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electrical testing gadgets

electrical testing devices

أجهزة فحص الكهرباء electrical testing devices

electrical testing devices, Electrical testing devices are considered one of the most important equipment that must be provided while carrying out electrical work by people and companies in the field of electricity.

In order to reduce the working time, To facilitate the electrical work on the ground

There are many who ask about electrical testing devices to meet their needs when carrying out electrical installation works.

In this article, we will show you the most important electrical testing devices that must be available when performing any electrical work.

DMM . Multipurpose Device

electrical testing devices

It is one of the electrical testing devices used in electrical installations.


  • This device is used to measure various electrical values such as voltage, current, resistance, frequency, and capacitance.
  • It has an automatic shutdown feature.

How to check voltage for beginners

How to check voltage for beginners

How to check voltage for beginners Usually you need a dedicated tool to check the voltage of an appliance or the voltage of an electrical socket.

Also, what steps must be followed in order to check the value of the voltage applied to the resistor, capacitor or coil.

Here in this article we will learn how to check the voltage check for beginners, and how to deal with it, As well as identifying the method of measuring constant voltage and alternating voltage, Is there a difference between them or not.

What is a voltage tester for beginners?

First you should know that there is a device called a voltmeter (in English: voltmeter), It is designed to measure volts alternating and continuous current,

And another device called a multimeter. multimeter), It is a multifunctional device that can check current (amperes), voltage (volts) and resistance (ohms).

Therefore, both can be used to check the voltage of any circuit, whether it is in the field of electronics or electricity.


How to measure voltage (volts)

In general, before starting to learn how to measure voltage, two things must be checked:

  • Place the measuring probes of the voltage tester in the designated ports, By placing the black probe into the COM port, The red probe is placed in the V port. This will not change unless you want to measure the current (amperes).
  • Find the voltage symbol and choose the appropriate range for us, i.e. if you want to measure the voltage of a 12 volt battery, Then you have to set the scale indicator to a volt value higher than the battery volt value which is 20V.

important note: When measuring AC voltage, do not forget to set the scale indicator to AC voltage measurement. As well as placing the indicator within the range of constant voltage (voltage) when measuring constant voltage (DC).

In all cases, you should always choose the degree of the voltage measurement value so that it is higher than the value of the voltage to be measured.


Constant voltage (DC) check steps

After we know how to adjust the voltage tester by placing the measuring probes and calibrating the scale switch, Now let’s move on to how to check the constant voltage (DC) of a 9-volt battery in simplified steps:

  • Place the tip of the red probe on the positive (+) terminal of the battery. The black probe is on the negative (-) terminal of the battery.
  • You will see a reading on the DC voltage tester display.
  • If you reverse the meter probes, you will get the same reading but negative, So always use the probes correctly to get an accurate reading and to avoid errors.

The same steps above you can measure the DC voltage of any circuit, And do not forget that the voltage is measured in parallel.

Constant voltage measurement method

AC Voltage Check Steps

  • Set the step switch on the AC potentiometer to measure the voltage, Here we want to measure the voltage of the power grid, If the network voltage is 220 volts, You have to put the indicator on 600 volts as shown in the picture, If the tester is an automatic type, put the pointer on the AC voltage symbol only.
  • Place the red probe at either end of the power socket output (Phase or Neutral), while the black end is at the other end of the socket, And there is no polarity here because we are dealing with alternating current.

Clamp Meter

It is one of the most widely used electrical testing devices because it is intended to measure the value of the current without disconnecting the wire.


  • It is used to measure the values of electric currents, especially large currents.
  • There are some devices that measure both AC and DC current.
  • It is used in all electrical works.
  • It is also used to measure AC and DC voltage.

electric current measuring devices

Ingco device for checking alternating current and voltage


  • It checks the power line from the outside without having to touch the copper wires.
  • It has an audible alert with lighting when there is a current in the wire.
  • It has a flash light to illuminate it in dark places.
  • AC voltage measurement range from 12V to 1000V.
  • There is an indicator for the device’s battery status.
  • It has an automatic on and off system when the hood is put on and removed.

