유지 보수 방법 기계 멀티 미터 및 포인터 멀티 미터 오작동
포인터 시스템 악기 are 분할 안으로 자기 전기 악기 및 전자기 악기. 전류 포인터 멀티 미터 is 주로 자기 전기 악기. 기한 to the low sensitivity of electromagnetic instruments, electromagnetic instruments are generally used in industrial 전압계 and Ammeter. 일치 to 다른 자기 회로, 자기전기 기기 are 분할 into three types: internal magnetic, external magnetic, internal and external magnetic, The pointer multimeter with an external magnetic head is easily affected by external magnetic field interference, which can cause inaccurate measurement. Therefore, a metal shielding plate is usually designed on the back cover plate of the multimeter for the 포인터 멀티 미터 외부 자기 헤드. 기능 금속 차폐 플레이트 to 차폐 외부 전자기 필드 간섭 % 2c 제작 측정 미터 더 정확한.
왜냐하면 the external magnetic meter head is prone to introducing interference from external electromagnetic fields, resulting in inaccurate measurement, a metal shielding plate is installed on the back cover plate of the multimeter to achieve better accuracy in measurement. 그러나, the internal magnetic meter head is generally not designed because it is not easy to introduce interference from external magnetic fields, and the internal magnetic meter head has strong anti-interference ability.
1, Internal composition of magnetoelectric instruments
거기에 둘 부품 내부 그 자기전기 계기: 하나 이다 그 움직일 수 있는 부분, 그리고 다른 이다 그 고정 부분. 고정 부분 포함 그 이동 코일, the 고정 코일, 그리고 the movable part includes the spring spring spring spring, pointer, and damping device. The function of the moveing coil and the fixed coil is mainly to generate magnetic field force by applying current, the function of the spring spring spring is mainly to generate reaction torque to drive the meter needle to deflect, and the function of the damper is to, When the pointer is deflected by the force of a magnetic field, a certain amount of inertia is generated, and 기능 의 the damper is to 흡수 this 관성 so that the pointer can stop at a certain point as soon as possible to achieve rapid reading.
2, The working principle of magnetoelectric instruments
