AstroAI AM33D CHEAP-O Multimeter Review & Teardown!

#multimeter #astroai #multimeterreview
AstroAI AM33D! This no-frills multimeter gets the job done. A solid 3 Stars!
🌟 ☕️ 🌟 Buy me a coffee ? www.buymeacoffee.com/KeepOnTes...
It really helps! Thanks!
💢TOP 10 CHEAP-O MULTIMETERS💢
A=AUTORANGING M= MANUAL S= SMART
10/05/2021
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[@supermanbeatsthor]

You are overreacting to quite a few things. You having a problem putting the cords in is ridiculous it was not difficult whatsoever. Nice tight fit like it should be

[@KeepOnTesting]

They are called test leads. The generic leads were a lousy fit and definitely don't inspire much confidence. Replace them and you'll be much better off. Not one of AstroAI shining moments.

[@nor-sat3360]

I am from Egypt and I love you so much, may God grant you success 💖💞💖

[@KeepOnTesting]

Thankyou so much..Keep On Testing!

[@anotherone96]

Yes! You followed my suggestion. I already bough it thou. Thanks for doing what you do!

[@KeepOnTesting]

Great news! Keep On Testing 😀👍

[@armandomagana8540]

most detailed review I’ve seen so far about it

[@KeepOnTesting]

Thx Armando!

[@avimango46]

Looks just okay! The leads fits after a lots of pressure! Any method to find Cranking Current Amperage of a Car Battery?

[@asweatherbee11]

What is the lowest AC volts this can measure?

[@neilt5272]

Hi Darren, I'm trying to understand your diode tests. Voltage drop on diode I understand. But with the LED tests thereafter, was the expectation that you'd see a voltage drop there too? Also does this unit display 1 instead of OL for an 'Open Line' situation?

[@KeepOnTesting]

Hi Neil, typically, the forward voltage of an LED is between 1.8 and 3.3 volts. It varies by the color of the LED. A great multimeter will display the LED fv and illuminate it as well. This dmm reads as OL for Open. 👍

[@barbaram.2994]

How do I test my body voltage? This is all new for me.

[@TRONMAGNUM2099]

I think I paid 11 bucks for this meter to have as an extra one. Every home owner should have one at this price to make sure they don't electrocute themselves. I think it's nicer than the free one I got at harbor freight. I think that meter is great too. I notice all the cheap meters are accurate enough for basic testing. Durability is where they fail. If you are going to use only once in a while a sub 15 dollar meter is fine. One last thing. I have been a field tech for 20 years and I have never seen anybody do the tap continuity method. You hold the meter firmly on the test points and give it a second.

[@KeepOnTesting]

Great feedback!😀👍As a former systems integration lead while pcb troubleshooting I can tell you there's multiple ways to do a continuity test . Fast tap demo simply shows the quickness to latch .Yes in the field you probably wouldn't use this but it doesn't negate the test itself. Build wise, It's an OK multimeter for the price but still there's better for just a few bucks more.

[@kenweiss6720]

What is the replacement battery?

[@melvyniandrag]

12:00 this is the only meter I have and I've used it for over a year without a problem. I just thought all multimeters took 10 seconds to beep for continuity. Hm so maybe it would be worth it to upgrade one day. But without a doubt this thing does test continuity, you just gotta wait a few seconds for it. We've done many successful repairs around the house and car with this thing.

[@nemonemo6285]

Good review, very entertaining and fun, thank you.

[@KeepOnTesting]

Thx my friend ❤️

[@derektodd4126]

Going to bypass this one and keep my new years resolution. Can only see this at £15 plus a few pounds postage, making it close to 20 quid.

[@avimango46]

How to check a AAA cell or for that matter any dry cell? Wall clock battery 1.5 Volt often requires replacement so we should know when we should garbage it.

[@KeepOnTesting]

I'll address that in an upcoming video! Thanks for reaching out! 👍

[@huhwhat6887]

Does it matter where the negative and positive wire are connected on the more time meter device?

[@KeepOnTesting]

Yes, you should make sure the red / positive is on the positive input jack. Black for common or ground.

[@CYMotorsport]

5:00 I PROMISE you, it's not that difficult haha. you're doing it one handed for some reason. and likely it's your off hand considering the shaking of the video. I actually like how snug it is. Feels secure.

