FNIRSI 2C23T Functional & Performance Review
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- Опубліковано 12 гру 2023
- The second part of my review of the FNIRSI 2C23T, a multi-functional oscilloscope, multimeter, and function generator. In this video, I provide an in-depth review of its functionality and performance.
If you are working on projects in need of high quality PCBs, head on over to www.pcbway.com/
Thank you to @zoltancsendor5153 who opened his unit (with board version V0.3) and found that the some of the IC’s did not have their IDs erased:
ADC: 3PA1030
FPGA: AG1KLP
MCU: AT32F403A
You can purchase the 2C23T on AliExpress here: s.click.aliexpress.com/e/_oDn...
Manuals and software updates are available here:
www.fnirsi.com.cn/download/digit - Наука та технологія
I bought this for my husband after watching your review:-) Happy husband = happy wife 🤪.
Thanks for the comment! Very glad you have a happy husband! 😊
I ordered a FNIRSI 2C23T about a month ago but didn't play with it until watching your videos. Thank you for taking the time to make these videos, it really helped to understand how to use it. Also your videos helped to know what quirks to look for and possibly accuracy issues. It is a fun little unit to play with and certainly the one to take on the road when wish to do items away from home. Always take two multimeters with me, so this will quickly become that second multimeter with the bonus of having an Oscilloscope and function generator. Thank You.
Thank you very much for your kind comment and I am so glad the video was helpful to you 😊. Enjoy your new unit!
Thank you for your diligence. You really do deserve more subscribers.
Thank you, I appreciate that 😊
I just ran across your channel and immediately signed up. Honestly, you deserve many more subscribers. I'm one of those who admires your unbias reviews.
Hello, really appreciate your comment and thank you very much for subscribing! ☺️🙏
I am considering buying this piece of equipment and must say your detailed reviews and teardown were very well done indeed, and invaluable! Compliments sir! Let's see if they can actually deliver them...! Cheers from Connecticut!
Thank you for your kind comments, glad it was useful to you. You may also want to check the Zoyi ZT-703s. There are already a few reviews on UA-cam. I have just received one myself, however I will not be performing a review for a few weeks - too busy!
Super useful video! Just got one! It's pretty nice for the cost! :)
I was stuck on where to start on how to operate the multimeter and got lucky noticing the secondary function on each button which allows you to navigate the multimeter features.
You are most welcome. Yes it is quite easy to use. Have fun with it 🙂
Fantastic performance review!!!
Thank you very much for your kind comment.
You're doing the lord's work here, thank you!
Thank you!🙏
Mine should arrive any day now. Great video, now I don't have to figure out how to use it on my own. I buy all this new equipment, It is so cheap and fun to explore, I just received my new ZEEWEII scope/meter and it is fantastic. I will use both meters in my garage for testing everything I need to test.
Glad I could help!
Very good intel and excellent video
Thank you, glad you found the video useful.
Many thanks, I did buy one of these and think that for the price it will suit my needs well. I only really wanted a single channel and working on voltages less than 24V DC, so this is fine for me as a hobbyist. I see what you mean for higher voltages on the Oscilloscope side of this device, but I think if you are working with such voltages, you would pay a little more and get something more suited to that line of work.
Many thanks for the great videos and I will look forward to more in the future.
Take care and stay safe,
Joe
Thanks for you kind comment Joe!
After looking at this video I ordered one. Primary reason was that I needed a decent multimeter. Not much extra cost for added functions. Had a Fluke Scopemeter thirty years ago which was very useful when working with industrial automation. Now retired though sometimes an oscilloscope could be useful.
Thanks for comment Mike. Wow you had an early scope meter. Yes 2C23T is not a bad scope meter for the price. All the best with it.
I got mine from Temu special offer £34!! At that price I had low expectations especially at low current and the 'scope. I use it for automotive applications fuel injector pulses, etc where it really is in its comfort zone. At just over £30 or £80 full price it is a fantastic package! Thanks for the additional info on screenshots and firmware upgrades, etc.
Hi Barry, thanks for the comment and I am glad that you found the video useful. Wow, that is incredible value - good catch!
