Electronic indicator screwdriver how to use. Testers of a non -contact type voltage

How to use an indicator screwdriver and why it is needed

Today I will tell you about the indicator screwdriver, for which it is needed and most importantly, how to use it.

Indicator screwdriver, phase indicator, or, as it is briefly called the people, indicator or probe. This is the device with which you can determine the phase. Electric current, this is precisely this main purpose.

It is important to know that for some reason few people talk about this, but there are two main types of indicator screwdrivers-passive (without battery) and active (with a battery).

And their capabilities, and most importantly, the rules for working with them are very different.

Scope of indicator screwdrivers

The voltage indicator is used for the following purposes:

  • Determination of the phase, zero wire;
  • Determination of the polarity of the batteries and batteries;
  • Search for hidden (walled) in the wiring wall;
  • Search for a cliff in an electric circuit;
  • Checking the operability of heating elements, incandescent lamps, diodes and other radio components.

Using a Non-Contact Power Detector #Shorts

In addition, using digital models of modern this device, it is possible to determine the voltage value, the location of the positive and negative electrodes on the diode.

Types of indicator screwdrivers

Depending on the functionality, the method of use (contact and contactless), data indicator, forms of indicator screwdrivers can be several types.

By type of power source, indicator devices can also be divided into:

  • Screwdrivers on batteries. Have an autonomous power source, which allows them to be used in contactless mode, for example, when searching for hidden wires under plaster;
  • Screwdrivers without batteries. Are used by contact method, since they do not have an autonomous power source, their functionality is limited.

Note: the human body has natural resistance, thus acting as part of the chain. Therefore, during contact check, it is necessary to touch the sting of the screwdriver to the wire (a current conductor), and put the finger on the end. At the end, the current strength is minimal, so a person will not hit the current.

Indicator screwdriver with neon bulb

As a rule, such screwdrivers have a rather high (from 60 V) threshold indication of the voltage. They can be used when connecting switches and counters, when determining the alternating current of the phase in the circuit. But such screwdrivers will not work to search for a wire break.

Indicator screwdriver with neon lamp

Indicator screwdrivers with display

There are rather compact models equipped with a display. In such screwdrivers, data on the presence of voltage are displayed on the screen.

Universal indicator screwdriver

This tool is universal, a special chip located inside the device.

Multifunctional indicator screwdriver

These models have several testing modes during operation:

  • Contact. In this case, the voltage “reports” the tanned light bulb;
  • Non.Contact. Characterized by low sensitivity;
  • Contactless with high sensitivity. Not only a light bulb, but also a characteristic sound signal “reports” the presence of stress.
electronic, indicator, screwdriver, contact

Note: multifunctioned screwdrivers are quite convenient and effective. However, work needs batteries that need to be changed often.

Indicator screwdriver with LED

Such models are similar to previous ones with neon lamps. However, with these tools it is allowed to work with electric networks, where the voltage is below 60 V.

Despite its simplicity, the screwdrivers with the LED can be called multifunctional, since they imply the definition of both contact and contactless ways.

Electronic indicator screwdriver

Among modern models, a multifunctional electronic screwdriver can be distinguished, which has a display and is equipped with light and sound indicators. However, the cost of such devices is much higher.

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Checking different devices

Contact method

In order to find out the integrity of the internal circuit of the electric lamp, you need:

  • The indicator probe attach to the input contact of the lamp.
  • At the contact plate of the screwdriver, attach the finger of the hand.
  • With the second hand, take up the base of the lamp in order to close the chain between your hands.
  • If the device lights up, then the working lamp.

The tester allows you to easily check the interpretation of the internal circuit and the working condition of the electric heating element for the presence of a breakdown to the body. In both cases, a universal or LED device is needed.

  • In order to identify the contact of the device with the housing of the current.Carrying elements, it is necessary to take it in the hand. It is source of electric charge.
  • With the second hand, you need to take the tester so that one finger is located on the contact plate, and take turns attach the probe to the terminas of Ten.
  • During the presence of breakdown, the chain will be closed, and the device will light up (show the phase). The heater must be changed.