[@robertosauceda]

nice bro, i can repair my multimeter, thanks to you

[@KeepOnTesting]

Awesome Roberto 👌 Keep On Testing!

[@unkowntrooper1657]

No issues with mine so I dunno whats up with yours

[@joule-trix]

Gr8 video! Can u use this meter 4 motherboard testing? Or fixes?

[@KeepOnTesting]

Yes definitely! Only issue is that you can't test capacitors. Otherwise you're good 👍

[@joule-trix]

@@KeepOnTesting ahhh I need to replace a capacitor lol

[@KeepOnTesting]

@@joule-trix amzn.to/3RJDT26 Review: kzbin.info/www/bejne/mIqlgWB-nLOWg7s 👍

[@halrhoads6194]

I would have called it a 2.5 stars given what we saw internally plus the low continuity db's. Darren: have you tried the Autool 14X Test Lead Kit yourself? I'm really tempted.

[@KeepOnTesting]

Yes the Autool 14X Test Lead set is amazing! I have 3 of them. I did a review on them last year...Probably the best value on Test Leads at the moment!💥💥💥💥💥👍

[@KeepOnTesting]

kzbin.info/www/bejne/gGmVlZmKbpKYgM0

[@Rufat011]

The best explanation on KZbin ❤

[@KeepOnTesting]

Thx , that's great to hear 😃👍

[@derektodd4126]

Guess those aliens just fancied a change🤣

[@dogsdogsdogsdogsdogsdogsdogs]

Good video 👍

[@jesseterrell9354]

Iam not an electrician I just needed one of these probably use it a handful of times ever.

[@careyautorepairs]

Cool video Darren.

[@KeepOnTesting]

Thx Carey 👍

[@careyautorepairs]

@@KeepOnTesting no problem brother. It’s Marc Carey ha ha 💪 your account is awesome dude.

[@KeepOnTesting]

Sorry Marc! Cheers 🍻

[@Jimmy_Cavallo]

Positive on the LEFT.?? 🤔 Can you please tell me how long the leads are? Thanks.

[@KeepOnTesting]

Yes, rather bizarre and I'm definitely not a fan of that for simple safety reasons. Leads are about 30 inches or 76 cm. 😁👍

[@Jimmy_Cavallo]

Darren Walker thanks for indicating the lead size. I thought there were complaints about them being too short but 30 inches is not short. You’re sure about the positive being on the left..??

[@olgagedz2908]

Thank you for the video! Keep on testing!

[@billwhitlock]

How about the frequency range of the AC volts? It would be very useful to know if it worked not only at mains frequency but at audio frequencies - maybe up to 1 kHz - or press our luck at 20 kHz?

[@KeepOnTesting]

The AstroAI AM33D doesn't support Hz measurements. It does have a Signal out generator fixed @50Hz.

[@billwhitlock]

@@KeepOnTesting I wasn't talking about measuring frequency itself. All AC voltmeters have frequency limitations. Some will only measure accurately at 50 or 60 Hz power/mains frequencies and become very inaccurate when the AC frequency is only a few hundred Hz. For audio work, voltmeters that remain accurate up to 20 kHz are valuable. If I were evaluating multimeters, it would be something I'd check ... and it's not difficult to do.

[@KeepOnTesting]

@@billwhitlock Roger that.. some higher end meters have ac voltage measurements up to 100kHz - but these are $$$ ,, most CHEAP-O multimeters are limited to 1kHz or less. True RMS or not will also play a role.

[@billwhitlock]

@@KeepOnTesting Understood - just thought this might be a truly spectacular value. And, yes, my Fluke 187 was way more expensive (I can't believe they're now $500-700 used! I've recommended this AM33D for some students of mine and your tear-down convinced me it's an excellent value for the money. Thanks! Bill Whitlock, Life Fellow of the Audio Engineering Society, etc, etc.

[@KeepOnTesting]

@@billwhitlock It's a great question Bill... there's definitely a max frequency limitation with any multimeter. Where that limit lies really depends on the meter design, component quality, capacitance , filtering etc. I wouldn't expect to much in the CHEAP-O Realm though but you never know what surprises might be hiding! Perhaps I'll implement such a test routine in future reviews. Btw, any input you have regarding any specific testing methodology you'd like to see used for such a testing scenario would be beneficial. I appreciate the feedback as always nice to get ideas on how to improve the reviews 😀

[@evanob89]

I tried to use the AM33D to measure microfarads (AC condenser capacitor 35/5 microfarads) unsuccessfully. Is that out if range for this multimeter?

