Small make up teach you how to test the pressure gauge

A pressure gauge accuracy test, took the range of 0 ~ 25%, 76, 26 ~ 75% ~ 100% of that test accuracy meets the requirements. Pointer process should be smooth, no jump needle, stagnation phenomenon. Second, the pressure gauge to zero inspection pointer should be within the zero mark line; Limited check nails, nail should be close to the limit, and within the zero mark line. Three, pressure gauge visual inspection: visible parts have no obvious blemishes, scratches or damage to the four CARDS, pressure table test scale, brand and color in accordance with customer requirements; Requirement for printing quality, information on the card printing content complete and clear; Five, the pressure tap thread joint inspection cannot fall without and bald and the phenomena of teeth grinding. Using vernier caliper and thread ring gauge inspection joint is in line with the requirements. Six, pressure unit inspection, inspection table material meets the customer's requirements, table should maintain a transparent light, no oil, scratches. Seven, the structure of the pressure gauge inspection installation, pan, cover, inside the machine, the pointer is in line with the requirements.