Several Measurements of Digital Display Electric Pen
1. Direct measurement method
The direct measurement method refers to the measurement method in which the probe of the electric test pen directly contacts the measured object to judge whether it is charged or not. When using the direct measurement method, touch the metal probe of the test pen to the object to be measured, and at the same time press and hold the DIRECT button. The value of the measured voltage. General test pen can display 12v, 36v, 55v, 110v and 220v. Under normal circumstances, the last displayed value on the display is the measured voltage value.
2. Induction measurement method
Inductive measurement method refers to the measurement method in which the probe of the test pen is close to but not in contact with the measured object, and the voltage induction is used to judge whether the measured object is charged.
If the wire is live, the display of the test pen will display the voltage symbol. If the disconnection indicator light in the middle of the wire is off, the voltage symbol disappears, indicating that there is a disconnection at the current location. The induction measurement method can find out the broken position of the insulated wire, and can also judge the live wire and the neutral wire of the insulated wire.
