Introducción
Cada reparador debe saber como utilizar sumultímetro, con el que puede realizar muchas pruebas de circuitos y componentes electrónicos. Sigue esta guía para aprender las tres funciones más básicas de un multímetro.
Part 1: Probando la Continuidad
Part 3: Midiendo la Resistencia
Para aprender a utilizar tu multímetro para realizar mediciones avanzadas como corriente y capacitancia, check esta guia.
Qué necesitas
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Una prueba de continuidad nos dice si dos elementos están conectados eléctricamente: si algo es continuo, una corriente eléctrica puede fluir libremente de un extremo al otro.
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Si no hay continuidad, significa que hay una ruptura en algún lugar del circuito. Esto podría indicar cualquier cosa, desde un fusible fundido o mala unión de soldadura a un circuito mal conectado.
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Conecte la sonda negra en el puerto COM en su multímetro.
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Conecte la sonda roja en el puerto marcado con un símbolo V (en este caso, el puerto derecho).
Why do we need to make sure that no current is running through the circuit?
When there is another parallel branch with 24VDC power and 4-20mA output, the value of the resistance measured comes as zero. Whats the reason?
The way that a meter measures resistance is by sending a small current across the probes and then measuring the resulting voltage. So, another current will disturb your digital multimeter's (DMM) reading.
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Enciende el multímetro, y ponga el selector de modo de continuidad (indicado por un icono que se parece a una onda de sonido).
I want to search the resistance of gold and see if I have some
What does a sound wave look like?
Gold is highly conductive near zero resistance which is why they use it in conducters. Use "specific gravity" type tests or "mass spectromatry" type tests for elements.
Sound looks like sine waves with various amplitudes and cycles per unit of time.
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Si el multímetro no tiene un modo de prueba de continuidad dedicado, aún puede realizar una prueba de continuidad.
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Gira el selector al modo de resistencia.
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Si en tu multímetro el rango es manual, colócalo la resistencia en el modo más bajo.
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En este modo, el multimetro envia un poco de corriente por una sonda y mide lo que es recibido por la otra sonda.
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Si las sondas son conectadas—ya sea por un circuito interrumpido, o por directamente tocando las dos sondas—la corriente de prueba fluye a traves de las dos sondas. La pantalla demuestra un valor de 0 (o casi cero—en este caso, 0.8). Una resistencia baja es otra manera de decir que tenemos continuidad.
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Si ninguna corriente es detectada, eso significa que no hay continuidad. La pantalla demostrara 1 u OL (open loop).
It means you have current flowing which would indicate a good path or circuit. Also means you have a power supply connected which I think was mentioned earlier in the article to disconnect all power supplied, as in a.c., d.c. Especially in a vehicle as running tests on computer module circuits with the vehicle battery connected can damage a computer module circuit..
I'm very pleased to have discovered these directions. Interestingly, I tried the two probes on different sections of a screwdriver – resistance showed very high. Is that possibly because of chrome coating on the screwdriver?
May not be a chrome coating at all even if it looks like it. The screw drivers "resistence" is the result of what alloys are used in the shank of the screw driver ... ie ... tin, zinc, carbon, etc.
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Para completar tu prueba de continuidad, pon una sonda en cada lado del circuito o componente que queries probar.
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Como antes, si su circuito es continuo, la pantalla mostrará un valor de zero (o casi zero).
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Si la pantalla muestra 1 u OL (open loop), no hay continuidad—es decir, no hay camino para que la corriente fluya de una sonda a la otra.
What does it mean when I first get 1 then the meter jumps to all kinds of numbers and there is no beeping?
Most likely you have bad contact with whatever you are measuring.
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Conecta la sonda negra en el puerto COM en tu multímetro.
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Conecta la sonda roja en el puerto marcado con un símbolo V (en este caso, el puerto derecho).
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Enciende tu multimetro y coloca el dial al modo de voltaje DC (indicado por una V con una linea recta, o el simbolo ⎓).
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La mayoria de multimetros no son auto-oscilantes, eso significa que tendras que establacer el rango correcto para el voltaje que deseas medir.
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Cada ajuste en el dial demuestra el voltaje maximo que puede medir. Por ejemplo, si anticipas medir mas de 2 voltios pero menos de 20, utiliza el ajuste de 20 voltios.
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Si no estas seguro, empieza con el ajuste maximo.
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Coloca la sonda roja en la terminal positiva y la sonda negra en la terminal negativa. El multímetro mostrará el voltaje medido.
