What is the reason why the pointer is off zero after the meter is used?
In this case, if the meter is qualified, the pointer is close to the plate stop nail after installation, and the stainless steel pressure gauge is used for a period of time. When the meter is removed or sent for verification, the pointer will deviate from zero.
There are many reasons for this:
1. Due to the greater elastic aftereffect of the spring tube in the pressure gauge, the pointer will leave zero after the instrument is used for a period of time. After this happens, instruments with a large range of 10MPa or more generally account for a larger proportion.
2. Due to the irregular operation of the user of the pressure gauge, the pressure suddenly increased to more than 2 times the range of the instrument, causing the spring tube to deform, or the movement segment teeth, and the pointer to move away from zero. This situation is generally called "turning the meter". beated".
3. When the instrument is working, if there is a certain vibration in the field environment, the precision pressure gauge may cause the pointer to leave zero due to the fact that individual screws are not tightened, the dislocation of the dial, the follower of the pull rod, and the movement of the movement.
