What is the use of the test pen
1. To establish whether or not the thing is charged. One pole is connected to the tip, while the second pole is attached to the other end of the pen with a high resistance in series. Its internal construction is a neon bulb with only two electrodes, which is filled with neon gas and is generally referred to as a neon bulb. A light is produced between the two poles of the neon bubble when the voltage between the two poles reaches a specific value. The intensity of the glow is inversely proportional to the voltage between the two poles.When the test pen's tip touches a charged body with a voltage higher than the neon bulb's glow voltage and the other end of the pen is grounded through the body, the test pen will begin to glow. In order to prevent harm, the resistance in the test pen limits the current that can pass into the body.
2. It can be used to determine whether any wires in the line are in phase or out of phase using low-voltage nuclear phase monitoring. The precise procedure is to hold a test pen while standing on anything shielded from the earth, test the two wires, and then repeat. The two wires are different if either of the two test pencils glows brightly. Instead, it is in the same phase, which is determined by the luminous intensity of the neon bulb in the test pen and the voltage differential between its two poles.
3. It can be used to differentiate between direct current and alternating current. When using a test pen, alternating current is present if both poles of the neon bulb glow; if only one of the two poles glows, direct current is present.
4. It is capable of evaluating the positive and negative direct current poles. The neon bulb that glows should be connected to the test pen, and the non-lighting pole should be connected to the DC circuit to be tested.
5. You can use it to determine if the DC is grounded. You can stand on the ground and use a test pen to contact the positive or negative pole of a DC system that is isolated from the ground. The presence of a grounding phenomena indicates a bright neon bulb, and the presence of light at the tip of the pen indicates that the positive electrode is grounded. The negative ground is present if it glows on the finger end. But it must be noted that this method can be used to determine whether the DC system is grounded in DC systems with grounding monitoring relays.