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Salta el siguiente paso, el cual muestra como medir voltaje usando multímetro de rango manual.
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Coloca la sonda roja en la terminal positiva y la sonda negra en la terminal negativa.
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Si tu rango lo seleccionaste muy alto, puede que no consigas una lectura muy precisa. Aquí el multímetro lee 9 volts. Esta bien, pero podemos girar el selector a un rango menor para ser más precisos.
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Si seleccionas el rango muy bajo, el multímetro solo lee 1 o 0L, indicando que esta sobrecargado o fuera de rango. Esto no dañará el multímetro, pero necesitamos ajustar el selector a un rango más alto.
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Para empezar, asegúrate que no haya corriente fluyendo en el circuito o componente que quieres medir. Apágalo, desconéctalo de la pared y retira las baterías.
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Conecta la sonda negra en el puerto COM de tu multímetro.
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Conecta la sonda roja en el puerto marcado con un símbolo Ω (en este caso, el puerto derecho).
Be careful when testing ohms on the circuit board, the best test is to remove the part so you are only testing the part not the circuit around the part. Transistors, resistors, caps need to be removed or at best one leg of the part. One time I had a burn open resistor, then I tested the resistor with my Ohms test I got some resistor reading. This was caused by back feed in the circuit.
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Pon una sonda en cada fin del circuito o componente que deseas probar.
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Si tu multímetro no es de rango manual:
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Si tu multímetro lee cerca a cero, el rango está ajustado demasiado alto para obtener una medida buena. Gira el dial a un ajuste mas bajo.
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Si ajustas el rango muy bajo, el multimetro simplemente mostrara 1 u OL, indicando que esta sobrecargado o fuera de rango. Esto no dañara el multimetro, pero si necesitamos ajustar el dial a un rango mas alto.
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132 comentarios
EASy and helpful indeed
Iwant to know hw to test caperstas
Thank you. Very easy and good training
Very helpful for beginners, thanks for these clear instructions!
great article. thanks
thank you !!! for this info!!!
Thanks a lot this is very clear and helpful!
Thanks Jeff. I just purchased a cheap mm. All instructions were in Chinese. Your help made sense of it all, so easy.
Iwant to knw hw to test power suply
Brilliant thank you
It truly does.
so nice Bro...Thanks a lot...
Thanks a lot
Love the resources on the Pro site.
Very good instructions
Nice guide.pl add some additional examples to have better understanding for beginners.Thank you
Nice guide. Pl add some additional practical examples. Thank you.
I'm doing exactly this and mine won't read any voltages, but it will read resistance. I've tested it with multiple batteries that I know work, but I only get a read of 0. What might be the problem?
Thank you, Haven't used one of these is ages; this was a great refresher!
thanks for a very easy tutorial, it is very helpful!
The basics. Soooo important. Well done, short and concise.
Most helpful thank you!
Had multimeter for a couple years, never knew how to make it beep!
Thank you for these great instructions. The instructions that came with the multimeter were not helpful for a beginner, and these really helped us diagnose our problem.
Thank you for the great instructions. My question and the reason for my looking online for info on using a multimeter was to find out what the various resistance readings mean on a digital tester. I am checking out a defrosting element in my refrigerator and got a reading of 12 or 15 ohms. The information I was reading said a 15-100 ohms meant the element was OK, another book said if medium resistance was found it was OK.
By going online I was looking for the answer as to what is low, medium and/or high resistance ranges are.
I did enjoy your instructions, they were easy to understand.
I have used a meter for a long time. Never had instructions so clear and easy to follow. Thank you very much.
The pictures are also very clear and helpful.
Beautifully put. I truly appreciate the lesson. I've learned something of impirtance. Thank you.
it really useful for begginer
Thanks you for the lesson :)
Hi,
das ist wirklich sehr anschaulich aufgebaut und benutzerfreundlich, vielen Dank dafür!
Wer jetzt noch genau wissen möchte wie Multimeter funktionieren und worauf Sie beim Kauf achten sollte der kann gerne noch auf https://multimeter-tester.de schauen und weiter lesen.
Ich wünsche euch noch einen schönen Abend und einen bestmöglichen Start ins neue Jahr.
LG
Thanks you for the lesson :)
Thanks and had help me a lot
Had help me a lot. Many Thanks
Thanks , sometimes need too refresh with the basics.
Very informative! Easy to understand.
Well written.
