How to use the indicator with a screwdriver: species tool

There are situations when in the house there is a problem with the wiring and electrical appliances. Each time the cause is not always convenient wizard: high payment for services, long waiting times. Yes, and in addition to do it is not always appropriate, because a lot of trouble can be resolved on their own in just a few minutes. For example, if there was a loss of contact.

The main problem in this situation - to find a problematic place. For this purpose we developed a special tool - a screwdriver indicator. It is distinguished by reliability, versatility and affordability. In today's article we will go exactly about this tool.

How does the indicator screwdriver

Standard indicator screwdriver has the following principle of operation:

• during contact with the phase conductor tip thereon electric current flows;
• after the electric current is passed through the stinger, it passes through a resistor of which it is 1 Mohm - absolutely safe with the current strength reduced to a value for person;
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• bypassing the resistor, a current passes through the built-neon lamp, which contributes to the emission of gas injected inside;
• current balances go into the ground through the human body using a screwdriver indicator.

Thus, the entire process of determining whether a certain current to electrical circuit portion only takes a few seconds.

variety of tools

In total there are several kinds of screwdriver indicator. Let's stop more in detail on each and look at how they work.

The most simple and primitive indicator tool - this is a common screwdriver with integrated lamp. It lacks an active power source.

Its operating principle is characterized by its simplicity and outstanding. Once the tip of the tip voltage falls, it passes through the resistor, which is integrated into the handle. After the resistor is supplied to the lamp. On the end part is a metal blyamba which acts as a second contact.

In order to identify the absence of voltage, or its availability, blyambu need to close the finger at a time when the sting of the tool touches the surface. Such screwdriver characterized by its low price, because it allows to determine only the phase and zero.

Indicator with battery screwdriver. We can say that it is an improved version of the previous one. As it is integrated battery, which acts as a power source. Also screwdriver equipped with a bipolar transistor. Such a tool is characterized in that it has an expanded range of options, because it allows you to define:

• phase and neutral;
• find where the minus and plus where in the vehicle;
• failure to find a place in the electrical circuit;
• check the fuses.

In addition, this indicator tool allows you to find hidden wiring, however, the error will be quite high.

To verify the presence or absence of voltage does not need to cover the metal blyambu finger. Such a screwdriver - the most popular, common and universal indicator tool.

Tester with electronic control unit and the LCD screen. It is equipped with an audible alarm, which is triggered in the presence of the mains voltage. The most modern version of this type of tool. Tester can determine the current in the power supply voltage range of 12 to 220 volts. The LCD display shows the numerical value of the supply voltage.

Reference. In fact, this is a screwdriver multimeter, however, in a very simplified version.

Many experts believe that the purchase of such a tool - unnecessarily and this is for two reasons:

• the cost of the tester is 3-5 times higher than the cost of the previous version;
• in the case of failure of any of the elements of the repair will be energy-intensive and time-consuming exercise. Moreover, the market is quite rare to find parts to this indicator, so if there is a fault, it is necessary to buy a new instrument.

Using indicator screwdriver: how to verify a zero phase and

Now let's look at how to use a screwdriver. First of all, remember safety. The basic rule - any work on power grids need to be carried out without packet switches that are located in places of entry into the house or apartment. It is also necessary to test the functionality of the tool.

It is necessary to remember one of the basic properties of the electric current: it always passes through a conductor with the lowest resistance from plus to minus. If the chain is broken or blocked, then nothing will work.

Standard single-phase mains is. The voltage passes through a single wire - for positive, and which is called phase. The second wire - is zero, it leads to the transformer. The third wire in the socket - this ground. It serves our security, since the voltage in contact with the metal case he takes it "to the ground."

To check where the phase, zero and where you need to insert a screwdriver in the indicator working outlet. If the tester is not the batteries, the tip must be touching the surface with your finger and press blyambu, then follow the indicator readings.

If the instrument lamp lights, this is the phase wire. If the contact bulb is not lit LED, it indicates that there is no voltage in the network, or you are in the neutral wire.

Check the indicator screwdriver

The method described above allows you to test and performance screwdrivers. If you know that a working electrical outlet, and the lamp is not lit up in any of the holes, so the tool is faulty. To determine its performance may be another way - using light bulbs by touching the sting to her penny. If the indicator lights up, and the light, and light itself is undamaged.

There is also a non-contact method of checking performance screwdrivers, t. E. it does not imply direct contact with the conductor. The tool you need to take for the sting and bring snout (touch pen) to a power outlet. If the indicator lamp lights - fix tool and the voltage in the circuit is.

Also, this method is suitable to search for hidden wiring. However, as mentioned above, it has a small error. If the walls have reinforcement, it will distort the signal, and therefore, this method is absolutely useless in the case of concrete walls.