- FNIRSI 2C53T Upgraded Handheld Oscilloscope, 50MHz Bandwidth, 3IN1 Digital Oscilloscope Multimeter DDS Generator, 250MS/s Sampling Rate, 19999 Counts, Voltage, Current, Capacitor, Resistor, Diode Test

I bought this to set up my audio equipment in my car and so far I’m more than please with the results, after playing around with and seeing what I can do with it I’m hoping that I can inject a 40Hz signal and take a voltage reading at the same time I’m just not sure this meter will do just that but if it doesn’t I do have another voltmeter to get that measurement. We will see as time goes by and I play around with it to see what this thing will do. Of course I’ll give an update if after time it does more than expected or starts to disappoint. But either way I believe for what I know it can do at this point it’s well worth the money just having a handheld oscilloscope and voltmeter combined.

Nice handheld scope. Had it for a few weeks and it seems very functional. Compared some traces with a 4 ch LeCrow and it was very comparable (digital CMOS logic gates). It's a small screen for sure, and the grid lines are a little hard to see even at the highest brightness. The function generator is a bit limited - seems to go up to 50kHz. Another cheap handheld scope I had (and lost) went to 1M. There a multimeter mode as well that looks functional. It plugs into a PC but I think it's to transfer over screen shots - I don't see any SW on their web site to control it remotely over USB. A good deal for sure. A nice case, some ok probes, and some misc cables to use with the DMM are included. I checked them and they all worked in my copy

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.

Best value and quality for a travel version!!! Thank you created a loyal customer bow I want more of your products!!! Thank you again!!!

An oscilliscope for under $100! First, this is a 50Mhz scope. You will not be using this to align the front end of your Ham radio! It is not sensitive like a high end bench scope. That being said, this tool is great for hobbyists and auto mechanics alike. The sampling rate is lower than expensive O'scopes, but again it costs less than $100. You can do a lot with this multi tool. Checking values compared to my $500 Fluke meter, the readings were very close.👍 Included is 2-10x probes for the dual trace scope. Signal generator leads, and multimeter leads. They are COPPER! Not copper coated steel. Overall, value for your money, you can't miss with the 2C53T. For the hobbiest or technician in the field, the 2C53T is a must have, and it won't break the bank!

Good meter for standard troubleshooting. Not recommended for precision calibration use. All functions work as needed. O-scope is limited in adjustment but it does work. I was able to use it to see the 20-70ms pulse width signals from a breaktor module on a EV battery disconnect. Everything else I have used it for has been basic and it works as needed. The battery holds up well so far. Did not like to use this meter at 1st but has become my go to meter as I get more familiar with its abilities. I would recommend this for advanced or advancing electrical users. Not ideal for beginners as you need an advanced understanding of electricity to understand the settings needed to get desired results. The unit has a nice auto feature to help with this but I find the auto readings are not always what I am after. The manual settings can get you dialed in. If you need advanced readings for troubleshooting then this meter will most likely get you what you need. If you don’t need the advanced readings then get a simple meter.

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。

Try this it's good Getting femiler with the product

Nice product 👌

Great meter works as advertised and it just as accurate as my more expensive meter . I will not hesitate to recommend this meter for someone looking for a great meter.

Recently purchased, good, complex device, need more time. Thanks 👍