FNIRSI 2C53T 3-in-1 50MHz 2CH Oscilloscope Multimeter DDS Signal Generator | 250MSa/s Sampling, 19999 Counts Multimeter, Handheld Protable Oscilloscope, Auto Measurement for Automotive Electronic Repair

At this point I've lost track of how much FNIRSI equipment I own. I have at least two oscilloscopes and two of these scopemeters, plus a Geiger counter/RF/magnetic field meter, LCR meter, volatile gas detector, portable soldering iron, and I'm not even sure what else :) This is another nice, inexpensive product with loads of features and excellent build quality. I bought it because I need to set up a mobile lab and while I don't often need a scope on the road, I OCCASIONALLY need one, so buying a scopemeter was the right path. Like all of FNIRSI's multifunction devices, it's packed with useful features.All the probes you'd need are included. Multimeter and oscilloscope are full-function and the display is bright and legible for both. If you're used to FNIRSI's touchscreen scopes, well, this isn't like that - it is more like a traditional buttons-and-knobs scope, but not quite. The learning curve isn't too bad and you'll be familiar with it in a half-hour of tinkering.UI defaults to Chinese, or at least it did for me - if you don't read Chinese, you'll have to navigate blind to the settings screen, where - luckily - Chinese/English selection is the first option. It's pretty obvious how to get there. Chinese is also the first language in the instruction manual but the English version is right after it and is easy to understand.Another great product!

Working with electronics on the bench (and sometimes in the field), I didn’t expect something this compact to replace multiple tools—but the FNIRSI 2C53T genuinely surprised me.Three Tools, One Device—And It’s Not a GimmickInstead of juggling a scope, multimeter, and signal generator, I’ve got all three in one unit. It’s not just a “nice to have”—it actually saves space and speeds up troubleshooting. The device combines these functions into a single compact package, essentially replacing multiple instruments in one go.Performance That Punches Above Its SizeFor a handheld unit, the 50MHz bandwidth and 250MS/s sampling rate are more than enough for most embedded work, power electronics debugging, and general signal analysis. It captures signals cleanly, and the display is bright and easy to read.Great for Real-World DebuggingI’ve used it on microcontroller projects, power supplies, and even quick field diagnostics. The built-in battery lasts several hours, which makes it practical when I’m not near my main bench setup.Feature-Rich Without Being OverwhelmingThings like XY mode, persistence, and waveform math are included, which you don’t usually expect at this price point. The interface is straightforward enough that I didn’t need to dig through a manual to get started.A Legit Tool for Hobbyists and ProsThis isn’t replacing a high-end bench oscilloscope—but it’s not trying to. For portability, versatility, and value, it’s one of those tools I keep reaching for more than I expected.

This works pretty close to its claims and is undoubtedly a good value. The bandwidth claim is more honest than many others out there, that's for sure. And I have tested many. My test equipment only goes up to 40 MHz but handled up to a 40 MHz sine wave without any amplitude degradation. That's the good news. The bad news is that the amplitude INCREASED with the frequency both as the displayed waveform and the calculated value displayed. A 10 Vp-p 100 kHz sine wave showed as 10.25 Vp-p. This kept increasing with frequency until it showed 11.9 Vp-p for a 10 Vp-p sine wave. But there was one highly annoying behavior. When you press AUTO, it automatically sets volts/division and the timebase but sometimes gets confused. Such as if I suddenly gave it a 30 MHz square wave. It continues to display "Awaiting Auto Measurement." I pressed every button to try and get out of it. Even the POWER button would not work. I disconnected the signal, and it continued to be "locked up." After another minute, it magically cleared itself. Total time was over two minutes. I saw this several times. An annoyance like this is really enough to give zero stars and reject the item outright. But its price is so low and so much of it works reasonably well that it is still worth considering. But the manufacturer REALLY should not have a design can lock up the system leaving you helpless. If this happens to you much, you will probably give up on "AUTO" and make those settings manually. I also focused on AC voltage measurement. The manufacturer does not state the AC frequency response in advertising, and not even in their manual. (It is an important spec and should at least be in the manual.). A query to them produced an answer that is about 450 Hz. So, it is minimal, but that is common for most inexpensive meters. In testing, it was excellent for a sine wave up to 1.5 kHz. The manufacturer also said it was not "True RMS." This usually means a square wave reading will be 11% too high. But a 400 Hz 10 Vp-p square wave read 9.732 Vac (10.000 would be perfect). The device may be trying to figure out something about the AC wave shape after all.