@@ElectroBananasYT I note your insightful use of the word "catch"😂 The "catch" was, after seeing your presentation, learned of missing items: my unit arrived in a plain box with no nice instruction book and the serial number label missing but hey! it all works. I also note the 4051 shift registers still being used, more than half a century! I still have my red Motorola 4000 CMOS data book from 1976. I also note your Tandy Realistic AM radio - you are a blast from the past and present Sir!!
Thank you Barry! Well it is still an amazing deal! And good to see those old logic IC’s still being relevant today. Yes I like to mix modern with retro 😅
This product is starting to become very popular. As a third video, could you show how to use this oscilloscope to find or measure a faulty component on a power supply, a modem or a computer motherboard? I'm sure this will guide novices like me and enable you to reach more followers. Also, I would appreciate it if you didn't forget to add subtitles. May the strength be with you.
Thank you for the comment, yes i see that it is selling well. Quite unique at that price point. I will be sharing some repair videos in the future and I will try to make a point of using the FNIRSI :)
@@ElectroBananasYT🎉🎉🎉
I ordered one of these after watching your first installment, the shipping date keeps getting pushed back as they are out of stock. Good honest review.
Thank you for your kind comment. I think you will enjoy it when it arrives. Let us know what version of software is installed!
@@ElectroBananasYT Hi just a quick follow up, mine arrived today (27/12) it has firmware V2.01 installed, it's certainly feature packed for the price, I'm hoping X,Y mode will be implemented in some future update.
Glad you received it. How are you getting on with it?
Great video, both actually . I found your videos after ordering mine . I'm waiting for it to arrive. I am curious after watching your tear-down video if I could 3d print a new topper to expose enough room around the BNC connectors to take shielded probes. Then again maybe I wont as a way to remind myself to avoid high voltage, maybe.
For me it's a huge gain of space on my desk in the house and I can move some of my other kit to the shop.
Now if only they make one with a multi CH logic probe packed in with data logging out to PC. LOL That would really clear my desk in the house.
Thank you! Actually I had the same thought as you about 3d printing a new rear panel to allow the insulated BNC connectors to be used. I don’t use my desktop scope as much now, keep reaching for the 2C23T for basic scope functions.
Thanks for your help and
You are welcome
Great video! I ordered one.
Hope you enjoy it!
Thanks for your
Most welcome
picked one up. only tested the multi meter but my unit is whiten .3% of NIST traceable equipment. Temp is off a little but withe spec for the setup. Overall nice little unit. Also you can replace the boot image to whatever you want.
Thanks for your comment. Yes I enjoy using it too. I have had limited success changing the boot up screen/graphic.
Amazon $90 FNIRSI 2C23T 3 in 1 Handheld Oscilloscope Multimeter DDS Generator, 2 Channels, 10MHz Bandwidth, 50MSa/s Sampling Rate, 10000 Counts, Voltage, Current, Capacitor, Resistor, Diode Test. The X-Y mode would have been a nice feature. 😎 Thank you, great video.
Thank your for you nice comment 😊 I also have a hardware review video on this device
Thank you very much for the review.
You are most welcome, I had fun making it too
저도 구매를 하여 사용중에 있는데 매우 유용했습니다 가성비가 훌륭 하다고 생각합니다 😝 Review가 많은 도움이 됩니다 감사합니다 Channel을 열심히 구독하고 있습니다 좋은시간 되세요
안녕하세요, 좋은 댓글과 구독 감사드립니다!
I was able to use an android phone to send the firmware update to the oscilloscope which was not expected to work but it did and very very quickly too.
That is interesting, well I guess you just need to deposit the file within the drive that the Device creates in program mode. Nice work! 👍
Yeah absolutely just copy and paste the file to the root of the drive and it's done in a flash literally. I used the Google files app and had no issues whatsoever
Thanks for the review. What do you think comparing this model to Owon hds272s? i know Owon is double the price but Fnirsi is far from the performance of Owon? Thanks
got it for me and my dad, using it just for simple component testing in cars and so on where the stationary is impractical or a bit of a overkill.
Hope you and your Dad get on well with it!
@@ElectroBananasYT He likes it, great for his car projects.
