bohan

  The rate at which you can run the VI is dependent on the instrument/GPIB bus and use of Scripture on a Measurment file. Yes, you get a voltage reading and a current reading with each iteration and the number of bytes read is so that you can get a complete reading.

  I suggest you delete the entry in the file of the measurement of the loop to see how long takes of the instrument. That would be your maximum rate. If it's fast enough, use a different method to save the data. Architecture of producer/consumer if you pass the data to another loop via a queue would be a way.

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  Cedric Virpara

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