[@KeepOnTesting]

This multimeter does not measure capacitance so don't even bother 😮👍

[@evanobrien864]

Thanks.@@KeepOnTesting

[@alejandrotobienne8220]

What selection let’s you test resistance in ohms ??

[@KeepOnTesting]

Resistance is Ohms, Ω put the selector switch from 200 - 200MOhm.

[@AdoomX23]

This multimeter is amazing. Though i came here hoping to see you do some sort of trick that allows you to measure capacitance and inductance. Looks like this multimeter just can’t do that

[@colinfrankel8930]

What is the range of dc voltage this can measure

[@KeepOnTesting]

200mV-500V DC

[@derektodd4126]

Have a couple of bigger brothers and like them alot. Not a bad unit for the price point, less than a tenner GBP. But don't need it but........

[@KeepOnTesting]

Sooo many buts...but I know what you mean ;)

[@janeroth7]

Which button is resistance impedance? I see resistance nothing for impedance. Just got this device. I not to mechanical, can I injure myself with this device☄️

[@KeepOnTesting]

There is no button for input impedance. To measure the impedance, you would need to insert a shunt (or known inductance) into the circuit, then measure the voltage drop across the shunt while also measuring the voltage.

[@KeepOnTesting]

The ohm (symbol: Ω) is for measuring resistance.

[@bens4446]

My leads plug in just fine. It helps if you don't spaz out when pushing them in.

[@KeepOnTesting]

Spaz..jeepers creepers how old are ya anyways ??

[@bens4446]

@@KeepOnTesting Let's just say things were really rad when I was growing up.

[@KeepOnTesting]

@@bens4446 All good.. I thought I was the only guy still saying spaz.. 😃

[@derektodd4126]

Do you get those crop circles in Canada or is it just England?

[@KeepOnTesting]

Yes indeed! That phenomena started appearing in Canadian fields at least 30 years ago..💫

[@Baerchenization]

Everywhere where there are losers who still think they are original making them.

[@chrisruiz1215]

How do you test a car battery what setting do I put it on

[@KeepOnTesting]

Set the selector switch to the 20V DC position , That's V- 20 Btw, (V~ is AC VOLTS, not for testing your car battery).

[@chrisruiz1215]

@@KeepOnTesting thank you

[@martinarmendariz8175]

I ordered one yesterday and it got here today I’m trying to use it but it would not turn on would you know why?

[@KeepOnTesting]

Have you tried fresh batteries? Also, open it up and see if there's any flux on the pcb then try cleaning it with IP might be causing a short.

[@martinarmendariz8175]

Darren Walker I’ve only tried the battery it came with.

[@KeepOnTesting]

@@martinarmendariz8175 Definitely try a different/ new battery...many times the older shipped batteries are not adequately charged to power up the unit anymore.

[@martinarmendariz8175]

Darren Walker it was the battery I tried a new one now it’s functioning.

[@KeepOnTesting]

@@martinarmendariz8175 Great 👍

[@donnieedwards518]

List of symbol’s

[@mattlopez8889]

Does it measure amps?

[@KeepOnTesting]

Yes, up to 10 Amps high current.

[@artest7]

Will this test 110-120 AC Current?

[@KeepOnTesting]

You mean 110-120 volts, AC...Yes

[@thelittleredbarn174]

I can't even get mine to turn on. We're batteries included?

[@KeepOnTesting]

Put a fresh pair of batteries inside...might be a simple fix.👍

[@thelittleredbarn174]

@@KeepOnTesting thanks it was defective I returned for one that works

[@KeepOnTesting]

@@thelittleredbarn174 Good stuff!

[@BiologyIsHot]

you should get rid of the frosting effecting around the edge of your videos

[@CarlosGarcia-tq6do]

I bought one just like it, and it has less than 2 mega ohms of internal impedance.

[@TheJosephayal]

Can i measure vulva volts?

[@KeepOnTesting]

I'm afraid to ask 😅

[@TheJosephayal]

@@KeepOnTesting lol

[@streetmech8026]

My question is. Can it get the job done?

[@KeepOnTesting]

Depending on your needs...definitely 👍

[@cmstaker2]

This girl had zero problems getting the leads in. I like it so don't knock it.