Great review. Did you do the undocumented maneuver after taking all the measurements/eval? And do you thing the Red battery level affected anything? Amazing what they are doing with these handhelds. I have the Zoyi 702. 👍
I have the 702s as well, a whole new world. Pos as far as serious scopes go but wow it opened a whole new way of looking at electronics. My first scope.
Thank you for your kind comment. I had used the functionality previously and it has always passed and entered a mV mode. Fortunately it only failed sometime after I did the accuracy tests. I doubt the low battery warning would make a difference but I will retry the calibration again when fully charged - good point. How is the 702?
Would you recommend this for 40hz 10-150v ac
The usage would be setting gains on car audio amplifiers using the oscilloscope up to where the sine wave starts to clip.
Thank you for a thorough video 🙂
Thanks for your comment. Seems like a good application for the 2C23T 👍
First of all, thank you for these 2 videos about this product, my question is if there is software for PC and connecting the FNIRSI to the PC's USB. Thank you. Greetings
Hello, thanks for your comment. I am not aware of any applications.
If you connect the FNIRSI to the PC, it appears as an external drive and you can see the bitmap images of any screenshots you have saved. You can also store a new start-up screen here if you wish to change it (details of how to do this are in the manual). If you enter bootloader mode on the FNIRSI and connect it to a PC, another external drive will appear that you use to download and store new firmware.
Thank you for the excellent review. I would like to use two channels to input a 20khz square signal and use the second channel hooked up to an antenna to receive the same signal and measure any frequency shift and to measure the decay. I will boost the signal with an audio booster circuit and transmit the boosted signal. Is this possible? Thank you for your time and efforts tgst you have spent in my behalf.
Thank you very much! Glad the video was helpful to you. not sure I fully understand your project. It is only 20KHz and you are using an antenna? Do you mean microphone? Perhaps you can email me some more details?
Do you think a firmware update can fix the jittery / inaccurate in dual channel mode?
That would be nice, although I think that the issue is so obvious, if it could have been fixed with software, FNIRSI would have done it by now. So most likely it is a limitation caused by the hardware design limitations. Fingers crossed I am wrong …
Do you know what maximum current the signal generator can emit? 20-30mA? Is there any over-current protection?
Sorry I don’t know. However if you have a look at the section of the video that covers the function generator, we work out the output impedance. It is 100ohms. So this will limit the max current and provide a degree of short circuit protection to the device
Just now I got this 2C23T but one thing I found: the volt value that write on oscilloscope screen less than input but the drawing is correct , input is 5.000 V and the multimeter mode is correct and drawing wave on oscilloscope is correct but the value write on oscilloscope is 4.800 is there a way to calibration ?
Hello, there is a secret calibration function (it is in my video at the end), but it is only intended for use by FNIRSI during factory calibration and there are no instructions on how to use it - so don’t!!! You might uncalibrate your device!! The multimeter does provide slightly different reading sometimes, especially with ac / fluctuating voltages as the multimeter attempts to give RMS values. Were you measuring DC?
Can the function generator output voltage be adjusted down to the milli-volt range like 0.0025 v and 1kh frequency?
Hello, output voltage can only be changed in 0.1V steps. So the lowest is 0.1V.
Very nice tests and points made. A bit dissapointing on the square wave and the Nano test. This last test put it more on the toy side ..... Have you tried the Zotek 702 ?. I do audio repairs and some SMPSU repairs, probably good enugh ... but lacking XY ?? ..... COME ON !!!!!
No not tried a Zotek. I would be interested to review one and see how it compares to the FNIRSI
I'm looking for specs on vertical resolution....8 bits?
Hello, from what I can tell, yes it is.
Thanks for the review.
I am looking for a small decent oscilloscope to test sensors on cars, such as cranshaft sensor, camshaft sensor, oxygen sensor etc etc.
Is this good enough to do that do you think ?
Or is it overkill ?
Suggestions ?
Thanks
I think it would be good for such an application where the signal frequencies are relatively low.
I am also thinking about buying it for the same application on forklifts, was curious if you bought it and how it worked out? Is it doable or no?
@@angealus Nope sorry, not as yet.
Hello! Great video, but I have one problem..I can t find anymore the 2.0.2 firmware update on fnirsi official site. If you can help me..thank you in advance!
