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MultimeterHere's how to use it:
Tools Raw materials: multimeter.
1. Turn on the multimeter and turn it on to zero.
2. Select the mode of the multimeter according to the demand, and usually adjust it to the voltage mode.
3. After adjustment, you can use the two pens on the multimeter to connect the items that need to be measured, and then you can see the voltage on the multimeter.
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Here's how to use a multimeter:Tools: multimeter, electric rod.
1. The switch in the middle of the multimeter, twist the switch in the counterclockwise direction, and twist it once to come to the mode of AC voltage.
2. Screw it again to come to the DC voltage mode, select the voltage you want to test, and turn on the switch next to it.
3. Insert the second jack below into the fourth jack, and then touch the electric rod to the positive and negative poles of the electricity, so that the multimeter can test the voltage.
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Place one transfer switch of the universal meter in the AC and DC voltage block, and the other transfer switch in the appropriate range of the AC voltage, and the two meter pens of the universal meter can be connected in parallel with the circuit or load under test.
One of the most critical steps in using a multimeter is to turn the dial and select the appropriate range. The dial of a multimeter is generally divided into two circles, the inner ring is marked with the exact range, and the outer ring is marked with the measurement gear. When turning the dial, you need to select the measuring gear first.
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How to use the multimeter:1Insert the probe of the multimeter into the circuit, and connect the red of the probe to ground, the black to the power supply, and the green to the signal cable.
2.Adjust the setting of the multimeter, adjust the mode of the multimeter to the voltage measurement mode, adjust the range to the maximum value, adjust the gear to Connect the probe of the multimeter to the circuit, observe the display screen of the multimeter, and record the voltage value in the circuit. 4.
Adjust the mode of the multimeter to the current measurement mode, adjust the range to the maximum value, adjust the gear to Connect the probe of the multimeter to the circuit, observe the display screen of the multimeter, and record the current value in the circuit. 6.Adjust the mode of the multimeter to the resistance measurement mode, the range to the maximum, and the gear to 20k.
7.Connect the probe of the multimeter to the circuit, observe the display of the multimeter, and record the resistance value in the circuit.
How to use the multimeter
How to use the multimeter:1Insert the probe of the multimeter into the circuit, and connect the red of the probe to ground, the black to the power supply, and the green to the signal cable.
2.Adjust the setting of the multimeter, adjust the mode of the multimeter to the voltage measurement mode, adjust the range to the maximum value, adjust the gear to Connect the probe of the multimeter to the circuit, observe the display screen of the multimeter, and record the voltage value in the circuit. 4.
Adjust the mode of the multimeter to the current measurement mode, adjust the range to the maximum value, adjust the gear to Connect the probe of the multimeter to the circuit, observe the display screen of the multimeter, and record the current value in the circuit. 6.Adjust the mode of the multimeter to the resistance measurement mode, the range to the maximum, and the gear to 20k.
7.Connect the probe of the multimeter to the circuit, observe the display of the multimeter, and record the resistance value in the circuit.
Benefits of multimeter: 1. It can measure electrical parameters such as voltage, current, resistance, capacitance, transformer, etc.; 2. It can measure the parameters of electronic components, such as transistors, integrated circuits, potentiometers, switches, etc.; 3. It can measure the parameters of the electronic system, such as frequency, resonance, filtering, etc.; 4. It can measure the functions of electronic systems, such as input and output characteristics, delay time, noise, etc.; 5. It can measure the stability of electronic systems, such as temperature stability, humidity stability, etc.; 6. It can measure the reliability of electronic systems, such as voltage resistance, vibration resistance, heat resistance, etc.; 7. It can measure the safety of electronic systems, such as insulation, anti-interference, etc.; 8. It can measure the availability of electronic systems, such as reliability, maintainability, etc.
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Summary. Dear, glad to answer for you! How to use the multimeter is 1. We must first understand the meaning of each symbol and knob on the dial of the multimeter, as well as the role of its selection switch.
