Screwdriver with display how to use

Rating of the best producers

If we talk about the rating of the best, the Chinese products are not in last place, on the contrary, they occupy the leading positions due to their low price, ease of use and quality of assembly.

When choosing such a tool, you should pay attention to the manufacturer, if you don’t want to waste money. If you plan to perform installation work on electrical networks, then you should take a closer look at Wera. Their products are commercially available with a dielectric coating and a cross-edged awl on the end. Screwdrivers are made of high-quality and reliable materials. When working in difficult conditions, better screwdrivers from the company MATRIX simply can not find, because they allow you to reach the point even in hard-to-reach places.

KRAFTTOOL products are used when it is necessary to screw in and unscrew bolts for a long time, and at the same time to check the voltage in the course of the assigned task. Such indicator screwdrivers are battery-operated.

Chinese manufacturer FIT offers a budget tool with lots of features. As for quality, it is average.

If you want an indicator screwdriver that meets all requirements, then you should pay attention to the products of the German company GROSS. These products have proven to be only good, so they are valued by professionals.

There are also American manufacturers that are valued by the consumer, and Stanley is one of them. Professionals and amateurs alike note the ease of use of this brand of indicator screwdrivers.

There are also our domestic models, deserving no less attention. Take STAYER as an example, a brand that brings affordable products to the market for the average man. The quality is high and the durability is excellent.

Battery-operated indicator screwdriver

This is a more advanced tool that has a bright light bulb. It’s easy to use because you just need to touch the wire with the stinger to check for current without touching the metal contact on the handle. With this indicator you can easily check a break in the wire. To do this, clamp the metal pin and use the stinger to touch the dead wire. With the other hand you need to touch the other end of this wire. If it is broken the indicator will not show anything, but if the wire is good, the LED will light up.

Battery-operated indicator screwdriver

Any kind of wire can be checked this way. For example, to test an extension cord, you need to unplug it and make a metal jumper from a piece of bare wire. Insert a jumper into one of the sockets of an extension cord to short-circuit its wires. Hold an extension cord plug by hand and touch one contact with your fingers, and touch the other contact with a screwdriver with the metal top clamped on. If the wire is intact, the screwdriver indicator light will be on.

Indicator screwdriver beeps and lights 2

This model can be used as an indicator of live wiring. That is, the unit allows you to identify live, insulated wires on the surface of the wall or embedded in a shallow wall. To find the wire, grasp the tip of the screwdriver with your hand and guide the handle of the screwdriver along the wire or wall. A light will indicate that there is current in the wire or that there are plugged wires in the wall. This feature is extremely useful in the case of repairs when it is necessary to break through a wall and the location of hidden wiring in it is unknown.

How to Use the Indicator Screwdriver

When you work with indicator screwdrivers, especially contact models, first of all you must follow the technology of their use and the rules of electrical safety. It is forbidden to touch the bare probe with your hand, it is necessary to hold the device by the case covered with insulation.

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When using a conventional rather than a general purpose screwdriver, the probe touches live parts, and the touch button is simultaneously clamped to the handle. If there is current and the screwdriver has touched a phase, the neon bulb will begin to glow. No light indicates a neutral or grounding conductor.

It’s a little harder to work with a battery-powered LED. Before you use the screwdriver indicator, you need to perform a functional test. To do this, touch the probe and the contact button at the same time with your hand. When the LED lights up, it means the tool is ready to work.

The peculiarity of this device is that there is no need to touch the button during the phase check. It is enough to insert the probe into the socket and touch the pins. The light comes on, so it’s a phase. If the LED does not light up, you can press the contact button. A light indicates neutral, and its absence indicates the presence of ground or a broken wire.

For all other tests it is also necessary to press the button. In this way you can check the continuity of the conductor, and the fuse or the heating element. for efficiency, to identify other malfunctions. When searching for a hidden wire with the tester, you need to take the screwdriver by the sting, and use the button to drive it to the places of the proposed lines. In this case the LED will light up, but the wire itself should be live at this time.


