Products > Test Equipment
LCR meter opinion
ogden:
--- Quote from: nctnico on January 29, 2022, 06:18:46 pm ---
--- Quote from: ogden on January 29, 2022, 05:20:22 pm ---Application? :-// It does not matter - opponent can't read on purpose or not, I am out of such kind of discussion. GLHF
--- End quote ---
Now you are being silly.
Back to the core of the discussion: Are you seriously going to suggest that a reading which is several 100's of percent off from what is expected (based on what the test equipment is capable of) indicates that the piece of test equipment is unsuitable (despite it's specifications saying it is) and not a case of user error?
--- End quote ---
You are wandering all over the place. When we are talking about assured performance of *capacitor* at higher frequencies - we were talking about *capacitors*, not about equipment capabilities.
nctnico:
I'm following your lead. You came up with 'assured performance' which I countered with the hint that you'll need to use a component that is fit for purpose anyway. But maybe you missed that hint.
Anyway, if your beef is with capacitor specs: in general the specifications for capacitors leave a lot to be desired and in many cases you have to look further than just the datasheet. Capacitor datasheets just provide a few data points from which you can determine the performance over a wider range based on construction and dielectric. For example: the datasheet for MLCC capacitors typically doesn't specify the leakage current. But this isn't zero and for some circuits this leakage is not insignificant. You'll need to dive into the properties of the dielectric to get a ballpark figure (and perhaps measure a bunch of samples). So yes, an LCR meter is an important tool to measure components to supplement information that is not in the datasheet.
Martin72:
--- Quote ---and in many cases you have to look further than just the datasheet
--- End quote ---
But not with those instruments we´re talking about and not in "many cases".
It´s always the same when you´re "on stage". ;)
Nect week I´ll continue testing between the three LCRs and several caps with values between 47nf and 4.7µF.
In the table, I´ll put the dissipation factor sheet vs measuring, when it´s possible because of the limited resolution of the keysight and DE5000.
Btw., is a schmematic of the DE5000 known/ avaible ?
nctnico:
Before taking any more measurements: check the Kelvin clips and connectors for damage and do an open / short offset calibration after changing the measurement frequency. You should not get any readings which exceed the LCR meter's accuracy specification with those capacitors.
ogden:
--- Quote from: nctnico on January 29, 2022, 06:53:53 pm ---I'm following your lead. You came up with 'assured performance' which I countered with the hint that you'll need to use a component that is fit for purpose anyway. But maybe you missed that hint.
--- End quote ---
What would "if you want *assured* performance at higher frequency than your capacitor specified at, you are using wrong component" mean, huh? Whatever you are smoking - you shall consider to quit.
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