[@KeepOnTesting]

You rock girl! 😊👍

[@paedahe4975]

I got one for free off Amazon with some weird promotional code going around on Facebook.

[@KeepOnTesting]

Free is good 👍

[@paedahe4975]

@@KeepOnTesting what setting do I put it on to test 20v drill batteries?

[@donnieedwards518]

List of symbols

[@Okurka.]

17:20 *you're* magnet is drooping SMH

[@KeepOnTesting]

Hate it when that happens 🤣

[@kenweiss6720]

Nevermind, it uses a 9 volt battery.

[@ogr7771]

I work at a Boy Scout summer camp and I teach Welding, Metal Working and Home Repair merit badges boy and girls, 4 classes of each merit badges 4 seasons a day 5 days a week! I have two 17 year old staff aids helping me, with up to 8 kids per class per Sesson, it bout killed me last year so this summer I got more prepared and I bout 8 of these meters so no need to share, and at only $11 if they make it through the summer then I'll be happy to just give them away to the Scouts in the last week of camp, great review, thanks.

[@KeepOnTesting]

Hi Bill..Great to hear that the younger generation has teachers like yourself who are willing to help. Do you teach soldering or any sort of pcb repair/ troubleshooting? 👍

[@connersbuilds993]

Hey bro size doesn't matter

[@KeepOnTesting]

Says the guy holding the tiny multimeter 😁

[@Ninoy2059]

Wow I thought I was getting for 20 dollars a Mercedes Benz.

[@KeepOnTesting]

Mercedes are crap. This is better.

[@damniamdaone]

Was this recorded in heaven? Wtf?

[@GEORGE-jf2vz]

Looks like a bunch of fake Amazon reviews. But, it is a 16.00 meter.

[@KeepOnTesting]

Lots of reviews on Amazon definitely...but take them with a grain of salt 😀👍

[@MMAsFather]

That's because the positive goes on the right with this meter

[@arthuraster565]

just make the video 8 seconds and say you hate the multimeter... would be much easier

[@KeepOnTesting]

Awwww, what fun is that? 3 Stars 🌟 ain't bad my friend!

[@arthuraster565]

@@KeepOnTesting touche! hahahah. well, guess what I realized.. this thing doesn't measure capacitance.. so i went on line to buy one that did and it was twice the price of a capacitor.. I bought the capacitor instead.. haha

[@KeepOnTesting]

@@arthuraster565 Well there you go !😉👍

[@arthuraster565]

@@KeepOnTesting gave you a thumbs up on your video .... you changed my mind with your personal touch.. thanks!

[@KeepOnTesting]

@@arthuraster565 Anytime 😊

[@anonymoususer5794]

It's a $12 multimeter. You're stunned that it's cheaply made. Hilarious.

[@KeepOnTesting]

Did you watch the entire video? I said it was a decent built multimeter and gave it 3/5 stars. Only stunned by by your dumbfounded comment. 😂👍

[@mccainjay]

Your criticisms are exceedingly petty.

[@KeepOnTesting]

So is this comment 🤔🤏

[@Ajvideo009]

Really this dude is not looking at value. For this price range he is expecting too much. They also have higher end multimeters. This is good for college kids and Hobbies not for professional.

[@MadScientist1001]

"cheap plastic"?.. I swear .. people complain too much about the quality of plastic... I see this complaint way too much on amazon and other online stores and it's very annoying.

[@KeepOnTesting]

Plastic is manufactured in various grades, believe me, there are some incredibly well designed 👌 plastic enclosures but these use high quality molds and plastics. Unfortunately, this AstroAI just didn't impress.Stay tubed for a new AstroAI review coming very soon and you'll see a definite improvement 👍

[@MadScientist1001]

@@KeepOnTesting yah well.. plastic is plastic. I'm satisfied with pretty much anything as long as it doesn't break as easy as a toothpick. I'm saying that people are picky.

[@Fnllyfree5]

Can i measure earthing/grounding with this? What setting?

[@KeepOnTesting]

Yes...To measure ground resistance, you need a long wire, digital multimeter, and metal running into the earth. Disconnect your equipment from any power source, set your multimeter to Ohms, and connect the ground component of your device to a ground rod using a long piece of wire.

[@Fnllyfree5]

@@KeepOnTesting thanks