Indicators with built-in batteries allow you not only to find the phase in the network, but also to test the wires to assess their integrity, determine the location of breaks in the conductors, check fuses, diodes and even find hidden wiring in the wall.

As I wrote above, an ordinary indicator screwdriver, without battery, works only with external voltage, which is what makes the bulb inside the housing glow.

Tester with a battery, is devoid of this disadvantage and due to the internal power cell, can both receive an electrical signal and generate it, which makes it possible not only to determine the external voltage, but also to check the operating zero or ground, as well as, for example, the testing of conductors.

The design of the active indicator screwdriver:

The design is generally similar to an ordinary indicator, but a number of elements are added, most importantly the batteries.

The principle of operation is also slightly different.

Digital multimeter tester: How to use it

This tool is an improved version of the active indicator. It is a voltage tester. You can use it like a normal device, too. Professionals call this tool “multimeter”, because it can perform several functions:

Such testers have switches that adjust the sensitivity level. The device can be used in contact and non-contact mode to detect the presence of voltage and voltages.

The device has not only a light, but also an acoustic signal. Design features a digital display that shows measurement values.

Important! With the multifunction tester is easy to buy additional pliers, which can be used to determine the current strength without removing the insulation layer.

Digital multimeter tester has an electronic display

In order to know how to find phase and zero with this type of indicator screwdriver, it is necessary to carefully study the description and instructions of the device. Some models, in addition to the above functions, can check the temperature of the equipment under current. Such features are important for those who monitor electrical switchboards, electric motors, etc. д.

Almost all modern homes are equipped with cabinets, from which the wiring comes. And relatively powerful motors are not uncommon in the household. That’s why a multifunction tester is often needed in the home, too, rather than a simple indicator screwdriver.

Checking various devices

Contact method

In order to find out the integrity of the internal circuit of the electric lamp, it is necessary:

  • Put the indicator probe to the input contact of the lamp.
  • Put a finger of your hand on the contact plate of the screwdriver.
  • Grasp the lamp base with the other hand to close the circuit between your hands.
  • If the device lights up, then the lamp is working.
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The tester makes it easy to check the internal circuit breakage and the operating condition of the electric heating element. In both cases, you need a universal or LED instrument.

  • In order to detect the contact of the device with the body of current-carrying elements, it is necessary to take it in your hand. it is source of electric charge.
  • Hold the tester with the other hand so that one finger rests on the contact plate, and in turn place the probe on the terminals of the heating element.
  • If there is a breakdown, the circuit will close and the device will light up (show the phase). the heating element must be replaced.

Finding the position of the switch

All switches in the house are required by default to be in such a position that the top of the key must be pressed to turn on and the bottom of the key to turn off. Because of what during the installation there is a situation where the button must be turned after installation because of the fact that it closes the circuit with its lower part. With the help of a screwdriver-tester, having “tested” the circuit in advance, this problem can be avoided.

By non-contact method

After installing a chandelier with several lamps it is necessary to determine the correct connection. With the universal tester, you can do it very simply by switching the device to the desired mode (H or L) and bring it to the switched off chandelier.

If after that a beep sounds and the corresponding lamp lights up, then there is an electric field near the lamp, respectively, the wires are connected to the common phase wire incorrectly. If everything is done in compliance with the safety requirements, the indicator will only work when the light is on.

Identifying the breakage area

During the powering of electrical appliances with an extension cord there is a situation where the break is evident in the network, but it is not known exactly in what place it is located. If the socket is in working order, you need to check the cable of the extension cord and the device for a break. To do this, you need to plug in the device and use a tester to run the tester along the entire length of the circuit in L mode. There is a break in the section where the device does not respond to the electric field.

If no fault is found along the entire length, it is necessary to re-run the procedure, turning the plug in the switch so that the current goes through the other wire of the cable. If in this case, too, no breakage is found, the problem must be sought directly in the instrument.

How to CORRECTLY use a screwdriver

How to use a tester

Working only with tools that are in good condition. This applies not only to batteries. It is important that there is no damage to the housing. For safe use, experts recommend to give up the insulating tape, replace the screwdriver with a new one.

