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Product features ● Adopt high quality insulating resin, good flame retardant. ● Induction contact after quenching treatment, high hardness. ● Powerful flip crocodile clip maximum opening 12mm. ● Economic and practical, high stability. ● Full PU spring line, quick spring back after use. Directions for use Yinte auto measuring pen is designed for detecting low voltage circuit faults of transportation machinery. It can be used in the maintenance of automobiles, motorcycles, bulldozers, road rollers, excavators, and other transportation machinery. Voltage measurement range: 6V-12V-24V 1. Insert the banana plug at one end of the measuring wire into the metal cap on the top of the measuring pen to ensure good contact. 2. Clamp the alligator clip on the other end of the measuring wire to the ground (such as the metal shell of a car). 3. Tie the needle head of the measuring pen into the insulation layer of the conductor to be measured. 4. If the luminescent tube in the penholder of the measuring pen will be bright, it indicates that the measured point has formed a back (through) road and works normally. Otherwise, there is a fault at the measured point, which needs to be eliminated. Points for attention: 1. It is forbidden to use the electric pen beyond the range of this test. 2. The different measured voltage will cause the different brightness and darkness of the luminescent tube, which is a normal phenomenon. 3. The tip of the measuring pen is sharp. Please use it carefully and keep it away from children.

Product features ● Adopt high quality insulating resin, good flame retardant. ● Super elastic measuring line, the length of 3.5 meters. ● LED light display, easy to observe. ● Induction contact after quenching treatment, high hardness. ● Crocodile clip maximum opening 8mm. ● Economic and practical, high stability. Directions for use Yinte auto measuring pen is designed for detecting low voltage circuit faults of transportation machinery. It can be used in the maintenance of automobiles, motorcycles, bulldozers, road rollers, excavators, and other transportation machinery. Voltage measurement range: 6V-12V-24V 1. Insert the banana plug at one end of the measuring wire into the metal cap on the top of the measuring pen to ensure good contact. 2. Clamp the alligator clip on the other end of the measuring wire to the ground (such as the metal shell of a car). 3. Tie the needle head of the measuring pen into the insulation layer of the conductor to be measured. 4. If the luminescent tube in the penholder of the measuring pen will be bright, it indicates that the measured point has formed a back (through) road and works normally. Otherwise, there is a fault at the measured point, which needs to be eliminated. Points for attention: 1. It is forbidden to use the electric pen beyond the range of this test. 2. The different measured voltage will cause the different brightness and darkness of the luminescent tube, which is a normal phenomenon. 3. The tip of the measuring pen is sharp. Please use it carefully and keep it away from children.

Product features The 4000 Counts reading is more extensive. Large screen LED, white backlight more clear. Built-in chip, automatic shutdown in 15 minutes. Built-in NCV test function, more convenient detection. Double color adhesive, feel comfortable. Intelligent package chip. Turntable fonts never wear out. Can measure AC and DC voltage and current, resistance, on-off, diode, temperature, NCV. Directions for use This product is 4000 words display automatic range digital multimeter. The meter is battery-operated. Please check the shell before using the product. Check for cracks or plastic defects. Check the insulators near the input ports carefully. Dc/AC voltage detection The picture The picture The rotary switch is placed in the V position to test the DC and AC voltages. Resistance testing The picture Place the rotary switch in ω position for resistance measurement. Detection of diode The picture Place the rotary switch in the diode/buzzer position for diode measurement. Buzzer detection The picture Place the rotary switch in the diode/buzzer position for on-off measurement. NCV tests The picture Turn the knob to the NCV range to enter the NCV measurement mode.

Product features 2000 Counts readings are more extensive. Large screen LED, white backlight more clear. Built-in chip, automatic shutdown in 15 minutes. Built-in NCV test function, more convenient detection. Double color adhesive, feel comfortable. Intelligent package chip. Turntable fonts never wear out. Can measure AC and DC voltage and current, resistance, on-off, diode, NCV. Directions for use This product is 2000 words display manual range digital multimeter. The meter is battery-operated. Please check the shell before using the product. Check for cracks or plastic defects. Check the insulators near the input ports carefully. Dc/AC voltage detection The picture The picture The rotary switch is placed in the V position to test the DC and AC voltages. Resistance testing The picture Place the rotary switch in ω position for resistance measurement. Detection of diode The picture Place the rotary switch in the diode/buzzer position for diode measurement. Buzzer detection The picture Place the rotary switch in the diode/buzzer position for on-off measurement. NCV tests The picture Turn the knob to the NCV range to enter the NCV measurement mode.

