Data from Picoammeter to PC via RS232-USB cable

[Max999]

Hi Blokk,

Thanks very much! Your method works. I tried the driver before, download from http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=238, but there was always a compatibility problem, shown below.  However when I tried your method, I can install the suitable driver, which solved the problem. 

[Blokk]

If my post solved your problem, mark it as a solution. So future readers with similar problem will find the relevant post faster.

[robkeyse]

Thank you  for the post and the replies, I have the same Keithley pico-ammeter and want to data-log the readings over an extended period (e.g. an hour or more).  I've used a NI USB-serial cable and ran an example VI  - it provides for a plot of relative values (Keithley 648X Series Acquire and Enable Relative Values.vi).  This works well, and I would like to have a TDMS output file of the measurements as a record of my current source falling over time (cold field emission electron microscope) instead of the relative values, I tried getting data-logging to work from the LabView menu but without success.  I've a feeling that the block diagram needs to be changed but so far I've only managed to break the example by getting into trouble with incompatible variables.

I've found an example that data-logs a Sine wave so I should be able to unpick that and hope to progress to a data-logging pico-ammeter VI.

[Max999]

Hi  robkeyse, please see the pictures attached. I hope it helps.

[robkeyse]

Thanks very much I have used a loop as you suggest, it works nicely and I can make available to our students.

[Max999]

[shivpandey]

I really appreciate the examples this are really great and needs to get implemented more and more as the lab view and all are explained just perfectly in its best way.

[Amit_Sharma]

I am new to LabVIEW, and i want to measure current with my Picoammeter 6485. I want to store data from picoammeter for time duration like 10 Seconds. 

there is a example program named 'Keithley 648X Series Acquire and Enable Relative Values'. will this do the work?