ESR meter again...

[zaoka]

From all of the schematics available online does any have large scale from 0-1R?? This is most important measurement range and most of the schematics are built so that 0-1R range takes only 5% of the full analog meter deflection...

I would love to build one meter that has 2 ranges:

0 - 50R
0 - 5R

This way we can test those 1000uF and up with accuracy.

 

[Psi]

probably not the answer you were looking for but personally id buy one rather than build one. I'm not really a fan of building test equipment when a bought one is available at a good price and is likely to be better anyway.

Having said that, you do learn a lot from making your own gear so if thats the goal, go for it.


If i needed one id probably buy this for ~ US$129 + $12pnp
(I'm quite pleased with my LCR and component tester from them)

http://www.peakelec.co.uk/acatalog/jz_esr70.html

• Measure capacitance and ESR.
• New enhanced dynamic range of 0.00 to 40.0 ohms.
• ESR Resolution as fine as 0.01 ohms
• Supports capacitors from 1uF to 22,000uF.
• Capable of In-Circuit measurement of ESR.
• Polarity free, connect any way round.
• Great for low DC resistance checking too
• Protected against highly charged capacitors
• Tests at the industry standard 100kHz.
• Automatically carries out a controlled discharge procedure

They also make a cheaper one for US$109 which only goes to 20R instead of 40R
http://www.peakelec.co.uk/acatalog/jz_esr60.html

[tjw]

Hi,
    have you seen Bob Parker's ESR meter ? Have a look here http://members.ozemail.com.au/~bobpar/

It uses a Zilog Z8 MCU and is a top class product. Full schematic and a description of the circuit operation is supplied with the kit. Bob has a lot of information on his site about the meter and how to use it.

I have built one and prefer it to a commercial unit since I can fix it if there are problems and I learnt something along the way.

I recall that these kits were being sold in the US a few years ago, but cannot remember who was selling it. In Australia you can get it here http://www.altronics.com.au/index.asp?area=item&id=K2574


Regards, tjw.

[tyblu]

Great link tjw

[Zyvek]

If i needed one id probably buy this for ~ US$129 + $12pnp
(I'm quite pleased with my LCR and component tester from them)

http://www.peakelec.co.uk/acatalog/jz_esr70.html

I have this meter and I'm pretty happy with it, I also considered the Blue ESR  Bob Parker meter as well, but I liked the extra bells and whistles the ESR70 provided. I'd love to see a head to head comparison.

[Psi]

I have this meter and I'm pretty happy with it, I also considered the Blue ESR meter as well, but I liked the extra bells and whistles the ESR70 provided. I'd love to see a head to head comparison.

i think you mean the other purple one that's a little cheaper, the blue one is the component tester for testing transistors fets diode leds etc..

I have the yellow LCR and the blue DCA and i may get the purple ESR70 and red SCR at some point in the future.

[Zyvek]

i think you mean the other purple one that's a little cheaper, the blue one is the component tester for testing transistors fets diode leds etc..

I have the yellow LCR and the blue DCA and i may get the purple ESR70 and red SCR at some point in the future.

Doh, Sorry for the mix up, I actually have the ESR70 (Purple) , the DCA55 (Blue) and the LCR40 (Yellow) meters.  I'm happy with all three, even if I can't keep the model #'s straight.

[zaoka]

I want to build analog meter, I found it better than digital... Its faster to work with.

The reason I want to build one is because I want to make it with a large analog instrument, the ones you can buy are all with small instrument.

I bought MUL3333 but its 0-1R measuing range is so small.

Looks like a people who have no expirience in repairing stuff are the one who design this kind of stuff..