Products > Test Equipment
New UNI-T LCR meter? UT622
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Messtechniker:
The UT622C and UT622E come with Kelvin clips and can do 100 kHz.
The UT622A does not come with Kelvin clips and can only do 10 kHz.
Just doing some inductance stabiliy measurements on a 3.3 uH inductor.
Currently reading 3.403 uH with the last digit being stable.

Messtechniker:
Further measurements on the 3.3 uH indictor:

ZhuraYuk:
So I tried to read STM32 firmware with my cheap ST Link V2 copy via SWD and failed, the error is the same - chip is read protected, however I was able to see the Option Bytes and it says that chip is only write protected and can be read.

So, does anyone have good programmer with JTAG? Maybe it will success reading the firmware and posting here? Below I attached JTAG pinouts for the motherboard.
shapirus:
Is UT622E still a good value at $270 minus the $40 discount with the currently active Aliexpress anniversary sale (as long as there's something else in the cart to help it make a total of $299 before discount)? That'll mean $230 for the meter, including shipping.

I don't exactly require a(nother) LCR meter, as I already have a YR1035 for milliohms and Shannon tweezers ST42 for LCR measurements, but: a) a sale is a suitable time to satisfy GAS; b) I think it'd be nice to have a second LCR meter in addition to the ST42 to serve as a sanity check reference: if both meters show the same readings, then most likely both are fine, but if they do not, then you'll have a nice excuse to buy yet another one to check which of the two is off.

The new meter must be able to do everything the ST42 can do (including voltage output below the diode threshold, and that includes Schottky diodes too -- so must have 0.1 Vrms or less mode) and more, considering the price and size. Just how much more, I'm not really sure. Is 4-wire measurement beneficial for inductance and capacitance? If yes, then it must be so for lower ranges, like about sub-uH and sub-10 pF -- how good will it be at these?

I did read the Hantek 1832/1833C thread... Wasn't impressed for some reason. It just seems lacking in the overall quality, including customer support. Someone mentioned the UT622E, and it looks like a better product.
Messtechniker:
Been using it a bit lately.
What I am missing occasionally is DC capacitance measurement
for comparison with the specs printed on those lytics.
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