Antipyretics for children are prescribed by a pediatrician. But there are emergency situations for fever when the child needs to be given medicine immediately. Then the parents take responsibility and use antipyretic drugs. What is allowed to give to infants? How can you bring down the temperature in older children? What medicines are the safest?
It will be useful for anyone to know exactly how the hidden or house passes. And there are several reasons for this.
To install various equipment during repairs, you will probably need to drill holes in the walls. And there is always a chance that at such moments the drill will hit metal elements, live parts. A device for finding hidden electrical wiring will help to cope with the problem. This is also necessary when the old wiring is changed to a new one.
- We use in practice
- Conclusion
The main principles when searching for hidden wiring
When carrying out repairs, we do not always have at hand a special diagram showing the places where the hidden wiring wires are located. Often even the basic requirements are not met, according to which any wires must strictly maintain their position in a vertical or horizontal plane. Detection of hidden wiring involves the use of two main approaches.
- If the network is working, alternating current will pass through it.
An electromagnetic field occurs around any wire through which electricity flows. This is one of the basic laws in physics. It is this property of the electric current that is used by most searchers to help with the identification of hidden elements.
- You can also use the so-called generator with an inductor. The electromagnetic field is distorted when wires or parts of fittings fall on such a hidden wiring detector. The indicator of the device will immediately show the corresponding data.
We use in practice
Price, functionality and design are the main differences between the different seekers that are available on the market today. E121 is a hidden wiring indicator that is very popular among electricians. The finder has several advantages:
- Easily finds the inner network inside the plaster of any materials, at a depth of up to 7 cm.
- Relatively inexpensive device with no serious requirements for operation.
- The cost is about 1500 thousand rubles.
The MS wire finder is another series of devices originally from China. Low price for many becomes an important advantage. Devices can react not only to wires, they are also affected by other metal structures nearby. A definite minus for this device.
You need to have some experience to distinguish the signal of a wire from the signal of another metal part.
When mounting hidden wiring, it is necessary to provide access to its elements in advance in case of, for example, a break. At least this applies to switchboards and lighting boards. A decorative and functional solution can be
Manufacturers from foreign countries produce varieties of seekers with a higher cost. With the definition of a hidden trace of electrical wiring, for example, the development from Amprobe, the VP-440 device, will help. It also performs other actions, it can find places with breaks. It costs about 35 dollars.
Internal electrical networks. How to find them quickly and easily
There are also alternative detection methods. A radio tuned to a 100 kHz medium wave frequency is one such solution available. It is enough to move the device along the wall. So you can easily understand exactly where the hidden wiring is. Crackling and noise appear in the receiver when passing it through the electrical wiring.
To save on electricity bills, our readers recommend the Electricity Saving Box. Monthly payments will be 30-50% less than they were before using the saver. It removes the reactive component from the network, as a result of which the load and, as a result, the current consumption are reduced. Electrical appliances consume less electricity, reducing the cost of its payment.
You can also use a modern smartphone to solve this problem. It is enough to install a special program and make sure that the device is equipped with a so-called magnetic sensor.
Is it possible to make devices with your own hands?
Field-effect transistors, for example, from the KP103 series, are excellent for this.
This element has its own characteristics. Its resistance changes when the gate is subjected to an electromagnetic field. The battery and the indicator are switched on in series.
An antenna that looks like a piece of wire can be connected to the gate of a transistor in order to increase the input signal. It is necessary to drive along the wall with an antenna to find hidden wires. By the maximum signal in special headphones, it is easy to understand exactly where they are. A low frequency amplifier can also be added, only the device will have more sensitivity.
A multivibrator and LED could be a more affordable alternative to a conventional amplifier in a circuit. The first is simply triggered if hidden wiring is found. And the light source just flickers.
About the features of work in some modern models
There is, for example, the MS-158 M finder. It can even react to nails and rebar, and other metal elements. Because professional electricians are not very fond of this device. It takes some time to get used to its features.
There is an earlier model of the MS-158 finder. She received the designation MS-58M. The main difference is in the case design. It is more practical and modern when it comes to the 158 series.
In the form of ordinary indicators, testers such as MS-48, MS-18 and so on are performed. Require accuracy from the user with any level of training. Even those who understand the general principles of operation, but have no practical experience in dealing with them, can encounter problems.
The indicators will be constantly lit if they encounter an increased level of humidity, even in small limits. But with proper skill, the accuracy will be maximum, the deviations will be plus or minus 15-20 centimeters.
There are better testers, for a professional approach. A generator with a certain frequency is connected to one of the ends in these devices. A receiver is carried along the cable, which is tuned to the same frequency. If the tone has changed, this is the place we need. But such devices are most relevant in mobile electrolaboratories, since they have a rather high cost. Unlike screwdrivers, for example.
About semi-professional devices
For the most part with a universal purpose. They help determine the composition of the wall that is in front of them. Detect the presence of ferrous and non-ferrous metals. Testers generate their own electromagnetic field. It changes readings and characteristics as it passes through different surfaces. They analyze the data obtained quite accurately and determine what exactly is in the wall.
Self-calibration of the sensing element makes devices with a microcontroller very accurate compared to other classes. It is useful to find behind the wall not only wires, but also fittings responsible for amplification. Then you can not be afraid that during the repair the drills will fall on the pipes, break through the entire system. A simple screwdriver will not cope with such a study.
One of the simplest models is the BlackandDecker tester with a microcontroller. The indication is based only on LEDs. The device can be reconfigured as quickly as possible to search for wood or metal thanks to a hard mode switch. The device beeps if it is certain that it is ahead. An indication is placed on a separate LED, indicating that there is electrical wiring somewhere nearby in the wall.
The error in detecting objects in such models is minimized. Scanning is carried out only in one direction. The ZirconTriScannerPROSL tester can help with the detection of wood and metal frames. The LED highlights approximately the direction in which the object of interest is located. Regardless of the selected scan mode, the presence of electrical wiring is constantly detected.
Conclusion
It does not matter which device the buyer chooses. It is important to check its performance before starting operation. It is best to test devices in an area where the location of the networks is already known. This will help you understand which antenna position is most convenient.
Sometimes testers react poorly to the network due to dead batteries. It is necessary to create conditions under which the device gives the most accurate readings.
