Products > Test Equipment

LCR Tweezers test and analysis (HP-990, DT71, ST5S...)

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indman:

--- Quote from: Shannon on February 15, 2021, 06:47:55 am ---Disadvantages:
1. A little expensive
2. The structure design is the best LCR tweezers I have ever used, but there is still a gap between real tweezers
3. Although it is very accurate, it does not support self-calibration, which may be a disadvantage

--- End quote ---
Another disadvantages is that it does not have a test frequency of 100 kHz.
Tweezers of similar cost have such an option. ;)

2N3055:
I have LCR Pro1. It has self cal, diode mode that can light up LEDs, DC resistance mode...
Goes to 100kHz, has setable voltage levels from 0,2 to 1 V and is a proper impedance analyser.
Works well, and is quite accurate, form what I could verify..

As Tautech says, if I need to measure LCR, (SMD or not) it is first thing that I grab... It's just so convenient and easy...

If it breaks, I would get another one quickly.

indman:
2N3055,can you make a video of how your tweezers work when measuring low impedances?
I am interested in the stability of the readings of this device. 2-wire measuring circuit for tweezers! Stability 4 digits after the decimal point is a random number generator!

bateau020:
As I have the same tweezers (LCR pro1 plus), I can chime in. These tweezers are really stable when the device under test is not ambiguous. Sometimes you have to force it to C or L tests, but in general, the tool is very reliable, versatile and fast. I prefer it over my DE-5000 clone.
Attached is a video of the tweezers on a 1 ohm resistor. (in a zip, don't know how to quickly add a video outside of pushing it to youtube or the like)
As you can see, some noise, but not too bothersome.

indman:
bateau020,there is no noise on your video, but a random number generator in the last 2 bits. ;)
Can you measure the resistance with 10-20 milliohms with your tweezers?

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