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car voltage gauge vdo
Automotive circuits generally use DC voltage . When measuring DC voltage , the multimeter should be adjusted to the DC 20 V or 200 V gear , and the multimeter should be connected in parallel with the circuit under test. By detecting the voltage , we can judge whether the circuit is normal . Most cars use 12V or 24V DC power supply. When testing the circuit , the voltage measured by the battery voltmeter is 12V , that is , maintaining the voltage indicates that the tested circuit is normal . When the switch is off, the voltage measured by the voltmeter connected in parallel with the bulb is zero volts. When the switch is closed, the voltage measured by the voltmeter connected in parallel with the bulb is also 12 volts , indicating that the control circuit is normal , otherwise it indicates that the circuit is faulty .
Can the car voltmeter gauge vdo be connected to the car generator ? Not necessarily . First understand whether the electricity generated by the generator of the vehicle is AC or DC . Even if the electricity generated is DC , it must be connected to the voltmeter after stabilizing the car voltage gauge so as not to damage the car voltmeter gauge vdo. If the electricity generated is AC , directly connecting the voltmeter to the generator without rectification will also damage the voltmeter It can be connected . The generator can generate electricity normally. But there is a problem with this connection. The regulator is not controlled by the ignition switch . The magnetic field winding of the generator also has current when the ignition switch is turned off. If the car is not used for two days in a row , I'm afraid the battery will leak out . It is suggested to change the circuit so that the B + of the regulator will not be powered until the ignition is turned on , or there should be a main power switch on the vehicle.
What is the range of the automobile voltmeter? Are 12V and 24V universal ? The installation size is the same , 24V can replace 12V . However , 12V cannot replace 24V , otherwise the meter will be broken.
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