How to check the fan capacitor

How to check the fan capacitor

How to check the fan capacitor,

In this topic, we will give you a simplified explanation of how to check the fan capacitor step by step to facilitate the testing process for every novice and hobbyist in the repair of electric fans,

Follow us from the beginning to understand the mechanism and steps of checking the fan capacitor.


Initial information about the fan condenser

The fan capacitor has two terminals that are connected in parallel with the terminals of the driver coil and the rectifier coil by ignoring the polarity because the fan capacitor is nonpolar, that is, it has no positive or negative polarity.

It is also available in condenser fan in the market in different capacities.

Important note: When you want to replace the damaged fan capacitor with a new capacitor, it is preferable to have the same capacity as the old capacitor,

The capacitance of the capacitor is written on the side surface in microfarads.

You may also be interested in: The difference between a rectifying capacitor and an operating capacitor

Read the most important fan capacitor data

There are several written values that we note when buying a fan capacitor as follows:

Fan Capacitor Capacity: It is an important value when buying a fan capacitor as a replacement for the old one.

Therefore, the value of the capacitance of the new capacitor must be the same as the capacitance of the old capacitor,

Any increase in the capacitor’s capacitance can cause an increase in current. The decrease causes the fan rotation speed to slow down.

The capacitance of the fan capacitor is measured in microfarads.

mistake percentage:

The fan capacitor has an error rate of plus or minus 5%.

Capacitor Voltage: The capacitor voltage should be suitable to withstand the fan voltage when working.

Fan Capacitor Important Data

How to check the fan capacitor by charging and discharging

First we will get to know the initial examination of the fan capacitor, By initial testing, we mean charging the capacitor for one second and discharging it by connecting its ends to a metal or copper wire. The initial examination is carried out as follows:

  • Charge the fan capacitor for only 1 second, By connecting the two ends of the capacitor in parallel with the household electricity source (phase and loom).
  • Discharge the capacitor by connecting the two ends of the capacitor together, taking great care to avoid sparking from the capacitor. If a spark occurs, this means that the capacitor is initially intact, not permanently.

The trick of checking the capacitor by charging and discharging

This method was adopted in the past before we dealt with examination devices such as the multimeter, This examination is preliminary.

How to check the fan capacitor using a multimeter

After completing the initial check, we go to the most accurate and preferred check. Now we go to the method of checking the fan capacitor using a multimeter as well, by following the following steps:

  • Place the two ends of the measuring probe (red and black) in the ports designated for them.
  • Put the cursor switch on the microfarad unit, And if the device is a system of progressive values of the capacitor, we put the pointer on the value of 20 microfarads.
  • Turn on the device if it has a power button.
  • Place the two probes of the device (red and black) parallel to the two ends of the capacitor.
  • If the reading appears the same as the value written on the capacitor or with a very small difference, this indicates that it is correct.
  • If the reading appears at a value lower than or higher than the value of the capacitor by a large margin, This indicates that it is damaged and must be replaced with a new capacitor, the same value as the old capacitor.

electrical testing devices

electrical socket tester


  • It checks electrical sockets to ensure that they are properly connected.
  • It is connected with the power socket directly like the socket of the electrical appliances.
  • It contains three LEDs whose illumination changes according to the mode of delivery of the lamp.
  • easy to use, And you don’t need much experience.

electrical socket tester

Insulation Tester

This device is used to measure the resistance of wire insulation to ensure that there is no leakage of electric current through those insulators.

insulation measuring device

electrical testing devices

Earth Loop Tester

The device is used to measure ground resistance in companies, factories, institutions, as well as homes.

This is to ensure that the ground resistance is within the permissible limits according to the nature of the work or the place.

earth measuring device

electrical testing devices

Earth Resistance Tester

It is used to measure the resistance of the soil in places where it is intended to ensure that the ground resistance can be relied upon to lay the grounding rods.

soil resistance device

Power Harmonic Analyzer

It is used to measure various electrical energy such as apparent energy, effective and passive energy, As well as to measure the power factor,

It is also used to measure and analyze the main waves in the feed source and know the strength of each unwanted wave.

electrical testing devices

Phase Rotation Indicator

This device is used to distinguish between the three lines of vases as well as to determine the direction of rotation.

