What do you think of the car air pump barometer?

The correct view method of the automobile air pump barometer is: 1, the included angle between the center line of the air pressure metering port and the axis of the barometer is 90- 180, the scale is quadrilateral, and the range scale value is 0.07Wpa-0.4Wpa Before reading, tap the instrument shell or surface glass with your fingers to eliminate the friction in the transmission mechanism.

2. When observing, the pointer overlaps with the mirror pointer. At this time, the indicated value of the pointer is air pressure, and the reading is accurate to one decimal place. Read the temperature indication value on the barometer, accurate to one decimal place;

3. Align the groove at the measuring end of the barometer with the tire valve and press it. At this time, the pointer of the tire barometer deflects, and its indicated value is the inflation pressure of the tire, or the reference of the tire barometer is pushed out under the action of air pressure, and then the value displayed on the reference is the inflation pressure of the tire. The greater the tire pressure, the more biased the pointer.

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