As far as the mains is concerned, it must be de-energized. Even after turning off the power to bare parts of the wiring can be touched only with a testing tool. It is necessary to exclude moisture in any form, in order to eliminate the risk of electric shock.

Checking a circuit with circuit breakers switched off Source brigadir-info.for

Do not touch the metal sting while checking the wiring. Through it runs a voltage with parameters that are characteristic of the network in question. The body of the pen is made of plastic, capable of protecting the person from electric shock. For the rest, how to use the indicator screwdriver, the manufacturer writes in the instruction. Consider these recommendations in more detail.

Checking the tool to make sure it is in good working order

In addition to detecting external damage, you need to know how to test an indicator screwdriver for operability. It is enough to insert the sting into each socket of the socket that is known to work. A functioning device turns on the display when it makes contact with a phase.

How to operate the various devices

A simple instrument should be placed with the stinger on one of the conductors. If a contact plate is present, it should be touched with a finger. This is the end of the job, there are no other instructions.

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How to use the indicator screwdriver with an LED. the rules are similar to the simple tool for the contact sample. Only the contact plate is touched in order to check if the instrument is working properly.

Checking an Indicator Screwdriver for Functionality

Non-contact testers do not involve shorting the internal circuit. Here the indication is triggered at a distance from the mains in case there is voltage in a particular area. But a diode can also light up on an open circuit, which is important to consider when testing. But you can work with low-voltage systems.

Universal testers are a bit more complicated. Here there is a contact plate and light indication, which works when the internal circuit is closed. In addition, a toggle switch can be built in to set the various operating modes. The marking implies the following:

  • O. The mains test is carried out according to the principle of a simple screwdriver with a contact strip.
  • L. Operating principle identical to the battery-operated proximity switch.
  • H. High-sensitivity mode. It can be operated with a low response threshold, which aids in the detection of hidden wiring.

Tool with a toggle switch for setting the operating mode Source

How to Use a Screwdriver?

Let’s start by telling you what kind of indicator screwdrivers there are and what the advantage of each type is. To date, it is customary to use the following varieties of indicators:

screwdriver, display
  • The regular probe without the battery and with the light bulb. This one works quite simply: the current hits the sting, goes to the resistor, is limited and goes to the indicator light. Note that on top of the screwdriver there is a metal stud which is the second contact. To check the electrical wiring, a person’s finger must be on the nickel, otherwise the probe will not work (the circuit will not be closed). The advantage of such a model. low cost and the simplest design. The second advantage is at once the main disadvantage. the batteryless indicator screwdriver has a minimal set of functions, which allows only to find phase and zero, or check the voltage in the socket. You won’t be able to find a neutral or a phase wire break with this tool.к. Display threshold is quite high. over 60 volts.
  • Battery-operated indicator. A more advanced version of the probe. with power supply and LED. They look pretty much the same as the previous model, but if you look inside you can see the bipolar transistor shown in the diagram below. Use the battery operated indicator screwdriver for the following jobs: phase/ground, plus and minus (in cars), circuit breakage, and locating electrical wiring under plaster. The last feature allows you to locate a wire in the wall in a non-contact way, but the error can be high. The advantage of a battery-operated screwdriver is that, compared to a normal tester, it can even be used to test for continuity of conductors and fuses, which makes it multifunctional. For home use, a battery-operated indicator is best.
  • Electronic indicator screwdriver with LCD display. Such model is multifunctional and in addition to the fact that it includes all the functions described above, so it is additionally possible to determine the value of the voltage (in the range from 12 to 220 V). In addition, the electronic indicator can be used to detect hidden wiring. In fact, the electronic tester is a mini version of a multimeter. Due to the fact that its cost is 3-4 times higher than conventional indicators and at the same time the functions are not as many as those of a full tester, professional electricians use it very rarely. For self-taught home electricians, this version is also not recommended, because.к. Overpayment will be significant, and all the functions will still not be used.

Here we have considered the most popular types of indicator screwdrivers. Here’s how to use each model for the most common situations you’ll encounter at home.

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