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ESR for Capacitor

S

Sergey Kubushin

Jan 1, 1970
0
Is there any equipment - Brand and Model number, can measure ESR of
percision film capacitor at 100KHz?

HP 4274A.
 
M

Michael A. Terrell

Jan 1, 1970
0
Sergey said:
HP 4274A.


The Dick Smith ESR meter designed by Bob Parker. Less than $100 US.


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Michael A. Terrell
Central Florida
 
F

Franc Zabkar

Jan 1, 1970
0
The Dick Smith ESR meter designed by Bob Parker. Less than $100 US.

Bob's meter delivers an 8us pulse at 2kHz.

The "Capacitor Wizard" uses a 100 kHz 20 mV P-P sine wave.

- Franc Zabkar
 
I

ian field

Jan 1, 1970
0
Is there any equipment - Brand and Model number, can measure ESR of
percision film capacitor at 100KHz?

There is currently a discussion about ESR meters on sci.electronics.repair
with the subject line:- MAT esr meter.
 
J

Jamie

Jan 1, 1970
0
Is there any equipment - Brand and Model number, can measure ESR of
percision film capacitor at 100KHz?
sure there is, most of it was done using 1 mhz how ever.
but most of that equipment will drop to lower freqs .
you need something like a capacitive bridge that has
a Q option on it.
 
J

Jamie

Jan 1, 1970
0
Sergey said:
HP 4274A.

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I

ian field

Jan 1, 1970
0
Chris Jones said:
I think that Bob Parker's one is mostly useful for values > 1uF, so I
would
be suspicious of using it for film caps unless it is a very big film cap.
It is however very good for testing electrolytics.

I don't know about the Capacitor Wizard.

Chris

In my experience ESR hasn't been much of a problem with non-electrolytic
capacitors.
 
C

Chris Jones

Jan 1, 1970
0
Franc said:
Bob's meter delivers an 8us pulse at 2kHz.

The "Capacitor Wizard" uses a 100 kHz 20 mV P-P sine wave.

- Franc Zabkar

I think that Bob Parker's one is mostly useful for values > 1uF, so I would
be suspicious of using it for film caps unless it is a very big film cap.
It is however very good for testing electrolytics.

I don't know about the Capacitor Wizard.

Chris
 
F

Franc Zabkar

Jan 1, 1970
0
I think that Bob Parker's one is mostly useful for values > 1uF, so I would
be suspicious of using it for film caps unless it is a very big film cap.
It is however very good for testing electrolytics.

I don't know about the Capacitor Wizard.

Chris

I use Bob's meter and consider it an essential part of my tool kit.
Nevertheless it is good to know the limitations of your test
equipment. AFAICS, Bob Parker's ESR meter should read 8 ohms for
a perfect 1uF cap (it actually shows much less than this). Here is my
reasoning:

http://groups.google.com/group/aus.electronics/msg/b82fd5492cacd442?dmode=source&hl=en

Here are actual measurements:

http://groups.google.com/group/aus.electronics/msg/ed8b3fd1f1dd56d6?dmode=source&hl=en

- Franc Zabkar
 
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