How to use the digital voltage tester, how to use the digital display voltage tester?

A key) direct, directly measure the button (far away from the LCD screen), that is, when you use the bit to directly contact the line, please press this button;

B key) inductance, inductive measurement button (close to the LCD screen), that is, when using the bit bit to sense the contact line, please press this button.

Note: No matter how the words are printed on the electric pen, please identify the one far away from the LCD screen as a direct measurement; The one closer to the liquid crystal is the induction key!

2. This voltage tester is suitable for direct detection of AC and DC power of 12-250V and indirect detection of neutral line, phase line and break point of AC power. It is also possible to measure the on/off of uncharged conductors. a.The last digit is the measured voltage value;

b.When the display value of high break is less than 70%, the low break value is displayed;

c.When measuring direct current, touch the other pole with your hand; When you hold down the B button and move it longitudinally along the wire, there is no display in the display window, which is the breakpoint.

The new shape digital display voltage tester can test 12V, 36V, 55V, 110V and 220V, generally according to the test pen above the point is the voltage measurement, with the highest display as the test voltage value at that time; Below is the inductive test to detect the broken circuit of the insulator line, which is based on experience. The button does not need to be pressed hard, and the two test buttons cannot be touched at the same time during the test, otherwise the sensitivity and test results will be affected.

Touch direct with one finger to directly test the wire voltage with the tip of an electric pen, while the display window displays the corresponding voltage value;

Touch the inducton with one finger to test the power supply with the tip of the pen and the outer sheath of the cable, and display the voltage value or voltage symbol in the display window

Digital pen. Here's how to use it:

1. It can be used for low-voltage nuclear phase to measure whether any wire in the line is in phase or out of phase. The specific method is: standing on an object insulated from the earth, holding a voltage tester in each hand, and then testing on the two wires to be measured, if the two voltage testers are very bright, the two wires are out of phase;

On the contrary, it is in-phase, which is judged by the principle that the voltage difference between the two poles of the neon bubble in the voltage tester is proportional to its luminous intensity.

2. It can be used to distinguish alternating current.

and direct current. When testing with a voltage tester, if both poles in the neon bubble of the voltage tester emit light, it is alternating current; If only one of the two poles emits light, it is direct current.

3. The positive and negative poles of direct current can be judged. The voltage tester is connected to the DC circuit for testing, and the pole where the neon bubble shines is the negative pole, and the pole that does not shine is the positive pole.

4. It can be used to judge whether DC is grounded. In the DC system with ground insulation, you can stand on the ground and use the voltage tester to contact the positive or negative electrode in the DC system, if the neon bubble of the voltage tester is not bright, there is no grounding phenomenon.

5. If the neon bubble is shiny, it means that there is a grounding phenomenon, and if it shines like the tip of the pen, it means that the positive electrode is grounded. If it shines on the finger end, the negative electrode is grounded. However, it must be pointed out that in a DC system with a grounding monitoring relay, this method cannot be used to determine whether the DC system is grounded.

The digital pen has the function of measuring the opening value of the voltage number, which is normally divided into 12 36 55 110 220 gears.

If only 12 is displayed, it means that the measured voltage is about 12V, and if all these numbers are displayed, the maximum value on the far right is 220V, indicating that the measured voltage should be about 220V.

The digital display voltage tester pen body has an LCD display, which can intuitively read the test voltage number. When measuring the fire wire, there is a voltage between the lighting circuit and the ground U=220V, and the resistance of the human body is as small as a few hundred to thousands of ohms.

The resistance inside the voltage tester is usually about a few trillion ohms, and the current through the voltage tester (that is, the current through the human body) is very small, usually less than 1 milliampere, when such a small current passes through the human body, there is no harm to people, and when such a small current passes through the neon bubble of the voltage tester, the neon bubble will glow.

It is a new digital display tester, which can test 12v 24v 36v 110v and 220v, generally according to the test pen above the point is the voltage test, with the highest display as the test voltage value at that time; Below is the inductive test to detect the broken circuit of the insulator line, which is based on experience.

It is a new digital display tester, which can test 12v 24v 36v 110v and 220v, generally according to the test pen above the point is the voltage test, with the highest display as the test voltage value at that time; Below is the inductive test to detect the broken circuit of the insulator line, which is based on experience.