Is the gauge pressure shown on a pressure gauge or vacuum gauge compared to the local atmospheric pressure?
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Is the gauge pressure shown on a pressure gauge or vacuum gauge compared to the local atmospheric pressure? In that case, for the same gauge, when moved from one place to another, the pressure measured by it, despite showing the same value, is actually not equal? Or, no matter where the pressure gauge is placed, it is always compared to 1 standard atmosphere, which is 1.01325×105 Pa?
Using the local atmospheric pressure as the zero point of the scale, in terms of the traceability of the values, standards such as piston manometers are calibrated during testing according to the gravitational acceleration at the location where they will be used.
Zero it before use; once in use, the gauge pressure will equal the pressure being measured. Absolute pressure is the one for which atmospheric pressure needs to be taken into account
According to what was said upstairs, the gauge pressure is measured based on the atmospheric pressure at the time the pressure gauge is zeroed before use.
Do I need to zero it before use? How to adjust it?
When viewing a gauge pressure meter from the perspective of absolute pressure, its readings change with each second...... To understand the concept of pressure, refer to this diagram: Source: Shaanxi Shuaike Sensing Instrument Manufacturing Co., Ltd._Villagers’ Training Materials :lol
Shuaitu said that the villagers should be clearly instructed that: 1. The pressure of the atmospheric environment (absolute pressure) is not a constant value; it is constantly changing gradually. The daily fluctuation in atmospheric pressure is approximately 200 Pa, while the annual fluctuation is around 3000 Pa. 2. Gauge pressure meters, including negative pressure meters as well as those that can measure both positive and negative pressures, are all pressure measuring devices that use the immediate ambient atmospheric pressure as their reference zero point. In other words, a gauge pressure meter is essentially a pressure detector with a dynamic zero point. “\"Instantly\" – do you understand what \"instantly\" means? Reptiles, little reptiles – if you haven’t learned the relevant terms in Chinese and can’t understand it, then go look them up in a Chinese dictionary. Damn it, stop complaining; older guys like us won’t give any explanations or do any favors. :lol
This post was last edited by 1111111 on 2019-7-7 18:41. In terms of manufacturing process, a gauge pressure meter is simply a special case of a differential pressure meter with an enclosure. The same differential pressure chip can be used to manufacture gauge pressure meters, differential pressure meters, negative pressure meters, or meters that can measure both positive and negative pressures...... Just like small reptiles, they can be cooked, steamed, fried, or battered and then chopped into pieces to eat....... :lol
It must be based on the local atmospheric pressure. Do you think a gauge used on the Moon can be used on Earth? Hahaha