7 function digital multimeter

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This is the 7 function digital multimeter, your go-to tool for measuring voltage, current, resistance, and more. With its easy-to-read LCD display and simple operation, this multimeter is perfect for beginner and experienced users alike.


This is a general purpose multimeter that can measure AC and DC voltage, AC and DC current, resistance, and also has a diode test function. It is battery operated and has a large easy-to-read digital display.

What is a digital multimeter?

A digital multimeter is a device used to measure electrical parameters such as voltage, current, and resistance. It can also be used to measure continuity and test diodes. Most digital multimeters have a display that shows numerical values, and some also have a analog pointer that can be used to visualize the readings.

How does a digital multimeter work?

Digital multimeters (DMM) measure AC/DC voltage, resistance, and capacitance. They also have a diode-testing function and can often measure frequency and duty cycle. Most DMMs use a Liquid Crystal Display (LCD) to show readings, but a few still use Light Emitting Diodes (LEDs).

To understand how a DMM works, you first need to know how an analog multimeter (AMM) works. A basic AMM has four parts: the moving coil, the stationary plate or “slider contact,” the y-axis resistor, and the x-axis capacitor. The moving coil is attached to the slider contact; as the slider contact moves across the x-axis resistor, the current passing through the coil generates a magnetic field. This magnetic field deflects the moving coil, which is attached to the pointer on the display. The amount of deflection is proportional to the magnitude of the measured quantity.

A digital multimeter uses a different approach. Instead of using an analog display, it uses electronic circuits to convert the measured quantity into digital form and then displays this information on an LCD. These electronic circuits are made up of two main parts: an analog-to-digital converter (ADC) and a microprocessor.

The ADC is responsible for converting the analog signal from the sensor into a digital signal that can be processed by the microprocessor. The microprocessor then uses this information to calculate various values such as voltage, current, or resistance, which are displayed on the LCD.

The 7 functions of a digital multimeter

A digital multimeter is a measuring instrument that has seven basic functions: full-scale deflection, zero adjustment, low battery indication, polarity reversal protection, overload protection, and automatic power-off.

Full-scale deflection is the maximum amount of current that can be measured by the multimeter. Zero adjustment is a feature that allows the user to fine-tune the multimeter’s readings to ensure accuracy. Low battery indication alerts the user when the batteries need to be replaced.

Polarity reversal protection prevents damage to the multimeter from reversed polarity batteries. Overload protection prevents damage to the multimeter from too much current flow. Automatic power-off turns the multimeter off when it is not in use, conserving battery power.

Why use a digital multimeter?

Digital multimeters offer a number of advantages over their analog counterparts. First and foremost, digital multimeters are much more accurate. They also tend to be more rugged and durable, making them ideal for use in industrial and commercial settings. Additionally, digital multimeters typically have more features than analog multimeters, such as the ability to store data or create graphs.

How to use a digital multimeter?

A digital multimeter is a versatile tool that can be used to measure a variety of electrical properties, including voltage, current, and resistance. horde voltages present in your home’s wiring, or test the current draw of an appliance. You can also use a digital multimeter to test the continuity of a circuit or individual component.

To use a digital multimeter, you will first need to select the proper function switch for the property you wish to measure. For example, if you want to measure voltage, you would select the “V” (voltage) position on the function switch. Once you have selected the proper function, you will need to connect the black lead of your digital multimeter to the common ground terminal, and the red lead to the terminal labeled with the quantity you wish to measure.

For example, if you are measuring voltage across two points in a circuit using the “V” (voltage) position on the function switch, you would connect one lead of your digital multimeter to each point in the circuit. After making your connections, simply read the display on your digital multimeter to obtain your measurement.

Tips for using a digital multimeter

A digital multimeter is a versatile tool that can be used for a variety of tasks around the home, workshop, and even on the road. Here are a few tips to help you get the most out of your digital multimeter:

1. Check the batteries before using the digital multimeter. If they are low, replace them with fresh batteries.
2. Choose the right setting for the task at hand. For example, if you want to measure electrical current, select the “amps” setting.
3. Read the manual thoroughly before using the digital multimeter. This will help you understand how to use all of its features properly.
4. Be sure to disconnect any power source before taking measurements. This will prevent damage to both your digital multimeter and yourself.
5. When taking measurements, always hold the digital multimeter by its body, not by its leads (the wires that come out of it).
6. If you’re ever in doubt about how to use your digital multimeter or what readings mean, consult an expert before proceeding.


The 7 function digital multimeter is a great tool for taking measurements in a variety of settings. It is easy to use and provides accurate readings. We hope this guide has been helpful in understanding the features and benefits of this multimeter.


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