Please, expert, help me work on the next question about the absolute pressure of a transformer
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There is a question: a gauge pressure transmitter has a range of -100 to 500 KPa. If the transmitter is powered on without any setpoints being entered, what value will it display?
-99.9 ------Common mistakes for beginners
How was it determined? Could you explain it in detail, expert?
1. Gauge pressure refers to the pressure in a pipeline; it is the pressure measured using instruments such as pressure gauges, vacuum gauges, or U-tube manometers, and is also known as relative pressure. Gauge pressure is measured with respect to atmospheric pressure, and its symbol is Pg. 2. The pressure that acts directly on the surface of a container or object is called “absolute pressure.” The value of absolute pressure is measured with absolute vacuum as the reference point, and it is denoted by PABS (with ABS as the subscript). Absolute pressure is essentially gauge pressure plus the local atmospheric pressure. I think there’s a problem with the way you phrased it; I’d like to see what the original question says.
The local atmospheric pressure value should be displayed
This post was last edited by jujiangliu on 2015-11-4 08:18. The value indicated for the measurement range refers to gauge pressure; when no pressure signal is input, it should display “0”. The output signal is /x100%=16.7%, which means 16×16.7%+4=6.67(mA).
Can absolute pressure be negative? ? ? ? ? ? ? ? ?
Many sellers, when you ask them about absolute pressure transmitters, will say that negative values are possible. You need to tell them that you really need an absolute pressure transmitter for them to provide one to you;P
There is no such thing as negative absolute pressure; do you mean power supply during the period when the device has not been installed? If power connection is not installed, the display should be 0.00
Gauge pressure transmitter: no pressure input is required; it only needs to be powered on, and it displays the local atmospheric pressure.