Measuring Resistance with a Digital Multimeter

[@ezekielhadad1407]

Finally an easy to comprehend tutorial! You are the best! Thank you.

[@tonylars4128]

Kudos for the Video clip! Excuse me for chiming in, I would love your initial thoughts. Have you heard about - Runayslarn Survival Manifestation (do a search on google)? It is a good exclusive guide for discovering how to repair your electronic items minus the normal expense. Ive heard some amazing things about it and my old buddy Taylor finally got excellent success with it.

[@ezekielhadad1407]

pavel mihai no I have not heard about that. I will do some research, hope to find It.

[@nolongermaestra]

I have had one of these multimeters for years, but never had to measure ohms. You did a wonderful job in your explanation without going overboard on other details! Wow. You are a great teacher! Thank you.

[@thetooginator153]

Good work on this tutorial! A lot of tutorials spend time describing what a resistor does or what resistance is, but you got to the point quickly and only pointed out the importance of having no current flowing through the resistor. That is an important thing that some people might no know, but is very relevant to your tutorial. My color vision isn't great, so reading those tiny bands is basically pointless for me, so this tutorial told me what I needed to know. Thanks!

[@frankturneriv]

This is a great video if you have never really used a meter before. I appreciate you going over the basics!

[@Eurospec73]

Thank you for posting this video. I was looking to do a resistance test for my electric fans on my car and I wanted a better understanding of how it worked now, thank God I know that I cannot have power going to the source when doing a resistance test thank you for sharing. Great video.

[@fabianmarreroarce7377]

Thank you for refreshing my memory on how to measure resistance sir. Have a great one. 👍🏼

[@ismailtaiwo2034]

This is the third video i have seen in this series, how to measure quantities of electricity. This videos are easy to understand and straight forward... Thank you very much you just helped me

[@deodea]

Thoroughly and simply explained. Thank you!

[@novaknovakovic1585]

Nice Video! Forgive me for chiming in, I would appreciate your initial thoughts. Have you thought about - Runayslarn Survival Manifestation (erm, check it on google should be there)? It is a good exclusive guide for discovering how to repair your electronic items minus the hard work. Ive heard some amazing things about it and my work colleague after many years got excellent success with it.

[@masturcheef105]

Well, I didn't need a constant feed of this but I couldn't resist being your 420th subscriber so there you go. Now I get to learn more I guess.

[@aLLDaYeVerydAyAPpLe]

thank you i didn't know now its stuck with me for life thank you so simple and specific couldn't be a better explanation

[@wiserdaley6624]

" Can I measure resistance on a live circuit?.... No!" Lol I have to subscribed lol this fellow has punchlines while being informative lol

[@welshpete12]

lol

[@rawfoodphilosophy7061]

Great job, thank you for the thorough explanation! You answered all of my questions

[@Foxyoso]

Short and VERY informative. 👍 👍!

[@joshdat3reak]

Thank you! I've always used a multi meter for measuring voltage but never really understood the restistance side. Thank you for your video 😊

[@TherapyWithRicardo]

Nice! Thanks! You're a great teacher.

[@sourianeful]

Thank you! It helped me to figure out how to do it! :)

[@ButilkaRomm]

Can you measure a resistor when it is still connected to a circuit (a motherboard) and the circuit is powered off?

[@billybutcher9912]

Yeah, Dude nailed it...great video.

[@claudioabado6246]

At 2:46, you say "You cannot measure the resistance of a live circuit" -- why?

[@woodruff3799]

Because you will damage your test equipment.

[@MrPlutooooo]

Omg it was that easy. I kept trying to measure in a live circuit lol.

[@jamesb.jacobson2733]

Kudos for the Video clip! Sorry for the intrusion, I am interested in your opinion. Have you thought about - Franaar Shining Shape Formula (should be on google have a look)? It is a smashing one off guide for revealing the secret to repair your electronic devices without the headache. Ive heard some amazing things about it and my friend Sam at very last got astronomical success with it.

[@famousamoss]

Extremely helpful...thanks!

[@Good-Enuff-Garage]

you explain things beautifully

[@jsmokzalot9238]

So what does it mean when my resistance starts at (setting on 2k) 1.65ohms then immediately drops to . 002 then 001 then 000?

