How to treat the two hands of the barometer of large trucks? Red and white?

The red pointer is used to indicate the pressure of the rear axle brake air chamber, and the white pointer is used to indicate the pressure of the rear axle air tank.

The double-needle barometer is printed with red and white characters above the two joints of its shell, indicating that the instrument pointer corresponding to the pipe joint printed with the word "red" is red, and the instrument pointer corresponding to the pipe joint printed with white characters is white.

The double-needle barometer is printed with red and white characters above the two joints of its shell, indicating that the instrument pointer corresponding to the pipe joint printed with the word "red" is red, and the instrument pointer corresponding to the pipe joint printed with white characters is white. Therefore, the "red" connector should be connected to the pipeline of the rear axle brake air chamber, and the "white" connector should be connected to the pipeline of the rear axle air storage tank.

Extended data:

Instrument selection must meet the requirements of process production. For example, whether remote transmission, automatic recording or alarm are needed; Properties of the measured medium (such as temperature, viscosity, corrosiveness, dirt, flammability and explosion, etc.). ) put forward special requirements for the instrument.

Requirements for site environmental conditions (such as humidity, temperature, magnetic field strength, vibration, etc.). ) on the instrument type, etc. Therefore, the correct selection of instrument type according to process requirements is an important prerequisite to ensure the normal operation and safe production of instruments.