Products > Test Equipment

TH2830 vs TH2832

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KungFuJosh:

--- Quote from: Martin72 on July 27, 2023, 08:47:46 pm ---12 instead of 10nH is good, better as I expected with such a "low" testfrequency.
jXL is about 6mOhm - What Rdc have the coil ?

--- End quote ---

What's jXL?

Martin72:
XL is the reactance of the coil:

XL= 2*pi*f(Hz)*L(H)

KungFuJosh:

--- Quote from: Martin72 on July 28, 2023, 02:26:36 am ---XL is the reactance of the coil:

XL= 2*pi*f(Hz)*L(H)

--- End quote ---

What's the j?

How did you get 6mΩ?

If XL= 2*pi*f(Hz)*L(H), then isn't it:
2 x Pi x 200000 x 0.000 000 012 = 0.01508? Or 15.08mΩ... My DCR was 130mΩ, I assume that's due to the fixture or correction being off or both?

Martin72:
Ah, I took 100khz and 10nH , my fault, it was late...

"j" stands for imaginary, we can omit this.

nctnico:

--- Quote from: mawyatt on July 25, 2023, 02:22:21 pm ---One of the benefits (not usually mentioned) of these LCR meters is the lower Z ranges, like DCR at 1 Ohm and ACR 3 Ohm ranges, where the DUT current can be as high as ~67ma. These ranges are below most quality DMMs like the KS34465A (100 ohms) and DMM6500 (10 ohms).

--- End quote ---
That statement may not be true as the 6.5 digit DMMs you mention have a lot higher accuracy compared to an LCR meter and you might be operating the LCR meter outside the range where it is most accurate when measuring low resistance values.

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