Diaphragm pressure gauge how to check before use? How to check before the diaphragm pressure gauges installed? Release date: 2019 04 - 11 reading

Diaphragm pressure gauge measuring pressure, measured directly effect on the isolated patch working medium, the deformation of the diaphragm produces lift up through the spring tube filling liquid transfer medium pressure to the spring tube, end spring tube to produce elastic deformation, with the help of connecting rod mechanism drives the machine core shaft rotation, so that the pointer to indicate the measured pressure value on the dial. Before we use the diaphragm pressure gauge, usually there is a verification program, including diaphragm pressure gauge appearance inspection, diaphragm pressure gauge to check the zero and diaphragm pressure value verification. Pressure gauge inspection: the main check verification step zero parts installed firmly stuck, whether any loose phenomenon, check whether the index plate is marked with make in, product names, accuracy grades, and factory number, check whether the diaphragm pressure gauge on the surface of transparent, farmers plate logo is clear. Pressure gauge zero check: check in the absence of pressure, for the diaphragm pressure gauge with pointer, pointer to pointer is close to the pin; For they did not have the pressure of the pointer pin verification, zero if the zero mark, check whether the zero mark is twice more than the allowable error value of precision grade. Pressure value verification of representation: verification value for main for, hysterisis error and tapping of error of displacement for verification. Verification, in line with the principles, smooth booster for each inspection point value for verification. Appeared in the process of verification, observe whether the pointer jitter, stuck phenomenon, then smooth step-down, observe whether the hysterisis error is greater than the permissible error, the value of the designated to step up and down to jilt verification, to gently tap on a case and observing in percussion watchcase, half of the pointer changes in displacement quantity is greater than the value of the error, in the process of verification, must pay attention to can't regulate the diaphragm pressure gauge, wait until after the verification, in check the zero point whether meet the requirements, and in the absence of pressure load, for diaphragm pressure gauge with pointer pin, observe whether pointer is close to the pointer pin; With no pointer pin gauge, observe whether zero is located in the zero mark.