Please send me an email
Thanks a lot for this video. . . would you share the update V2.0.2 ? . . . is not longer in FNIRSI Download page :(
Thanks for your comment. As you are a subscriber, I will be happy to send to you if I have it. Send me an email and I will see if I still have it to send to you.
@@ElectroBananasYT Done TIA XD!!
Email received and firmware sent.
@ElectroBananasYT After your review I ordered this from Amazon for $79, it will be delivered by tomorrow, let's see if it is a good addition to my tools.
Hi, thanks for your comment, hope you have fun with it. It is easy to use, but beware of it's limitations :)
@@ElectroBananasYT Thanks, yes I got it, its 2 channel Oscilloscope but I dont know why they have provided only 1 probe with it? I noticed that it is not measuring anything below 4 mV although it is 10000 TRMS
Hi, when I bought mine there were two options - with one probe or two probes.
Thanks for the two great reviews.
After looking at them I decided to buy the device.
But now I have a problem.
When trying to update the firmware, the device rebooted to 100%, but then it didn't turn on anymore. I wrote to support.
Can you advise what I can do?
Hi, sorry to hear of your troubles. I can’t really help you there. Their support is quite good. Wish you well in getting it fixed!
I was able to run it.
I disconnected the battery, charged it on an external charger. I reconnected it, reset the unit and it started bootloader mode only. So I was able to flash the firmware successfully and the device boots normally.
I can now test all its features. :)
Well done!👏
Hi, I’m considering purchasing one of these, but was wondering if the one you have still works to see how well it lasts. Could you give an update on that?
Hello, my original unit is working well and I enjoy using it. I accidentally cracked the plastic screen, however FNIRSI sent me a replacement. Other than that all good. I also bought a protective pouch to carry it around in.
Ok, I’ll probably make the purchase. Appreciate your feedback👍🏻
FNIRSI actually delisted the 2C23T from there Website a day ago. The question is why and wether it is still in production.
They are still manufacturing and selling the 2C23T. I contacted them. Their response “2C23T is currently in normal production and sales;
The website is currently under maintenance and updates.
We will refresh the new website information after the update”
@@ElectroBananasYT That's good to know, mine still hasn't been dispatched.
Hope you received it in the end
Excellent review, thank you for your work and your time. I have the same one, firmware 2.0.1, do you think it should be updated to 2.0.2? Thanks a lot.
Hello, glad you found the videos useful.
YOU MUST BE VERY CAREFUL IF YOU INTEND TO UPGRADE THE FIRMWARE.
As of May 2024, I have this following information:
Firmware V2.0.2 is only intended to fix issues with an older version of hardware.
If used on the latest version of hardware, the upgrade will fail and the device will not start - you will have bricked your device.
I think this is why FNIRSI took down the firmware from their website - I suspect that there were many users bricking their devices by trying to download load 2.0.2 to a device with a newer version of the hardware.
To determine if you have the ‘old’ or ‘new’ version of hardware, go to settings and see if you can see the hardware version displayed (hardware may be V0.4 or later). If you cannot see any hardware version, then you have the older version of harware.
If a device already has the latest version of hardware (V0.4 as of May 2024) a firmware update is not required as it would have been shipped with the latest version of firmware for that hardware (V2.0.1).
If you have the older version of hardware, then you can upgrade the firmware to V2.0.2.
I know, very confusing.
If you have bricked your device, contact FINIRSI by email / whatsapp. They are usually responsive and helpful.
Thanks for your answer, dear friend. Yes, you're right, this is a mistake. I only have 2.0.1 written. Does this mean there is no need to update? Thank you.
Hello, if you don’t see a hardware version then that means you have the old version of PCB. And this means you can update to V2.0.2 (as I understand it from the various blogs on the topic).
Please send me the file with firmware 2.0.2. Thanks a lot
Sent
😊😮🙏🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻
😊
At 46:26, the user manual for dual channel usage states: "When dual channels are used simultaneously, the ground clamps of the two probes must be connected together. It is strictly prohibited to connect the ground clamps of the two probes to different potentials, especially at different potential terminals or 220V of high-power equipment. Otherwise, the oscilloscope motherboard will be burned because the two channels are grounded together, and connecting to different potentials will cause a short circuit in the internal ground wires of the motherboard, as is the case with all oscilloscopes." Is there anything you may have forgotten or missed?