Product features The head of the batch is made of imported CR-V chromium vanadium steel, which is strong and durable. Acrylic crystal handle, comfortable grip. Neon lamp service life up to 30,000 times. The head can be changed, one character cross can be changed at will, with locking. Large torque, the same specifications as the screwdriver. Pure copper contact parts. Directions for use This test pen is suitable for direct measurement of 100-250V AC circuit, electrical equipment, etc., suitable for electrical workers and families. 1. Please confirm whether the product has good performance before use. 2. Use within the allowed measurement range. 3. Hold the insulated part of the product with your hand, touch the extreme screw with one finger, and contact the circuit under test with the chisel head. Observe whether the neon lamp is glowing or not, and distinguish the live line from the null line. 4, the use of metal contact is strictly prohibited.

Product features ● With measuring pen function (low, middle and high gear for different places). ● Type-C charging, to solve the trouble of battery replacement. ● Digital and analog dual screen display, easy to observe. ● Automatic shutdown function (3 minutes), more power saving. ● Backlight lighting function, the use of a richer environment. ● Can measure AC and DC voltage, frequency, capacitance, resistance, on-off, diode, room temperature, NCV. Directions for use Special care should be taken when using this meter. Improper use may cause electric shock or damage to the meter. In use, the usual safety procedures should be followed and the safety measures specified in the user manual should be fully complied with. In order to make full use of the function of the instrument and ensure safe operation, please read and follow the instructions carefully. Follow the safety operation guide to ensure safe use of the instrument. Properly used and protected, meters will give you satisfactory service. 1. When using the meter, the user must follow the standard safety rules: · Universal protection against electric shock · Prevent misuse of meters 2. After receiving the instrument, check whether it is damaged during transportation. 3. After storage and shipment under poor condition, check and confirm whether the instrument is damaged. 4. The pen must be in good condition. Before use, check whether the pen insulation damage, wire wire is bare. 1. When used, the correct function and range must be used. 2. Do not measure in excess of the indicated value of the protection range of each range. 3. Do not touch the top of the pen (metal part) when the meter is connected to the measuring circuit. 4. When measuring, if the measured voltage is higher than 60V DC or 30V AC (effective value), keep your finger behind the stylus finger guard. 5. If the terminal voltage exceeds 400VDC or 400VAC, do not measure the voltage. 6. Do not measure the resistance, line on and off, and capacitor gear. 7. In the resistance and line on-off test range, be careful to avoid connecting the meter to the voltage source. 8. Do not use this meter near explosive gas, steam or dust. 9. If you notice any abnormality or malfunction of the instrument, stop using it. 10. The meter should not be used unless the bottom case is fully fastened in place. 11. Do not store or use the meter in direct sunlight, high temperature, high humidity. Usage Function Description 1. Ac/DC voltage/frequency/resistance/connectivity test 1.1 Connect the meter pen to the input port of the meter and press the POWER/SEL key to start the meter. The meter displays the working state in AUTO mode. 1.2 Connect the pen meter in parallel to the circuit, power supply and resistance meter under test to automatically identify AC voltage, DC voltage and resistance, and automatically display the frequency value of AC signal. 1.3 When the measured resistance is less than 50 ohms, the built-in buzzer sounds. 1.4 Read the measurement results from the display screen and view the dynamic changes of the values through the simulation bar. Warning: ● Do not input voltage higher than 400V, show higher voltage values are possible but possible There is a risk of damaging the meter. ● Take extra care when measuring high voltages to avoid electric shock. ● Disconnect the pen from the circuit under test after completing all measurement operations. Dc voltage detection The picture Ac voltage frequency detection The picture Resistance testing The picture Detection of connectivity The picture 2. Diode detection, capacitance detection, connectivity detection 2.1 Connect the meter pen to the input port of the meter, and press the POWER/SEL key to start the device. 2.2 Press the POWER/SEL key to switch to the connectivity check. ● Built-in buzzer sounds when the measured resistance is less than 50 ω. 2.3 Press the POWER/SEL key to switch to diode detection. 2.4 ● Forward measurement: the red test bar is connected to the positive pole of the tested diode, the black test bar is connected to the negative pole of the tested diode, which shows the approximation of the forward voltage drop of the diode; ● Reverse measurement: the red test bar is connected to the negative pole of the diode under test, the black test bar is connected to the positive pole of the diode under test, which shows "OL"; ● A complete diode test includes forward and reverse measurements. If the measurement results do not match the above, the diode is broken. 2.5 Press the POWER/SEL key again to switch to the capacitor detection. ● Connect the two test rods to the measured capacitance, and display the measured capacitance value on the LCD screen. ● When measuring the capacitance, it is necessary to confirm that all the power supplies of the circuit under test have been turned off and all the capacitors have been completely discharged. The capacitance on line can not be measured. Detection of connectivity The picture Detection of diode The picture Capacitance detection The picture 3. Determine the zero live line of the socket and test the live body of the wall 3.1 Press the POWER/SEL key. 3.2 When the non-contact voltage sensing area of the instrument is close to the live line of AC voltage (less than 5mm), the arc type light bar on the instrument screen will light up. The closer the arc type light bar is to the live line of AC voltage, the higher the value of the arc type light bar will be, and the buzzer will emit a higher frequency alarm sound. 3.3 Press the NCV button to switch to the high-sensitivity mode test, which can detect 30-1000V live wires. The closer the AC voltage is to the fire line, the higher the value of the arc lamp, the higher t

