What is the principle of an electric pen? What does it mean to display 12V on an electric pen
1, What is the principle of an electric pen
An electric pen is an auxiliary safety tool used to detect whether low-voltage conductors and electrical equipment casings are live or to distinguish between live and neutral lines in a power supply. Do you know the principle of an electric pen?
Low voltage voltage tester is a tool used by electricians to detect whether w
ires, appliances, and electrical equipment are live. It mainly consists of pen heads, neon bubbles, voltage reducing resistors, springs, and other components. When the current passes through the tested device, the human body, and the earth to form a circuit, its leakage current causes the neon bubble to emit light and work.
The principle is Ohm's law. When the potential difference between a charged body and the earth exceeds a certain value, neon bubbles will emit light. If it falls below a certain value, they will not emit light, thus determining whether low-voltage electrical equipment is charged.
2, What does it mean to display 12V on an electric pen
Many people like to use an electric pen to test the voltage value, and it is best not to use this type of pen for testing, as it may cause some errors. Now let me introduce to you what it means to display 12V on an electric pen.
1) The display of 12V on the electric pen is not leakage.
2) "," refers to a voltage value of 12V in a certain area of the product being measured, but it is advisable not to use this number to display the test pen as the displayed number can easily mislead the user.
3) Also, when using, be sure to touch the metal part at the end of the test pen with your hands, otherwise the tested data will be inaccurate.
