4/19/2023 0 Comments Dowload surplusmeter– Table 3 the graphic identification of the actuators – Table 2 the graphic identification of the valves – Table 1 identifying the function of the instruments or devices Graphical representation of a temperature recorder controller of the 101A loop, suitable for control room mounting If an instrument has a circumscribed square means that it is an integrated instrument as a function in a DCS (Distributed Control System) or PLC (Programmable Logic Controller). No line in the center: for an instrument suitable for field application.The dotted line in the center: for an instrument suitable for technical room mounting.Continue Line in the center: for an instrument suitable for control room mounting.The circle that identifies the instrument or device has: The symbology of the instrument it is placed in a circle of 7/16 “or 12 mm (see below), was in the top there is the functional identification (of the instrument or device) composed with max 5 letters, and in the bottom there is identification of the loop (measurement and/or control) consists of a progressive number of 3 or 4 numbers, followed by a literal suffix to identifies two or more identical instruments inserted in the same chain and therefore having the same functional identification The symbology for the identification of the measurement and control instrumentation on the flow and process diagrams and on the P&ID (Piping & Instrument Diagram), commonly called P&I (Piping & Instrumentation), is generally compliant with the Standard ISA (Instrumentation Society of Automation) identified as S.5, that is composed of identification codes and graphic symbols. ![]()
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