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Necessary Things for Using Multimeter

Necessary Things for Using Multimeter

The multimeter is a familiar device to everyone who specializes in the electricity sector. The device provides effective support for electricians and electrical engineers who need to test circuits, measure parameters, and so on.

The multimeter is an electrical measuring instrument with multiple functions. The basic functions include the ammeter, voltmeter, and ohmmeter. Furthermore, this device also can measure the power line frequency, capacitance capacitors, check transistors. Due to the usefulness of the device, many people need to purchase one. However, some people still have trouble finding the best multimeter to buy and understanding how to use it most effectively. This post will help you learn how to select and use a multimeter.

    Photo Credit: Juan Rodriguez

    In fact, the multimeter is quite easy to use. Selection of the unit of measurement and scale can be performed by manipulating the buttons and switches on the device. Moreover, many modern multimeters can automatically select the scale.

    1. Functions of multimeters

    – Checking circuit connections: the machine will beep when the resistance between two probes is nearly equal to 0.

    – Measuring small voltages or amperages when a large resistor is present.

    – Measuring the inductance of the inductor and capacitance of the capacitor when checking and installing electrical circuits.

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    – Checking diodes and transistors.

    – Providing support for temperature measurement using thermocouples.

    – Measuring the average frequency when adjusting a radio circuit. The user would listen to the signal instead of seeing the signal as when using an oscillograph.

    – Saving measurement data in the device.

    2. Advantages and disadvantages of multimeter types: Analog multimeters

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      Advantages

      – Usually preferred for testing whether semiconductor components such as a diode, transistor, or MOSFET are still active or not, because this type of device is easier to use for this task.

      – Can be used to quickly check damaged components in electronic circuits.

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      – Lower price.

      Disadvantages

      – The needles or electronic circuits inside can easily break if the device is not used properly.

      – It can be difficult to read the numeric values for the voltage, current, and resistance.

      – The accuracy is not high.

      3. Advantages and disadvantages of multimeter types: Digital multimeters

        Photo Credit: en-us.fluke.com

        Advantages

        – Easy to read and follow the numerical values displayed on the screen.

        – High precision.

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        – High durability.

        – Can be equipped with more advanced functions, such as measuring frequency or capacitance.

        Disadvantages

        – Expensive.

        – Difficult to use, which could be a problem if the user wants to quickly check whether electronic components are damaged.

        4. How to use a multimeter to measure current and voltage

        Method 1: Use the scale line

        In order to measure the current using a multimeter, you measure the load consumption, but you have to note that you can only measure an electric current lower the value that the scale allows. Next, you follow the steps below:

        Step 1: Set the device on the highest scale line.

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        Step 2: Connect the rods of the device to the load, with the red rod on the positive side and the black rod on the negative side.

        The device will then provide the current values.

        Method 2: Use DC scale voltage

        It is also possible to measure the current through the load by measuring the pressure drop across the resistor in series with the load limit line; the measured voltage divided by the limit value will indicate the current value. This method gives the user the ability to measure larger currents and is also safer.

        To do this, read AC and DC voltage values. When measuring the DC voltage, you must read the value on the DCV.A index bar. If you set 250V for the scale, the highest value measurable is 250. When you are measuring the AC voltage, you must read the values on the AC.10V bar.

        Featured photo credit: mjlorton via youtube.com

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        Angella Copper

        Professor of Hanoi University of Science and Technology

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        Last Updated on June 19, 2019

        How to Practice Positive Meditation in 2 Simple Steps

        How to Practice Positive Meditation in 2 Simple Steps

        Just by simply spending some effort and time, staying positive every day can be easily achieved. All that is required is a fraction of your time, 10-15 minutes a day to cultivate the positive you!

        But first, what is really positive thinking? Do you have to be in an upbeat, cheerful and enthusiastic mood all day to be positive minded?

        No. Positive thinking simply means the absence of negative thoughts and emotions – in other words, inner peace!

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        When you are truly at peace within yourself, you are naturally thinking positively. You don’t have to fight off negative thoughts, or search desperately for more positive thoughts. It just happens on its own. And here are 2 positive thinking meditation tips to empower you:

        1. Relax as You Meditate

        A powerful, simple yet rarely used technique is meditation. Meditation doesn’t have to take the form of static body posture. It can be as simple as sitting in a comfortable chair listening to soothing music. Or performing relaxation techniques such as deep breathing exercises.

        Meditation is all about letting go of stressful or worrisome thoughts. That’s it! If you spend just a few minutes per day feeling relaxed and peaceful, you automatically shift your mind into a more positive place. When you FEEL more relaxed, you naturally THINK more positively!

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        Start with a short period of time, like 5 or 10 minutes a day. You can meditate first thing in the morning, during your lunch break, right before you go to bed at night, or any time. The most important thing is to consciously let go of unproductive thoughts and feelings. Just let them go for those few minutes, and you may decide not to pick them back up again at all!

        2. Practice Daily Affirmations

        Positive affirmations can be used throughout the day anywhere and at anytime you need them, the more you use them the easier positive thoughts will take over negative ones and you will see benefits happening in your life.

        What are affirmations? Affirmations are statements that are used in a positive present tense language. For example, “Every day, in every way, I’m getting better, better and better” is a popular affirmation used by the late Norman Vincent Peale.

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        So how does one go about using positive affirmations in everyday life? Let’s look at some guidelines to follow when reciting your daily affirmations.

        1. Use first person pronouns in your message (I)
        2. Use present tense (I have)
        3. Use positive messages (I am happy)
        4. Repeat your affirmations on a consistent basis

        Affirmations have to be said with conviction and consistency. Start your day by saying your affirmations out loud. It wouldn’t take more than 5 minutes to repeat your affirmations; yet when done consistently, these positive affirmations will seep into the subconscious mind to cultivate the new positive you.

        Here’s an example of a “success affirmation” you can use on a daily basis:

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        I am successful in everything I do. Every venture I get into returns wealth to me. I am constantly productive. I always perform to the full potential I have and have respect for my abilities.
        My work is always given positive recognition. I augment my income constantly. I always have adequate money for everything I require. I spend my money prudently always. My work is always rewarded.

        You can find more examples here: 10 Positive Affirmations for Success that will Change your Life

        Remember, affirmations work on the basis of conviction and consistency. Do yourself a favor and make a commitment to see this through.

        Begin practicing these positive thinking tips right now. And I wish you continued empowerment and growth on your positive thinking journey.

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