Ordinary seismic magnetic solid electric contact pressure gauge

The control process of a regular anti-seismic magnetic fixed electric contact pressure gauge is as follows: when the pressure reaches (or when the machine is turned on) *, the movable contact (common terminal of the power supply) of the electric contact pressure gauge is connected to the lower limit contact, the relay J1 is activated and self-locking, its normally open contact is closed to drive J3, and the motor is powered on to operate. When the pressure reaches the upper limit, the movable contact is connected to the upper limit contact, and the relay J2 is activated. Its normally closed contact is disconnected, cutting off the power supply to J1. Its normally open point is disconnected, J3 is released, and the motor stops running. Repeat this process to achieve automatic control.