Read method for Keithley 6485

I wrote a kit for Keithley 6485 model picoammeter. But it doesn't work. Instrument has given an error and "TALK" indicator has activated. I attached the kit. Please could you help me. Thanks
Attachments:
6485-READ.vi ‏79 KB

I'm currently (excuse the pun) also using the Keithley 6485. I found the easiest way to to initialize it and read data was to use the examples available on the Keithley website. You do however also have to download their 'Keithley Input Output Layer' code to make them work. I downloaded version C02, assuming it was the latest version available.
http://www.keithley.co.uk/data?asset=52766
I tried running your VI on my computer and it didnt work also.
Heres the stripped down VI that works for me (if it successfully attaches! My first reply on here).
It's for LV9, so hope it works on LV8.5 also.
Attachments:
keithley 6485 functions.vi ‏22 KB

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Hi,i have very simple question, i have keithley 6485 .. communication looks like ok. I tried examples here of the forum ..i mean that they worked properly. Beacause my english is very poor I dont know : if I want to show in my VI some data, must i something to measure on the device?

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Attachments:
KE6485_ZeroChk_LV86.vi ‏14 KB

Hello,
3rd party devices will show in MAX only when that device is listed at a specific place within your computer's registry. Non-NI hardware may not show up in MAX.
As far as the logical name is concened, unfortunately, you will have to contact Keithley to get a better understanding of their code.
You could download our IVI driver from the link below as you might have better luck with it. You can find any of our 3rd party drivers at www.ni.com/idnet.
Keithley 6485
http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=238
Regards,
Shawn S. | NIC
Instrument Driver/IVI PSE
National Instruments

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I am trying to take measurements using a Keithley 6485. The vi configures the instrument to take 2500 points and save them in the internal buffer. The configuration is ok and it records as requested but when I try to retrieve the data from the internal buffer a big chuck of it goes missing. This only seems to be a problem when I set the buffer size to be greater than 1000 points.
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Attachments:
K6485_example.JPG ‏57 KB

Hi Dennis,
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Attachments:
k6485buffer.JPG ‏55 KB

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Attachments:
KE6485.LLB ‏2952 KB
KE6485 Examples.llb ‏795 KB

Forum member smercurio_fc converted these files for another member to 8.2 which you should be able to open in 8.6. Below is the link.
http://forums.ni.com/t5/Version-Conversion/Upconvert-Keithley-6485-to-10-from-5-1/m-p/2108260#M1151
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thanks a lot guys for your suggestions and comments.
at the present time I'm using the analog output of the Pico -Amp to recored the readings via a Daq since I couldn't control it form the drivers. So, I only control the Pico Amp from the front panel.
Dennis, thanks for your suggestions and it is true that fetch multi-point is faster but it is still not fast enough since I want reading at a rate of 40-50 Hz. if you know of a way to increase the readings rate to the frequency I need it will be helpful.
F. Schubert, thanks for comments. I don't know how to change the NPLC since when I change the value in the VI an error message appears and Labview terminates. the NPLC setting is 1 and PLC 60 Hz.
I attached a sample of VI I'm using to find the readings from the Pico-Amp and I would appreciate any suggestions to improve the readings rate. also how can I change the NPLC value of the device?
Thanks
Message Edited by Zeyad on 09-13-2007 11:51 AM
Attachments:
Pico_AMP_tests_2.vi ‏125 KB

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Read method for Keithley 6485

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