What does the symbol FQI on the flow element FE represent?
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Also, what is the difference between FT and FE? ps FT is the flow transmitter chrome://livemargins/skin/monitor-background-horizontal.png
FE refers to primary sensing elements such as orifice plates; generally, E denotes sensors. If the output signal is not a standard DDZ type 3 signal (4–20 mA or 1–5 V), then such an element is usually denoted as XXE. If it outputs a standard signal, it is denoted as XXT. FQI refers to the flow accumulation indicator
FE flow primary element, such as orifice plate; FQI for cumulative flow display
FE refers to the original measuring element, while FT is the transmitter; FQI provides flow accumulation indication. There is a difference between FT and FE – the latter is the field-level measuring element, whereas the former converts the signal from the latter into an electrical signal that is sent to a DCS, PLC, or other devices
Thank you to the two people above. Can it be understood this way: FQ is the combination of FE and FQI?
Reply to 5# robinhood008: It’s not a composite unit; it consists of two instruments (or three instruments): the FE (sensing element), such as orifice plates, etc； FT (transmitter), converts the signal from the sensing element into a standard 4–20mA signal ； FI, FIQ, FIC, etc. are secondary instruments; in the case of a DCS system, it refers to the DCS itself. Used to indicate and accumulate the value of the transmitter input. This constitutes a detection loop.