Multimeter: what it is, why you need it and how to choose it

When repairing electrical equipment, as a rule, a variety of measuring devices are used, with the help of which you can see the necessary parameters. Multimeter is a device with which you can measure voltage, current and resistance.

What multimeters are

According to the principle of operation, multimeters are divided into the following types:

• analog;
• digital.

Instruments differ in appearance: analog dials have an arrow, and the digital ones have an LCD screen. Digital multimeters are simple and functional, they are more accurate. They are preferred by amateurs and professionals.

The simplest models measure basic parameters: current, voltage, resistance. In addition, there are devices that can measure capacitance, frequency, temperature, test transistors and diodes, determine the integrity of wires and cables. There are also stationary and portable multimeters.

Multimeter application

The device is functional and has a large area of application in the home:

• The multimeter measures the charge of the battery. It will help to determine whether the device is working or the battery is dead.
• The multimeter is used to determine the voltage of an outlet. It is needed in situations where appliances are unstable or light bulbs are flashing.
• This device is used to check the network. If an appliance is not working, one of the causes may be an open circuit in the power cord or inside the appliance. By checking the continuity of the circuit in the cord, you can find the breakage, and replace the cord. This is one of the most frequently used functions of the instrument.
• The multimeter measures the power consumption of the instrument.
• This instrument measures the surface temperature of air or liquids.

You can also use the multimeter when repairing or servicing vehicles. With its help you can check the efficiency of the generator, starter, battery, you can test the plugs, ignition coils.

How to choose a multimeter

When choosing a multimeter, the following technical parameters should be taken into account:

• The range of measured values. This implies the minimum and maximum value of the measured data.
• The digit capacity or resolution. This indicates how many full discharges and limited range charges the instrument will measure.
• Uncertainty. In inexpensive devices it is no more than 10%. For a perfectly accurate measurement, technical experts recommend buying models in the higher price segment.

Choose devices he reliable manufacturers. On them the manufacturer gives a guarantee