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/