Adjustment Methods for Common Faults of Precision Pressure Gauges

Ⅰ. Zero point out-of-tolerance fault of precision pressure gauge

Adjustment method:

The first step is to remove the dial of the precision pressure gauge pointer, adjust the tightness of the balance spring under the dial, so that the balance spring has proper tension, and the laps are equally spaced and on the same horizontal plane, without collision and friction;

The second step is to re-install the pointer, gear, and sector wheel with the gears to return the pointer to its position and confirm whether there is still a zero-point out-of-tolerance phenomenon.

In addition, if the zero point deviation of the precision pressure gauge is not obvious, the fault can be eliminated by adjusting the dial.

Ⅱ. The error of the fixed value error of the precision pressure gauge

Adjustment method:

The adjustment method of the fixed value error fault is relatively simple. First, open the dial of the precision pressure gauge, adjust the pointer according to the regulations and fix it, and then reset the dial. After the adjustment is completed, check the pressure gauge to confirm whether the fault is eliminated.

Ⅲ. Precision pressure gauge tapping displacement failure

Adjustment method:

When a precision pressure gauge tapping displacement fault occurs, the cause of the fault should be determined first, and the cause of the fault should be adjusted and repaired. First, adjust the tightness of each component of the precision pressure gauge to ensure that the tightness is moderate. Secondly, replace the balance spring or adjust the tightness of the balance spring; again, re-rivet the loose parts in the pressure gauge; finally, clean the central shaft and shaft hole with gasoline to eliminate the jamming of the connecting rod rotating shaft; If the fault still cannot be eliminated, it is recommended to replace parts.

Ⅳ. The non-linear error of the precision pressure gauge

Adjustment method:

To adjust the nonlinear error, you first need to loosen the screw, push the pull rod inward or outward, adjust the angle between the pull rod and the sector gear, so as to eliminate the fault. If one adjustment cannot meet the requirements, repeat the adjustment procedure until the non-linear error of the precision pressure gauge disappears.