@@Shnick thank you.

Sorry, I don't give any suggestion about repairing medical devices. If you just want to know how to test components you need to know the fundamentals of electronics and how its basic components work. It's a vast topic that I cannot provide in a comment reply.

@Accidentalscience I respect your concern about giving advice about medical devices, but as I said previously I will be comparing it once it's repaired to the health clinics device, I also don't want to put anyone in unnecessary danger, as for knowing the fundamentals I also agree but don't think it's 100% necessary, my point is you can still repair something without knowing how and why each component purpose, and I could have learned the fundamentals as I went along, but anyway I appreciate your concerns etc Thankyou very much.

@@sloopycat1954 Probably it's my fault for not understanding your description, however I think you got no response from anyone because what you're asking is alike giving a cure without knowing the symptoms and without visiting the patient. In addition, that instrument is a medical device which should be repaired by someone authorized by the manufacturer. That's because if the instrument gives wrong values it could lead to taking bad decisions for the patient. I'm sure no one would take such a liability. I understand that if you live in a remote location that would be a minor issue for you but again it's hard to give any advice with no information, in particular because diagnosing a fault remotely takes 10 times more effort (AKA a LOT of time) than having the device on one's hands in a lab setting. Sorry for not being helpful.

@@2ndlecky30 please give a look at my website. If you don't find it please let me know here.

@@AccidentalScience Hi again, thanks for replying so quickly. I have been unable to find your website but looking through your stuff on facebook you sure have some very interesting projects. Where do I look please?

@2ndlecky30 thank you for giving me feedback about the issue you can't find my website address. I see it is missing in the description indeed. Both on Facebook and the website address have the same name of the channel. Https://accidentalscience.com Feel free to comment here if you still have troubles. Cheers, Claudio.

@@Gazgekko-q5f can't give you numbers (search online for the dielectric of water at various temperatures) but it is significant.

@@leiferickson3183 great comment! Thank you. I completely forgot that when I filmed the video.

@@peterfowler8044 I am one of them.

@@user-lm1wu8ny8r AFAIK it is usually the case, but I don't know if it is used in *all* controllers. The data sheet should specify which type of ADC they use.

@@anithasshenoy6662 check the video I made: one is about a poor man differential probe and the other one about a simple DIY diff. Probe. Cheers.

@@AccidentalScience Thank you for responding. Most youtubers don't respond to genuine queries. Thanks

@anithasshenoy6662 you welcome. Sometimes it happens that it is not possible to respond as soon as the notification arrives and then it's easier to forget it. So I think it's not for disregard that many skip to reply to comments.

@@TimeSurfer206 thank you for pointing out that. I don't remember if I mentioned it in the video but being my system configured as UPS it already has that transfer switch inside of the inverter. This is common for many modern inverters.

@@AccidentalScience I wasn't speaking to you, but to everyone. Some things need to be said out loud and often. The installer, whether Homeowner or Pro, needs to make sure it's there. I am that Safety Jerk who has called Labor and Industries when I found a homeowner using a Suicide Cord on his generator.

@TimeSurfer206 that's why I appreciated your comment.

@ Ah, I see you too are another fan of "Stating the obvious." It's amazing how few of us truly realize that "The obvious" is one of the easiest things to overlook. In all of the books on the variations of Murphy's Law, my favorite by far is, "Any time you think you know what you're doing, you need to look again." I double and triple check my work, and look forward to the Inspector giving it a final look-see. Tradesmen who hate the building inspectors bother me just as much as the Piglice that hate Internal Affairs.

​@@TimeSurfer206​ I re-watched the video to refresh my memory. First off the purpose of this video is not to tell others to DIY this kind of installation but to explain how modern inverters are made and the problem I noticed after my experience. Second but not less importantly at 1:26 mark I clearly stated that the described inverter internally has a breaker that interrupts the continuity when there's no voltage from the grid. I also added the motivation making crystal clear the risk of injuring a power line operator if that part would have been neglected. Because yeah while it's easy to overlook what should be obvious, especially for experienced people, I try my best to "state the obvious". Cheers.

Hi Steve, thank you.

@@leiferickson3183 thank you. Really interesting I never had the opportunity to get one. How do you bond it to a conductor plate?

@@AccidentalScience They had wires attached. I thought I put a part number in the previous post but it isnt there.

Thank you for commenting, please check out the experiment #3.

P.s. The microphone is already shielded. Underneath the sleeve it is all metal steel.

I trust that it is not the EM fields but the easiest test would be to perform the test and then simply remove the tube and material and repeat the test and note how much noise is picked up. I have watched enough of his videos that I am comfortable trusting his work.

@@leiferickson3183 Thank you for the trust. Yes I actually did that but I didn't film nor mentioned it because I thought it would have been too pedantic. There is some hum that is picked up, and it is audible but it is approx. 10 dB lower in amplitude. The experiment #3 definitely demonstrates this. You can hear the music, and the hum. Here the music component is a bit less intense because the LED I used is just 1200 lumen Vs. 4500 lumen of the projector. For full disclosure and clarification, please notice that I mixed the original music in the video only toward the end of the experiment (when I touched the microphone, and when I started to describe the setup, at 7:46 mark) for entertaining-cinematic purpose. If you pay attention you'll notice that the added background music is slightly out of sync in respect to the recorded sound. I didn't even fathom that someone would have had thought that this was a fake presentation, because I don't see the point in doing this in the first place. If I fail in doing something, simply I make a video about the failure. What would be the point of being "Accidental" otherwise? 🙂 Thank you guys anyway for commenting. I appreciate both critics and praises. Greetings from the Alps, Claudio.

@@whyMDO oh thank you, that's touching.

@@whyMDO glad you liked it.

@@lindsayferris1073 thank you and good luck.

@@runemosbaek8472 the plug is an EU Schuko: it has two prongs and blades on the sides that carry the ground. I noticed that others got confused by that detail. Sorry, I should have been clearer on that point.

@@Marbslab yeah. Thanks mate.

@@Marbslab thank you! Yeah ink and stencils. Still nowadays I like making prototypes using ink, before etching the board with the acid. BTW I've seen some of your videos: interesting content. Greetings, Claudio.

@@erwinchandra8714 interesting, how did you manage to shape the lower part of the waveform (the negative excursion)? Thanks for commenting.

@AccidentalScience first i series each one of led with silicon diode (1N4148) and change resistance value which series in gain pot from 3k3 to 15k, and ensured the input triangle within 400mv ~ 600 mv. Used only 9v supply, voila excellent sine wave, too bad dont have distortion meter 😅. Once again thanks a lot.

@erwinchandra8714 gotcha. Nice trick. Thanks mate.

@@rongray8934 thank you sir.

@@antoniodicello1994 thank you. Usually I always show waveforms if possible. This time I had to make a theoretical video only because my tiny lab is unusable for maintenance works.

@@bobbauvian7700 DC. I don't remember any capacitor in series with load. The one in parallel is chosen to minimize the ripple.

@@AccidentalScience parellel that is what I meant. how do you choose the size or values for that capacitor. I know the voltage but what about uf and type

@@bobbauvian7700 thank you for the input, I'll take it into consideration. I will come back on this topic, though the next videos will be about building lab instruments, tools and doing some experiments. Cheers.

Yeah, I think so. Tubes were still a proven technology at the time, while (commercial) FETs were still in their infancy. The tube essentially provides a high impedance pre-amplifier.

@@trofaznimotor901 thank you. Greetings from the not so far Alps. 🙂

@@walker55able I received more than one request like yours, I'll look how this could be arranged. No promises at the moment. However instead of the passive probe I rather make the active version.

@@AccidentalScience Thank you