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LCR meter questions and maybe recommendation.
indman:
--- Quote from: Martin72 on June 03, 2024, 09:43:04 pm ---But you have to make things clear and one thing is that the ST42 (in my eyes) is not enough to cover everything, but that is exactly what is always suggested.
--- End quote ---
Totally agree with this opinion. I have ST42 and it is a convenient and good tool when you need to quickly find out the parameters of SMD parts.
But it has, along with its advantages, also a number of limitations. For example, the upper operating frequency of the test signal is limited to 10kHz, unlike the DE-5000.
Shannon has promised to release a 100kHz tweezers, we will wait for it. The HB15(16) smart tweezers, which were sold in the Russian segment, has an upper operating frequency of 250kHz test signal, which significantly extends its range of application. Yes, it costs twice(3) as much as the ST42, but it has twice(3) as much capability. The analog of this smart tweezers in your market is labeled LCR Reader-R2. https://www.lcr-reader.com/r2.html
;)
indman:
--- Quote from: rwgast_lowlevellogicdesin on June 04, 2024, 01:25:33 am ---I didnt know the de5000 had an app, i dont mind using an app to see all that extra info.. im going to look in to it a little more, the screen shots of that app make it look like the best bet. Do i need to buy/make an ir thing to use the app or can will it work via USB?
--- End quote ---
Check out this thread https://www.eevblog.com/forum/testgear/is-the-de-5000-software-useful/ ;)
coromonadalix:
for theses lcr prices and ranges, the DE5000 is more than enough, mastech have one based on the same ic's but more expensive
hantek have 2 models, you have some TE430 series, some Keysight, Uni-T and many low mid models etc ...
all of theses will do a good job up to 100 khz
higher than that you need bench based ones .... and you know the price will rise fast
and yes some of them have control sw for them ....
special cases like Sencore LC-102 103 can output up to 1kv for capacitors, but their prices are oooooff no SW for them
happy with an DE-5000 with open and short calibration on each power up ...
but if you did really write milli hertz ..... that's another story
shabaz:
If the requirement is to measure at 100 MHz, then there's always the VNA. The accuracy is in a far more restricted measurement range, but at least it's affordable. Obviously doesn't replace a high-end (tens of $k) LCR meter. Another bonus being that if desired you could test the inductor in a bigger network as it will be used, e.g. filter, etc., rather than a component in isolation.
The set-up time with the VNA is long, but it would equally also take time setting up a decent measurement with LCR or impedance meter. They all use fixtures and require nulling-ing out/calibrating, etc, for accurate results. LCR meter short/open procedure can take ages across the frequency range.
Example screenshot shows a DIY wirewound inductor measurement (approx 400 nH) with a VNA, the dot shows the measurement at a spot frequency, and you can also see the resonant frequency.
Back to the accuracy, sometimes that's not actually needed, as long as the circuit is tunable, and just as important (or more important) might be checking the ballpark at a frequency, and then measure the overall response or output in-circuit, with VNA or sig-gen, 'scope, etc.
chilternview:
Also if you're measuring at VHF, you could look at the HP/Agilent 4396B. It's always puzzled me why these weren't more popular, as not only are they a VNA, a spectrum analyser but also an impedance analyser. In the last mode, you can measure L,C,R,Z,theta, D, Q etc vs frequency from 100KHz to 1.8GHz. And also extract equivalent circuit parameters, e.g for an inductor not only the L but also series R and parallel C.
Obviously for non-RF applications the bench LCR meter is going to be easier to use and more accurate, or handhelds like the DE-5000 for quick less accurate checks, it all depends on what you're trying to measure.
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