Products > Test Equipment
Sensitive LCR Meter Measurements
mawyatt:
We created some crude LCR Meter plotting software in Python, here:
https://www.eevblog.com/forum/testgear/lcr-meter-plot-software/
Obviously we're not that proficient in coding, and need to spend some time wrt the UI, adding GUI would be nice, but GUI is something we've never done before. Was "hoping" some clever software types would pickup on this but never happened, so it's in our "to do list", but way down the list!!
Best,
EC8010:
You've got the tricky bit done; getting the data out of the instrument. That was done for me. But I wrote the spreadsheets that calculate impedance from the model and then allow the Solver to do the least squares fit to find model values.
I looked at your impedance plots - they're all familiar, although they go to a higher frequency than mine. ESR is pretty much constant with frequency. I think what you are seeing when it apparently increases at low frequencies is imaginary capacitance, which, being imaginary, is at right angles to real capacitance, putting it on the real plane and looking like resistance, but inversely proportional to frequency. It's in series with capacitors and quite a good indicator of the dielectric. The ideal capacitor has imaginary capacitance that is much larger than the real capacitance, thereby making its series contribution small.
mawyatt:
V5 of the Special SMD fixture PCB arrive and assembled, see preliminary results here starting at #22:
https://www.eevblog.com/forum/projects/different-type-lcr-smd-fixture/msg5600601/#msg5600601
Best
Martin72:
--- Quote from: Martin72 on July 27, 2024, 10:31:16 pm ---I have now written to them and asked for a data sheet, together with an explanation as to why.
The things look so similar, but it may well be that the cables from Sourcetronic do not come from TongHui or are “different” and are manufactured by TongHui for Sourcetronic.
We will know soon.
--- End quote ---
ST26011A 300kHz
ST26011B 5Mhz 300kHz
ST26011C 300kHz
The website will be changed accordingly.
But there will still be no data sheets. ;)
KungFuJosh:
--- Quote from: Martin72 on August 20, 2024, 06:49:15 pm ---ST26011A 300kHz
ST26011B 5Mhz 300kHz
ST26011C 300kHz
--- End quote ---
Did they note any differences between them?
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