| Products > Test Equipment |
| New (toy?) DSO+LCR meter - Fnirsi DSO-TC2 (june 2022) |
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| Aldo22:
These gadgets are kind of cute, but somehow they don't make much sense imo. Can the DSO-TC3 still not measure ESR? I bought a DSO-TC2 a while ago and wouldn't do it again. Well, it's relatively fast in tester mode, that's about the only advantage. Comparing the oscilloscope part, a $62 DSO1511G is a Rolls Royce, if only for the ease of use. An LCR-TC2 for $15, which can also measure ESR, fits in with this. OK, that costs a bit more overall, but not that much. Add an AN8008 and you have your first cheapo "lab" for less than $100. ;) |
| KungFuJosh:
--- Quote from: Aldo22 on May 26, 2023, 02:55:04 pm ---These gadgets are kind of cute, but somehow they don't make much sense imo. Can the DSO-TC3 still not measure ESR? --- End quote --- Does accuracy matter? It's not an LCR meter, but it does show ESR. Is the number real? Great question. I tested a UKZ2A220MPM 22uF 100V electrolytic cap. TC3 said: 21.3uF, ESR=0.11 ohm DE5000 said: 19.08uF, ESR=1.09 ohm Shannon tweezers said: 19.97uF, ESR=2.7 ohm 3055X-E said 20.5uF (no ESR capability) |
| KungFuJosh:
I was just messing around with the signal generator on the TC3, and it's surprisingly not that bad. The 1k 3Vpp sine wave came up clean on my SDS2504XP with 3.017Vpp, and 1.023K for the frequency. All the other forms were pretty clean, but the top of the square wave was a little goofy. The signal generator also keeps a square wave running when you're in DSO mode for probe calibration. Overall, pretty awesome for a $50 toy. |
| indman:
--- Quote from: KungFuJosh on May 27, 2023, 01:08:17 am --- It's not an LCR meter, but it does show ESR. Is the number real? --- End quote --- https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/msg4785317/#msg4785317 No, this figure shows the weather on Mars or something similar, but not the real ESR of the capacitor. So far, DSO-TC3 in terms of measuring the secondary parameters of capacitors is more like a beautiful toy. ^-^ |
| Aldo22:
Hi KungFuJosh --- Quote from: KungFuJosh on May 27, 2023, 01:08:17 am ---Does accuracy matter? It's not an LCR meter, but it does show ESR. Is the number real? Great question. --- End quote --- OK, I see. Can we say that the DSO-TC2 was at least honest by not displaying the ESR at all? ;) --- Quote from: KungFuJosh on May 27, 2023, 01:22:55 am ---I was just messing around with the signal generator on the TC3, and it's surprisingly not that bad. The 1k 3Vpp sine wave came up clean on my SDS2504XP with 3.017Vpp, and 1.023K for the frequency. All the other forms were pretty clean, but the top of the square wave was a little goofy. The signal generator also keeps a square wave running when you're in DSO mode for probe calibration. Overall, pretty awesome for a $50 toy. --- End quote --- I also have some sympathy for this little device because it looks cute, but if we're honest, it's not really good at anything. Max 100kHz? A $3.90 DIY SG can do 1 MHz with adjustable amplitude. A $62 DSO1511G has a 2MHz Signal Generator. |
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