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VI Diagram Using Current Source and Nanovoltmeter

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Posts: 31
Joined: October 14th, 2014, 2:59 am
Country: India

VI Diagram Using Current Source and Nanovoltmeter

Post by vaibhavinegi » October 31st, 2014, 4:18 am

I am novice research scholar and using labview with keithley Instruments to read and draw characteristics.
I am using 224 Programmable current source and 181 Nanovoltmeter. Instrumentation setup is fine and both device working properly.
But Nanovoltmeter is unavailable in NIMax.
How can I read data from both device simultaneously to draw a V-I Diagram from a given resistance.

Please help me how to draw the VI.
Vaibhavi Negi
Research Scholar
Delhi; India

Dale C
Keithley Applications
Keithley Applications
Posts: 2847
Joined: June 10th, 2010, 6:22 am
Country: United States

Re: VI Diagram Using Current Source and Nanovoltmeter

Post by Dale C » October 31st, 2014, 7:39 am

Both of these units are obsolete.
They respond to the old Device Dependent Commands (DDC).
This means T for trigger, R for range and so on.
They both have GPIB as a communication bus.
One thing to remember, the command string will not be processed until the X character is received.
There are no example programs available to control these two particular instrument together.
You will have to write a program to set a current on the 224 and then take a reading on the181.
Do this in a loop to get an IV curve.
hope this helps.

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