Pressure gauge pointer is not zero?

Pressure gauge is a sensitive element (by table Bourdon tubes, bellows, bellows) Elastic deformation, the pressure deformation by the transformation of movement in table to Pointers, cause the hands to display the pressure. Pressure gauge pointer is not zero, a common cause and repair method is as follows: 1, the pointer is loose; Maintenance methods: pointer to hammer on 2, balance spring torque is too small; Maintenance methods: reverse rotation axis, increase hair spring 3, transmission gear of friction torque; Maintenance methods: adjust the gear tooth clearance 4, fall off balance spring; Maintenance methods: good balance spring 5 turntable, dial loose not tight; Maintenance methods: adjusting the dial fixed screw 6, pointer on the dial and glass table; Maintenance methods: correct the pointer shaft, again place heavy needle gauge refers to elastic element as the sensitive element, measure and instructions above environmental pressure meter, application is very common, it almost throughout all of the industrial process and research fields. In the heat pipe network, oil and gas transmission, water supply, gas supply system, vehicle maintenance shop, etc can be seen everywhere. Especially in the process of industrial process control and technology measure, due to the flexibility of mechanical pressure gauge sensor has high mechanical strength and production is convenient wait for a characteristic, make the mechanical pressure gauge is widely used.