current and voltage measurement using 6517b

[shasastro]

hi 

i have kethily 6517b with GPIB 488 ...having labview 8.5... but i dont know how to measure diode characterstic ...can any one send labview program r any other option to measure current and voltage with source voltage...kindly any one help with d details

regards

sasikumar.l

[Albert.Geven]

a diode characteristic is measuring the current as function of voltage or even better the voltage as function of the current.

so did you download the driver for the 6517a (probably good enough for the B) and look at examples?

[NathanT]

Here is a link to the Keithley ke6517 LabVIEW Instrument Driver.

-NathanT

[shasastro]

thanks a lot.. but i need actually I-V characterstic program.. (ie,want to measure current for given source voltage)so i need a labview program for I-V characterstic....can u pls help me in tat...

[Dennis_Knutson]

The driver is old, unsupported, and only has a simple example. I'm not very familiar with this particular model but the manual describes how to source a voltage and measure a current. I would suggest you first perform a manual test and then see what commands are necessary to reproduce that. Once you have a single test working, it should be simple to ramp the voltage and take a series of current measurement.

[shasastro]

i got d readings manually.. taking 10 to 50 readings s possible manually more than 100 means v need a program right..tats y i need some sample prb..

[Bandan]

Hi shasastro

I have attached a library of VI's below which work with 6517b

read-visa.vi

reads data from buffer. Specify your GPIB as the resource and start reading the data. You can control the duration 'dt' which is the time between write+read operation of VISA API's.

VISA-Inititialize.vi

This lets you initialize your VISA API's for kind of interface you're working on through a property node. In your case it is GPIB , which I have made it to be default.

VISA -Write through OPC/LF.vi

Lets you write to your device (Keithley 6517b)

However I see you might need voltage-sweeping in your case , for plotting diode characteristics.

Please use the Sweep_code logic attached for the same purpose.