Issues with the gauge pressure meter’s indication? ? ? Is it affected by altitude?
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Experts, I need help! What does the reading of a gauge pressure meter depend on, and should its reference point be set at 1 atmosphere or at the local atmospheric pressure? Since it involves issues related to the operation of the distillation tower (absolute pressure affects the boiling point at the bottom of the tower and the temperature control at the top of the tower), I would appreciate some guidance from those with more experience. The tower equipment is open, with direct venting to the sky
A gauge pressure meter is based on the local atmospheric pressure, and when the atmospheric pressure changes, the reading of the gauge pressure meter also changes.
The function of an ordinary pressure gauge is to compare with the local atmospheric pressure at any time and place. The zero point of a pressure gauge equipped with a diaphragm and a sealing fluid is the local atmospheric pressure at the time the gauge is calibrated. As the local atmospheric pressure changes, the zero point will deviate (and consequently, the actual gauge pressure indicated will also deviate).
Thank you, expert! The gauge pressure design basis of our system is based on standard atmospheric pressure; therefore, in actual operation, the operating conditions of the distillation tower need to be adjusted. Try it then.
The indication of the gauge pressure meter is based on 1 atmosphere locally.
So I’m stuck – the design prototype for my company is an enterprise located by the sea, but it’s now situated at an altitude of over 1,000 meters
:):):):) Study hard*, thank you all
If the control requirements are really stringent, then use an absolute pressure gauge; for those with less stringent requirements, it’s sufficient to calibrate the zero point using the current atmospheric pressure