The origin of electricity As we all know, Edison invented the tungsten light bulb, which extended the time of light bulb, so who invented electricity? Between 1749 and 1751, Benjamin Franklin carefully observed and studied the formation of thunder, lightning, and clouds, and hypothesized that lightning in clouds and friction produced the same electrical properties. In 1752, he made a world-shaking experiment with electric kites in Philadelphia: under the condition of lightning, the kite collected atmospheric electricity into a Leiden bottle to charge it, thus proving his assumption of "the identity of lightning and static electricity". Franklin's contribution to physics was mainly in the field of electricity. He unified the chaotic knowledge of electricity at that time and systematically expounded the theories explaining various electrical phenomena (such as the generation of charge, the transfer of charge, electrostatic induction, etc.). He made remarkable achievements in the exploration of "electricity". In order to explore the law of electric motion in depth, many special terms such as positive charge, negative charge, conductive body, battery, charge, discharge and so on have become universal words in the world. Due to the invention of electricity, there have been many casualties and accidents, so our company has invented intelligent communication products between people and electricity again and again, so that more people can avoid the harm caused by electricity, YINTE - synonymous with safety is our constant mission. A simple understanding of the origin of "electricity", then let me give you a brief introduction to our company once again to create the design of multi-functional replaceable head digital display measuring pen, there are also a lot of innovative functions oh! Product introduction YT - 0505 | multi-function removable nipple digital display test pencil Multi-function digital display measuring pen, innovative design, using a word, cross CR-V steel forging batch head, flexible replacement, higher hardness, greater torque. It can directly detect the ac and dc voltages from 12v to 250v, detect breakpoints, and measure the on-off of uncharged conductors, meeting the requirements of complex power operations. Product parameters Specification: 3.5 x150mm Measurement range: AC.DC 12-250V G: 37 g The video details Product features The picture The head can be changed, one character cross can be changed at will, with locking. Large torque, the same specifications as the screwdriver. ◆ ◆ ◆ ◆ ◆ ◆ LED lighting, can also be used normally in dark environment. Built-in chip, automatic shutdown within three minutes, to prevent forgetting to turn off the light and causing battery depletion. ◆ ◆ ◆ ◆ ◆ ◆ Type-c charging solves the trouble of battery replacement. ◆ ◆ ◆ ◆ ◆ ◆ Large-screen backlit display for easy viewing, 100% larger than conventional display

Auto test pen, also called auto test pen, test light in jargon, is a circuit testing tool commonly used by auto electricians in automotive electrical equipment installation, circuit modification and maintenance activities. It is used to detect whether the measured point in the car circuit is electric, accurate measurement also needs to use a multimeter. The working principle of a car measuring electric pen ● When the nib and clip of the automobile measuring pen are connected with the positive electrode of DC12V at one end and the negative electrode of DC12V at the other end, the indicator light will be on. ● If the light bulb as the indicator, the car test pen in use when there is no positive and negative points, as long as there is 12V voltage between the nib and the clip, the bulb will be bright. ● If the light emitting diode as the indicator light, because the rated voltage of the light emitting diode is low, must be used in series resistance. If there are two light-emitting diodes in reverse parallel, there is no positive or negative polarity in the use of the automobile measuring pen. If there is only one light-emitting diode, the car test pen in use when there is a positive and negative polarity, the reverse use of light-emitting diode is not bright. The use and experience of automobile electric test pen 1. A few industry terms first: DC12V positive terminal, called fire line; The car test pen clamp to the metal frame, called the iron; The clip of the car measuring pen is clamped to the DC12V positive terminal, which is called the fire line. 2. The metal frame of most vehicles is connected with the negative electrode of the battery. When this kind of vehicle is tested with iron, if the measured point has electricity, the indicator light will be on. The metal frame of a small number of vehicles is connected with the positive electrode of the battery. When this kind of vehicle is tested with iron, if the measured point is conduction with the negative electrode, the indicator light will be on. The specific circuit test method should be selected in combination with the automobile circuit. 3. If the exposed metal tip of the automobile measuring pen is too long, it can be wrapped with electrical tape to avoid touching other circuits during the test, causing test errors or short circuit faults. 4. When testing, try to use the nib to measure the joint. If you need to find the line, you can connect a small wallpaper knife on the tip of the pen, and use the blade to gently cut the wire skin and connect it to the metal wire for measurement. After the measurement is completed, be sure to wrap electrical tape around the wire break. 5. Because the automobile measuring electropen can only be used to measure the automobile power system and electrical control system, can not be used to measure the electronic control system, so it is particularly important to make a correct judgment on the function of the wire. These two systems can be distinguished in several ways. Wire thickness: Electrical control system wire is very thin. Classification of vehicles: American and German cars adopt more electronic control systems. The price of the vehicle: The higher the price of the car, the more electronic control systems are used. 6. Order of measurement: No power. ACC, ON, start. No power: live wire; ACC: ACC line; ON: oil pump line, turn signal, brake light, ceiling light, central lock, horn; Start: Start line.

