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New Uni-T UT61 series (UT61e+)

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spidola:

--- Quote from: rernexy on January 05, 2021, 10:51:20 am ---Soldered a breadboard jumper wire to the collector, then plugged that in to the collector hole on the hFE adapter. Connected 2 breadboard jumper wires to the base hole and emitter hole on the adapter, then used those 2 as hand held probes on the sot-89.
 :phew: :palm:

--- End quote ---
G'day, mate,  :)
You also have to know/remember the pinout and type of a transistor to connect it the right way, while a cheap transistor tester can do it all for you.
The NCV in my multimeter also works only when it directly touches a live wire.
UNI-T should have employed the full potential of the used ADC chip by updating the resolution of the multimeter from 22000 to 30000 count instead of hFE and such. ::)

nullik:
rernexy, I am not an electrician, but sometimes it becomes necessary to work with high voltage. For example, I recently did home renovations, and it was necessary to shift the wiring and add sockets. Also in the country, and in the garage.

I bought a tester with the hFe function because I need to measure transistors periodically. Cheap Chinese LCR transistor testers lie, and show different values ​​every time you turn it on and on a different battery charge. By the way, they also measure LCR crookedly and the values ​​are far from real. Unfortunately, I have not been able to check the quality of these measurements in UT61e+.


I have a Chinese AD584-M module with a voltage reference of 2.5v, 5v, 7.5v, 10v. Uni-t ut61e+ shows closer values ​​to those indicated on the calibration sheet created on the HP 3458A.
Brymen bm869s has more discrepancy in readings. Probably these calibration data are fiction and made by some Chinese tester. I doubt uni-t ut61e+ has better accuracy. But I don't have  better voltage reference at hand to check it.

UPD. I found a way how to place the hFe adapter in to the bag. After I changed the probes and put the probes from uni-t ut61e+ on to Brymen bm869s, it began to show closer values and has better accuracy. Probably Brymen soft probes have higher internal resistance due to thinner conductors for better flexibility.

Fungus:

--- Quote from: nullik on January 07, 2021, 08:08:40 pm ---After I changed the probes and put the probes from uni-t ut61e+ on to Brymen bm869s, it began to show closer values and has better accuracy. Probably Brymen soft probes have higher internal resistance due to thinner conductors for better flexibility.

--- End quote ---

Probe resistance will have no effect on voltage readings.

The meter itself has a resistance of many megaohms when reading voltage so a few ohms from the leads makes no difference.

nullik:
Fungus, I do not know why the different test leads shows different results. The difference is about 10mV.

flr:
https://youtu.be/bxluPKhyOUU

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