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| LCR meter opinion |
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| indman:
--- Quote from: Martin72 on January 25, 2022, 08:13:57 pm ---The U1733C shows the behaviour the DE5000 should have, according to the other thread. --- End quote --- If you look again at my measuring results and also pantelei4,you will see that problems with DE-5000 starts close to the 2μF margin. |
| Martin72:
Therefore I wrote, I´ll test further with greater values. |
| T_guttata:
I'm also currently looking for a reasonnably priced LCR Meter where you could possibly also measure small resistances (4K probes). In the range of $200 there are more options around. Did you have a look at the Peak Tech devices? https://www.peaktech.de/uk/Products/Electrical-engineering/LCR-component-tester/LCR-meters/ There are several options starting at about $50. I have a power supply from Peaktech. The biggest difference seems to be the range of capacity and inductivity. |
| nctnico:
--- Quote from: Martin72 on January 24, 2022, 10:41:36 pm --- --- Quote from: Martin72 on January 19, 2022, 09:52:09 pm ---Will take my DE5000 to work and test the 100khz against our two calibrated LCRs. --- End quote --- So I did today, but there was a strange thing that got me stop so far for further investigation. At work we got a handheld calibrated LCR, keysight 1733C, and a stationary from sourcetronic. DUT was a cap, a special one for snubbing from wima, 1µF. First step was cap measure in itself. Measuring with the sourcetronic, cap was 1.001µF at 100khz. Keysight measured 0.993 µF. DE5000 measured 0.950µF. So far so good, but.. Keysight and DE5000 uses the alligator clip thing with short wires, the sourcetronic got kelvin clamp leads. But for the sourcetronic we also got a test fixure with very short ways. When I´ve used this thing, sourcetronic will measure....0.950µF. So what to choose...must think about it, then repeat the measures from today, post them here. --- End quote --- I assume you have 'nulled' the wires & test fixture before making the measurements? At higher frequencies it is important to cancel the offsets introduced by the wires / test fixture of an LCR meter. |
| Martin72:
Yepp. Today afternoon a test with an wima mkp10 cap, 2.2µF: 1Khz: U1733C ST2830 DE5000 2.102µF 2.103µF 2.103µF D0.001 D0.000 D0.000 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, next test perhaps with a 3.3 or 4.7µF - although it makes no sense at 100khz because of the high cap value. |
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