To do a good job in the maintenance of the pressure gauge should do the following work：
1、The pressure gauge should be kept clean, the glass on the dial should be bright and clear, so that the pressure value indicated by the pointer in the dial can be clearly and easily visible, and the pressure gauge with broken dial glass or blurred dial scale should be stopped.
2、The connecting pipe of the pressure gauge should be blown regularly to avoid blockage. Especially the pressure gauge connecting pipe used for gas with more oily dirt or other viscous substances should be flushed frequently.
3、Always check whether the rotation and fluctuation of the pressure gauge pointer are normal, and check whether the cock on the connecting pipe is in the fully open position.
4、The pressure gauge must be calibrated regularly, and the specific analysis can be carried out according to the use situation：
1)After the pressure gauge has been in operation for three months, a primary maintenance is required. The main purpose is to check whether the pressure gauge can return to zero, check whether the three-way cock and the water storage elbow joints are leaking, and check and flush the water storage elbow to ensure smooth flow. .
2)After the pressure gauge has been in operation for one year, a secondary maintenance is required. At this time, the pressure gauge can be disassembled and sent to the measurement department for verification and lead sealing. Disassemble and inspect the water trap, the threaded fasteners should be intact. Disassemble and inspect the three-way cock, grind the sealing surface, and ensure that it is tight and does not leak. The connecting thread should be intact. Water trap, three-way cock to remove rust and paint.
5、When the pressure gauge is found to be inaccurate during operation, it must be replaced in time. The replacement pressure gauge must be a lead-sealed pressure gauge that has been verified by the measurement department, a pressure gauge that is within the validity period of the verification, or a new meter that has a factory certificate. Before changing the meter, the three-way cock must be screwed to the position of flushing the pressure gauge, and the dirt in the trap pipe must be flushed. Screw the three-way cock to the position where the water trap can store water, use a wrench to remove the old gauge and replace it with a new pressure gauge. Rotate the three-way cock to its normal working position to put the new watch into operation.
The above is about the maintenance methods of the pressure gauge. After the pressure gauge calibrator is used for the first stage, the internal oil circuit should be cleaned regularly, and fresh medium should be replaced to prevent the unclean material of the person being inspected from clogging the pipeline and corroding the body. Only the correct use and attention to the maintenance of the instrument can prolong the service life of the pressure gauge and the accuracy of the measurement results.
