Products > Test Equipment

LCR meter opinion

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oz2cpu:

--- Quote from: mawyatt on January 25, 2022, 07:30:37 pm ---The SourceTronic 2830 looks like a rebranded Tonghui TH2830.
Best,

--- End quote ---

I own a TH2830, dont see any difference, please post more details about the ST2830
price ? where to purchase ?
the info screen ?

Martin72:
Hi,


--- Quote from: Martin72 on January 25, 2022, 08:13:57 pm ---We got it from here:
https://www.sourcetronic.com/shop/en/lcr-meters/

--- End quote ---

indman:

--- Quote from: Martin72 on January 26, 2022, 07:06:02 pm ---10Khz:           
2.105µF            2.106µF       2.104µF
D0.018             D0.000        D0.000
100Khz:
2.351µF            2.389µF     2.121µF
D0.232             D0.015       D0.081
Still nothing to worry
--- End quote ---
I strongly disagree, there is reason for concern, because the difference in the results for U1733 20 times, for DE-5000 - 80 times!

nctnico:

--- Quote from: indman on January 26, 2022, 07:46:03 pm ---
--- Quote from: Martin72 on January 26, 2022, 07:06:02 pm ---10Khz:           
2.105µF            2.106µF       2.104µF
D0.018             D0.000        D0.000
100Khz:
2.351µF            2.389µF     2.121µF
D0.232             D0.015       D0.081
Still nothing to worry
--- End quote ---
I strongly disagree, there is reason for concern, because the difference in the results for U1733 20 times, for DE-5000 - 80 times!

--- End quote ---
You have to check the specs for the LCR meter. The accuracy depends greatly on the test frequency used. This has everything to do with the signal amplitude across the DUT at the test frequency. For example: a large capacitor has a lower impedance at higher frequencies so the voltage across a capacitor is smaller. In turn this means the accuracy becomes lower.

Still, the measurement results for the ST2830 at 100kHz should be much closer to 2.1uf; something is wrong here.

TimFox:
The three meters agree tightly at 1 kHz on the nominal 2 uF part.
At higher frequencies, a bit of stray inductance in the test connections (not properly calibrated by the short correction) will affect the readings:  series inductance (including the self-inductance of the part) leads to an increased measured capacitance at higher frequency.

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