Search for the switch position

All switches in the house by default are required to be in this position that to turn it on, it is necessary to press the top of the key, and to turn off to the lower part. Because of what, during the installation, a situation appears when the key must be turned over after installation due to the fact that it closes the chain with the lower part. With the help of a screwdriver-tester, in advance by “calling” the scheme, this problem can be avoided.

Contactless method

After installing a chandelier with several lamps, there is a need to determine the correctness of the connection. Using a universal tester, this is very simple. You need to switch the device to the required mode (h or l) and bring to the offline.

If the sound signal sounds after this, and the corresponding light lights up, then near the lamp there is an electric field, respectively, the wires are connected with a common phase wire incorrectly. If everything is fulfilled in compliance with the rules of security requirements, then the indicator will only work during the inclusion of light.

Determination of the site of the cliff

During the power supply of electrical appliances, a situation appears with the help of an extension cord when the cliff is obvious on the network, but it is not known exactly in which place it is located. If the outlet is in working condition, then you need to check the extension cable and the device for the presence of a cliff. To do this, you need to turn on the device into the network and the tester is carried out along the entire length of the circuit in mode L. On the site where the device does not respond to the presence of an electric field, there was a cliff.

If a malfunction has not been found throughout the entire length, then it is necessary to re.Carry out the procedure, turning the fork in the switch so that the current goes along the other cable vein. If in this case a break is not found, then the problem must be sought directly in the tool.

Checking the integrity of the chain

Before checking, we are convinced that the test device is disconnected from the circuit and is not under current.

Click with a finger of one hand a screwdriver Piglet and touched the probe to any terminal. With the second hand, close the other terminal of the studied chain.

The burning LED will inform that the network has no gap.

How to use an indicator screwdriver

When working with a power grid, you need to follow the safety rules and know how to use the tester tester correctly. The main point is disconnecting package circuit breakers in electrical circuits when disassembling switches, sockets, etc. You should also make sure the device’s performance, because the accuracy of the readings and the safety of the user (master) depends on its technical condition. The tool should have a whole case. Without chips, cracks and so on. In the presence of minimal damage, the device is replaced, since the consequences of the shock can be irreversible.

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The working condition of the tester is checked by closing the circuit with the hands (applying the fingers to the probe and the “heel” of the probe at the same time). Lack of glow happens in two cases:

  • When failing of the device, which should be replaced. Repair is not appropriate, so the efforts spent will be much more than the cost of a new tool.
  • With the batteries sitting, which are required to be replaced with new elements. When installing them, attention is paid to polarity, otherwise the device will not function.

Choice parameters

How to use an indicator screwdriver and what it can, you already know. Now you need to find out how to choose a suitable model. Even the most difficult indicator screwdriver costs no more than 12-15 (these are European manufacturers, the “Chinese” times are three times cheaper). Ordinary can be bought in general for 20 (about 25 cents). Despite this, you also need to choose it wisely. In the farm, it is best to have two models: ordinary. As a phase detector, and with a contact type LED. For calling and determining the integrity of wires. “sophisticated” models require constant practice, otherwise you will just forget what and how to do. And reading a manual every time is not the best option.

Outwardly very similar, but functionality can be very different

Even if you have decided on the type of indicator screwdriver that you go to purchase, you need to choose it according to certain parameters:

  • For what tension.
  • If measurements must be carried out for a single-phase network, the measurement range should be 70-250 V or 100-250 V.
  • For three.Phase networks there are models that can measure the voltage up to 400 V.
  • For low-voltage ones, also their models-12-24-36 in.

Here, in fact, and all the parameters. The choice is not so complicated. The main thing is not to forget: before using an indicator screwdriver, be sure to check its performance and observe the rules of electrical safety when working.

Working with indicator screwdriver. 6 ways of applying.

The article will be about a simple indicator screwdriver with a battery, which contains a simple scheme based on a field transistor.

It is the use of a field of a field, expands the possibilities of using this indicator compared to simple screwdrivers containing only a neon bulb.

