Make a very simple ESR meter.

Thread Starter

bob2

Joined Jun 15, 2019
213
Ultra Low ESR meter.
Zero on the right.
The countdown is in large divisions of the upper scale.
CapXon 1500uF 25v.
ESR-0.004Ohm.
 

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Thread Starter

bob2

Joined Jun 15, 2019
213
He measured pH when he was in a medical device. And so it is a normal microammeter.
Now the measurement in Ohms, as in the diagram.
;)
 

Thread Starter

bob2

Joined Jun 15, 2019
213
What capacitors do we have the ability to measure?
All electrolytic capacitors in the Low ESR group.
Polymer and solid polymer capacitors Low ESR.
Here are some types of electrolytic capacitors.
Nichicon HZ
Rubycon ZLH, MCZ
Sanyo ME-WG
Chemi-con KZ
CapXon LZ
Samxon GA
OST RLX
 

Thread Starter

bob2

Joined Jun 15, 2019
213
Now you can absolutely confidently decide on the actual value of ESR and the use of a capacitor when replacing, for example, on motherboards.
New Capacitor. CapXon LZ 3300uF 6.3V.
ESR-0.0055Ohm.
 

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Thread Starter

bob2

Joined Jun 15, 2019
213
This is the main feature of this ESR meter.
Measurement of real ESR.
Reliable results when there is no datasheet.
Selection of capacitors for the lowest ESR.
 

Thread Starter

bob2

Joined Jun 15, 2019
213
In-circuit measurements.
Test voltage-50mV.
Used high quality gold plated tips.
Polymer capacitor 100uF.ESR-0.008Ohm.
 

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Thread Starter

bob2

Joined Jun 15, 2019
213
Now I have the opportunity to check the measurement results using the LCR Pro1 Plus.
The contact resistance of the switch is 1.5574mohm.
Everything is fine.
I will add some information about the ESR meter.
Full scale 0.0005-0.5ohm.
Resistors R5, R6-0.035ohm.
In order to show the least measurable resistance, I had to measure what was at hand. A piece of thick copper wire.
Resistance 0.5mohm.

 

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