Products > Test Equipment
East Tester ET4410 ESR Measure
<< < (29/33) > >>
Martin72:
@The Electrician:
Yes and yes... ;)

ET4410 got 16(20 are mentioned in the spec) steps between 100Hz and 100khz.

ST2830 got 34 steps between 50hz and 100Khz.

What I´ve saw after buying the ET4410:
ET4510 allows free choosable frequencies with 1Hz resolution.. :(
Here a snip from the manual, which frequency fits in the accuracy spec.

@mawyatt:

TH and ST are absolut the same and while I´ve searched the china stores for LCRs, some remarkable thing comes up.
In several cases, when you buy more, you can give the LCR your own name...
Edit: added ST2830 frequencies
mawyatt:
@Martin,

Our TH2830 can be set to any frequency between 50Hz and 100KHz. Just connected the LCR probes to a counter and typed in 10.123KHz and got 10.122889KHz, then entered 51.987Hz and got 51.986334Hz, then entered 87.654KHz and got 87.653044KHz, 99.999KHz and got 99.997911KHz, then 99.999Hz and got 99.997995Hz. That's why I indicated this is using a DDS for the signal generation.

This must be an "undocumented" feature, as you enter the desired frequency using the "inc" and "dec" keys you step thru the predefined frequencies as you expect from the spec sheet.

However, if you use the keypad the screen will turn RED for the frequency display, even if you hit "Enter", but if you select Hz, KHz it accepts the input (as long as KHz is less than 100, and Hz is greater than 50), screen turns blue and the LCR meter outputs the desired frequency :-+

If you try MHz the meter beeps and displays a RED Out of Range Error message, same with above for <50Hz or >100KHz.

So it seems that the TH2830 can implement just about any frequency between 50Hz and 100KHz even tho the specs indicate NOT  ::)

I'll wager a brew that your ST2830 can do the same if you use the keypad technique described above ;D

Know Thomas has a TH2830, hopefully he will spot this and give it a try!!!

BTW, the DDS is likely be big cost saving difference between the ET4410 and the TH2830.

Best,
Martin72:
Interesting, will try this on monday  :-+

BTW trying, It think I will test the pansonic caps on the scope like you did.
mawyatt:
Use the Diff Amp technique if you have one. TopQuark also has an HD and has produced some stunning plots of various capacitor parameters with his Python routine which collects data from the HD Bode Plot, does some calculations and creates the plots.

Try and keep the setup tight for good results, we've run all sorts of caps from Electrolytics, Polymers, Mylar, Polypropylene, ceramic and even some inductors. The technique works well and is great for showing resonances and minimum impedances, much much better than a display number. Sure it's not as accurate as a proper LCR meter like your ET4410, and requires much more thought in usage.....Read NOT Plug-in-Play!!

However, a graph of impedance vs. frequency really shows when a device doesn't behave like a simple C, or L or R and shows where it begins to misbehave!! Since you have the tools for both, you should be all setup and ready :-+

Best,
The Electrician:

--- Quote from: Martin72 on August 06, 2022, 11:09:11 pm ---Interesting, will try this on monday  :-+

BTW trying, It think I will test the pansonic caps on the scope like you did.

--- End quote ---
Do you have any 1000 uF electrolytics other than the Panasonic one we've been measuring so far?  Do you have any other caps with capacitance slightly larger than 1000 uF, such as some 1500 uF, 1800 uF or 2200 uF?

You shouldn't be getting a phase near -90 degrees at 100 kHz with a 1000 uF cap.  It would be good if we could figure why you're getting this result.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod