How to use a multimeter

Introduction: How to Use a Multimeter Basics

How to use a multimeter

How to use a multimeter

How to use a multimeter

A multimeter or a multitester, also known as a VOM (volt-ohm-milliammeter), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter can measure voltage, current, and resistance. Analog multimeters use a microammeter with a moving pointer to display readings.

There are many types of multimeters for many applications but in this tutorial, we will take apart just the most common ones and not that expensive.

Step 1: How to Use a Digital Multimeter

A digital multimeter can be used for voltage, resistance, current, continuity, resistance, capacitance to test transistors,even the internal resistance of capacitor in /out the circuits.

Digital multimeters (DMM, DVOM) have a numeric display, and may
also show a graphical bar representing the measured value. Digital multimeters are now far more common due to their cost and precision, but analog multimeters are still preferable in some cases, for example when monitoring a rapidly varying value.

Step 2: Fluke Multimeter

Fluke Corporation, a subsidiary of Fortive, is a manufacturer of industrial testing equipment including electronic test equipment. It was started in 1948 by John Fluke, who was a friend and roommate of David Packard, future co-founder of Hewlett-Packard, when both were employed at General Electric.

These multimeters are the high end of multimeters well known as a precise multimeter and durable most professional electronic repair engineers use this type of multimeters

Step 3: How to Use a Multi Meter for Voltage

Voltage, electric potential difference, electric pressure or electric tension (formally denoted ∆V or ∆U, but more often simply as V or U, for instance in the context of Ohm’s or Kirchhoff’s circuit laws) is the difference in electric potential between two points.

In the past, for reding just voltage we will use a voltmeter, but more practical this days is to use a multimeter because is got multiple functions and you don’t need a device for each application.

Step 4: Volmeter Ammeter

You have to remember that measuring voltage is very easy and all of the new multimeters have build in the auto function to detect the voltage or if not they have the option to choose from AC/DC.

AC voltage (alternating current) is the voltage and current in our mains plug 120/110/220/240v and the property of this type of voltage/current is fluctuating back-forward 50/60 Hz times/second the main advantage of this type of voltage is the very long distribution range in comparison with DC.

DC voltage is a straight type of voltage/current and is associated with batteries 12v/9v/1.5v

Step 5: Test Battery With Multimeter

The multimeter has this special function where it can detect the voltage and you have the option to choose the range for your appropriate voltage reading and if somehow you will exceed that voltage on the multimeter lcd screen will appear the symbol 1 meaning the voltage is above the range selected

Step 6: Continuity Check

In electronics, a continuity test is the checking of an electric circuit to see if current flows (that it is in fact a complete circuit).
A continuity test is performed by placing a small voltage (wired in series with an LED or noise-producing component such as a piezoelectric speaker) across the chosen path. If electron flow is inhibited by broken conductors, damaged components, or excessive resistance, the circuit is “open”.

Step 7: Multimeter Symbols

You have here a picture of a multimeter symbols

Essentially, a multimeter is an electronic tool that measures current,
voltage, and resistance. (You may also have heard them referred to as “multitesters.”)Current is measured in amps, resistance is measured in ohms, and voltage is measured in volts. There are two main types of multimeters: analog meters and digital meters. Though analog meters use a needle to render measurements, today most people use digital multimeters. Digital multimeters are usually more accurate and offer more consistent readings.

Step 8: Inside a Digital Multimeter

Here you go a quick pick to see inside a digital multimeter its not complicated but not easy as well these device help

electronic hobbyist to perform the most basics forms of testing voltage,current,continuity,resistance and after you master all these procedures than you can buy a professional multitester and spend more but till then you can play with a cheap and reliable one

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Comments

Tip 5 weeks ago on Step 5

Buenas noches,siempre sigo esta página gracias por usos aportes, aprendé mucho uno saludos.

Multimeter

A multimeter is a measuring device that combines various measurement functions such as voltage, current, and resistance.
Multimeters are classified into analog and digital multimeters according to how they operate. Analog multimeters were used a lot in the past, with a moving needle pointing to the scale, but now they are rarely used. Most multimeters currently in use are digital.

Terminals in multimeter

The terminals are where you connect the lead wires for measurement. The lead wire’s red color represents the (+) pole, and the black color represents the (-) pole.

How to use a multimeter

  1. COM : It means a common ground terminal. Connect the black lead wire.
  2. 10A : It is used to measure the current in the range of 0 to 10A. Connect the red lead wire.
  3. V•Ω : Used to measure voltage and resistance. Connect the red lead wire.
  4. VΩmA : You can measure voltage, resistance, and current in milliamps(mA). Connect the red lead wire.

