The difference between temperature detection and temperature display instruments
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I’m stuck on a question, and I’d like to ask my seniors for advice.: I saw some instrument symbols on a system diagram. First of all, TI stands for temperature display, right? TE stands for temperature detection, right? What exactly does temperature detection mean, and what are the main differences or functions between detection and display?
The detection is a primary meter, such as bimetal, thermal resistance, thermocouple, etc.； The display is a secondary meter, such as various digital display meters, DCS, etc.
It is very simple to take this problem to the instrument module. Temperature detection is used as a follow-up to the display. There is a context. If the temperature detection and display are integrated, then it is on site. If the temperature detection signal is to be remote, then the display is in the control room. .
T: represents the temperature ； I: means display ； E represents the detected component ； That is to say, TI represents the temperature display (such as temperature display instrument), while TE represents the primary temperature detection part (such as thermocouple, thermal resistor, etc.)
I still don’t understand how to see the specific measurement values if TE in the picture only means detection. If you want to see the measured values, you still have to display them. Isn’t that still TI?
Seniors upstairs, does the temperature display require a temperature detection component? Then shouldn’t the local temperature display be TEI? But I see the system diagram showing the local temperature display is TI. At this time, TI also has a TE function? ? ? A little dizzy, haha
Also, is the temperature remote transmission display code TT?
1. Generally, TI will be placed in the control room. 2. The instrument itself has a detection function, which is what you call E. In fact, whether or not to draw this part depends on the project requirements. It is completely understandable that TE is not drawn. 3.TT means transfer
Oh, then it should be a combination of TE and TI, or just TI alone. There is no need to indicate TE, right?
Another question is, are PG and PI the same? They represent local pressure display?
Yes, generally this is OK, but it still depends on the regulations of the project. If there are no regulations, just follow it.* Used to it. PG is on-site, and PI is usually the instrument room.