AC or DC measurement you need?

Try a Capacitance bridge first. There are existing instruments so-call AC
capacitance bridge that can do this. Or you might need to build a bridge by
yourself.

Jie

On Thu, Sep 24, 2009 at 12:11 PM, Zhang, Sheng wrote:

> Folks,
>
> I was wondering what's the usual method to measure a capacitive sensor? I
> need to measure capacitance of ~2pF to ~6pF accurately in the order of 0.1pF
> (or even more accurate).  Probe stations usually introduce parasitic
> capacitance in the order of 100pF...
>
> Also, how to bond the sensor to the test fixture is another issue.
> Currently I use silver epoxy and thin wire to connect the sensor to a RCA
> plug. That severely compromised the repeatability since I need to make the
> connection everytime by hand..
>
> Any suggestions?
>
> Thanks,
> Jason

*  Zou Jie (Jay)
*  Department of Physics
*  University of Florida
*  Tel: +1-352-846-8018
*  Email: zoujiepku@gmail.com
*  Homepage: http://plaza.ufl.edu/zoujie/