Nothing unusual here. For a multi-channel scope, the input grounds are usually common (connected together).
Remind me long ago a team doing a porototype, the tripped the lab breaker twice by mixing live and neutral across the two channels. Learn how the grounds are tied together : THE BAD WAY. If breaker trips once, just try a second time to be sure LOL
@@ElectroBananasYT This is why a love my half working TH720, isolated grounds 600V input. The LCD is dying after being repaired (as last resource ... polarizer change). Local Tek repesentative wont take it for repairs (too old). It is not alone, Fluke Scopemeters from the 90s vintage (Philips) also suffer from that. I still in love with the 123, what a beast !!!!. Roughed, trusty, unstopable.
I also used one in the past, built like a tank. You are lucky to have one!
Dear sir,
I would like to use FNIRSI 2C23T for component test , but i don't understand ,
please help me
thank you very much
Hello, that is a big topic. Suggest you search for ‘testing components with multimeter’ in UA-cam
Thanks! XY mode yet?
Not as far as I know ….. unfortunately. Well I guess they need to keep some features back for their next model 😅
hi ty for the brill fnirsi 2c23t video's ,, but when i update it it does not reboot ,, i sent it back ( to amazon ) and the same thing i have googled to see if there are any known issues ,, i wonder if you have any ideas ,, any help would be awesome .. ty - Earle
Thank you for your comment Earle. I have found the following information on upgrading the firmware (as of May 2024):
Firmware V2.0.2 is only intended to fix issues with an older version of hardware. If used on the latest version of hardware, the upgrade will fail and the device will not start.
To determine if you have the ‘old’ or ‘new’ version of hardware, go to settings and see if you can see the hardware version displayed (hardware may be V0.4 or later). If you cannot see any hardware version, then you have the older version of harware.
If a device already has the latest version of hardware (V0.4 as of May 2024) a firmware update is not required as it would have been shipped with the latest version of firmware for that hardware (V2.0.1).
If you have the older version of hardware, then you can upgrade the firmware to V2.0.2.
I know, a little confusing.
If you have bricked your device, contact FINIRSI by email / whatsapp. They are usually responsive and helpful.
@@ElectroBananasYT hi thank you for your quick response ( i appreciate it very much ) but as of this time my device just will not power up , and i have not ( as of 4 days now ) had a response from FNIRSI 2C23T ,, i liked the device and your videos help me a lot ,, and ideas on how to make it power up ,, would disconnection the battery help -- again ty
Hello, sorry to hear about the issues you are having there. Unfortunately I can’t advise you on this other than to keep trying with FNIRSI. They are usually responsive and helpful. I am surprised that they have not responded. Best of luck with it.
@@ElectroBananasYT Thank you for the excellent videos. I have been using it for a few weeks and your video helped with several questions. Mine is a 0.4 hardware version and unfortunately the V2.0.2 update bricked the device. I can get back to boot loader by pressing the reset button and then holding the menu key and pressing power. Hopefully Fnirsi will be able to give me a backlevel firmware to recover it.
Thanks for the comment and sorry to hear of your troubles. Normally FNIRSI are quite responsive. Hope you get it working again soon! Let me know how you get on.
Can it measure 220V ac waveform?
Yes it could, however I would not recommend it as the oscilloscope inputs are not CAT rated.
You can't measure analog video we refer to as acid test due to trigger, it doesn't have advance triggers as a proper bench scope would as you stated to complex of a signal for it rated specs. As far as digital signal square waves you need 10x the bandwidth analog and a lot more sample rate ADC. So watching your results was kind of expected for specs it claimed. The major issue is jitter and timing notice is pretty bad with this one, could be they are overclocking the ADC's? It good only for PASS, or No GO like most handheld of this price. I won't recommend for anyone that starting off, or using it instead of a bench scope at a a bench using as their main scope.
