Penggunaan dan safety measures for induction mengasuring pens
I believe many people have checked their own home wiring or electricity meters, so it is inevitable that induction test pens are commonly used electrical tools. A test pen, also known as a test pen, is a small tool used to test whether a wire is live or not. It has a very high usage rate and a wide range of applications. There many types of test pens, so do you know the use of induction test pens?
Usage method of induction mengasuring pen
Precautions for using induction mengasuring pens
1. Sebelum menggunakan the test pen, first check for safety resistance in the test pen, and then visually check for any damage, moisture or water ingress. Only after passing the inspection can the test pen be used.
Principle: There is a resistance inside the test pen and a luminescent element - a neon tube. The key lies in the neon tube. After the resistance is reduced, a voltage is applied to one end of the neon tube, forming a high potential. Your hand needs to contact the metal end of the pen tail, and now you are the ground wire. There are two thin metal wires in the neon tube that are very close but not connected. The neon tube is naturally filled with neon gas, and a suitable potential difference can generate glow discharge. If the voltage is too high, it will instantly break through the neon tube. At this point, the neon tube plays a safety role and will not cause too much harm to you. Low voltage can be more dangerous because traditional electric pens, such as neon tube electric pens, only light up at around 100V or above. It is not important to be careless. Additionally, do not let the electric pen enter water, otherwise you will know the feeling of electric shock.
2. When using a test pen, do not touch the metal probe at the front end of the test pen with your hands, as this can cause personal electric shock accidents.
3. When using a test pen, be sure to touch the metal part at the end of the test pen with your hand. Otherwise, due to the lack of a circuit between the charged body, the test pen, the human body, and the earth, the neon bubbles in the test pen will not emit light, causing a misjudgment and believing that the charged body is not charged, which is very dangerous.
4. Before measuring sama ada elektrik peralatan is live, it is necessary to find a known power source to test whether the neon bulb of the electric pen can emit light normally and can emit light normally before use.
5. When testing charged objects in bright light, special attention should be paid to whether the neon bubble truly emits light (or does not emit light). If necessary, the other hand can be used to block the light and carefully distinguish. Do not cause misjudgment by judging neon bubbles as not emitting light and judging them as having electricity as not.
