How to use the electric stylus and its purpose
The stylus is also called a test pen, or "electric pen" for short. Is a basic electrician's tool, mainly used to test whether the wire is charged. There is a neon bubble in the body of the pen, the test if the neon bubble glows, indicating that the wire has electricity or access to the firewire. Test pen in the pen tip, pen tail, made of metal materials, the pen rod is made of insulating materials. And novice use of the test pen, be sure to use your hand to touch the end of the metal part of the test pen, otherwise, due to the charged body, the test pen, the human body and the earth does not form a circuit, the test pen in the neon bubble will not glow, resulting in a miscarriage of justice, that the charged body is not electrically charged, so today we will talk about how to use a test pen and the precautions to be taken.
Voltage detection
1, the detection range of 12V-250V AC / DC power.
2, touch the "direct detection" button, the metal front end of the stylus contact with the measured object, the stylus is divided into 12V, 36V, 55, 110, 220 five-segment voltage value, the last value of the LCD screen for the measured voltage value (not to the 70% of the value of the high section display shows the value of the low section).
3, the measurement of non-ground DC, the hand should touch the other electrode.
Induction detection
1, touch the "induction, breakpoint test" key, the metal front of the stylus close to the object to be measured, if the display appears "" symbols, indicating that the object with alternating current.
2, the measurement of disconnected wires, touch the "Induction, breakpoint test" key, the metal front end of the stylus near the wire insulation layer, "" symbols appear, indicating that the point being measured with alternating current; such as the phenomenon of disconnected wires, the broken point at the "" symbol disappears. "" symbol disappears.
3, the use of this function can be convenient to distinguish between zero, phase line (measured side-by-side lines to increase the distance between the lines), detection of microwave radiation and leakage conditions.
4、With LED light, it has night vision function.
Application Demonstration
Line break test: red light indicates that the line is smooth and normal, there is no line break phenomenon; red light does not indicate that the line is disconnected somewhere, not connected.
Detecting DC power: Blue light indicates that the battery is fully charged; light tone or no light indicates that the battery is insufficient or dead.
Line breakpoint detection: hand press and hold the induction breakpoint detection key, electric pen tip near the wire will appear charged symbols, move the tip along the wire, if the charged symbols disappeared, that is, that is, the power failure, this feature is loved by electricians.
The use of the stylus
In addition to determining whether the object is charged, the stylus has the following uses:
(1) can be used for low-voltage phase verification, measuring the line between any conductors whether the same phase or different phase. Specific method is: stand on an object insulated from the earth, hands each holding a stylus, and then in the two wires to be tested on the test, if the two stylus luminous is very bright, the two wires for the phase; Conversely, it is the same phase, it is the use of neon bubbles in the stylus the difference in voltage between the poles of the neon bubble and its luminous strength is directly proportional to the principle of discrimination.
(2) can be used to distinguish between alternating current and direct current. In the test with the stylus, if the stylus neon bubble in the two poles are luminous, is the alternating current; if the two poles in only one pole luminous, is the direct current.
(3) can determine the positive and negative poles of DC. Will be connected to the stylus in the DC circuit test, neon bubble light that pole is the negative pole, does not light a pole is positive.
(4) can be used to determine whether the DC ground. Insulated to ground in the DC system, can stand on the ground with a stylus contact DC system in the positive or negative pole, if the stylus neon bubble does not light up, there is no grounding phenomenon. If the neon bubble is bright, it shows that there is a grounding phenomenon, and its bright such as the tip of the pen, then the positive pole is grounded. If the light is at the end of the finger, it is negative grounding. However, it must be pointed out that in the DC system with a ground monitoring relay, this method can not be used to determine whether the DC system is grounded.