[@GMinfoTech-cf8gf]

this is great bcause some of old digital or analog tester cant read 2ohm very low resistance at its beeping on digital telling it is shorted. thanks man

[@eslamesam5854]

Thank you so much !! . its easy to understand .

[@petergamston1]

If your circuit had a switch could you measure the resistance simply by switching off or do you need to de-solder if its in a component?

[@MrChanPhysics]

Peter Gamston you must disconnect at least one lead from the circuit before measuring the resistance.

[@SRRIwant]

Why do we measure resistance ? of measuring voltage or current?

[@babykilla999666]

love the quiz at the end lmao thanks

[@notpurple]

Thank you. concise. very nice. and you just happen to have the exact same meter too, which helps.

[@jeanchrinot]

Enjoyed it!! Thank u so much!!

[@d2vmusic]

Thank you, very useful information.

[@davidbutcher6637]

Really helpful thankyou

[@anissbenthami]

Thank you sir very good tutorial

[@WILLY52368]

What reading does my meter has to be on to measure a resistance for 360-440 ohms pulse generator for my motorcycle?

[@tallldarkandhandsome216]

Fantastic. Thank you....

[@Matt-vb2jo]

I am trying measure ohms of fuse relays in my car. Do i need to pull the relays and check where they plug into the box, or remove an check the relay? I figured both. The battery is disconnected btw.

[@jessethebaldyventura2391]

Excellent video, Mr. Chan. I like how you showed a wrong a right way to measure resistance. I also liked the quiz at the end to make sure we're paying attention. Are you a teacher by chance?

[@MrChanPhysics]

Yes, I am a physics teacher.

[@ellenphilpotts-troy2098]

Does fuse is consider a resistance? Can you know is a fuse work or not through resistance?

[@MrChanPhysics]

You can treat a fuse like a low-value resistor. Ideally it should be close to 0 ohms. If the fuse is blown it will display an over-range (“1 .”) or blank on the meter

[@lincoln6981]

Can resistance be measured with pins in a connector? Like for a car. Need to measure resistance for the chassis and comfort networks. And tbh I have no idea how that's done lol

[@andym5195]

i gotta ask ! 1 why cant you do it whilst its in circuit ? and 2 what difference if you did do it ir circuit then what difference would having it read whilst voltage flowing or no voltage? also ....do you think it would make any difference if you made very short probe wires what for measuring resistance? ps great vid !!

[@Googlename699]

When I measure ohm by fluke, it starts with a big number then goes down to a number. Why it does that? (e.g starts with 315.7 ohm then decrement down to 150 ohm)

[@abdulrasheedp.p3746]

Thanks. helped me today

[@stewartbruce2409]

Thank for your easy and informative tutorial. What always confuses me is the different settings in the ohm sector on the hf multimeter; and how to select the correct one?

[@sirpolaris7872]

Very easy, thank you so much dude

[@robertskiffington-singalon5423]

The best tutorial,

[@conker33350]

Helpful thank you.

[@Ting33s]

My meter has a flashing dash on the screen when I have it set to resistance and I’m touch the two probes two each other or measuring resistance on anything.

[@madbrit5053]

i have the same meter as your using, but how do you read a resistor at the other settings like 200k or 2000k or 20k what do they mean ?

[@vintage76vipergreenBeetle]

Great info.

[@bilgls5]

Thanks ideal for me 👍

[@simonnather4053]

Hey i know that you can measure cold ohms. But for warm ohm ? Is there an instrument for that ? Cus you cant measure cold ohm in a motor Or the new led lamps..... Only resistors and verry old lamp. And thats like it......

[@gonkuz]

Nice Tutorial.

[@dunnkruger8825]

What’s purpose of measuring ohms/resistance?

[@georgiabigfoot]

This is helpful thank you

[@TheRealCus]

My multimeter is weird I have the wires in the right place (EX) black=com Red=the one right above that and it shows negative. YES IM AM PUTTING THEM IN THE RIGHT PLACE, my question is should I be worrying about it?

[@jamesallen6007]

Many thanks. 🇬🇧👍

[@woodruff3799]

You only used 1 resistor and you only used the scale at the bottom of the ohm meter. Would have been nice to hear you explain the difference of the other values on the scale.

