Multi-Component Tester Calibration / Operation / Comparison (M8 ver. M12864) (4K)

[@johnmcclain3887]

Thanks for a great demonstration, I bought one, kit, for about four bucks, the red one, a couple hours to assemble, calibrate as per your video, and I've cleaned up one box of unknown parts, and segregated them. I would've paid a hundred bucks for one of these, twenty years ago, nice to have now. Thanks again, great demonstration

[@tsbrownie]

I'm glad it was useful.

[@jj74qformerlyjailbreak3]

I really need one of these testers. The one on the right seems to do the same job as the one on the left, but the right one seems better to me. Thanks for doing a showdown between them. It’s helped me make up my mind. I’ll order with your link if there is one posted. Thanks again.

[@Datadog-1]

You can easily calibrate the one with the yellow PCB. Just insert a jumper between 1-2-3 like the other and press test, it will automatically go into calibration

[@tsbrownie]

Thank you, I will try that.

[@steve64464]

Thanks for this info i had no idea this was hidden in the unit :-)

[@rob813mobile]

Both can be calibrated. Just short 1-2-3. Press test and follow the screen instructions. Need a cap > 100nF.

[@RI-ns8wz]

@tsbrownie , I came here finding some data sheet on the left one, and found more than that! Seems that calibration method works fine, too. Thanks a lot!

[@RI-ns8wz]

I am only thinking...: over the "do not dispose" symbol, there are two passthroug pads. What are They for? In some pre-assembled ones, there is a hole ("window") that claims to "read IR codes from remote controls"...but I could not find anywhere info about that. Anyone has?

[@tsbrownie]

Me too, I saw that and can't find anything on it. Someone referenced it, but supplied no info.

[@erintyres3609]

@@RI-ns8wz It looks like they are connected to the crystal. I suppose that probing them would show an 8 MHz square wave.

[@NicksStuff]

The ESR was wildly off on the red one. Have you tested it with more caps? And tested some caps in circuits like it says it will do?

[@tsbrownie]

Have tested it with lots of caps since and it seems to be pretty close. Never tried it with caps in circuit.

[@sincerelyyours7538]

Not sure it matters, but you have a fresh battery in the M8 and a tired one in the M12864. Could affect accuracy. I have an M8 and a GM328, the latter an upgraded version of your M12864. Both these units came with problems. The M8 got stepped on before it arrived and the display glass was broken. I ended up replacing the display - not exactly an economical repair but it did teach me a bit on how to repair these units. The G328 case was hopelessly mis-fit to the circuit board and had to be Dremel adjusted to make it fit. If you're the bumble-fingers type you probably shouldn't try either of these repairs. The G328 also uses a smaller font which allows more data to appear on the screen, which I like. As you say, take the accuracy with a grain of salt, but these units do help in diagnosing good vs bad and in identifying unknown components.

[@tsbrownie]

Good point. I also got another high value cap / inductor meter and after a few months it quit. Seems I will be trying to replace a chip on it per others on the internet with the same problem. Too bad they don't put more effort in quality in these things. I'd rather pay a few bucks more and have them be reliable.

[@putteslaintxtbks5166]

I've been thinking of putting together some electic devices and can get boards and the parts at good prices. One of these units maybe very helpfull to ID parts, so less like to put in wrong ones. Even years ago with better eye sight, it could be hard to ID alot of parts, alot are smaller know too.

[@joeroganpodfantasy42]

Working batteries don't get recognized from this device but a dead one shows up as a diode.

[@RixtronixLAB]

Creative video, thanks :)

[@DonnyHooterHoot]

I have the unit on the left I have found that if I flip inductors over they sometimes read correctly.

[@tsbrownie]

That's an interesting observation. I will have to check that out.

[@IgorArt1363]

Could you tell me what is the difference between the GM328 and GM328A versions?

[@tsbrownie]

Good question. I did a search and everything I could find that claimed to compare does not. I found references to the "A" version from 4 years back, so it's not really new. Wish I could help more.

[@dposullivan]

I like the video, interesting comparison. Are they only available in self assembly 'kit' ??

[@tsbrownie]

I have seen them assembled.

[@qnedim3200]

Hi. If we replace it with a 16 MHz crystal, can we measure more accurately? For the LCR T4 model. Thnx.

[@tsbrownie]

I don't know. To be honest I have not even thought of that.

[@izzzzzz6]

what is the value of the capacitor used to calibrate with? Is it 100nf or 200nf? Thanks

[@jakew7887]

Do you know if it's possible to test two components at a time on one tester?

[@tsbrownie]

I do not think so.

[@MrCacciLLo]

Does anyone know at which Frequency is Inductance tested with this unit? thank you so much

[@tsbrownie]

The specs are in the description. It does not specifically mention inductance, but under capacitance it says it's at 8 MHz.

[@MrCacciLLo]

@@tsbrownie Hi mate, it doesn’t say in the specs or in any other doc at which frequency in Inductance measure. Thats what I would to figure out. Thanks

[@qnedim3200]

@@tsbrownieHi. If we replace it with a 16 MHz crystal, can we measure more accurately? For the LCR T4 model. Thnx.

[@eloycreichmon36]

Great video. To probe pulse transformers it's necesary to know isolation, do you know some equipment to do this. Thank you.

[@tsbrownie]

No, sorry I don't. I've done very rough measurements using a frequency generator and voltage meter, but I think you're looking for something more.

[@eloycreichmon36]

@@tsbrownie Thank you !

[@nikospetroulakis6888]

yellow or red??

[@MuhammadDaudkhanTV100]

Nice

[@keithking1985]

B is HFE or more accurately BETA!!! (the transistors gain)

[@izzzzzz6]

did you calibrate it with a 200nf when it was asking for a 100nf?

[@tsbrownie]

I used the capacitor they supplied. There are lots of numbers they show on the screen when it is calibrating, I assume some are the internal values of the device. So when it says 100 nF, it might be the base line of the device, don't know. The instructions don't explain what is being displayed.

[@izzzzzz6]

@@tsbrownie ok thanks. I don't think mine came with the capacitor, do you know the value?

[@georgeterbush2976]

You mentioned that the tester on the left can not be calibrated but I found a KZbin video of someone doing it. It looks like you are suppose to connect a wire to pins 1 2 3 and turn it on just like the tester on the right. Maybe they had different firmware? kzbin.info/www/bejne/m6GsloZth9Bme6M

[@tsbrownie]

Yes, it is very similar. I will have to check into that. Thanks.

[@georgeterbush2976]

@@tsbrownie Awesome! Thanks.

[@abeditani8293]

What the capacitor number that they send you with it ?

[@tsbrownie]

Sorry I don't recall. It got mixed in with my other caps. It was something like 25pF.

[@abeditani8293]

@@tsbrownie sorry . I was asking about the calibration capacitor that you use

[@tsbrownie]

@@abeditani8293 I understand, but I put it in my cap box and forgot which one it was. Sorry

[@eagle7267]

At 3:10 the tester asks for an over 100nF [0.1uF] at 3:53 it's read as a 220nF [0.22uF]

[@msncom5490]

ty to u but writing was hindered the vision

[@brianhind6149]

Mine arrived with no knob, no instructions & I have yet to figure out how to assemble the damned case !

[@tsbrownie]

I understand. Lots of kits from "overseas" come with zero or poor instructions. Many are less than complete.

[@crusader2.0_loading89]

Mine arrived with no case and no capacitor etc

[@mowwow1998]

mine never arrived

[@TheRetiredtech]

B is Beta

[@dartplayer170]

Hfe AKA Beta

[@DjaniAgain]

I was going to write the same comment! 😁