Various common uses of the stylus
Neon Bubble Pen
The most important feature of neon bubble electric pen is that when the pen touches the charged body, the neon bubble will glow, and the head of the pen is a small screwdriver, which can also be used in emergency. Now on the market there are removable, double batch head random replacement products, very practical.
Usage
Index finger and middle finger hold the absolutely no part of the electric pen, the thumb presses the back end of the electric pen metal contact, with the tip of the pen lightly touch the charged body.
Working Principle
Using the human body as a circuit, the voltage reaches the neon bubble working voltage when the light.
Precautions
1. Before checking the electricity first in determining the charged body to confirm that the pen is good or bad, to ensure that there is no misjudgment.
2. When checking the electricity, the body can not touch the metal part of the front of the pen to avoid electric shock.
3. Read the manual carefully before use, pay attention to the range, some are 50v~500v, some are 110v500v.
4. Pay attention to distinguish between AC and DC.
5. When you are not sure, with the help of a multimeter, do not leave it to chance.
6. Body and earth insulation.
Digital display electric pen.
Digital electric pen, that is, when measuring, the screen will show the voltage, usually the maximum number displayed on the screen of the electric pen is the measured voltage. But I always feel a little unreliable.
Usage.
There are two test buttons on the top of the electric pen, direct test and inductive breakpoint test. When we use it, we just need to choose to touch these two buttons according to the purpose of our test.
Measurement of pass-through.
This feature is the benefit of the digital display electric pen over the neon bubble electric pen. To measure, you need to disconnect the power supply, pinch one end of the wire with one hand, touch the sensor button with your thumb with one hand, and touch the other end of the wire with the batch tip of the pen. A light bulb glows, indicating that the wire is on.
Measure the break point.
This function is not very good, especially the multi-core cable line can not be measured, not sensitive.
Although it is said that this electric pen directly displays the voltage, but his accuracy is doubtful. Many electrician friends reflect that sometimes it is not allowed at all, and even produce a misjudgement.
The light is too strong to see, the light is too dark to see, the reading is sometimes light and dark, this is its shortcomings. That's why I don't usually use digital electric pens.
Sound and light alarm sensor pen.
This pen is a new product in recent years, to determine whether the object is charged is very convenient, distinguish between zero and firewire is also clear, not subject to the limitations of the environmental light factors, especially the measurement of the breakpoint is very practical. The disadvantage is also does not show voltage, at least so far, I have not used this function.
This electric pen through the body of the plastic shell, reduce the possibility of electric shock. It's super easy to use, you turn the power on first when measuring, in some cases you press and hold the power button directly. If the electromagnetic field is strong, do not need to contact the charged body will also be alarmed, which also indirectly reduces the possibility of us charging.
Personal experience, the above three kinds of electric pens have their own strengths, but they can only test whether the object is charged, and can not accurately determine the voltage, when we need to measure the exact voltage of the charged body, or multimeter reliable.
