What are the requirements for the pressure gauge dial?

What are the requirements for the pressure gauge dial?

1. The scale on the pressure gauge dial: the pressure part should be scaled clockwise, and the vacuum part should be scaled counterclockwise.

2. The semi-thick line and semi-thin line are used for the long scale line on the pressure gauge dial. The width of the semi-thick line should not exceed the national regulations.

3. The scale angle on the pressure gauge dial should normally be 270 degrees.

4. The zero indexing line of the pressure gauge without disc stop pin should be equal to the allowable basic error of the pressure gauge.

The zero scale of the pressure gauge tape disc stop pin should be equal to (or less than) the absolute value of the allowable basic error. The size of the "shrink" is related to the accuracy of the pressure gauge.

5, the pressure gauge dial should generally be marked:

A, pressure gauge manufacturer name or trademark.

B, the name of the pressure gauge.

C, unit of pressure.

D, accuracy level.

E, marking of measuring instruments and production license number.

F, year and month of pressure gauge manufacture and pressure gauge number.