THE BEST Multimeter tutorial (HD)

THE BEST Multimeter tutorial (HD)


In this video I’m going to cover multimeters
and how to use them to measure voltage, current
resistance and continuity.
First up where do you buy a multimeter?
Multimeters are everywhere. You can
get them at radio shack, sears, dollar stores
wal-mart amazon ebay
whatever is easiest for you.
Okay so how do you choose which one to get?
First up at the bare minimum make sure the
meter you’re looking at can measure voltage,
current, resistance and continuity.
If you can find one that measures capacitance
and temperatures as well
go for it.
Unless you’re working with some super special
application don’t worry too much about accuracy.
+/- 2% is usually good enough
and even cheap multimeters these days will
be that accurate or better.
Next the multimeter should have a digital
display not that old school analog crap.
And it should have automatic ranging functionality
for as many things as possible.
Trust me don’t waste your time screwing around
with manual ranging.
If you’re too lazy to shop around just get
this one. Fifty bucks, it’ll do everything you
need and you won’t outgrow it anytime soon.
Okay so now you have a multimeter – how do you
use it?
Let’s start with measuring DC voltages.
First check the cables.
Make sure the black lead is in the jack labeled
COM or COMMON.
And once it’s in there you’ll never need to
take it out because the black lead always
goes to COMMON.
The red probe on the other hand is something
you’ll have to pay very close attention to.
If you plug it into the wrong track you will
blow a fuse in your multimeter.
We want to measure voltage right now so I’m plugging
the red lead into the jack labeled Volts
not Amps.
Next, set the dial to measure DC voltage.
Touch the red probe to the positive terminal
of your device and the black probe to the negative
terminal of your device and you should get a
voltage reading.
If you get the wires backwards that’s ok you’ll
just get a negative reading on your multimeter
and that’s actually a good way to figure out
polarity.
Now you can measure voltages in pretty much
any DC circuit as long as you’re careful
to not short anything out with the metal probes.
Okay let’s move on to measuring AC voltages.
Set the dial to the AC voltage setting and again
make sure the red lead is in the jack labeled Voltage.
Touch the probes to the AC voltage
source that you want to measure and you’ll
get your reading.
As long as you don’t touch metal parts of
the probe or short them out this is perfectly
safe.
And as you’d expect there’s no AC voltage coming
out of this DC battery.
Measuring resistance is easy too.
Make sure the red lead in the jack labeled
ohms for resistance
and set the dial to the resistance setting.
Here is me measuring the resistance of the
skin on my hand. Here is me measuring the resistance
of a resistor.
And here I am measuring the resistance of
a speaker.
Now you might be wondering if you can measure
the resistance of something in a circuit.
Well unfortunately it most likely won’t work.
You’re going to have to remove the resistor from
circuit before measuring it.
Next let’s talk about continuity.
Measuring continuity basically just means
checking whether or not there’s a good connection
between any two points in the circuit.
To measure continuity make sure your red probe is in
the jack labeled continuity, (or in my case resistance)
and set the dial to the continuity setting.
Yest that the continuity function is working
correctly by touching the probes together.
Whenever there is almost zero resistance between
two points the multimeter will beep.
You can use the continuity function to check
if cables are internally broken or not.
In the context of circuit boards, if there’s a
good copper trace between any two points
the multimeter will beep.
If the circuit board is messed up, no beeps for you!
Finally let’s use our multimeter to measure
current.
Set the dial to Amps setting.
For almost all multimeters there’s going to
be a separate jack just for measuring current.
My multimeter has two. One for currents up to 10 amps
and one for currents up to 400 milliamps.
I usually start out with the Amps jack but
if I need more accuracy I can switch to the
milliamps jack later.
Now measuring current is a little trickier
than the rest of things.
I can’t just touch the probes and get an
Ampere reading.
In order to see how much current is flowing through a
wire, I have to cut the wire, and splice in
the multimeter in series with the flow
before I can get a measurement.
Here I have a simple circuit with a battery
pack, a motor and some wires. In order to
measure the current drawn by the motor, I cut
the wire, splice in the multimeter,
and now I can see that the motor is drawing
sixty milliamps.
If I want more accuracy I can switch the milliamp
setting
and now I can see that the motor is drawing
somewhere between fifty seven and sixty
three milliamps.
All right thanks for watching and have fun
with your new multimeter!

100 Replies to “THE BEST Multimeter tutorial (HD)”

  1. Recommended multimeter: http://www.amazon.com/exec/obidos/ASIN/B0194VGLFS/afromods-20
    High quality electrician grade multimeter: http://www.amazon.com/exec/obidos/ASIN/B000OCFFMW/afromods-20

  2. There's something very satisfying about using and reading the old analog crap. We had to use it couple times at school and it's pretty satisfying seeing the needle jumps and eventually stable down to the reading. But it's probably just me perving over mechanic instruments.

  3. Hands down, one of the top two clearest and most informative videos on the purchase and basic use of a multimeter.

    For about six years I was a subscriber to a different electronics channel and for the most part got a lot of entertainment from watching it, although surprizingly very little education. However the guy's attitude towards expensive equipment finally went too far for me. I am now a 'Big Clive' subscriber and your channel also. Critically you both give basically the same advice–the best multimeter is the one you can afford to buy.

