Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

LRC meter software???

Status
Not open for further replies.

-GO- said:
vsmGuy said:
Where is this meter documented?
Click to expand...
Discussion of this meter is here https://vrtp.ru/index.php?act=ST&f=39&t=15087
Click to expand...

Thanks, but neither do I know russian nor does google translate do a good job of it.

Could you tell me if the firmware/source code is available for this from the author?

A direct link to the relevant forum post would be helpful as well!
 

seeing the schematic of this meter, I don't see how it can be a good esr meter, or with many modifications ...
it is only aimed at measuring L and C, and I dont see any resistance measurement...?
 

Kripton2035 said:
seeing the schematic of this meter, I don't see how it can be a good esr meter, or with many modifications ...
it is only aimed at measuring L and C, and I dont see any resistance measurement...?
Click to expand...

I am trying to get in touch with the author on that forum.

It being russian is a serious problem for me/us - but I believe he is working on adding an ohmmeter to it ( the ADC is free anyways )
 

Kripton2035 said:
seeing the schematic of this meter, I don't see how it can be a good esr meter, or with many modifications ...
it is only aimed at measuring L and C, and I dont see any resistance measurement...?
Click to expand...

ESR function is coming out very soon, the author is working on that part at this moment.

If you're looking for decent C/ESR meter to build right now, I would recommend another project. Photo of my meter:
 
Firmware for the project C/ESR meter.
Can be used for PIC16F873A or PIC16F876A.
Includes ASM source code, too (sorry, comments are in Russian).
If somebody will have real interest in making this project, I can create a separated topic dedicated for this project so I can help more without creating a mess...
 
Did someone build it and test it the russian LCR ?Can it be used for in circuit testing?Or can detect shorted turns in coil by measuring Q?
Thanks!
 
Hi, Gentleman!

In October 12, R2-D2 launched a new thread.

I need to post 2 times before I can post links at this forum, then...

---------- Post added at 12:44 ---------- Previous post was at 12:39 ----------

A lot of people did it! You can see the several reports on their forum. Not for "in circuit" test, sorry!

---------- Post added at 12:45 ---------- Previous post was at 12:44 ----------

Sorry, I need 2 posts for post links on this forum...

---------- Post added at 12:57 ---------- Previous post was at 12:45 ----------

Hi, Gentleman! :razz:

I can´t post links yet... I´ll try a different approach => put "http:" at the start of the links bellow!

See the new tread of the all-new R2-D2 instrument at:
//vrtp.ru/index.php?act=categories&CODE=article&article=2484

And the photo of the prototype:
//vrtp.ru/screenshots/2484_11.jpg

This new version can accurately measure very low resistences, in the 0 to 100Ω range, thanks to the KELVIN probes (note the 4 wires at the top of the picture!). And the ranges of measures was extended, too (note the measurement of the 2.200 µF ELCO on the picture!) :grin:
Despite of the Russian language, I can understand enough to repeat this building using the Google translation system, I bet all of you, Gentleman, can do it the same way! :wink:

Best REGARDS! :cool:
flavioluiz.
 
Last edited:
**broken link removed**
 

    V

    Points: 2
    Helpful Answer Positive Rating
There is another recent useful addition to the R2-D2's new project - Frequency Meter (2 ranges - 0...50Mhz and up to 3GHz - with prescaler). So, now it is pocket-sized L/C/R/C_ESR/F meter... and development is still going on - with some help from forum members...
 

Hello everyone, my 1st post to this forum ... :wink:

I intended to make 1997 Elektor LCR meter and found this useful topic. My question: did someone successfully build this device and is satisfied with it? Do you know if serial resistance (or ESR) has a good precision, i.e. able to measure ESR below 1Ω?

All parts are quite easy to find (including case, circa €40,- excluded VAT at RS), apart AD1847 which is really hard to find. One seller sells it thru eBay, but at €30 plus shipping. Do you know/recall if an ISA soundcard had this part? The other parts are cheap though, including DSP.

My main concern is ESR measurements, since having often the issue on electronic devices that includes more and more capacitors now (and having more and more defective capacitors as well ...)

R2-D2 is really an outstanding project that I will probably build (is very cheap to build, may be portable if correctly designed) but is still not finalized yet.
Furthermore, most projects, including R2-D2, measure ESR with DC currents, which may not be relevant in DC-DC supplies. Good point however is that it uses a 50mA current to measure ESR. And graphical display looks very nice!

