Do you know the pressure gauge needle jumping what reason be

Pressure gauge in the process of industrial process control and technology measure, due to the flexibility of general pressure gauge sensor has high mechanical strength and production convenient, installation simple reading convenient features, makes the general pressure gauge is more and more widely used. General pressure gauges for measuring no explosion, crystallize, solidify, for copper and copper alloy non-corrosive effect of the liquid, gas or steam pressure and vacuum. Pressure gauges in use jump pin is what reason? Below small make up for your answer: 1. Transmission parts fit clearance is too small, cause the drive is not flexible. Suggest appropriate increase the tolerance clearance, or add a few clocks oil, can reduce needle jumping phenomenon. Reason 2. Activity site had product between driving a corrupt or rust, caused by the transmission is not flexible. If there is rust cleaning before cleaning, remove dirt. The reason. 3. Free end connected to the connecting rod is not flexible adjustment to flexible connection mode. 4 the reasons. Pointers and table card, table touch by friction. Recommended corrective pointer. Reason 5: gear wear and tear or bad cooperation. The proposal cooperates, adjust the gear tooth or change gear. Finally tell you should pay attention to is: pressure gauge working environment should be no corrosive gas. Pressure of work it is advisable to use the full range of 1/3 to 2/3, scope of use shall not exceed the highest 3/4 of the full scale. Verification period is generally not more than half a year, pressure medium to large fluctuations, used frequently, the accuracy of the demand is higher, and more strict with safety factor, will test cycle shorten appropriately according to the specific situation.