A few common uses for a stylus.
1、Basic usage
The various functions of the electric stylus are inseparable from the correct method of use - for the electric pen, if used in the wrong way, there is even the danger of electrocution, so you must be careful.
Here is only the most common and inexpensive way to use the neon bubble stylus:
Hold the insulated part of the stylus between your thumb and middle, ring and little fingers (thumb on one side, the other three fingers on the other side), and touch the metal cap or metal clip on the top of the stylus with your index finger.
At the other end of the stylus, is a and a word change the same thing, this part can only be measured with the object in contact, never contact with the human body.
Measurement, with the above posture to hold the pen, with the above a word change cone part of the contact with the object being measured. At the same time, to ensure that part of the measurer's body in contact with the earth (standing directly on the ground can be, if wearing insulating rubber shoes or standing on a stool, you need to use the other hand to contact the wall).
2、Measuring voltage
Measuring voltage with a stylus is the most commonly used method for electric pens. However, it should be noted that the stylus can only measure the line with or without voltage, can not judge the circuit on or off or the size of the voltage (voltage is definitely through, but no voltage may not be a circuit breaker).
Measurement, with the stylus touching the line being measured, if the stylus lights up, proving that there is voltage in the line; conversely, there is no voltage.
Before measuring, we first need to know the purpose of their own measurements. For example, in single-phase circuits, the fire line normally has a voltage, and the zero line and ground line have no voltage. Therefore, under normal circumstances, the fire line can light up the pen, zero ground line can not be lit. But when we measure the zero-ground line can not light up the pen, does not mean that the zero-ground line is completely normal, need to carry out further testing.
3, distinguish between zero and ground
Distinguish between zero and ground, has always been a headache for many beginning electricians. But in fact, a stylus can solve this problem.
The method is as follows:
First of all, use an electric pen in front of a few wires to measure, only one wire can light up the pen, this line is the fire line.
Afterwards hold an electric pen in each of the right and left hands, the measurer standing on an insulated object, not in contact with the earth. Use one of the pens to make contact with the fire wire and the other to make contact with the wire to be measured. If at this time the two pens do not light up or the brightness is low, then the line to be measured is the ground line. If the two pens are normally lit at this time, the line to be tested for the zero line.
4, distinguish between AC and DC
Line is AC or DC? The same is an electric pen can be solved.
Method 1: There are at least two lines in the circuit, measured with a pen, if one of the two lines can light up the pen, the rest can not be lit, it proves that the circuit is alternating current. If two wires can light up the pen, the circuit is DC.
Method 2: When the circuit is AC, the pen is brighter. When there is DC current in the circuit, the brightness of the pen is low.
Method 3: Observe the luminous position of the pen. The same is to use the pen to contact the fire wire, if it is direct current, the neon bubble inside the pen only at one end of the light; if it is alternating current, the neon bubble of the pen will be the whole light up.
5, distinguish between positive and negative poles
By observing the position of the neon bubble light, but also be able to know the positive and negative poles of the DC power at the same time.
As mentioned above, DC, neon bulbs only glow at one end. If the neon bubble is glowing at one end of the tip of the pen, the measured position for the power supply positive pole; Conversely, the power supply negative pole.
In addition, some electricians say that the measurement of the two lines is the same, with two electric pens in each hand to take a simultaneous measurement of the two lines, bright one for the same item, are bright for the different items. Joint liaison and a few load lines of a device is particularly useful. I wonder if you guys have tried it?