BTW, a good idea of ESR meter is one found in Elektor (2002 for 1st project then sept. 2005 for make II), using 100kHz to perform measurements.

So, any feedback on Elektor's ESR meter is welcome!:grin:

Thanks alot!
 

I did the GO RLC bridge from proradio.ru (the hardlock version ) ,it is very acurate ( I can measure up to 5 pico, 15 miliohm or 15 microHenry ) but ONLY if the measure must is made OUT of circuit .
I ve met a lcd monitor power supply which had 2 caps,one good and one bad ,separated by a small inductance and the measured ESR was good beacause the used frequency for measure is 100 or 1000 Hz.
Now I m looking for a good 100 khz ESR meter which can measure also miliohms :grin:
 

donglejack said:
R2-D2 is really an outstanding project that I will probably build (is very cheap to build, may be portable if correctly designed) but is still not finalized yet.
Furthermore, most projects, including R2-D2, measure ESR with DC currents, which may not be relevant in DC-DC supplies. Good point however is that it uses a 50mA current to measure ESR. And graphical display looks very nice!
Click to expand...

Actually designed by R2-D2 L/C/C_ESR/R/F meter is finalized, the only
point which may confuse someone is the fact that meter was made using different schematics and somewhat different firmware.
Some parts of Schematics were designed by forum members (and I was one of them :) ), and all the firmware was designed by the Author (R2-D2).
Main difference is - some versions use 2-coil bi-stable latching relay to switch between modes (selected by button), another - "easier_to_get" regular single-coil non-latching relay.
Another difference between versions are ICs used to switch power of the blocks and corresponding signals from them. All the modes and functions are now fully controlled by CPU. So now this meter doesn't use any mechanical switches (except for power switch), which is pretty cool. You can even use your own schematics as long as control codes table of the firmware is compatible with your own.
R2-D2 is now just fixing some found minor bugs in firmware, but in general meter is working fine.

donglejack said:
BTW, a good idea of ESR meter is one found in Elektor (2002 for 1st project then sept. 2005 for make II), using 100kHz to perform measurements.

So, any feedback on Elektor's ESR meter is welcome!:grin:
Click to expand...

100KHz for measuring Caps makes the meter from Elector Electronics unusable for in-circuit measurements, as in most of cases electrolitic caps are connected in parallel with ceramic ones, which gives some extra error in measured value.
And as it is, those meters from EE have somewhat low resolution...
However, I've seen some designs similar to the one from EE with resolution of 0,0001 Ohms!
 

soptea said:
I did the GO RLC bridge from proradio.ru (the hardlock version ) ,it is very acurate ( I can measure up to 5 pico, 15 miliohm or 15 microHenry ) but ONLY if the measure must is made OUT of circuit .
I ve met a lcd monitor power supply which had 2 caps,one good and one bad ,separated by a small inductance and the measured ESR was good beacause the used frequency for measure is 100 or 1000 Hz.
Now I m looking for a good 100 khz ESR meter which can measure also miliohms :grin:
Click to expand...

did you make the go esr meter ? from proradio also... I think it measures at 100khz ...
schematics at **broken link removed**
regards
 

Kripton2035 said:
did you make the go esr meter ? from proradio also... I think it measures at 100khz ...
schematics at **broken link removed**
regards
Click to expand...

I made that one, it works fine and pretty simple to make. I did design my own PCB, though. But it doesn't measure at 100 KHz, though, it measures ESR while disconnecting CUT (Capacitor Under Test) from the source of stable current.
The voltage applied to CUT is much less than 0,5v so it is possible to make measurements without desoldering capacitors.



So,if you need any help with building that meter, I can guide you.
 

@Ruslan_Windrivers: I don't understand your sayings...
can this russian go-esr-meter measure the esr of caps in circuits ( I'm pretty sure it doesnt measure capacity in circuit...)
or are you forced to remove the cap before measuring it ?
regards,
 

I made meter according to 1997 Elektor LCR meter,and changed ad1847 to wm8731. now, I'm writing code.

But I have a question. If generated 1V sine wave,there was saturation on codec chip input,because ad620(ad8221) x10 . So i decided using 0.1V sine wave.

But the meter cann't measure 10 m ohm accuracy. And then when testing DUT,using 1.0 sine wave, testing RM using 0.1V.

Is this right? could anyone give me advice?
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top