Resistance measurement

The resistance can be measured by turning the rotary switch to the ‘Ω’ zone. The resistance value is measured by touching the lead wire to the resistance.

When measuring resistance, pay attention to the range. For example, if you measure a small value resistance in a large range, the measurement result will be ‘0’. Conversely, infinity (a ‘1’ in the left corner) is displayed when the multimeter’s measuring range is exceeded. Therefore, it is better to choose a range slightly larger than the expected resistance value. For example, if you measure a 10Ω resistance, it is appropriate to put the rotary switch range at 200.

Voltage measurement

Since DC voltage (DCV) and AC voltage (ACV) have different measurement mechanisms, it is necessary to turn the rotary switch well.

How to use a multimeter

  1. ACV : AC voltage measurement
  2. DCV : DC voltage measurement
  3. 20 : Measure DC voltage from 0 to 20V
  4. V- : DC voltage measurement
  5. V

: AC voltage measurement

DC current measurement

How to use a multimeter

Current is a physical quantity different from voltage and refers to the amount of electric charge flowing through the wire per hour. Therefore, to measure the current, you must cut the wire to be measured. Some devices measure without cutting the wire.

There is one thing to be aware of when measuring current. During the current measurement, the resistance inside the multimeter becomes almost ‘0’. This is because the multimeter must not interfere with the flow of current. At this time, be careful because measuring the voltage of the battery or the like may cause overcurrent to flow and damage the multimeter. Some high-end multimeters have a protection circuit.

Transistor hFE measurement

The ‘hFE’ of a transistor is the collector (C) current ratio to the base (B) current. When the base current is ‘1’, it tells how many times the collector current is amplified. hFE is also known as the ‘current amplification factor.’ When the transistor’s three terminals are inserted, a number between about 50 and 200 is output. The output value is slightly different for each transistor.

How to use a multimeter

Continuity test

This is a function to check whether the wires are connected. If the middle of the wire is not cut, a ‘beep

If you’re doing any kind of electrical work, no matter what the application is; one of the best tools you can have at your disposal is a multimeter. If you’re just getting started, here’s how to use one and what all those confusing symbols mean. In this guide, we will show the basics of a multimeter and the uses of a multimeter.

What is a Multimeter?

A multimeter is a measurement tool undeniably necessary in electrical work. It combines three important features: a voltmeter, ohmmeter, and ammeter, and in some cases continuity. A multimeter allows you to know what is going on in your circuits. Whenever your circuit isn’t working, the multimeter will help you troubleshooting.

Different Parts of a Multimeter

If you are a beginner and this is your first time using a multimeter then it’s very important to know the parts of a multimeter. A multimeter has three parts:

  • Display
  • Selection Knob
  • Ports

The display usually has four digits and it has the ability to display a negative sign. Some multimeters have illuminated displays for better viewing in low light situations. The selection knob allows the user to set the multimeter to read different things such as milliamps (mA) of current, voltage (V) and resistance (Ω).

How to use a multimeter

The COM port stands for Common, and the black probe will always plug into this port. The VΩmA port sometimes denoted as mAVΩ is simply an acronym for voltage, resistance, and current (in milliamps). This is where the red probe will plug into if you’re measuring voltage, resistance, continuity, and currently less than 200mA. The 10ADC port sometimes denoted as just 10A. It is used whenever you’re measuring the current that’s more than 200mA.

Multimeter Symbols and Meaning

There’s a lot symbol available at the selection knob on a multimeter. But if you’re only going to do some basic stuff then you won’t even need to use half of all the settings. In any case, here’s a rundown of what each symbol means on my multimeter:

  • Direct Current Voltage (DCV): Sometimes it will be denoted with a V– instead. This setting is used to measure direct current (DC) voltage in things like batteries.
  • Alternating Current Voltage (ACV): Sometimes it will be denoted with a V

instead. This setting is used to measure the voltage from alternating current sources, which is pretty much anything that plugs into an outlet, as well as the power coming from the outlet itself.

  • Resistance (Ω): This measure how much resistance there is in the circuit. The lower the number, the easier it is for the current to flow through, and vice versa.
  • Continuity: Usually denoted by a wave or diode symbol. This simply tests whether or not a circuit is completed by sending a very small amount of current through the circuit and seeing if it makes it out the other end. If not, then there’s something along the circuit that’s causing a problem—find it!
  • Direct Current Amperage (DCA): Similar to DCV, but instead of giving you a voltage reading, it will tell you the amperage.
  • Direct Current Gain (hFE): This setting is to test transistors and their DC gain, but it’s mostly useless since most electricians and hobbyists will use the continuity check instead.
  • How to Use a Multimeter?

