FNIRSI 2C23T 3-in-1 10MHz Oscilloscope Multimeter DDS Signal Generator

I am revising this review as it “was me” sort of. It occurred to me after posting a somewhat negative review that possibly something was wrong and “floating“ with the probe. On careful inspection I noticed when trying some DC voltages that odd things were happening as I moved around probing different points. Using a clip cord instead of the supplied little jumper for the “negative“ my problem disappeared. Then, of course, I measured some AC with the clip cord and voilà problem solved 120 VAC was measuring reliably 338 V peak to peak. Which is more than close enough for me for the price of this little scope. On close inspection, the little clip cord for the probe was broken at the alligator clip end. Replacing it with a new clip, solve the problem. Further, the seller reached out to me to rectify the problem after I posted the review. My original review : I don’t think it is me, but…. Didn’t really get around to trying this thing out for a couple of months. Bought it mostly as my 40 year-old Tektronix gave up the smoke, and I use/need a scope every 5 years at most. Presently I had bought it as I wondered about the waveform (ends up pretty poor) from my whole house Generac guardian generator. So this little scope is convenient as heck, but unfortunately shows only 196 to 200 V peak to peak reading my 120 V RMS generator, or a on a quality solar generator it’s only reading 185-190, or on line power 190-195. So although I am super impressed by the display, reasonably impressed by the functionality, for actual AC measurement, it seems pretty useless. Several calibration trials didn’t seem to make any difference. Perhaps I will see if there is a firmware update. On the multimeter, no problems whatsoever. 120 V RMS is 120 V RMS.

I recently purchased the FNIRSI 2C23T 3 in 1 Handheld Oscilloscope Multimeter DDS Generator and I must say, it has exceeded all my expectations. This versatile tool, with its 2 channels and 10MHz bandwidth, coupled with a 50MSa/s sampling rate, has made my electrical measurements and diagnostics tasks remarkably efficient and accurate. The 10000 count multimeter functionality is a bonus, seamlessly integrating voltage, current, capacitor, resistor, and diode testing capabilities into one compact device. But what truly sets this product apart is the outstanding customer service I experienced. Upon realizing that an oscilloscope probe was missing from my package, I contacted their support team. Not only did they respond promptly and courteously, but they also exceeded my expectations by immediately sending the missing probe. To my surprise and delight, they included a free tiny oscilloscope as a goodwill gesture. This level of customer care is rare and truly appreciated. The device itself is user-friendly, robust, and reliable, making it an essential tool for professionals and hobbyists alike. Its intuitive interface and crisp display add to the overall user experience. The accuracy and range of measurements it offers are comparable to more expensive models in the market, making it a cost-effective solution for a wide range of electrical testing needs. In conclusion, the FNIRSI 2C23T is not just a high-quality product, but it's backed by a company that genuinely cares about its customers. Their prompt and generous response to my issue has earned them a loyal customer. I highly recommend this product to anyone in need of a reliable and versatile electrical testing tool. Five stars well-deserved!

The little o'scope that CAN. Works great for audio and HF radio frequencies (up to10 Mhz). Loved that it came with two 100 MHz probes with hooks that compensate well. The probes can be color-coded for easy identification when using both oscilloscope channels. The signal generator, accessible from the main menu, can be used simultaneously with any other instrument (oscilloscope or multimeter). The signal output defaults to 3.0 volts peak-to-peak and can be adjusted up to 3.3 volts peak-to-peak. Common waveforms are available, including Sine, Square, and DC. The frequency counter on the oscilloscope works well, although it changes from 799 Hz to 0.80KHz, which is a little visually distracting and not great if you're looking for exactly 800 Hz (which I was) since a digit of accuracy is lost at the switching point. I'd prefer that it switch at 1 KHz, but it's hard to complain for the price. It's also missing a calibration output for easy probe compensation checks, but use the signal generator to send a square wave at the frequency you intend to work near, connect the oscilloscope probe(s) to the included test leads, and the probe compensation is easily adjusted. The multimeter performs common tasks needed with modern Digital Multi-Meters, including auto-ranging Voltage, Resistance. and Capacitance tests. I haven't used it to measure current, but I probably won't ever do that anyway - I prefer to test current with a dedicated current meter to avoid mistakes and letting out the magic smoke. I ran the oscilloscope for several hours and barely moved the battery indicator icon on the screen. The battery quickly charged on a USB-C charger (not included, but a USB-C to USB-A cable is included) and will charge while it is being used. It's an excellent product for the price, in my opinion. Well done!

Not bad but I wish that there was a charge indicator when it’s off and charging. You have to turn it on to see if it’s charging.

Works well in small cramped areas as second oscilloscope. Portable. Multimeter is excellent. Component tester works great. Signal generator produces multiple dc signals. Oscilloscope works well, only quirk is it defaults to ac coupling when auto button is pressed, could likely be fixed by a future software hopefully. Slightly confusing UI. But great value for money.

Love this tool use it every chance I get

Multi-function handheld unit with a very good screen and logical layout. The oscilloscope function is quite good and, setup and used properly, will clearly give frequency (and relative power) information on a unit that is very portable.

Seems to work fine, great buy for the price. My only objection is that it only came with one osilloscope probe, but that was all that was pictured. I ordered a second and it's on it's way. So far I really like it, hopefully it holds up but it seems to be built well.

Wow, full featured, great little instruction book. I am impressed. I have only been using this a week so far and a full multimeter plus oscilloscope in a hand held form is a game changer

Bueno y completo para el precio

Good device for the hobbyist. Has two channels and a signal generator. Also, it comes with a DMM. I have tested it and it appears to be accurate enough for my needs.

Écran de lecture pas très grand. Pour un appareil portatif, c’est quand même très bien! Après quelques vérifications avec un oscilloscope de précision, l’appareil semble assez précis.

I’m very impressed with the functionality and the quality of this little unit, the telescope is very clear and easy to read. Easy to change settings and works well. Highly recommend this I do demonstrations in the automotive world and I’m utilizing this as telescope also diagnose many hard to find problems on a Land Rover with the same scope highly recommend