As in the socket check the voltage with a multimeter

Electricity in the house is a familiar phenomenon. It is used by everyone. Everyone knows that there is a voltage of 220 V in the network and all household appliances are designed for this voltage. But rarely anyone looks at the manual, where the manufacturer indicates the permissible voltage deviation from the rated voltage at which a particular device can operate without harming its electrical circuit. And to watch all the same it is worth, especially to be sure whether 220 V is stable in the network.

In fact, the voltage is constantly changing, unless, of course, there are special stabilizers in the house that smooth out all the jumps, carefully guarding the equipment. In an ordinary outlet, you can observe both 180 and 270 V. Not every technique can withstand such a rigid attitude towards itself.

What can we do to protect ourselves from the risk of losing electronics? First, it is necessary to put on the input of the distribution switchboard the over -cut-off block, which are available. Secondly, purchase an electronic multimeter. How in the socket check the voltage with a multimeter? About this - below.

Measuring device: types

Electrical devices are devices that serve to measure electrical quantities. These quantities include current, voltage and resistance. For each type of measurement, a certain type of instrument is used, but there is also a universal technique that allows measuring various parameters of electricity.

By type of performance, there are analog circuits and digital devices. Analog indicators use the mechanism with an arrow and a graduated scale as an indicator of the value of the measured parameter. In digital, there is an electronic display on which the result of measurements is displayed.

All devices have the following main characteristics:

• Sensitivity.
• Measurement error.

In semi-professional, these parameters are sufficient to measure the voltage with a multimeter in the socket.

What parameters can be measured with a multimeter

Multimeters refer to devices of universal application. They can make measurements of DC and AC current and voltage, ring the circuits, check semiconductor devices, determine the capacitance of the capacitor. The measurement limits of the instrument are switched in several ranges. With this technique, the question no longer arises: how to check the voltage in the socket? The multimeter is very easy to use.

There are analog and electronic devices. Analogues for each type of measurement have their own scale with graduation. On the limits are indicated multipliers, to which it is necessary to multiply the numbers obtained by measurement, in order to have an idea of the real value of the measured parameter. Electronic are simpler, as they do not require additional actions - the scoreboard immediately displays the result. It is very easy to check the voltage with a multimeter in the socket.

Functional elements of the multimeter

The majority of produced multimeters, which can be found on the market, are intended for a wide range of consumers. They have a standard design with the arrangement of controls.

The front panel is equipped with a wide LCD (liquid crystal) display, a round switch for the options of the measured parameters and their limits, three connectors for connecting the probe to the device, and a connector for measuring transistor parameters. The electrical circuit of the device is powered by a 9K "Krone" battery.

The position marking of the switch indicates the following:

• OFF - the device is inactive;
• DCV - a mode of measurement of a constant pressure;
• DCA - mode of measurement of direct current;
• ACV - AC measuring mode;
• HFE - check of transistors;
• ●))) - the ringing of an electrical circuit or diodes;
• Ω - measurement of the resistance value.

As in the socket check the voltage with a multimeter

To make any measurements, you first need to connect the probe to the instrument. They are usually two colors - one red, the other black. Black, as a rule, is a zero, common or negative probe, so it is connected to the lowest connector with the designation COM. The second one, red, is connected to the average for almost all measurements. The upper connector is intended for a red test lead when measuring an AC current of up to 10 A.

Then select the operating mode by turning the round switch to the desired position. If you know what the measured value should be, then the measurement limit is set slightly higher. This is done in order not to burn the unit. But there may be a situation where there are no assumptions that the device can show. Then the measurement limit is set as high as possible.

After that, turn the device on. If the voltage is measured, then in parallel, if the current is in series. Measurement of the resistance or semiconductor parameters is carried out in the absence of power in the measured circuit. Further readings are taken.

How to check the voltage in the network with a multimeter? Switch the switch to the ACV position to a limit of 750 V and measure. How to check the voltage in a 380V network with a multimeter? Similar. It must be remembered that such electricity is dangerous for life, and be careful.

How to check the network when there is no device

If the multimeter is missing, but you need to check urgently, if there is a voltage in the socket, you can use a simple circuit. Take an ordinary incandescent lamp 220 V and a plinth of a metal or copper rod with a diameter of no more than 4 mm is tightly attached to the plinth (to the threaded part). The rod at the end is sharpened, and a stranded wire in the insulation is soldered to the other contact of the lamp. The result was a probe. Of course, you can not determine the magnitude of the voltage, but you can establish the availability of electricity. Even you can check for a phase if there is a good ground, because it is known that the current can flow between phase and earth, without requiring a zero wire network. But this option is suitable for more experienced electricians.

Conclusion

If still there are difficulties, as in the socket check the voltage with a multimeter, then in the instructions to the device is given a detailed description. I am glad that such devices have an acceptable price.