Cómo juzgar los tres cables de fuego , cero y tierra por digital multímetro
Cómo juzgar los tres cables de fuego , cero y tierra por digital multímetro
Insertar el negro test plomo de el digital multímetro en el "COM" agujero, el rojo test plomo into el "V/Ω" agujero, switch the gear to the maximum range of AC voltage, hold the tip of the black test lead with the left hand, and touch the tested circuit with the tip of the red test lead with the right hand (do not Touch the tip of the pen), at this time the mulmeter will display a certain voltage value, the judgment method is as follows:
El line with the highest displayed voltage value is the live wire, and the specific value is uncertain, generally tens to hundreds of volts. After the live wire is found, the remaining two wires are the neutral wire and the ground wire. Because there is a potential difference between the zero wire and the ground wire, there will a a small numerical display when measuring the neutral wire, and the mostrado valor es siempre cuando medir el suelo cable. Cero, so eso tú puede juzgar el cero línea y el suelo línea.
To sum up, according to the above method, we can easily identify the live wire and the neutral wire. Now there are still digital multímetros with the live wire identification function, that is, the HV live wire gear. The operation method is the same as above, and the one that displays HV is the live wire. , does not display HV's ie neutral or ground.
May I ask how to check the ignition coil on the car with a multímetro?
1. El multímetro puede sólo medir su on-off and resistencia valores for referencia. Sin embargo, most ignition coil fallas are inter-turn short circuits (high-voltage breakdown), which can can be mided with a multímetro. You can also use battery power to instantly connect the input terminal (primario), and the output terminal will have a high-voltage output output (secundario).
2. El multímetro puede medir la resistencia de la dos alta-tensión terminales, but it can juez la falla de la encendido bobina.
3. El voltaje valor entre los terminales de el independiente encendido bobina enchufe es diferente debido a el diferente bobinas, so it cannot be juzgado si el encendido bobina es bueno o malo.
4
1. Cualquier bobina tiene a secundaria bobina y a primaria bobina. La bobinas used on the distributor are all output by a high-voltage head, and then distributed to each cylinder.