The first thing I would like to pay attention to is the stirding of the screwdrivers. Most of the models are not designed for full work on twisting and unscrewing the screws.

This is their additional opportunity. So for such work, always use ordinary screwdrivers with hardened stings or corresponding bits, and not indicator options.

The most useful function of this model is the glow of the LED while touching the sting and contact at the opposite end.

In fact, this is an indicator of checking the integrity of the chain. How it can be used in everyday life will be considered below.

Be careful if the indicator will be fired over the entire wall, maybe you have a leak and a closure somewhere.

To find the phase in the outlet or on the cable, you need to touch the screwdriver screwdriver. At the same time, you cannot touch the metal patch at the end of the indicator!

If you do this, the indicator will shine equally in both sockets of the outlet, where the phase is and where zero will not be possible to figure it out.

True, the sensitivity of such a screwdriver can be not only a dignity, but also a disadvantage. For example, in a three.Phase network of 380V, when the phases are located close to each other, the induced voltage can be influenced on the tool.

Therefore, for a simple determination of the lack of voltage, an indicator without batteries with a neon light bulb, is still more reliable.

This device is better to use precisely because of its additional capabilities.

The capabilities of a simple indicator screwdriver can be significantly expanded and many simply do not know that in addition to the usual verification of the presence or absence of stress, this device can perform many tasks and look for various malfunctions.

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This is how it can be used in practice.

This check can be done directly in the store, having nothing at hand except the screwdriver. Take an ordinary light bulb, grasp the metal base with one hand, and the finger of the other hand touch the contact in the upper part of the screwdriver.

After that, the sting touches the central contact on the light bulb.

If the lamp is working, the LED will light up.

electronic, indicator, screwdriver, contact

True, this verification does not give 100% confidence, since if the lamp is depressurized, it will not shine, although the chain remains the whole.

You can also easily check the serviceability or breakdown of the heating heater. At the same time, it does not even have to be pulled out of the equipment.

It is enough to provide free access to contacts. Before that, all outsiders are connected to them, you need to throw back.

Non-Contact AC Voltage Detectors

The check is very simple and not intricate. With one hand, touch the heating of one contact, and the sting of the screwdriver of the other. The finger of the second hand should again be on the metal heel of the probe.

If the indicator light does not burn, then the heating element is not working and inside it is a break in a heating spiral.

Thus, you can check any heating elements. For example, the boiler is checked directly on the fork itself, even nothing needs to be disassembled.

So that when repairing, mount the switch correctly, that is:

You can also use the probe and call the contacts.

Previously, the switch is disassembled. His contacts are usually closed and therefore just crawls to them to them.

Take any metal item, for example, a clip or clove and touch one of the contacts. It doesn’t matter what. Upper or lower.

Indicator screwdriver is made on another contact. In the disconnected position of the circuit breaker, the LED does not burn and vice versa. Leave the switch in the included state, collect it and in this position mount it on the wall.

If you are engaged in major repairs in the apartment, then you must have encountered a situation when, after removing the old plaster, some previously unknown wire is suddenly discovered.

How to check an indicator screwdriver?

Since the indicator screwdriver is designed to work with the voltage, it is very important to constantly monitor its good condition. The case should be whole, without cracks. Each time before starting work, make sure its performance. Check the serviceability by touching the conductor in which there is a voltage. If a screwdriver with a power source, tap the sting and a patch on the handle. It should glow.

If the case is damaged. Replace the screwdriver, your safety is much more expensive than its cost. In screwdrivers with batteries, they need to be periodic replacement. The procedure is quite simple, unscrew the cap, take out the old batteries and insert new. The main thing is not to confuse polarity in batteries. Will not work. When the “filling” is noted, remember the sequence of the location of the elements, then the screwdriver will serve for many years.

If breakdowns occur in the screwdriver itself, it makes no sense to repair it. The price of a new one does not cost time spent. True, if you have several identical faulty screwdrivers, then you can try to add one efficient.

And always be careful when working with electric networks and devices. It is better to slowly double.Check the measurement result several times than to get an electric shock.

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