The impact of installation height on pressure transmitters

All I can say is that the \"diaphragm-type pressure transmitter\" you’re using is pretty crappy and of poor quality: first, it has significant errors in terms of orientation and position, and second, it has serious issues related to installation stress. {:2_35:} Let me show you a pressure transmitter that’s more rose-like and has a very pleasant fragrance. {:2_42:}

“\"Will a decrease in atmospheric pressure affect the gauge pressure reading?\" Answer: No, it has no effect. “If I set the zero point at a low altitude and then go to a high-altitude location to install it, will the pressure indicated by the gauge be higher or lower? ” Answer: The Fenfangxiangxiang pressure transmitters, no matter where they are installed or at what altitude, will always display consistent readings. For example, in the images I showed earlier, the zero reading of their gauges remains fixed at -0.0001 kPa, 0.0000 kPa, or 0.0001 kPa – it stays within these three values. As for those crappy quality pressure transmitters, some of their gauge readings drift significantly, while others show a value of 0.0000 kPa, which is nothing but a trick to deceive people. . .

That fragrantly scented pressure transmitter – if you use a micro-pressure pump to apply a gradual increase in pressure, you can see the reading on the gauge; it starts at 0.0Pa, then 0.1Pa, 0.2Pa, 0.3Pa, with the last digit of the reading increasing step by step. As for those fake pressure transmitters that act like they’re functioning properly, if you use a micro-pressure pump to apply gentle pressure, you can see that the gauge reading rises by dozens of Pa, yet the gauge on those fake transmitters remains at 0 Pa, showing no change at all. Do you know why? It’s a trick involving the use of a fake gauge to manipulate the small signal values; it’s meant to deceive you by making you think that its reading remains stable at zero. When you continue to apply gradual pressure, for example, until the gauge reads 60.0 Pa, the reading on the fake gauge will suddenly jump to a value like 75 Pa. Only after that, as you keep applying gradual pressure, will the last digit of the gauge’s reading start to change little by little.

Height has no effect; when the transmitter is placed horizontally, it measures the pressure difference. It should be zero when viewed head-on. There’s likely a quality issue with your watch. You can adjust the zero point after installation. .

Since the measured value is gauge pressure, altitude should theoretically have an impact (there is a height difference between the calibration environment and the operating environment). But in reality, it depends on the height difference (within 3000 meters, for every 10 meters of increase in height, the atmospheric pressure drops by 100 Pa). Therefore, it is correct that 2 mbar is displayed after removal at a height of 20 meters and then placed vertically (it was also in a vertical position during calibration).

Wrong! Severely misleading! The claim that “for every 10 meters increase in altitude, the atmospheric pressure drops by 100 Pa” is incorrect – what decreases is the absolute pressure. What does the change in absolute pressure have to do with the readings taken by a gauge that measures gauge pressure? Gauge pressure refers to readings that are always based on the immediate ambient atmospheric pressure at the location of the gauge, which serves as the reference zero point. No matter where the gauge is placed in space, whether the ambient atmospheric pressure changes or not, its reading should always be 0.0 Pa. If it’s not 0.0 Pa, then there’s some kind of drift in the gauge’s readings! We need to clarify the concept of pressure; let’s learn by looking at diagrams*. Moderator, moderator, how could a post with a serious mistake be recommended to be pinned? What I’m saying is the correct one; it’s the one that should be recommended and pinned. .

Personally, I think these drops in atmospheric pressure can be ignored

A pressure gauge, or gauge pressure meter, is a special case of a differential pressure gauge; it is a differential pressure sensor whose low-pressure side (reference side) is always connected to the atmospheric pressure in the surrounding environment. In such a gauge, it’s just that due to the product’s packaging structure, this low-pressure side cannot be seen with the naked eye. Why is that? Because the low-voltage side is enclosed inside the instrument’s casing, with no connection ports provided for you. So why aren’t any connection ports provided? Because, well......... .....I really don’t want to tell you, but I’ll just say it anyway – out of fear that you might mess things up or do something wrong. The monkeys laugh, {:2_40:} {:2_42:} {:2_45:} {:2_36:}

A pressure transmitter measures gauge pressure; since both the positive pressure side and the negative pressure side are in the same atmospheric environment, the theoretical differential pressure should be 0. Therefore, it has nothing to do with the altitude at which it is located.

There is no impact; it’s likely that the oil inside the diaphragm exerts different pressures on the force sensor due to different placement angles. Try zeroing it out by placing it flat