Hello everyone,
I'm looking for LCR Tweezers since some times ago.
I have posted a first message on the other topic here
https://www.eevblog.com/forum/testgear/lcr-tweezers-test-and-analysis/msg5234478/#msg5234478I found that the Russian version is very good, but seems to be impossible to buy one outside (english is inside the firmware).
Thanks to @Tautech
, I discover this ST42 tweezers, and read full topic + looked at all review I found on Youtube.
It seems to be a great tool and I think I'll buy it !
But, as I plan to use it also to check some low R value (current shunt resistor), I see that there is always a little drift on milliohms measurement.
So I don't know if this suggestion is still in development/optimization ?
https://www.eevblog.com/forum/testgear/design-a-new-precision-lcr-tweezers/msg4871915/?topicseen#msg4871915Also, I saw some other suggestions I think that will be great additions to use it without looking always at the screen:
> Diode mode:
- Short beep to tell good diode value
- Double short beep for schottky
- Continuous beep for dead diode
> Resistor mode:
- continuity beep with low R value
Thank you !
Here is the original post:Apologies if this has been covered previously (some quick searches in the thread didn't come up with anything similar), but would it be possible to add a REL/delta/NULL function for the resistance measurement?
I am trying to measure resistance in the milliOhms range and, even after doing a Short calibration, the tweezers are still displaying some 20 or so milliOhms with the probes shorted.
Thanks!
Hi giosif,
Thanks for your suggestion.
Yes, we have tried to make the short cal result in zero, but we did not have much motivation to finish this optimization.
Cause the 20milliOhms is the limitation of the tips contraction and ST42, and we have discussed one option is to use a "<30milliOhms" to replace the test result,
This way to show the result to users may be more reasonable.
Do you have many test cases that need a smaller range, which can be used for milliOhms measurement?
We are trying to design real four-wire measurement tips, but the user experience is not as good as the normal tips.