Indicator screwdriver - is a versatile instrument that should be in every home. If you do not know all the possibilities of the instrument, or have no idea how to use such a device, then this article for your reading.
Screwdriver indicator species
First, you need to get acquainted with the varieties of this instrument and to determine how they work:
- The most primitive tool in this category is a common screwdriver with integrated lampBut without an active power supply. The principle of operation of this tool is very simple and nezauryaden. Once tension on the stinger falls, it passes through a built-in resistor and is supplied to the lamp. On the front part of this indicator screwdriver has special metal plyamba. This second contact, to detect the presence or absence of voltage plyambu must cover at the time of touching the finger tip to the surface of the tested voltage. This type of instrument most budget, since by means of its use is possible only to determine phase and zero;
- Indicator screwdriver with integrated battery. This type of instrument is a logical extension of the above described analog. This device is integrated in a power supply battery, and also has a bipolar transistor. Functional capacity of such a screwdriver indicator is already more extensive. With such a tool can determine phase and zero, plus and minus identify the machine, find the open circuit. More can be determined in a contactless manner invisible electrical wiring, but subject to high uncertainty. With such a tool it is also possible to check the operability of fuses. In order to check the presence of voltage on the surface, there is no need to lay a finger plyambu. This is the most common and versatile instrument that should be in every home (see. circuit device such below);
- Tester with LCD screen and electronic control unit. It used to determine the current in the mains voltage in the range of from 12 V to 220 V. It's kind of a stripped-down version of "tseshki". Its purchase is no longer justified the action, as the cost of the tester is 5 times higher than the usual indicator screwdriver and replace high-grade "tseshka" such a tool can not.
How to use the indicator with a screwdriver
Initially, make sure the instrument performance. For this indicator screwdriver inserted into a working outlet and determine a voltage phase to zero.
Most often, this tool is used to determine phase and zero. If the tester without batteries, then We touch tip to surface presses plyambu finger and look at the indicator reading.
If the lamp lights up, it means that the phase wire or the surface is under stress. Does not light up the indicator indicates a lack of voltage or a neutral conductor (see. figure below).
You can check the integrity of a conventional light bulb (see Figure below). To do this, take it in your hand, hold your fingers central lamp contact (where the thread) or to touch the sting to the penny, we lay another finger plyambu.
If the screwdriver LED lights, the lamp is working. You can also identify the presence of the wiring in the wall, but due to the extremely large error, use this tool for such purposes is strongly discouraged.