I want to trigger a keithley485 picoampere, conected to labview 6 through a USB/GPIB cable (82357B-AGILENT), with a usb signal coming from an spectrometer

[Pirri mason]

I´m  new and it cost really time. I found the drivers for keithley here but I could only se version6 and I don´t find them complete. The thing is I can already comunicate with the instrument from Agilent interactive I/O and conetion expert. I even created there an alias for the visa, but I don´t know how to go on. I do not now how to iniciallizate and construct the whole program. I have though an idea, and I could also buy version 8 if its really necesary. but i need some subIV like those for the HP34410 that already exist in Labview. thanks in advance for your suggestions.

[AndreasStark]

Hi Pirri,

you have two options controlling your Keithley 485:

1. PnP Instrument Driver http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=345, only available for  LabVIEW 7.0+

2. Program the driver VIs yourself. Take a look at the GPIB examples. Command Reference and programming model for the 485 can be found at:  http://www.keithley.com/search?searchType=general&SearchableText=4853

Upgrade LabVIEW: http://ohm.ni.com/advisors/ua

[Pirri mason]

naja, das problem is both existing drivers are not so consistent (not to say they are a crap). there is no inicialization and I need a visa path because I use a USB. also the NI visa should be more than 3.5 for beeing compatible with USB. I have desisted but thank you

[Dennis_Knutson]

Since the Keithley driver was written by Keithley, you should send your concerns about it to Keithley. You can also modify the driver yourself. Replace the GPIB Read/Write functions with VISA Read/Write and wire appropriately. More tedious than difficult.