How to check whether the digital pen has power or not
The test pen with digital display can directly display the voltage during measurement, but this value is very inaccurate, and sometimes the error is quite large, so the displayed voltage number is for reference only, and there is no great significance for measuring voltage You should use a voltmeter or a multimeter, not a test pen; the method of using the digital display test pen is as follows: 1. First, perform a self-test, press and test directly. If the indicator light turns on, it means that the power of the test pen is enough to detect whether the circuit is connected or disconnected. If it is on, press the direct detection button, and then the tip of the tester touches the plug. If the light turns on, it means that the line is connected.
1 Familiar with the composition of the digital electric pen 1 Test head Quick test ACDC voltage AC voltage test range 70~250V DC voltage test range 12, 36, 55V 2LCD display panel LCD display, the reading is directly and clearly displayed 12, 36, 55, 250V 3 Inductive breakpoint Test button; 6V weak current test pen is used for testing electronic products. The general test voltage is 6v24v. The human body and the earth form a energized circuit, as long as there is a potential difference between the charged body and the earth.
Its measurement range is 12~220V, as long as the potential difference between the charged body and the earth exceeds a certain value, it will be displayed on the display of the 12V electric pen. That is to say, the electric pen with digital display can measure voltage, but the electric pen in the traditional sense , as long as it is still measuring the presence or absence of current, now it is just an additional real voltage; the digital electric pen has the function of measuring the voltage value, which is normally divided into 12, 36, 55, 110, 220. If only 12 is displayed, it means that the measured voltage is about About 12V, if all these numbers are displayed, take the maximum value on the far right, which is 220V, indicating that the measured voltage should be around 220V.
How to read the digital electroscope electroscope When the digital electric pen is testing AC, press the finger on the copper point that is directly detected. When measuring the live wire, it shows 12V36V55V110V220, which means the voltage is 220 volts, and 12V36V55V110 means the voltage is 110 volts, and it shows 12V36V55 When the voltage is 55 volts, the display is 12V36, indicating that the voltage is 36 volts; when the digital electric pen is testing the AC, press the finger on the copper point that is directly detected, and when measuring the live wire, the display is 12V36V55V110V220, which means the voltage is 220 volts, and the display is 12V36V55V110, which means the voltage is 110 volts is displayed as 12V36V55, which means the voltage is 55 volts, and 12V36 is displayed as 12V, which means the voltage is 36 volts.
There are low-voltage and high-voltage electric pens. Generally, low-voltage electric pens are sold on the market. They can only test voltages below 400V. The higher the bright voltage, the digital display has a string of numbers, and the last group of numbers is the measured voltage. I hope it can help; 1 can be used for low-voltage phase verification, and the specific method for measuring whether any wires in the line are in the same phase or out of phase is to stand On an object that is insulated from the ground, hold a testing pencil in each hand, and then test on the two wires to be tested. If the two testing pencils glow brightly, the two wires are different and opposite.
How to check whether the digital pen has power or not
4 If it is a digital test pen, it is divided into a direct measurement button and an inductive electric button. If you want to measure a contact object, use your thumb to lightly press the direct measurement button DIRECT5. Touch the sensor button INDUCTANCE lightly with your thumb, if the test lead shows.
