Data log directly from Norma 4000 power analyser rather than via Keithley 2700 data logger

[mhaque]

Hello fellow LabVIEW users

My Norma 4000 power analyser is connected to my Keithley 2700 data logger from which it logs data via GPIB using the attached VI.

Prior to making this VI I was not aware that the Norma 4000 could also log data values directly using labview which I found in the following LabVIEW post.

http://forums.ni.com/ni/attachments/ni/170/536731/1/LV9.zip

The Keithley logs the values into a *.txt file that can be opened in excel for analysis of the data. There are 7 values that are pulled from the power analyser and 1 from a radiometer and 1 from a temperature sensor. I essentially want the 7 values from the data analyser be directly input into the save file i/o rather than going via the Keithley which it is doing now. Some the signal is lost due to noise etc when going from ADC then DAC. Which is why certain values pulled from the Keithley have been multiplied before being put into file i/o.

Since these are popular instruments of choice I was wondering if anyone can direct me to any links to LabVIEW VIs that have already been made that DIRECTLY logs data values from the Norma 4000 into a *.txt file as in the attached VI. Or point me in the right direction perhaps. The LNOPA01 Getting Started.vi only shows current values. I want the data values to be logged into the *.txt files at certain time intervals with the corresponding signals from the radiometer and temperature sensor.

The Keithley drivers can be found in the following link

http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=E3B19B3E93BC659CE034080020E748...

Thanks for all the help beforehand.

[PaulRB]

Hi,

I was not able to find an example that will directly log data from the Norma 4000. I looked at the LNOPA01 Getting Started.vi and it seems like, with a few modifications, you could use this to log data. You would have to open a file, write the collected data to the file, and then close the file. You are already doing something similar to this in the VI you attached.

If you only want to measure data at certain times, you could use a case structure in the while loop and only write to file when a certain condition is met. If this isn't an option for you, could you please elaborate on what difficulties you are seeing?

Thanks,