Author Topic: 500 ppm LCR Meter at Elektor March 2013  (Read 40477 times)

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Offline kvresto

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Re: 500 ppm LCR Meter at Elektor March 2013
« Reply #75 on: April 07, 2016, 01:18:37 am »
Is anyone willing to share the micro firmware for the rest of us? Joining this Elektor crowd is a ridiculous cost. Poor old AU dollar :)

cheers
« Last Edit: April 07, 2016, 01:25:59 am by kvresto »
 

Offline fqahmad66

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Re: 500 ppm LCR Meter at Elektor March 2013
« Reply #76 on: April 07, 2016, 10:50:21 am »
..
 

Offline kvresto

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Re: 500 ppm LCR Meter at Elektor March 2013
« Reply #77 on: April 08, 2016, 01:44:15 am »
Thanks fqahmad66, this will be very useful.
 

Offline kvresto

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Re: 500 ppm LCR Meter at Elektor March 2013
« Reply #78 on: April 14, 2016, 06:35:40 am »
Hi Everyone, as my question is related I thought I wont start another thread.

I want to ask a question on this subject (disclaimer: 1st time researching on this subject). Most (all) capacitor data sheets specify their values at a test frequency of 100Khz. Most LCR meters via posts on this site use just one frequency much lower the 100k, and I assume thats because it mostly makes the hardware required cheaper? Others use 2 or 3 different frequencies like the LCR meter from Elektor, and I’m assuming the different frequency selection is for the flexibility of testing a larger range of capacitors?

Can someone who has done this sort of thing explain some background theory on this, ie why use several frequencies, how does that affect the amplitude to the measured voltage across the capacitor, and range of components under test, and anything else of interest. I’ve simulated this on LTspice and examined the results, and am getting closer to a cct I can use for experimenting.

Thanks
kvresto
 

Offline kripton2035

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Re: 500 ppm LCR Meter at Elektor March 2013
« Reply #79 on: April 14, 2016, 10:54:45 am »
100khz is the frequency you find very often inside smps, so the frequency the capacitors are most often faced to.
but I think you're wrong, main datasheets give the esr at 120Hz for the capacitors
yes build a test instrument at 100KHz is more expensive to do so lots of instruments stops at 10khz
the elektor lcr meter is one of those.

Offline fqahmad66

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Re: 500 ppm LCR Meter at Elektor March 2013
« Reply #80 on: April 14, 2016, 12:33:15 pm »
Search for 'General Descriptions of Aluminum Electrolytic Capacitors' by Nichicon..ESR dose not change much from 10KHz to 100KHz.

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Offline borjsu

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Re: 500 ppm LCR Meter at Elektor March 2013
« Reply #81 on: October 05, 2018, 04:51:27 pm »
The LCR meter from elektor 2013 has been at least tested after 5 year in the basement. It was just to put he PCB together and download the latest firmware. Now begin my problems. First it is impossible to find the Set-up and Operating Instructions documents. Where can I find it? Next problem. The stand alone front panel is not show anything. When start-up the screen show the bootloader version and then it go back to the dark side.

Everything is ok when I connect the PC.

What to do? 
 

Offline fqahmad66

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Re: 500 ppm LCR Meter at Elektor March 2013
« Reply #82 on: October 06, 2018, 03:33:40 am »
Check starting with connector. Then PCB for shorts
 

Offline borjsu

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Re: 500 ppm LCR Meter at Elektor March 2013
« Reply #83 on: October 06, 2018, 06:50:03 am »
Hello.
This was useful. I am now on board again and the display is working.
Thank's a lot for the documents.
 


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