What is the lowest voltage that the electric pen can measure?
6V
Weak current testing pen: used for testing electronic products, the general test voltage is 6v-24v. For ease of use, the tail of the electric pen often has a lead wire with a clip.
When using a weak voltage test pen to test the electrified body, the current will form a energized circuit through the electrified body, the electric pen, the human body and the earth. As long as the potential difference between the electrified body and the earth exceeds 6V, the neon tube in the electric test pen will be under the action of the electric field. It will shine brightly.
The weak pressure test pen is usually made into two types: pen type and screwdriver type. The front end is a metal probe, and the rear plastic shell is equipped with neon bulbs, safety resistors and springs. The tail end has a metal end cap or a pen-shaped metal hanging nose. The parts that must be touched by hands when using.
Precautions for using electroscope
1. Before using the test pencil, first check whether there is a safety resistor in the test pencil, and then visually check whether the test pencil is damaged, whether it is damp or water, and can only be used after passing the inspection.
2. When using the test pen, do not touch the metal probe at the front end of the test pen with your hands. Doing so will cause personal electric shock accidents.
3. When using the test pen, be sure to touch the metal part at the end of the test pen with your hands. Otherwise, because the electrified body, the test pen, the human body and the earth do not form a circuit, the neon bulb in the test pen will not emit light, causing a misjudgment. The charged body is not charged, which is very dangerous.
4. Before measuring whether the electrical equipment is charged, first find a known power source to test whether the neon bulb of the test pen can emit light normally, and then it can be used.
5. When testing the charged body under bright light, special attention should be paid to whether the neon bulb is really glowing (or not). If necessary, you can use the other hand to block the light to judge carefully. Do not cause misjudgment, judge that the neon bulb glows as not glowing, and judges that there is electricity as no electricity.