Simple and easy thanks
I have been searching a tutorial on getting started with trouble shooting an automotive parasitic draw. I have no background in different types of functions of a mmeter such as continuity, voltage, and resistance, your tutorial was a must have. It gave me an understanding of just the basic terminology of the more advanced tutorials. I give it a major thumbs up, excellent tutorial thanks a million !!!!!!
Thank you. This was very helpful to me. Very clear and easy to understand....
Thanks for supportive/useful post
Very Helpful.,thanks
Excellent please give us more of the same, primarily to help with understanding of the subject matter at a basic level.
Excellent and elegantly simple guide.
Thanks you so much for this.For me as a beginner,I didn't find difficulties in reading this but its fruitful one.
thanks a million
It was just awsome.Before your tutorial it just was looked like some alien device to me and now I think it's having very simple working principle. I am now pretty confident to work with it. A very big thanks.
Awesome thanks.. I knew you could use this for a lot of things but not this much.
I have a problem with my multimeter (Mastech MY74), the first thing I did was stupid, haven't read the user manual and tried it on a live socket and now it doesn't want to work. I have changed the fuses (600V, 0,4A and 10A), but it still doesn't work. Does anyone have an idea what else could have went wrong and how to test it?
Best regards
Very useful. I liked the statements like ‘this will not harm the multimeter but will show negative reading ‘. For non science folks like me, these questions crop up often so this guide takes away the anxieties.
Nice article with great illustrations.
Apart from measuring DC voltage, resistance and continuity, they can also measure AC voltage, DC current, transistor and Diode checking, which I learnt from here https://circuitdigest.com/article/how-to...
Following the KISS method of instruction!
Very well done!
marvellous explanation for a layman good luck& thanks
Excellent guide. Very well explained and easy to use.
Dead easy. Very impressed.
Thanks a lot. :) My fear with multimeter is gone now. I am able to measure with confidence.
Jeff, thanks for your step by step multimeter guide. I have also written https://bestmultimeterreviews.org/ similar article in my blog. But, your article is much better than me.
Simple, easy to understand, well presented. Very helpful thanks.
Tanks very much….Its really
Thank you. Very clear and thorough.
Very helpful :) Thank you.
Helpful thanks
Cool keep up the good work and thanks
thanks for a very easy tutorial, it is very helpful! pl add some additional examples to have better understanding for beginners.Thank you
sateesh
Thank u for the precise description,very very useful for beginners.
A MAZUMDER
thanku for guide!!!
I studied multimeter in my 11th grade and since then, haven’t been around these things for a long time! I was glad to go through the above instructions and as my nephew has been studying physics as well, I was able to guide him through some subjects which really gave me a good day and made my nephew happy. Thanks a lot.
Very good explained well. Thank you.
Exceptional directions and explanations for each step. Even an inexperienced user (such as myself) can understand and follow the instructions. So hard to find such detailed instructions for those that “want to be in the know”!! Kudos! You deserve 4+ Stars :)
We thank you for the information
I was always confused about electricity and how to test it but your instructions have given me a better understanding of it. I now have a place to go to for future reference. Thanks.
thanks for the lucid description of the three phases of testing an electronic item; good job!
An excellent guide. Thank you.
Thanks, that's helpful to me
Congrats for showing us the best way use it
Excellent guide Thank you!!!!
Well. .. thank you, this is awesome
thank you very much
Well done. You've explained it in detail and was completely understandable. Tm
Good Content …………..Easy to Learn!
When testing a Tweeter the multimeter reads OL on the resistance scale. What does this mean?
Really helpful
Very simple and easy to understand. Thank you very much for your help, now I can use a multimeter now.
Very informative ; Thank you ?
Thank you so much for making it so simple to follow. Because before I new what I was doing I got the all wires mixed up on my car battery. And I nearly melted my fingers to the wires. So thanks again c foley… craigfol659@gmail.com
Very good explained! Thanks.
easy to understand
Thanks for teaching me
Thanks very helpful
Thanks. Very Helpful
Thank you so much easy and healpful
Thank you! Great how to advice for a beginner!
Thanks for the very detailed guide, good content and quality pictures.
AC is not dangerous, even V's aren't. Everyone must get worried about A's.
Sadly, you didn't include how to measure A (amperage or current), which always causes troubles to measure, to learn and understand.
Hi how can I test a signal transmission through an ffc or fpc cable using a multimeter
That was a really clear and concise tutorial. Thanks.
Just one request. Could you do ones on other capabilities of a DMM, please? For example, measuring ampage, testing doids and LEDs.
Cheers Wal