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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

      Photo Credit: stratomory

      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 September 25, 2019

        How to Tap Into the Power of Positivity

        How to Tap Into the Power of Positivity

        As it appears, the human mind is not capable of not thinking, at least on the subconscious level. Our mind is always occupied by thoughts, whether we want to or not, and they influence our every action.

        When we were still children, our thoughts seemed to be purely positive. Have you ever been around a 4-year old who doesn’t like a painting he or she drew? I haven’t. Instead, I see glee, exciting and pride in children’s eyes. But as the years go by, we clutter our mind with doubts, fears and self-deprecating thoughts.

        Just imagine then, how much we limit ourselves in every aspect of our lives if we give negative thoughts too much power!

        We’ll never go after that job we’ve always wanted because our nay-saying thoughts make us doubt our abilities.

        We’ll never ask that person we like out on a date because we always think we’re not good enough.

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        We’ll never risk quitting our job in order to pursue the life and the work of our dreams because we can’t get over our mental barrier that insists we’re too weak, too unimportant and too dumb.

        We’ll never lose those pounds that risk our health because we believe we’re not capable of pushing our limits.

        And we’ll never be able to fully see our inner potential because we simply don’t dare to question the voices in our head…

        But enough is enough! It’s time to stop these limiting beliefs and come to a place of sanity, love and excitement about life, work and ourselves.

        So, how can we tap into the power of positivity?

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        “Happiness cannot come from without, it comes from within.” – Helen Keller

        It’s not as hard as it may seem; you just have to practice, practice, practice. Here are 4 simple yet powerful ideas on how you can get started.

        1. Learn to substitute every negative thought with a positive one.

        Every time a negative thought crawls into your mind, replace it with a positive thought. It’s just like someone writes a phrase you don’t like on a blackboard and then you get up, erase it and write something much more to your liking.

        Just take a look at these 10 Positive Affirmations for Success that will Change your Life.

        2. See the positive side of every situation, even when you are surrounded by pure negativity.

        This one is a bit harder to put into practice, which does not mean it’s impossible.

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        You can find positivity in everything by mentally holding on to something positive, whether this be family, friends, your faith, nature, someone’s sparkling eyes or whatever other glimmer of beauty.

        If you seek it, you will find it.

        3. At least once a day, take a moment and think of 5 things you are grateful for.

        This will lighten your mood and give you some perspective of what really is important in life and how many blessings surround you already.

        Here’re 60 Things To Be Thankful For In Life that can inspire you.

        4. Change the mental images you allow to enter your mind.

        How you see yourself and your surroundings make a huge difference to your thinking.

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        Instead of dwelling on dark, negative thoughts, consciously build and focus on positive, light and colorful images, thoughts and situations in your mind a few times a day.

        Learn from this article how to change your mental images: How to Think Positive and Eliminate Negative Thoughts

        If you are persistent and keep on working on yourself, your mind will automatically reject its negative thoughts and welcome the positive ones.

        And remember:

        You are (or will become) what you think you are.

        This is reasonable enough to be proactive about whatever is going on in your head.

        More About Staying Positive

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