How to use a digital screen to display a large amount of data with a test pen
Neon bubble electric pen
The biggest feature of a neon bubble electric pen is that when the pen touches a charged object, the neon bubble will light up, and the pen head is a small screwdriver, which can also be used in emergency situations. There are now products on the market that can be disassembled and double batch heads can be easily replaced, which is very practical.
Usage method
The index and middle fingers grip the entire part of the electric pen, and the thumb presses on the metal at the back of the pen to cause an electric shock. Gently touch the charged body with the pen tip.
operational principle
Using the human body as the circuit, it lights up when the voltage reaches the working voltage of the neon bubble.
matters needing attention
1. Before conducting an electrical test, confirm the quality of the electric pen before determining the charged body to ensure that there is no misjudgment.
During electrical testing, the body should not touch the metal part at the front end of the electric pen to avoid electric shock.
3. Before use, carefully read the instructions and pay attention to the range. Some are between 50v and 500v, while others are between 110v and 500v.
4. Pay attention to distinguishing between AC and DC.
When unsure, use a multimeter and don't take chances.
6. Insulate the body from the ground.
Digital display pen.
A digital stylus is a device that displays voltage on the screen during measurement, and usually the maximum number displayed on the stylus screen is the measured voltage. But I always feel a bit unreliable.
Usage.
There are two test buttons on the electric pen for direct testing and inductive breakpoint testing. When using, we only need to select and touch these two buttons based on our own testing purposes.
Measure on/off.
This feature is the advantage of a digital display pen over a neon bubble pen. When measuring, it is necessary to disconnect the power supply, hold one end of the wire with one hand, touch the sensing button with the thumb with the other hand, and touch the other end of the wire with the tip of the electric pen. The light bulb illuminates, indicating that the wires are connected.
Measure breakpoints.
This function is not very useful, especially for multi-core cables that cannot be tested and are not sensitive.
Although this type of electric pen directly displays voltage, its accuracy is questionable. Many electrician friends have reported that sometimes it is not accurate at all and may even lead to misjudgment.
The light is too strong to see clearly, the light is too dark to see clearly, and the reading sometimes flickers, which is its shortcomings. So I usually don't use digital pens.
Sound and light alarm induction pen.
This type of electric pen is a new product developed in recent years. It is very convenient to determine whether an object is charged or not, and it can distinguish between zero and live wires at a glance. It is not limited by environmental light factors, especially in measuring breakpoints, which is very practical. The disadvantage is that it does not display voltage, at least so far, I have not used this function myself.
This type of electric pen has a plastic casing that reduces the possibility of electric shock. It is super simple to use. When measuring, turn on the power first, and some simply press and hold the power button. If the electromagnetic field is strong and there is no need to contact a charged object, an alarm will be triggered, which indirectly reduces the possibility of charging.
Personal experience shows that all three types of electric pens have their own strengths, but they can only test whether an object is charged and cannot accurately determine the voltage. When we need to measure the accurate voltage of a charged object, a multimeter is still reliable.