Multimeter is also known as multiplexing table, multi-purpose table, three-purpose table, complex table, etc., is an indispensable measuring instrument in power electronics and other departments, generally to measure voltage, current and resistance as the main purpose. Multimeters are classified into pointer multimeters and digital multimeters by display mode. Is a kind of multi-functional, multi-range measuring instrument, general multimeter can measure DC current, DC voltage, AC current, AC voltage, resistance and audio electrical equality, some can also measure AC current, capacitance, inductance and some parameters of the semiconductor (such as β). 01 The universal The basic function The multimeter can be used to measure not only the resistance of the measured object, but also the AC and DC voltage. Even some multimeters can also measure the main parameters of the transistor and capacitor capacitance. Fully proficient in the use of multimeter is one of the most basic skills of electronic technology. The measurement value of the digital multimeter is displayed by the LCD directly in the form of digital, easy to read, and some also have voice prompt function. Multimeter is a common meter head, set voltmeter, ammeter and ohm meter in one meter. The DC current range of the multimeter is a multi - range DC voltmeter. The meter head in parallel closed circuit voltage divider can expand its voltage range. The DC voltage range of the multimeter is a multi - range DC voltmeter. The series voltage divider of the meter head can expand its voltage range. Different partial voltage resistance, the corresponding range is also different. The head of the multimeter is the magnetoelectric system measuring mechanism, it can only through DC, the use of diode will be AC into DC, so as to realize the measurement of alternating current.

The introduction of non-contact measuring electropen Non-contact measuring pen is an induction measuring pen without direct contact with the power supply, measuring pen with sound and light alarm, flashlight lighting and other functions, is a safe, convenient, simple operation of multifunctional measuring pen. Application range of non - contact measuring pen Non-contact measuring pen is widely used in home, industrial, electric power, factory, maintenance and other scenarios. Electricians, electronic hobbyists, ordinary users can use.

When using digital display measuring pen, the above two buttons, one is the direct measurement, one is the induction button. Use the thumb to hold down the button that measures directly (far away from the nib), with the metal tip touching the object to be measured. If it is to measure whether there is electricity inside the object or inside the wire, you should touch the button with your thumb (close to the pen tip). At this time, if there is a lightning symbol displayed, it means that the inside is charged, otherwise it is not charged. When using the two buttons do not press at the same time, so the measured results are not accurate, there is no reference significance.

Our life is basically inseparable from all kinds of electrical products, television, refrigerator, air conditioning washing machine and so on, these electrical appliances bring us a convenient life at the same time also brought danger, not careful may happen electric shock accident endanger our lives. So we can use a little tool called an electric pen to detect if there is electricity. How should the electric pen be used correctly? Let's look down here. Measuring pen is one of the tools often used by the majority of electricians to determine whether the object is charged. Its internal structure is a bulb with two electrodes. The bubble is filled with neon gas, commonly known as neon bubble. One pole of the bulb is connected to the nib, and the other pole is connected to the other end of the pen in series with a high resistance. When the voltage between the two poles of a neon bubble reaches a certain value, a glow is generated between the two poles, which is proportional to the voltage between the two poles. When the voltage of the charged body to earth is greater than the glow voltage at the beginning of the neon bubble, the tip of the measuring pen touches it, and the other end is grounded through the human body, so the measuring pen will emit light. The function of a resistor in a measuring pen is to limit the current flowing through the body to prevent danger. Use method of common measuring electropen P ART.01 If it is an ordinary measuring pencil, press the back end of the pencil cap with your index finger, then gently pinch the pencil with your thumb, middle finger, and ring finger. After holding the pencil steady, insert the metal nib into the socket hole. Check whether the neon tube in the middle of the pencil is glowing. Holding the pen correctly is very important: for a physical pen, hold the pen cap with your index finger, gently pinch the pen with your thumb, middle finger, and ring finger to keep it stable, and then insert the metal tip into the hole in the wall socket panel or the hole in the external socket bar. Check whether the neon tube in the middle of the test pen emits light. What emits light is charged. Generally used in the daytime or in a strong light place, the light of the test pen is not obvious. At this time, you can cover it with your hand and observe it carefully.