FNIRSI DSO-TC2 LCR Meter & Digital Oscilloscope 2-in-1 Quick Unboxing Review – the DSO-TC2 is a handheld digital oscilloscope plus transistor tester in one box.
However, its oscilloscope bandwidth is only 200 kHz – practically useless. I bought it for the transistor-testing and LCR-measurement features, which are pretty handy.
Picked it up on Taobao for a bit over 200 RMB.
Overview
This product ingeniously combines a digital oscilloscope, component tester and PWM signal generator in one palm-sized unit. A large colour TFT dot-matrix display, built-in rechargeable lithium battery and tiny footprint give users more functions and better portability.
In “Mos Test” mode it identifies all kinds of transistors, pin-out, polarity, hFE and threshold voltage; it also measures capacitors, resistors and inductors.
Download the manual here: https://url.zeruns.com/UoJ7J
Oscilloscope-mode specs
| Real-time sample rate | 2.5 MS/s |
| Analog bandwidth | 0–200 kHz |
| Input impedance | 1 MΩ |
| Coupling | AC / DC |
| Voltage range | 1:1 probe: 80 Vpp; 10:1 probe: 800 Vpp |
| Vertical sensitivity | 10 mV/Div – 10 V/Div |
| Vertical offset | adjustable, with on-screen indicator |
| Time-base | 10 µs/Div – 500 s/Div |
| Trigger modes | Auto, Normal, Single |
| Trigger edge | Rising / Falling |
| Trigger level | adjustable, with on-screen indicator |
| Waveform hold | YES (HOLD) |
| Auto measurements | Vmax, Vmin, Vavg, Vrms, Vpp, Freq, Period, Duty |
| PWM output | F: 0–80 kHz, Duty: 0–100 %, Level: 5.0 V |
TC2 component-test specs
Automatically identifies and measures NPN/PNP BJTs, N & P MOSFETs, JFETs, diodes, dual diodes, SCRs, plus passive parts (R, L, C) and pin-outs – very convenient.
Where to buy
Taobao: https://s.click.taobao.com/XsWe4Nu
PDD: https://p.pinduoduo.com/xY5nwxv9
Unboxing
Front of box
Back of box
Accessories: P6100 high-voltage probe & adapter, test hooks, ordinary probe, manual, Type-C charging cable.
Front of DSO-TC2
Type-C charging port on the bottom
Top panel: scope input, PWM output, 0–16 V voltage-measure input.
Bottom – pull out the little stand to prop the unit up.
Testing
Power-on menu lets you choose component test or oscilloscope mode.
Oscilloscope mode
Measuring its own PWM output.
Capacitor test
Nominal 1000 µF electrolytic: DSO-TC2 reads 1093 µF, VC890C+ DMM reads 1097 µF – close enough. Vloss (capacitor loss) is also shown.
Nominal 470 µF: DSO-TC2 420.2 µF, DMM 430 µF.
Nominal 330 nF monolithic: DSO-TC2 349 nF, DMM 346 nF.
DS18B20
DS18B20 temperature sensor works; DHT11 temp/humidity also supported.
Resistance
Nominal 4.7 kΩ: DSO-TC2 4659 Ω, DMM 4.62 kΩ.
Diode test
LED: forward drop 2.51 V, junction capacitance 10 pF (DMM can’t measure).
1N4007: DSO-TC2 703 mV + 2 pF; DMM 583 mV.
Transistor test
BD243C PNP: hFE 429, Ube 666 mV, Iceo 0.35 µA.
MOSFET test
IRF540N N-ch: Vt 3.52 V, Cg 3.194 nF, Rds 0.2 Ω, body-diode Vf 621 mV.
Inductor test
Nominal 33 µH: reads 30 µH, resistance too low to show (0 Ω). Minimum resolution is 10 µH – not great.
Recommended reading
- High-value & cheap VPS/cloud server picks: https://blog.zeruns.com/archives/383.html
- Build your own NPS intranet-penetration server with web UI: https://blog.zeruns.com/archives/660.html
- Website building tutorials: https://blog.zeruns.com/category/web/
- Minecraft server setup guides: https://blog.zeruns.com/tag/mc/
- Tolia adjustable PSU X08P3010 unboxing & teardown: https://blog.zeruns.com/archives/698.html
- STM32 reading SHT3x temp/humidity sensors: https://blog.zeruns.com/archives/700.html