Instrument driver

[CraigGraham]

Someone here has just purchased a Keithley 2400 source/measure unit for
doing I-V characterisations on some diodes they make. The group wants to
drive it from Labview to acquire, preferably in log space, a series of I-V
measurements. On the face of it this could be almost trivial if the bare
minimum of coding were done, however nobody in that group has Labview
programming experience. I do, but am reluctant to get involved since I have
too much other stuff backlogged to be volunteering myself.

I've had a nosey around ni.com and found something for an old Keithley
instrument that does the same job- with luck the newer instrument will be
essentially an upgrade and will understand the same instructions. However,
in case this doesn't work, d
oes anyone have a VI they're willing to share
that at least can be used to set a voltage and return a current? I'm willing
to do some modification if necessary to get the data out and onto disk.

[Dennis_Knutson]

I used this instrument in a project a few years ago. I got a LabVIEW driver
from Keithley. Check their web site and your local sales rep. If you still
can't find it, I'll try and see if I still have a copy.

"Craig Graham" wrote:
>Someone here has just purchased a Keithley 2400 source/measure unit for>doing
I-V characterisations on some diodes they make. The group wants to>drive
it from Labview to acquire, preferably in log space, a series of I-V>measurements.
On the face of it this could be almost trivial if the bare>minimum of coding
were done, however nobody in that group has Labview>programming experience.
I do, but am reluctant to get involved since I have>too much other stuff
backlogged to be volunteering myself.>>I've had a no
sey around ni.com and
found something for an old Keithley>instrument that does the same job- with
luck the newer instrument will be>essentially an upgrade and will understand
the same instructions. However,>in case this doesn't work, does anyone have
a VI they're willing to share>that at least can be used to set a voltage
and return a current? I'm willing>to do some modification if necessary to
get the data out and onto disk.>>>

[CraigGraham]

Someone else also mailed me suggesting checking out Keithley- I initially
didn't because I assumed anything they had would have been shipped with the
instrument, and the guys playing with it told me no Labview stuff was
supplied (though there were Labview examples with my Keithley 2700 unit).

I've looked at the Keithley website and discovered, incredibly, that
although they have a 2400 library, it is for Labview3 and of course can't be
loaded in the current 5.x/6.x installations.

If they can't get anywhere with the "older" stuff I pulled from ni.com then
I'll just have to convert this v3 file up to a current version, which is
doable since I still have the v3 and v4 installation disks, but it's not
something I'll work on until they've tried the older driver
s and see if they
work.

Dennis Knutson wrote in message
news:3a38e28f@newsgroups.ni.com...
>
> I used this instrument in a project a few years ago. I got a LabVIEW
driver
> from Keithley. Check their web site and your local sales rep. If you still
> can't find it, I'll try and see if I still have a copy.

[Dennis_Knutson]

I just went to www.keithley.com and from there Technical Support>Instruments>2400
and got KEI2400.llb that loads into LabVIEW 5 and 6. It doesn't use VISA
but that's an easy conversion.

"Craig Graham" wrote:
>Someone else also mailed me suggesting checking out Keithley- I initially>didn't
because I assumed anything they had would have been shipped with the>instrument,
and the guys playing with it told me no Labview stuff was>supplied (though
there were Labview examples with my Keithley 2700 unit).>>I've looked at
the Keithley website and discovered, incredibly, that>although they have
a 2400 library, it is for Labview3 and of course can't be>loaded in the current
5.x/6.x installations.>>If they can't get anywhere wi
th the "older" stuff
I pulled from ni.com then>I'll just have to convert this v3 file up to a
current version, which is>doable since I still have the v3 and v4 installation
disks, but it's not>something I'll work on until they've tried the older
drivers and see if they>work.>>Dennis Knutson
wrote in message>news:3a38e28f@newsgroups.ni.com...>>>> I used this instrument
in a project a few years ago. I got a LabVIEW>driver>> from Keithley. Check
their web site and your local sales rep. If you still>> can't find it, I'll
try and see if I still have a copy.>>>