Regarding the use of instruments at high altitudes
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Hey everyone, what effects do bimetallic thermometers, pressure gauges, and pressure transmitters have when used at high altitudes? Are there specialized models designed for such conditions? I’m looking for answers, thanks
Bimetallic thermometer; I’m not sure what’s going on with it. Pressure gauges, pressure transmitters, and other pressure measurement instruments see their readings and accuracy unaffected by the altitude of the location where they are used; go ahead and use them to the fullest extent possible. . .
:Lol, thanks! A bimetallic thermometer is just a temperature gauge
I’ve never seen such a strange question before. . Could he still be suffering from altitude sickness? If we’re talking about extremely cold winters in regions like Northeast Russia, some companies do produce display screens designed to withstand such weather conditions. But there’s nothing like that for altitude sickness
For pressure transmitters, it’s just a matter of resetting the zero point. Nothing else is affected!
It seems that only transmitters for nuclear applications are somewhat special at the moment. The rest are just selection issues; there is no difference.
Temperature should not have an impact, but pressure may have a slight effect. There are generally no specialized models; it’s sufficient as long as the temperature and pressure remain within appropriate ranges
Conventional pressure gauges measure gauge pressure, so there is no issue related to altitude. Furthermore, if the zero point is inaccurate, it can be adjusted. For use at high altitudes, take proper measures to protect against cold and freezing
Thermometers used in plains and plateaus have nothing special about them (but if it’s a thermometer with a thermometric bulb, care should be taken to protect that bulb). For pressure transmitters, especially those used to measure gauge pressure, the pressure zero point changes at high altitudes, requiring the instrument to be recalibrated for zero. Additionally, when accurately converting gauge pressure to absolute pressure, keep in mind that the atmospheric pressure in high-altitude areas is not the standard sea-level atmospheric pressure.
For gauge pressure transmitters, the negative pressure side is under vacuum; in high-altitude areas the readings are already different from those at sea level, so why is it necessary to calibrate the zero point? It’s actually a bad thing. For gauge pressure transmitters, the negative pressure side is actually connected to the outside environment, so there is no need to calibrate the zero point!
I have a question: I’m at a site in Tibet, and the gauge pressure transmitter is giving inaccurate readings. The manufacturer of the pressure transmitter told me that it needs to have its zero point calibrated. Is what he said wrong?