Products > Test Equipment
Best CHEAP LCR meter for small capacitors and inductors?
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baldurn:
What does a fixture for measuring on a VNA look like? Anyone have a link to some products or description of the procedure?
rsjsouza:
I regularly use my Reed 5001 with an adapted Keysight U1782B tweezer and it yields quite reasonable single-digit picofarads and 0.1mH measurements - all using relative mode (which the instrument calls "calibration"). However, a standing fixture like the one showed above is extremely stable for repeated measurements, especially when categorizing tens or hundreds of parts.

https://www.keysight.com/us/en/product/U1782B/smd-tweezer.html

jimjam:

--- Quote from: ranchero on November 24, 2022, 09:37:51 am ---Just ordered ET432 with Kelvin clip while Black Friday sale is going on (about $130US with all discounts). Will compare with ET-5000 when I will receive it.

--- End quote ---
Have you received it? Curious to hear your comparison against DE-5000
precaud:

--- Quote from: nctnico on November 22, 2022, 06:36:19 pm ---I did some tests with my XJW01 but it's usefull range is from -say- 10pf or from 1uH. So not a fit for the requirements for the OP.

--- End quote ---

The XJW01 needs to be calibrated at the BNC terminals, not at the end of the tweezer cable. Otherise the Open/Short routines can't and won't work, and accuracy at the extremes suffers.

My XJW is fine for small C's and L's.
mawyatt:

--- Quote from: precaud on February 11, 2023, 02:20:32 pm ---
--- Quote from: nctnico on November 22, 2022, 06:36:19 pm ---I did some tests with my XJW01 but it's usefull range is from -say- 10pf or from 1uH. So not a fit for the requirements for the OP.

--- End quote ---

The XJW01 needs to be calibrated at the BNC terminals, not at the end of the tweezer cable. Otherise the Open/Short routines can't and won't work, and accuracy at the extremes suffers.

My XJW is fine for small C's and L's.

--- End quote ---

We don't have a XJW01 but this statement doesn't make sense??

The test leads/tweezer are "part of the DUT measurement", whatever they are. The only way to remove the test lead measurement effects is to include them in the Open/Short calibration routines.

Our lab LCR meters the Tonghui TH2830 and the expensive ($5K) Hioki IM3536 require test leads/fixtures to be included in the Open/Short calibration, in fact the Hioki requires the test lead length as a parameter.

I'm sure if do a simple test of a well known component such as a 10~100pF capacitor and 1~10 ohm resistor with the instrument calibration "at the BNC terminals" vs. "with the test leads attached" you'll see the accurate results favor the test leads included calibration.

Best,
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