Uses of home electrical check devices

electrical testing devices

Sometimes a direct connection or disconnection of electrical wires occurs, Which caused confusion for some and a lack of understanding of some and the basic principles of electricity and dealing with them properly and checking the electrical wiring,

I would like to clarify all the reasons that lead to these problems and highlight the most important points that cause the circuit to be disconnected from the electricity network and check for electrical leakage (electricity leakage detector) As follows: –

1 – Disconnect one of the electrical wires from the connection :

Which is often in key screws, abrasives or circuit breakers that supply this source,

Because it is not electrically sealed or it can be said to be dimmed over time due to the contraction and expansion of the current and this often occurs at one of the junction points in electrical switches,

Devices (examine electricity smuggling at home) and protection devices such as circuit breakers or lamps.

So, I recommend regular maintenance of electrical appliances, Circuit boards are permanent dama on circuit breakers.

2- Relaxing the joints :

Which happens when one of the contact points in bundles of wires or in power switch boxes unwinds means a wire escapes from the main screw,

Thus the power supply line gets disconnected from the light bulb or its related charge

3- Melting part of the wire:

Connected from the switching or disconnecting device to the load to which it is connected and limiting when there is no means to protect this circuit and also occurs in the case of using wires of thickness (diameters)) that cannot withstand the passage of high current through the feeding of the load to which it is connected) increase in ampere draw on the wire), Exposing the wires to a very high temperature,

Thus melting inside tubes (tubes) or inside squares or if it is visible.

4- Cut the wires :

This occurs in electrical appliances that are permanent movements such as laundry or electrical connections and other devices with wires related to constantly moving with it.

Damage to contact points:

  1. In aprons and electrical appliances (such as connecting circuit boards)

6 – Cut into a protective device:

(interrupter) connected to a cycle with a cycle or load and this is mainly the result of an increase in the load on this segment,

Which leads to the separation between the circuits and layout of the building’s power grid.

(home electrical check)

To detect parts or disconnect electrical circuits, It is divided into several parts, And each part is detected individually these parts are wires,

and switch, protection device, and the base of the lamp, ports and points of contact.

There are two simple ways to detect (home electrical contact):

1 – Detection by means of a resistance measuring device called an ohmmeter in this process. It is first necessary to disconnect the circuit (the load) from the current source to disconnect the device from electricity,

Then the detection starts in which the end of this device is connected to a part of the room to detect the presence of parts or separation inside.

The indicator on the device indicates a zero resistance value. There is no break between the ends of this part.

2 – Detection by using a screwdriver where the hot line connects to one end of the wire or grinding cutter or the part to be tested We touch the screwdriver test cap with the other end of the wire or cut if the screwdriver light is evidence that there is no cut in wire or cut, But if there is no light,

It indicates the presence of parts in the wire or a piece to examine (Electricity Testing Company).

right Now, In order to understand and correct some verbal errors in the names of this case, I would like to clarify the following for an electrician or circuit breaker that works on me (solution of high electric bill)

Short circuit means hot line connection (VFA) with a neutral line directly in the electrical circuit or device, Thus forming a circuit called short (short) and short or

An electrical circuit in a circuit means that two wires are touching or touching a wire with a metal tube or pipe. In this case, A short circuit may occur or cause an incorrect circuit.

Searching for different shapes and places. Including the following:

  1. Bad connection, as the wires have been exhausted through the passage of a high voltage of electricity for a long time, which leads to a direct impact on the occurrence of (electricity in the house)

2- Damage to the wire insulation and this often happens when the wires inside the pipes are incorrectly pulled for expansions such as the friction wire at the corners of the pipe,

Which leads to the injury of the electrical corona.

electrical testing devices

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