I bought this Hong Kong jobby off ebay some time ago. I think I paid under $40.00 This one is going for $37.00Can
Great for inductor making. And to measure chip caps when I get unmarked chip capacitors mixed up.
There are model variations. Rev 3 and Rev 4. Rev 4 has an extra button for large C.
I put a scope on the LC test leads. Sine wave. The LC meter measured my scope capacitance at 7pF.
I'm wondering if anyone else has bought this LC meter.
D from BC
In the States, $30..00 + $10.00 shipping
Wow, a 32-bit CPU on it too!
I don't believe for one second, though, that their measurement accuracy is
1% -- particularly at the low end of their ranges (10 FEMTOfarads / 1 NANOhenry). ...And you certanily need a lot better "fixturing" than a couple of alligator clips if you're trying to get any repeatibility whatsoever down in that rnage.By hey, for under $40, one can't really complain if the the specs are slightly fictional. :-)
It looks like the standard "build an oscillator [we supply one of L/C, you supply the other], measure the frequency, calculate the L or C." This becomes inaccurate for low-Q components, though, unless you also measure their resistance and "subtract it out," so-to-speak.
---Joel
Yeah.. Wiggling the test leads results in picos of variation when measuring capacitors. Pro RCL meters have a component jig. I could make one.
I tested a ~100.4uH inductor and the last digit slowly dropped. I suspect I warmed up the core during winding and the core was cooling down during the test. Or maybe the meter is drifting.
I tried to measure the capacitance of a through hole carbon film resistor. A low Q test. The meter reported a bogus capacitance.
Their 58 nH for that four-turn inductor is quite plausible though--I eyeballed the dimensions and got ~45 nH.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal ElectroOptical Innovations 55 Orchard Rd Briarcliff Manor NY 10510 845-480-2058 email: hobbs (atsign) electrooptical (period) net http://electrooptical.net
Gee, I'd buy it for the display alone.
Cheers
I thought the standard was to do that, but also switch in and out a small stable capacitance, which enables you to calculate a lot more accurately. That's what my kit version previously discussed does.
On a sunny day (Mon, 6 Dec 2010 22:40:25 -0500) it happened "Martin Riddle" wrote in :
Those displays are < 4 Euro retail here in quantities of 1, say 5.5 USD.
We can get the 2 line LCD, in quantities for about the same $5 range. But for a single piece....
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