instrumentation summary

The first letter defi nes the measured or initiating variables such as Analysis (A), Flow (F), Temperature (T), etc. with succeeding lett er s defining readout, passive, or ou tp ut functi on s such as Indi cato r (I), Recor d (R), Transmit (T) , and so forth. Example Referring to the Example P&ID dia gram, FT 101 represe nts a field-mounted flow transmitter connected via electrical signals (dotted line) to flow indicating controller FIC 101 located in a shared control/display device. A square root extr ac ti on of th e input si gn al is ap pl ied as part of FI C 10 1¶ s functi on al it y . The output of FIC 101 is an electrical signal to TY 101 located in an inacces sible or behind-the-panel-board location. The output signal from TY 101 is a pneumatic signal (line with double forward slash marks) making TY 101 an I/P (current to pneumatic transducer). TT 101 and TIC 101 are similar to FT 101 and FIC 101 but are measuring, indicating, and controlling temperature. TIC 101¶s output is connected via an internal software or data link (line with bubbles) to the setpoint (SP) of FIC 101 to form a cascade control strategy .

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8/3/2019 Instrumentation Summary

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ExampleReferring to the Example P&ID diagram, FT 101 represents a field-mounted flowtransmitter connected via electrical signals (dotted line) to flow indicatingcontroller FIC 101 located in a shared control/display device. A square root

extraction of the input signal is applied as part of FIC 101¶s functionality.

The output of FIC 101 is an electrical signal to TY 101located in an inaccessible or behind-the-panel-board location. The output signal from TY101 is a pneumatic signal (line with double forward slash

marks) making TY 101 an I/P (current to pneumatictransducer). TT 101 and TIC 101 are similar to FT 101 andFIC 101 but are measuring, indicating, and controllingtemperature. TIC 101¶s output is connected via an internalsoftware or data link (line with bubbles) to the setpoint (SP) of FIC 101 to form a cascade control strategy.

8/3/2019 Instrumentation Summary

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8/3/2019 Instrumentation Summary

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First L e tt e r First letter indicates a measured or initiating variable, or a modifier, such as Current(I), Speed (S) or Flow (F).Mea sur ed or Initi a ting V a riable

A - AnalysisB - Burner, combustionC - User's choiceD - User's choiceE - VoltageF - Flow rateG- User's choiceH - HandI - Current (electrical)J - Power K - Time, time scheduleL - LevelM- User's choiceN- User's choiceO- User's choiceP - Pressure, vacuumQ - QuantityR - RadiationS - Speed, frequencyT - TemperatureU - MultivariableV - Vibration, mechanical analysesW - Weight, forceX - UnclassifiedY - Event, state or presenceZ - Position, dimensionMo d ifie r D - DifferentialF - Ration (fraction)J - ScanK - Time rate of changeM - MomentaryQ - Integrate, totalizer S - SafetyX - X-axisY - Y-axisZ - Z-axisZSH 001

S ec on d or Su cceed ing L e tt e rsSecond or succeeding letters indicates a readout or passive function, output function or a modifier function.Read out or P a ssiv e Fun c tion

A - AlarmB - User's choiceE - Sensor (primary element)G- Glass, viewing deviceI - IndicationL - LightN- User's choiceO- Orifice, restrictionP - Point (test connection)R - RecordU - MultifunctionW - WellX - UnclassifiedOut p ut Fun c tionB - User's choiceC - ControlK - Control Station

N- User's choiceS - SwitchT - TransmitU - MultifunctionV - Valve, damper, louver X - UnclassifiedY - Relay, compute, convertZ - Driver, actuator Mo d ifie r Fun c tionB - User's choiceH - HighL - Low

M - Middle, intermediateN- User's choiceU - MultifunctionX - UnclassifiedExample s - P&ID c o de sF low me te r - In d ica ting

FI 001Tempe r a tur e - Tr a ns m itt e r TT 001Contro l Val veFV 001Position Swit ch - Hig h Le velZSH 001