[@guillermocanchan8666]

If you disconect from power is ok to read the resistance

[@MrChanPhysics]

guillermo canchan No, you must disconnect one or both leads of the resistor you wish to measure. Even if you turn power off, there are other paths thru the circuit that your meter will measure. So you must isolate the device from the circuit.

[@jumbo999614]

Let say i want to test resister of 4.7k ohm then i have to set a scale to 20k right? What will happen if i set the scale wrong? will it break my multimeter? I'm very new to electronics.

[@MrChanPhysics]

Yes, 20k scale is good

[@perryjones8997]

why am i getting a measurement of 0.2 ohms when i touch leads together....Cen-Tech meter...(200 ohms setting)??? Great tutorial!!

[@craftsmanbyheart]

I learned to always check the baseline of my multi-meter before testing ohms of any circuit. Each use.. each day.., or more often the better. It's done by selecting the setting you may need and first verifying the infifnite reading (looking at the meter while test probes are apart.. touching nothing) vs the closed circuit reading (looking at the meter while test probes are constantly and steadily touching). I think of that as checking my multi-meter's baseline. The video was showing that very clearly. The perfect ideal is a meter with 0 or as small of a value as possible for a baseline with closed circuit. But often it doesn't always happen to be perfect. I've found this same thing in my own collection of multi-meters. Sometimes the meter's battery is too weak or getting a poor connection, other times its a temperature issue.. Battery's power levels are weaker while very cold, or the components inside the meter are likely to change while they are colder or hotter, many times the contacts in the switch of the meter have a slight bit of corrosion, and whether one of these or a combination is the cause... that's all it takes to affect the baseline of the ohms meter. I have some older analog types of multi-meters that have an ajustment knob on the front that is for adjusting the meter to "fine tune" its closed circuit baseline. I've peeked inside some digital multi-meters and spotted inside some have variable resistors. I suspect these are for the use of the manfacturer's to set the baseline of the meter and or other fine tuning requirements that must be set at prior to final inspection and assembly. Great video. I hope my observations and comments helps.

[@naderhumood]

Tank u Sir appreciated your vedoo it's v useful

[@Stephen-lt1tp]

Why can't you take the ohm reading when there's volts through it?

[@MrChanPhysics]

The meter measures resistance by applying a very small voltage across the resistor and measuring the current through it. You cannot measure the current through the resistor without disconnecting it. If you try to measure the resistor in a live circuit, there is already an applied voltage and current flowing, so resistance will not be properly measured.

[@jvclarke1]

Although not often taught - circuits actually run negative to postitive

[@MrChanPhysics]

In most circuits, negatively charged electrons move from negative to positive. However, "current" is defined in terms of positive charges, so it flows from positive to negative. Ben Franklin named the charges + and - back in the 1700s. However, the negatively charged electron was not discovered until the beginning of the 20th century , long after the convention of positive current was established by physicists and engineers. So the definition of current relies on a "flow" of fictional positive charges. It's equivalent in math is adding 2 positive numbers is equivalent to subtracting a negative number.

[@saintpeter1802]

Hello teacher i have a question suppose the bettery is 220 volts AC ; and resistor 220 kΩ (220 000 Ohm); bulb is ME current = voltage/resistance 220/220 000 = 0.001 amps ( 1 milliamps) if my math righ so i think, i don't get electrocuted because 0.001 amps is low current flowing through me thank you very much

[@asifnawaz5062]

please add the link with every video.

[@jbutlerguitar]

Doesn't current flow from the negative end to the positive end and not the other way around? You say that it flows from the positive to the negative but that doesn't seem correct.

[@MrChanPhysics]

You are correct, but physicists, electricians and engineers consider current to flow from positive to negative. This follows a convention established by the esteemed Benjamin Franklin (yes, $100 bill guy). Old Ben identified 2 opposite types of charge but did not know that it is actually negative electrons that travel from negative terminal to positive terminal. Electrons weren't identified until the turn of the 20th century. So we think of fictitious "positive charges" flowing + to - instead of negative charges going - to +. Resulting charge flow is the same. Sort of like subtracting negative numbers is the same as adding positive numbers.