One question is the channels isolated from each other. grounds on BNC's not shared, they claimed it was which would make it useful if it actually is? If you can measure the ground between the BNC GROUND? When they stated that it peaked my interest especially for the size it is. I actually considered buying one just to see if it does? If it does will be one of my main portable scopes that will be used as repair switch mode supplies and control units and it's small size throw in a bag and make it lighter as have to carry a lot of gear around the city and in a lot of cases have to take subway due to not practical and pain to drive in downtown area. The only other thing wish it had 5mV like my oversize truly isolated handheld Tektronix scope vertical sensitivity. The Owon does but channels not isolated so have to use a battery powered signal generator to offset, or bring differential probe.
The scope section would be ok for HV so long channels are isolated from each other and you are using a appropriate resistor divider HV probe to the voltages are measuring, I measured 300v all the time and as high as 4kv on my Tektronix portable all the time and has the setting to accurate measure it with the appropriate HV probe. it is the main reason people buy these handhelds, especially us that repair power supplies. The multimeter won't trust for high current as lacking in protection area, when compared to a proper CAT rated Fluke multimeter. I had coworker manage to blow the flukes up even. For bench use the multimeter would be ok for low current, the multimeter section is better then my HDS3102m-n that costs way more like $425 more.
The crosstalk may be another issue as no shields on this one, I wonder if that has something to do with the jitter I saw in your test, as seem to be worst when you enable the other channel? Good way to test is use one of the channels keep other channel on and put vertical to 10mV and see if that channel pickup the signal from channel you are using?
Hello, thank you for your very interesting feedback. I did measure the grounds. Both the scope inputs, the sig gen output and the USB port all have their ground connections connected together. Note that the input sensitivity only goes down to 20mV/div. I will test the cross talk as you suggested and will let you know - good point.
Regarding the ADCs and the jittery triggering. With reference to my teardown video (35:45), I did have some concern on the spec of the ADCs as most of the refences to the specs of this device gave a spec of 35 MSPS rather than 50 MSPS, so you may be correct on the oversampling.
@@ElectroBananasYT Figured they lied about the two “isolated channels” they claimed in one of their picture advertisements. They would have to use optocoupler for that to be true and didn’t notice any in the scope section in your video. So wouldn’t be useful for power supply repair. It a Fnirsi so not surprising on the false advertisement. Do suspect same as you it a 35MS/s ADC and they are oversampling as well? I have handhelds one channel scopemeter that do a real 40 MS/s and signal stable on those even past the analog front end bandwidth.
What about battery life time work?
Hello, it should last 6 to 7 hours. Refer to the current consumption test in my hardware review of 2c23t at the 38:30 mark. ua-cam.com/video/L8-KsOObSY0/v-deo.htmlsi=8_FU_l1tizvvcI4v
Hello, I'm new to electrical engineering as I'm just a second year university student. Is it possible to use this device to both generate AC signals and then display the same signals with the oscilloscope on the same device simultaneously?
Hello, yes it is.
Part:
ua-cam.com/video/L8-KsOObSY0/v-deo.htmlsi=VFADeTZVGfJRvi_1
When I tryed to firmware update, an error accured and never open osilascop again. plese help.
When l tryed an other USB port it worked. Also fnirsi support center soon answer my question and help me.😊
Very happy to hear that things worked out okay! Yes, FNIRSI are quite responsive.
Looks like they removed the firmware from their website. Only the pdf is available :(
Have a look at the software download instructions in my functional review. There I explain that the software/firmware is incorrectly described as a pdf when it is actually firmware.
@@ElectroBananasYT I did and It just opens a PDF. Check for yourself.
You are absolutely correct. I contacted FNIRSI and they reported that the firmware for the 2C23T is currently “under maintenance” and will be updated soon. I assume this means that they are working on a new version of the firmware, so hopefully we will see some new firmware soon. Thanks again for your comment.
7-zip my dude, dont use winrar or winzip
Thanks for the comment and recommendations, appreciate it 🙂
You are okay, but the instrument is very problematic.
YOU CAN'T TRUST IT WHEN YOU TRY BOTH CHANNELS.
Maybe they will be able to fix it in the Firmware sometime.
Then I will consider it.
I agree, It would be great if they could have reliable and stable triggering when using both channels...
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