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East Tester ET4410 ESR Measure

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mawyatt:
Yep, just a quick setup and test. Here's couple of plots for a 100uF and 10uF Polymer types, they agree with TH2830 as 95.19 (97.73uF) @ 100Hz and 9.16 (9.76uF) at 1KHz. Note these plots only go to 1MHz to stay within reason for the kludge setup involved.

If Siglent is "listening", this has demonstrated that the SDSX + and even better SDSX HD are capable of generating useful Impedance Plots. If they had the ability to plot a Resistance scaled Y axis then the display would be in dB ohms, and with the ability to do a short open calibration and utilize such in the display. Add to this the ability to "plot" various computed parameters (C, Z, Y, D, Q, ESR) within the Bode Function, well you see where we are going  ;D

With this we could add a quality test fixture with selectable ranges (we know how to do this!!) and you now have a wideband Impedance Analyzer of decent performance  ;)

Maybe Siglent is listening ::)

Best,

Martin72:

--- Quote from: The Electrician on August 03, 2022, 12:28:03 am ---Martin72,

Would you please post a photograph of the fixturing or Kelvin cable you are using to make measurements of your ET4410 and the meter at work?

--- End quote ---

Hi,

Did it, the last measures were all taken with the kelvin cables.
Then I remember I got the fixture also and repeated the 100Khz measure today at work and at home.
Will do a little table with the results of yesterday and today, post it when finished.
There are remarkable differences between fixture and cable.

Martin

The Electrician:

--- Quote from: Martin72 on August 03, 2022, 08:45:03 pm ---
--- Quote from: The Electrician on August 03, 2022, 12:28:03 am ---Martin72,

Would you please post a photograph of the fixturing or Kelvin cable you are using to make measurements of your ET4410 and the meter at work?

--- End quote ---

Hi,

Did it, the last measures were all taken with the kelvin cables.
Then I remember I got the fixture also and repeated the 100Khz measure today at work and at home.
Will do a little table with the results of yesterday and today, post it when finished.
There are remarkable differences between fixture and cable.

Martin

--- End quote ---

I had just about decided that your unusual measurements were due to using cables.  Can you make measurements on the Panasonic 1000 uF cap at 120 Hz, 10 kHz and 100 kHz on both the ET4410 and at work on the ST, using the fixture?

Martin72:
Can do.
"Unsual"...I guess you mean the 100khz measures, at 120hz both measure the same.
(For other readers who ecventually wondered why I use only the ET4410 and the ST2830, the keyysight handheld LCR, expensive and calibrated, measures on 100khz complete BS)

indman:

--- Quote from: The Electrician on July 30, 2022, 12:55:06 am ---They look this: https://www.ebay.com/itm/193196126203?hash=item2cfb62effb:g:FLgAAOSwZL5dwu1n
but mine are .5 uF

--- End quote ---

Thank you, these are very high quality styroflex (polystyrene) K71-7 capacitors. I keep them in a separate box, but I don't have the 0.5uF rating. I took a slightly lower value of 0.15uF for comparison and the results on the DE-5000 are very close to yours from post #68. I have shown in the screenshots the results of measurements using the software Hand-Held LCR for De-5000 at 1kHz and 10kHz. These pictures show that the DE-5000 can display more useful information than it has on the display and more high resolution for Q,D and other. ESR(Rs) at 1kHz is very unstable and fluctuates a lot, so I only showed 10 and 100kHz.


--- Quote from: The Electrician on July 30, 2022, 07:51:42 pm ---These two meters are quite a bit more expensive than the DE5000, but they perform much better.  The DE5000 performance is not bad for $100, but isn't there some old saying about getting what you pay for?

--- End quote ---
Everything is relative in this world, right? For me, $100 is not such a small amount. I have a Chinese LCR XJW01 with a price of $30 and I would not say that it is 3 times worse than the DE-5000. I also have an LCR measuring attachment with a computer sound card, which in Zmeter can draw similar Bode graphs and almost for free. Yes, there is a limit on the upper limiting frequency of 10-20 kHz. Therefore, if I buy an ET4410, which is 3 times more expensive than a DE-5000, this again does not mean that I will have a meter 3 times better in quality.

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