[@Shock3Ram]

+MrChanPhysics Thank you for your very educational video and comprehensive comment. I am currently going to school for HVAC&R and the electrical side of it gets a bit confusing. Again Thank you for your time and video. I am definitely subscribed to you.

[@fritzgolden6237]

Congrats to you for learning HVAC. I always tell young guys an HVAC guy can get a job in any city because 99.5% of buildings have heating and/or cooling. Hope you stay with it.

[@andrewsalazar98]

I’m assuming you’re using conventional theory for how electrons flow? Electricians use electron theory where electrons flow from negative to positive.

[@vwbeetlefuelgaugesystem]

You do not need to remove the device from the circuit . Just one end and it makes no difference which end. Good video otherwise!

[@iwishtobetexan6060]

What do you mean by one end?

[@jaspernemesio3816]

He doesn't need to be touching the both ends with his fingers as there is resistance through our body as well.

[@vwbeetlefuelgaugesystem]

@@iwishtobetexan6060 One end of the resistor disconnected or the other, OR both.

[@sh-pa1924]

if it is a 220 ohms resistor, why is it not showing the reading of 220??

[@MrChanPhysics]

Shoaib Sh The resistor is marked as 22 ohms with a tolerance of 5%. So any value from 20.9 to 23.1 is within spec. The meter and probes have about 2 ohms additional resistance

[@jessethebaldyventura2391]

I am measuring ohms on a sensor that requires 4.0 ohms. If my multimeter also puts out 2.0 ohms resistance on its own, then the correct reading I'm looking for would be 6.0 ohms?

[@bmzaron713]

The electrons flow (-) to (+) but I guess it doesn't matter too much in the case of the resistor since you can place it on either side of the appliance/load in a circuit and the resistor will do its job.

[@JacobTJ1]

thank you

[@jtollackson]

what if i'm reading over 200? If I set it to 20k to get a reading and it says 9.8 what are the ohms? Thats an impartant BASIC detail left out.

[@mxfreaks]

I'm wondering the same thing, is it 9.8 Thousand (9,800)or just 9.8? I get no reading on the 200 but on the 20k I get 2.2 ohms which makes no sense, if it's 2.2 why isn't it working on the 20 setting!

[@mxfreaks]

Ok I figured it out I'm pretty sure, 9.8 on the thousand (20k) setting then it is in thousands so 9.8 thousand is 9,800 ohms.

[@_navamusic3054]

Thank u... 😄👍

[@jordonwap5760]

Nice

[@vjnblnum2303]

Awesome

[@darinandalinahouse9596]

I passed the test. Do I win anything? Lol I have the exact same multimeter. I think I got it free from HF. What do the more expensive multimeters do that this one doesn’t?

[@brandonbranham7879]

The meter reads all over on the thing I'm testing and then stabilizes at a low readin, this thing should have about 23ohms but it's reading .0135 ....

[@ViewMyChannelROFL]

WHATEVER THEY ARE PAYING YOU ITS NOT ENOUGH. TY!!!!!!!!!!!!!!!!!!

[@LifeSavingDefense]

The wires alone should get zero resistance but I have multiple of these meters and sometimes they connections to the meters them selves are not good so press down on the connection on the meter or change the batteries if I don't get a zero for resistance on the wires are but more than likely it's simply because the wire connections are not tight to the micrometer

[@1MCFOX1]

cheers

[@cali_misfit1387]

My multimeter has the OHM measurements by mA

[@cali_misfit1387]

150mA or 15kmA

[@zanegaming6253]

eye like it.

[@tonywright8294]

You included the resistance of your body by holding the probe ends with both your hands ! Definitely a no no

[@nomadprospector7093]

Electron flown is from negative to positive. You got it backwards

[@visualartica7170]

like si estas por el cole XD Marcianito LOL

[@johnsuarez1404]

Wtf your leads are 2 ohms that's a lot no?

[@saidkhan-cn6ey]

18650

[@phasorsystems6873]

Tired of your EE TA? follow circuit solver on the playstore!

[@dunnkruger8825]

Why Why is that important

[@hungryagain1437]

Sry can't watch a video with guy using harbor freight free meter