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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 December 2, 2018

        How to Flow Your Way to a More Productive Life

        How to Flow Your Way to a More Productive Life

        Ebb and flow. Contraction and expansion. Highs and lows. It’s all about the cycles of life.

        The entire course of our life follows this up and down pattern of more and then less. Our days flow this way, each following a pattern of more energy, then less energy, more creativity and periods of greater focus bookended by moments of low energy when we cringe at the thought of one more meeting, one more call, one more sentence.

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        The key is in understanding how to use the cycles of ebb and flow to our advantage. The ability to harness these fluctuations, understand how they affect our productivity and mood and then apply that knowledge as a tool to improve our lives is a valuable strategy that few individuals or corporations have mastered.

        Here are a few simple steps to start using this strategy today:

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        Review Your Past Flow

        Take just a few minutes to look back at how your days and weeks have been unfolding. What time of the day are you the most focused? Do you prefer to be more social at certain times of the day? Do you have difficulty concentrating after lunch or are you energized? Are there days when you can’t seem to sit still at your desk and others when you could work on the same project for hours?

        Do you see a pattern starting to emerge? Eventually you will discover a sort of map or schedule that charts your individual productivity levels during a given day or week.  That’s the first step. You’ll use this information to plan your days going forward.

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        Schedule According to Your Flow Pattern

        Look at the types of things you do each day…each week. What can you move around so that it’s a better fit for you? Can you suggest to your team that you schedule meetings for late morning if you can’t stand to be social first thing? Can you schedule detailed project work or highly creative tasks, like writing or designing when you are best able to focus? How about making sales calls or client meetings on days when you are the most social and leaving billing or reports until another time when you are able to close your door and do repetitive tasks.

        Keep in mind that everyone is different and some things are out of our control. Do what you can. You might be surprised at just how flexible clients and managers can be when they understand that improving your productivity will result in better outcomes for them.

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        Account for Big Picture Fluctuations

        Look at the bigger picture. Consider what happens during different months or times during the year. Think about what is going on in the other parts of your life. When is the best time for you to take on a new project, role or responsibility? Take into account other commitments that zap your energy. Do you have a sick parent, a spouse who travels all the time or young children who demand all of your available time and energy?

        We all know people who ignore all of this advice and yet seem to prosper and achieve wonderful success anyway, but they are usually the exception, not the rule. For most of us, this habitual tendency to force our bodies and our brains into patterns of working that undermine our productivity result in achieving less than desired results and adding more stress to our already overburdened lives.

        Why not follow the ebb and flow of your life instead of fighting against it?

          Featured photo credit: Nathan Dumlao via unsplash.com

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