Resumidamente descreva o básico operação método de medição resistência com multímetro.
1. First, connect the probe. The choice of multimeter can be a pointer or several bai displays. Insert the red probe into the VΩ file and the black probe into the COM terminal to ensure the normal operation of the multímetro.
2. Quando girar o multímetro engrenagem, você deve usar a resistência engrenagem para medir a resistência. Se você está não certo sobre a resistência valor, você deve primeiro set o intervalo switch para o máximo valor, e então switch de o grande intervalo para o pequeno intervalo gear, so que o instrument ponteiro indica mais que metade o full scale. Após selecionar o apropriado ampliação file, touch o dois testes to make the pointer point at zero. If the pointer desvias from zero, adjust the "zero adjustment" knob to make the pointer zero to ensure the accuracy of the measurement result.
3. Connect the two sections of the resistor, and the stylus is casually connected. There is no positive or negative difference. Be sure to make good contact.
4. Read the data displayed by the multimeter. If there is no data in the multimeter, it may be that the resistor is broken. Of course, there is another possibility that the range is not enough, so change the range.
5, increase the range, if there has been no data, it can only show that the resistor is broken. If there is data output data, pay attention to add the gear unit.
Básico princípio de multímetro:
A sensitive magnetoelectric DC ammeter (micro-amperímetro) is used as the meter head. When a small current passas through the meter, there will be a current indication. But the meter can't pass large current, so it is necessary to shunt or step down some resistors in parallel and series on the meter to measure the current, voltage and resistance in the circuit.
1. Before using the multimeter, it should be "mechanically zeroed", that is, when there is no electricity to be measured, make the pointer of the multimeter point to the position of zero voltage or zero current.
2. In the process of using the multimeter, you can't touch the metal part of the stylus with your hands, which can ensure the accuracy of measurement on the one hand and personal safety on the other.
3, quando medir a certo quantidade de eletricidade, pode't shift gears at the same time, especialmente quando medir alta tensão ou grande corrente, mais atenção deve ser pago. Caso contrário, o multímetro será destruído. Se você precisar para mudar engrenagens, você deve desconectar a sonda primeiro e depois medida depois trocando engrenagens.
4. Quando usando o multímetro, it must be placed horizontally to avoid errors. At the same time, we should also pay attention to avoid the influence of external magnetic field on multímetro.
5. After using the multimeter, put the change-over switch in the maximum range of AC voltage. If it is not used for a long time, the battery inside the mulmeter should also be taken out to prevent the battery from corroding other devices in the meter.
1. If the 2113 electronic multimeter is used, first set the 4102 position to ohm for 5261.
2. Antes usar, make sure that the pointer of 1653 is at 0Ω, and put the front ends of the red pen and the black pen together, which will cause a short circuit. If the pointer has not reach 0Ω, you can turn the zero knob Q to make the point point at 0 Ω.
3. Insert the red stylus into the "VΩ" hole and the black stylus into the "COM" hole, and then select the gear of the resistance file according to the resistance of the circuit to be tested.
4. Para medir a resistência valor de o circuito, primeiro set o multímetro para o máximo resistência engrenagem. Se o digital display é pequeno e impreciso durante medição, ajuste a engrenagem.
5, o melhor leitura é apenas dois dígitos depois o decimal ponto, e o dados leitura por ajustar para este engrenagem é o mais preciso.