    I look forward to watching the rest of your videos.

  4. Just a note of caution: Multimeters have a finite amount of amps you can send through them when testing current, usually written on the front. If you exceed this you will blow a fuse and possibly brick your multimeter

  5. Again and again, want to say thanks to the people who work at youtube . And
    people helpers who help educational videos like these .

  6. FYI, lots of DMM reviews around. Those cheapo's you get for $5 are dangerous for anything above 12-24v. Check all the teardown video's and you'll see they all skimp on fusing, and even bad soldering can cause arcing. I've got a bunch from HF because I always have a coupon for a free one when I need to buy some small part or tool. Never realized just how shoddy they were until watching some vids. I wouldn't test mains voltage, or anything much above 24v maybe.
    Fine to have one in the trunk to test continuity or 12v or alternator output voltage. Not sure ATM if they can test current, however even that I just wouldn't bother with.

  7. Quite useful. I always wonder what sort of people down vote these kind of videos. If any of the 869 people who down voted this found a mistake or something, they should come forward and share it, instead of simply down voting a great video.

  8. Whilst checking a car battery that has been removed from the vehicle and charged up fully, am i getting a weird reading of 1. Yes 1 or other strange numbers instead of 12.6 etc to test the battery. I am wondering if i am testing it wrong or my multimeter is faulty even tho its pretty new. I am testing mt battery same way you are at 1:35

  9. DO NOT BUY A CHEAP METER IF YOU'RE GOING TO DO LEGIT ELECTRICAL TESTING OF. IT WILL BLOW UP IN YOUR FACE OF YOU'RE NOT CAREFUL WHAT YOU USE AND WHAT RANGE SETTINGS YOUR USE.

  10. thank you, your tutorial helped me to understand how to use my multimeter to diagnose electronic problems. The tutorial is very easy for me to follow and understand

  11. Thank you for this tutorial. I've had a multimeter for a few years and never really known how to use it. I sort of guess what I need to check and poke whatever I'm checking. Guess I'm lucky I haven't blown a fuse the few times I've used it. This video is really helpful for me starting to understand what I should be doing.

  12. so brief and yet packed with so much information, i wish you could continue doing more videos on multimeters

  13. At time 2:08 i thought that the shorter plug or prong on that socket was negative or hot. the red lead on the meter is the positive 🤔🤔🤔

  14. old school analog is not crap. beginners should learn the basics.and should learn analogs. anyway. great video tutorial.

  15. Multi meters are fine .However the application makes a difference. In different fields of work. A analog meter will have to be used in different fields. The analog meter cannot be beat for finding ground faults in the fire alarm industry. This is only one example despite you saying the analogue is garbage. It's the most inexpensive equipment to find faults even if there are more expensive and correct way but not as quick way to find problems. GOD BLESS.

  16. During my final year at school in 1984, I I got a Fluke 77. It is still working to this very day. Thirty five years later.

  17. “Where do you buy a multimeter? Well multimeters are everywhere! You can get them at Radio Shack. You can get one at Sears…”

    What? 😳😂

    <checks upload date>

  18. Uuh what do i do if i have an older multimeter with only one red jack? It is labeled V/Omega. Even tho there are 2 ACA dial settings

  19. Im really glad you pronounce multimeter properly rather than the rest of america with there mul tie meter 🙂

  20. Wow, wow and wow! The most straight to the point video on youtube that I have seen in a very long time!! Thank you, thank you and one extra thanks for good measure!!!!!!!

  21. I just screwed up the fuse while measuring the current by connecting it in the wrong way until I am seeing this video

  22. "Next, the multimeter should have a digital display, not that old school analog crap…" LOL! I knew this was the video for me!

  23. I can't believe that this 9 year old video is still much better than the videos made nowadays, I understood whatever you said you are also fun to watch! Subbing to you right away!

  24. I turn the video off soon as you start said that my multimeter was crap. Most folks don’t spend fifty bucks on a multimeter.

  25. Very nice. I didn't find what I am looking for but what a great video for beginners such as myself. What I am looking for is when finding a good ground on my motorcycle, how do I know its good? If the motorcycle runs off a 12V system and I am looking for a good ground, what measurement should I seek?

  26. Why did you say "Analog crap" Sure they are limited compared to the old VTVM's (Analog also) but these old meters have some advantages. When using the ohm scale you can check a capacitor (depending on capacitance and scale setting) watching the D'Arsonval movement (needle) showing the charging/discharging action. Back in the days of troubleshooting down to the component level, you could check out transistors and determine which was the base, emitter and collector. I still use an analog VOM instead of using a DVM and wait on some models for their slow sampling rate.

  27. Old school analog crap…unless you want to watch something change, see a cap charge, that kind of crap. Sometimes an analog display is EXACTLY what you want, to see a trend.

  28. Good instructor! You might do one on analog meters anyway, never know.. they are great for voltage spikes, fluctuations and diodes.

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