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Industry Information
Method for adjusting pressure indication value out of tolerance
2011-9-1 15:04:00

    

比较普遍, 以下是几点 调整方法: The single-coil spring tube pressure gauge is a pressure gauge that is widely used in industry. During the verification process, the problem of excessive value indication is also common. The following are some adjustment methods:
  
超差值相同。 1. The difference value at each check point is the same. After boosting, the pointer can be reinstalled at the first verification point other than zero to calibrate the indication.

、示值超差 先显示 正误差后 显示 负误差。 2. The displayed value difference shows the positive error first and then the negative error. Turn the movement counterclockwise to increase the included angle between the drawbar and the sector gear; otherwise, turn the movement clockwise to reduce the included angle. 误差 呈线性误差,再移动示值调节螺钉即可。 After adjustment , the error will show a linear error, and then you can move the indication adjustment screw.

   
、差值呈线性误差。 3. The difference is a linear error. 误差逐渐增加时,将示值调节螺钉向外移以增加臂长; 如果 反之,则向内移,减少臂长。 When the error gradually increases, move the indication adjustment screw outwards to increase the arm length; if not , move it inward to decrease the arm length.

、仅有一两个点超差。 4. Only one or two points are out of tolerance. 说明 齿轮啮合处有污物、毛刺;为负差时, 说明 齿牙磨损和有伤,应修补或 更换。 Check the fit of the movement near this point. When the difference is positive, it means that there is dirt and burrs at the gear meshing; when it is negative, it means that the teeth are worn and injured, and they should be repaired or replaced.

、示值在压力一半附近超差。 5. The indication is out of tolerance around half the pressure. After boosting, the pointer can be reinstalled in the middle position. If the error cannot be eliminated, the angle between the lever and the sector gear should be adjusted for comprehensive adjustment.

6. Adjust the pressure gauge many times, but the back and forth difference is still too bad, and the pointer does not return to the zero position, the spring tube may be deformed and needs to be replaced again.
  

After the adjustment is completed, the components of the pressure gauge are assembled and re-verified in accordance with the verification procedures.