    A multimeter is used for different purpose like measuring voltage (volts), current (amps) and resistance (ohms). Now we will show you how you can measure current, voltage, resistance using a multimeter.

    Measuring Voltage

    You can measure DC voltage or AC voltage. The V with a straight line means DC voltage. The V with the wavy line means AC voltage. To measure voltage:

    • Set the mode to V with a wavy line if you’re measuring AC voltage or to the V with a straight line if you’re measuring DC voltage.
    • Make sure the red probe is connected to the port with a V next to it.
    • Connect the red probe to the positive side of your component, which is where the current is coming from.
    • Connect the COM probe to the other side of your component.
    • Read the value on the display.

    Measuring Current

    To measure current you need to bear in mind that components in series share a current. So, you need to connect your multimeter in series with your circuit. Before measuring the current, be sure that you’ve plugged in the red probe in the right port, in this case, µAmA. In the example below, the same circuit of the previous example is used. The multimeter is part of the circuit.

    Measuring Resistance

    Plug the red probe into the right port and turn the selection knob to the resistance section. Then, connect the probes to the resistor leads. The way you connect the leads doesn’t matter, the result is the same.

    Checking Continuity

    Continuity testing is the act of testing the resistance between two points. If there is very low resistance (less than a few Ωs), the two points are connected electrically, and a tone is emitted. If there is more than a few Ωs of resistance than the circuit is open, and no tone is emitted. This test helps ensure that connections are made correctly between two points. This test also helps us detect if two points are connected that should not be.

    Bottom Line

    A multimeter is an important tool in any electronics lab. In this Beginner’s Guide, we’ve shown you the basics of multimeter and uses. This guide is meant to be a starting point to get you up and running, and it’s very possible that some things shown above are different from your particular model.

    Multimeter

    A multimeter is a measuring device that combines various measurement functions such as voltage, current, and resistance.
    Multimeters are classified into analog and digital multimeters according to how they operate. Analog multimeters were used a lot in the past, with a moving needle pointing to the scale, but now they are rarely used. Most multimeters currently in use are digital.

    Terminals in multimeter

    The terminals are where you connect the lead wires for measurement. The lead wire’s red color represents the (+) pole, and the black color represents the (-) pole.

    How to use a multimeter

    1. COM : It means a common ground terminal. Connect the black lead wire.
    2. 10A : It is used to measure the current in the range of 0 to 10A. Connect the red lead wire.
    3. V•Ω : Used to measure voltage and resistance. Connect the red lead wire.
    4. VΩmA : You can measure voltage, resistance, and current in milliamps(mA). Connect the red lead wire.

    Resistance measurement

    The resistance can be measured by turning the rotary switch to the ‘Ω’ zone. The resistance value is measured by touching the lead wire to the resistance.

    When measuring resistance, pay attention to the range. For example, if you measure a small value resistance in a large range, the measurement result will be ‘0’. Conversely, infinity (a ‘1’ in the left corner) is displayed when the multimeter’s measuring range is exceeded. Therefore, it is better to choose a range slightly larger than the expected resistance value. For example, if you measure a 10Ω resistance, it is appropriate to put the rotary switch range at 200.

    Voltage measurement

    Since DC voltage (DCV) and AC voltage (ACV) have different measurement mechanisms, it is necessary to turn the rotary switch well.

    How to use a multimeter

    1. ACV : AC voltage measurement
    2. DCV : DC voltage measurement
    3. 20 : Measure DC voltage from 0 to 20V
    4. V- : DC voltage measurement
    5. V

    : AC voltage measurement

    DC current measurement

    How to use a multimeter

    Current is a physical quantity different from voltage and refers to the amount of electric charge flowing through the wire per hour. Therefore, to measure the current, you must cut the wire to be measured. Some devices measure without cutting the wire.

    There is one thing to be aware of when measuring current. During the current measurement, the resistance inside the multimeter becomes almost ‘0’. This is because the multimeter must not interfere with the flow of current. At this time, be careful because measuring the voltage of the battery or the like may cause overcurrent to flow and damage the multimeter. Some high-end multimeters have a protection circuit.

    Transistor hFE measurement

    The ‘hFE’ of a transistor is the collector (C) current ratio to the base (B) current. When the base current is ‘1’, it tells how many times the collector current is amplified. hFE is also known as the ‘current amplification factor.’ When the transistor’s three terminals are inserted, a number between about 50 and 200 is output. The output value is slightly different for each transistor.

    How to use a multimeter

    Continuity test

    This is a function to check whether the wires are connected. If the middle of the wire is not cut, a ‘beep