I have an old Tek 2465A on the bench but needed something more portable for some automotive work. This does a nice job in checking sensor pulses as well as basic voltmeter needs. Not as powerful as a Fluke 55V or versatile as the Tek but portability and quick checks on the road are all that I need this for.

I was looking for a scope meter for electronics hobby work and was referred to this pocket oscilloscope by a friend. I was surprised by how many features this item had for the price. Excellent quality all around and very easy to use.Came in a good carrying case with oscope and multimeter leads. Did I mention it is also a multimeter? Also comes with an easy to read instruction manual to get you started.The auto feature ranges everything for you so you don’t have to be an oscope guru to set it up.

Wow, these guys make a lot of instruments! So I chose the FNIRSI.I started exploring the user interface and found a maze. My closet gear is Tek and Fluke. How complicated can you make an oscilloscope?Well, when you look at how many different models FNRSI makes, your answer is there. They seem to create different models with different menu mazes. The company's own video prides itself on their vast tree of functions.But after trying to navigate to basics I got lost and lost interest. In spite of all the promise, the cool look, the huge variety of instruments that FRNSI makes (and the nice carrying case it came with ;-) ). It was tediously slow to use. You want a scope or a Rubic’s cube?And then the bugs started, many leading to the FNIRSI 2C53T bricking up, with NO way to recover, other than waiting for the battery to run down. Updating the firmware changed nothing. No fun. One star, returning.I had also ordered a similarly featured unit from a smaller company, ZOYI, that turned out to have a clear menu and button structure with direct access to functions, like it was designed by a multi-meter company. I prefer that.It goes to show that an impressive range of models and features s no proof of a company's footing.

Man, have we come a long way with test equipment. This thing is great. A portable workbench.* After using it awhile, it’s still amazing functionality, but it is not accurate. The scope measurements can be way off, as well multimeter readings. It’ll be a handy tool, though.

Pro: It does what it promises, and for the price, it's not a bad unit. It comes with a nice carrying case and all the necessary probes. If you mostly want it as a voltmeter and just occasionally need to look at a waveform, it's probably a viable choice. If you already have a voltmeter though, buying this device makes less sense as the additional functionality is rather limited.Con:* The screen is too small, low resolution, and not bright enough, even at its brightest setting, to comfortably work with waveforms, and I wasn't even trying to use it anywhere near full daylight. Especially the grid is virtually impossible to see under any lighting conditions and there is no setting to make it brighter.* Having 8-bit resolution was standard for a long time, but economical scopes have come on the market a couple of years ago with 12-bit resolution at >= 1 GSa/s, leaving this device far behind in signal resolution.* Even more limiting is the miniscule 1k storage depth. With that limitation you can't really use the device for anything more than simple repeating waveforms. Trying to make sense of any digital data communications bus over any significant period of observation time will be next to impossible.* Limiting the signal generator to 50 kHz max is also a curious choice. With that, it's really not meant for anything more than checking out some audio equipment.* The BNC connectors on the device are closely spaced together and recessed to make them fit on the available space (top edge) and not stick out from the device. While this might look good, it makes it almost impossible to fiddle the probes' BNC counterpart onto the connectors, since you can't really grab and turn them, given the recessed position. Also, high quality probes that have thicker shielding at their base don't fit at all because of the recess. This is a major physical usability design flaw.

水晶振動子の動作確認用に使いましたが正確に発信周波数をとらえています。

muy útil

Osciloscópio portátil apresenta uma construção bem robusta, simples de usar. Qualquer coisa, pode usar o manual ou pesquisar no youtube o canal do fabricante que acha videos curtos explicando o uso. Além disso, vem com uma bolsa para guardar o dispositivo. Bom custo benefício pelas funcionalidades que oferece. Mas a tela não é tão grande, mas para pequenas aplicações já é suficiente.

Good product and orginal

It's a great product for all technicians.I had used this product before in another country its very nice and easy to use.