For example, the multimeter MV is the meaning of AC and DC millivolt voltage, and V is the meaning of AC voltage and V- is the meaning of DC voltage. 2. We need to adjust the measured multimeter to the mechanical zeroing state. 3. Then we need to observe the relevant type and size of the object to be measured, and then select the transfer switch and the appropriate range on the multimeter.
Dear, I'm glad to answer for you! How to use the multimeter is 1. We must first understand the meaning of each symbol and knob on the dial of the multimeter, as well as the role of its selection switch. For example, the multimeter MV is the meaning of AC and DC millivolt voltage, and V is the meaning of AC voltage and V- is the meaning of DC voltage.
2. We need to adjust the measured multimeter to the state of mechanical zeroing and guessing hunger. 3. Then we need to observe the relevant type and size of the object to be measured, and then select the transfer switch and Suiyu appropriate range on the multimeter.
4. After selecting the range, we need to find the scale mark that we want to measure and find the correct place for the pen jack. 5. When measuring voltage, it should be noted that the pen of the multimeter should not be reversed, otherwise the pants will be prone to bend the needle in the table, because the reverse connection will cause the deflection error of the needle in the opposite direction. 6. When measuring the current, it is necessary to pay attention to the transfer switch to the DC current gear with the random call, and at the same time pay attention to adjust it to the appropriate range of range.
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Summary. Dear, hello, I am glad to answer for you, I have inquired for you: first select the range of the multimeter to the area you want to measure, and give priority to the larger range.
For resistance measurement, insert a red pen into a multimeter with a socket with a resistor symbol, and a black pen into a jack with the word com. Connect the red and black pen to measure the internal resistance of the multimeter, the value that appears on the multimeter is the internal resistance, and then connect the multimeter with the measured object, the red pen is connected to the left, and the black pen is connected to the right. The resistance of the object will be displayed on the screen, and the internal resistance will be subtracted from the value displayed on the multimeter, which is the resistance of the object itself.
Dear, hello, I am glad to answer for you, I have inquired for you: first select the range of the multimeter to the area you want to measure, and give priority to the larger range. For resistance measurement, insert a red pen into a multimeter with a socket with a resistor symbol, and a black pen into a jack with the word com.
Connect the red and black pen to measure the internal resistance of the multimeter, the value that appears on the multimeter is the internal resistance, and then connect the multimeter with the measured object, the red pen is connected to the left, and the black pen is connected to the right. The resistance of the object will be displayed on the screen, and the internal resistance will be subtracted from the value displayed on the multimeter, which is the resistance of the object itself.
Dear, hello, in the process of using the multimeter for measurement, we can not directly touch the metal part of the red and black watch pen with our hands, because touching the watch pen with our hands may make the multimeter measurement results inaccurate, and there is also a certain guarantee for human safety. In the process of using the multimeter for measurement, can not be arbitrarily shifted to the operation, when we are using the multimeter to measure some higher voltage or larger current equipment, shift at will, it is likely to cause damage to the multimeter, if you want to shift the operation, you need to disconnect the meter pen first, and then carry out the shift operation, after completing the shift can be measured. When we finish using the multimeter, we need to adjust the gear of the multimeter to the voltage level of the highest position, so that when we use the multimeter again, the multimeter will not be damaged, and finally the power of the multimeter needs to be turned off.
The bad part is the transformer, the transformer in the circuit can be used for the audio output transformer for transistor radio, the secondary is used as the primary of the step-up transformer, the tap in the middle of the primary is not used, and the taps at both ends are used as the secondary of the step-up transformer. If you can't find a suitable transformer, you can also use the silicon steel sheet of the radio output transformer to make your own, and use a high-strength enameled wire with a diameter of 0 25mm for 110 turns for the primary stage, and a high-strength enameled wire with a diameter of 0 21mm for 520 turns for the secondary. A layer of insulating paper should be added between the primary stages, and attention should be paid to the eponymous end of the primary stage coil. >>>More
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