During verification, the measurement range of the selected pressure standard should be greater than or equal to the measurement range of the digital pressure gauge. The absolute value of the maximum allowable error of the standard device should be less than 1/3 of the absolute value of the maximum allowable error of the tested pressure gauge.

When the digital pressure gauge is verified, it must be placed in a standard environment of 20 degrees for more than 2 hours before the verification can be started.

During verification, the verification point must be greater than or equal to 10 points for pressure gauges above grade five per ten thousand. The verification points of pressure gauges with accuracy grades of 0.1 and below shall not be less than 5 points.

When the digital pressure gauge is verified, there will be 2 cycles of lifting and lowering cycles of level 0.05 and above, and 1 cycle of lifting and lowering cycles of level 0.1 and below, and the data of each point shall be recorded.