2022 UNI-T UT120C Digital Pocket Multimeter Review, Why not Buy Recommended (Issues Explained,Specs)

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A 4000 counts digital multimeter with quite good measuring capabilities and internal design but serious shortcomings, particularly in terms of stability and calibration. The model was purchased in 2023 but internal markings suggest a design last updated in 2022.
Specifications:
DC voltmeter 0.4 (0.8%+3 accuracy), 4, 40, 400, 600V (0.8%+1 accuracy) ranges
20kOhms/Volt sensitivity
AC voltmeter 4, 40, 400, 600V (1.2%+3 accuracy) ranges
9kOhms/Volt sensitivity
DC ammeter 400uA, 400mA (1%+3 accuracy) ranges
AC ammeter 400uA, 400mA (1.5%+5 accuracy) ranges
Ohmmeter, 0.1Ohms to 0.4kOhms (1.2%+2 accuracy) range
Ohmmeter, 0Ohms to 4kOhms (1%+2 accuracy) range
Ohmmeter, 0.01kOhms to 40kOhms (1%+2 accuracy) range
Ohmmeter, 0.1kOhms to 400kOhms (1%+2 accuracy) range
Ohmmeter, 1kOhms to 4MOhms (1.2%+2 accuracy) range
Ohmmeter, 10kOhms to 40MOhms (1.5%+2 accuracy) range
Capacitance, 0.001nF to 4nF (4%+3 accuracy) range
Capacitance, 0.01nF to 40nF (4%+3 accuracy) range
Capacitance, 0.1nF to 400nF (4%+3 accuracy) range
Capacitance, 0uF to 4uF (4%+3 accuracy) range
Capacitance, 0.001uF to 40uF (4%+3 accuracy) range
Capacitance, 0.1uF to 100uF (5%+10 accuracy) range
Frequency meter, 0.1Hz to 100Hz (0.5%+3 accuracy) range
Frequency meter, 0.001kHz to 1kHz (0.5%+3 accuracy) range
Frequency meter, 0.01kHz to 10kHz (0.5%+3 accuracy) range
Frequency meter, 0.1kHz to 100kHz (0.5%+3 accuracy) range
Duty cycle measurement, 0.10% to 100%
Diode measurement, 0.5 to 0.8V testing voltage
-400mA fuse (non-standard, not user-replaceable)
-CR2032 battery (2.4V minimum voltage)
Average quality test leads, permanently connected
Price: around 20 EUR or 24 USD

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Опубликовано:

4 окт 2024

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Комментарии : 3

@pault6533 9 месяцев назад

mV drift without lead connected is not a defect, normal for something not grounded and especially in plastic case suspended in the air. Sometimes the manual tells you this. Connect the leads together and it goes away. I am happy with the accuracy of this unit, the ability to calibrate it manually to your own reference, including the very sensitive uA setting using VR1. However this unit does not report True RMS. The range selector on this unit is very smooth. A nice unit, but I prefer the ANENG AN101 version 2 (with Hz and Capacitance). Give it a try if you haven't already... you can buy three of them for the price of the Uni-T and it's true RMS.

@retrowikid 9 месяцев назад

Unfortunately, such a drift is not acceptable and did not happen with other models, newer or older, from different manufacturers, even no name units, so there is clearly a design issue with these ultra compact ones. There is a grounding plan on the unit, as all handheld multimeters have, so I still consider it as a fault. It is funny that ANENG meters are also made in Guangdong (Shenzen) China, as are the UNI-T products, which makes it very interesting for cross-comparisons. On the surface, the AN101 is a comparable product, probably better built than the UT120C, but is seems to have similar flaws. In terms of being a True RMS meter, I highly doubt that it is accurate enough to qualify. The AN101 still has no internal fusing, so safety is not much better. Overall, yes AN101 is probably slightly better but that does not say much.

@pault6533 9 месяцев назад

@@retrowikid Over the past few days I've paid attention to professional and personal test equipment, from Flukes to Keithleys to Anengs. Maybe I work and live in electrically noisy areas because they all drift or show offset. Connect the test leads together, it goes away, including my UT120C. Just read my Fluke manual which says "it is possible and normal for this and other true-rms meters to display non-zero readings when the test leads are disconnected from a circuit." Also so this behavior on some other RU-vid videos. So in my experience, a few hundredths of a volt showing in the display is normal when leads are dangling unterminated in a EMF or static generating environment, even on well shielded units. No, these aren't safe devices but they sure are amazingly well equipped and handy for low-power, low-voltage tasks.