| Products > Test Equipment |
| 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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