# Capacitance Meter Help

1. Oct 30, 2007

### BerryBoy

Not sure where I was supposed to post this; but I think here it will hopefully get the attention of someone who can help me.

I am working on a project where I have to measure capacitance very accurately. I have been given a: ASL MODEL 1055 MANUAL DISPLACEMENT METER. But I've been, along with a colleague, ploughing through the circuit diagrams and instruction manual but cannot find out how to use the device to measure the capacitance of anything

I was hoping that someone, somewhere can send me something to help.

Sam

2. Oct 30, 2007

### Staff: Mentor

Can you post a link to a soft copy of that manual (like at the manufacturer's website)? I tried google, but no luck with a quick search.

3. Oct 30, 2007

### f95toli

Maybe I am missing something, but why are you trying to use a displacement meter to measure capacitance? AFAIK displacement meters are used to measure changes in length (i.e. displacement)
I know there are capacitive displacement meters, but I am not sure there is an easy way to use one to actually measure capacitance.

Generally speaking, if you need measure capacitance accurately you should use a capacitance bridge.
However, an ordinary benchtop LCR meter will probably be accurate enough in most applications.

4. Oct 31, 2007

### BerryBoy

Sorry, I haven't got back to you guys sooner; was a hectic day yesterday. I found someone in the University who knew how to use the equipment. It was wired wrong for measuring capacitance because the guys from the super-conducting labs had hold of it lol.

As for the instruction manual, the thing is soo old the circuit diagrams are hand drawn :tongue2:. But it measures capacitance to $1 x 10^{-7} pF$ (OMG). I need it accurate because I'm going to investigate a method of couting atoms between two metal plates (in a vacuum container) with various gases.

Thanks for the response though guys.
Sam

5. Oct 31, 2007

### BerryBoy

Yeah, we tried going onto the manufacturers website for a better copy of the manual, but they don't even list the product we're using.