aded 2000 & 220 keithley Labview now I'm not sure how to use it? basically i do conductivity measurements using four point probe.i measure voltage for different current.here i need to develop lab view to collect theese data into Microsoft Excel work sheet.Why NI? Keithley build the things...
Drivers like these tend to be examples and illustrations of how to do
things. Such instruments are quite complex and can do many things, so to
write a driver package that will do everything the instrument can do is
quite a major undertaking and not something someone's going to do if they
don't have to. The end result is also going to be quite unwieldy.
I've written an application suite for the 2700, one program of which does
what the original poster seems to want- simple UI that sets up the
instrument for whatever reading and channels you want and writes the results
to an Excel spreadsheet. It's built on the low level Keithley drivers, and I
didn't make a great deal of modification to them- I just removed a few
reset/preset commands and replaced their GPIB code with my own. I made all
of the applications general purpose, so it took some days to do, but a
single fixed measurement type should be pretty trivial.
I've also written software for , I think, the 2400 SourceMeter which is
probably similar to this. In both cases, the Keithley/NI supplied *examples*
were perfectly sufficient as a basis and didn't seem particularly badly
programmed. There's not enough IN there to be particularly badly programmed.
There's some stupid omissions in the microcode for the 2700 though- like the
inability to pull SRQ when a scan has been acquired.
I assume the 2000/220 drivers are a collection of small routines that do
individual tasks. Just find routines that reset the instrument, set up the
measurement you want (the two driver sets I played with had one VI for each
measurement to simplify things), set up the triggering and then read the
data. String these together via their error clusters and see what happens.
Chances are you don't even need to use the instrument buffer and can simply
do spot readings.
As far as writing to Excel is concerned, there are examples on the NI
knowledgebase of sending data to individual cells. These examples should be
quite easy to adapt.
I've had a look around for the SourceMeter software I wrote but I don't seem
to have it any more. It was just something I cobbled together in an aftrnoon
for someone else here and I obviously didn't think it worthy of my user.lib
🙂
thomas kerberger wrote in message
news:3B32E1EF.E6C39025@ptb.de...
> Ther is the same problem with 2001/2700 driver from keithley.
> They are poorly programed.
>
> Please contact NI and ask for better drivers!
>
> NI told me that there are not enough people asking for newer/better
drivers
> and so there is no need to program them.
>
> thomas
>
> Praveen wrote:
> >
> > I have downloaded 2000 & 220 keithley Labview now I'm not sure how to
> > use it? basically i do conductivity measurements using four point
> > probe.i measure voltage for different current.here i need to develop
> > lab view to collect theese data into Microsoft Excel work sheet.
