Conductance (current) Measurement vs Time with SR830

Dear all.
I'm totally new to lock-in amplifier as well as LabVIEW. We have the Stanford Research SR830 in our lab and I want to setup an experiment to measure the conductance (or current) versus time. The conductance I want to measure is in the order of 1 nS. I have read many papers and they used lock-in amplifier for the measurement, sometime with the preamplifier. Most of the time they put a modulated voltage of frequency 10 to 100 Hz, amplitude 30mV to the drain and the source of the device. Though I am not sure how they set up the experiment.
It would be really appreciated that you could suggest me a setup for the measurement? Any other instrument is required?
Thank you very much.

Hi ncthanh1986,
I would not know how to set up an experiment with your specific piece of hardware, this might be something you would ask Stanford Research or consult the manual.
Instrument wise, the way to get the measurements from your SR830 to LabVIEW would be to have either a GPIB or RS-232 interface. National Instruments offers both of these interfaces with USB if needed.
Once you have the measurement in LabVIEW, you will be able to calculate the conductance in software.
Hope this helps!
Robert R. | Applications Engineer | National Instruments

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