Instrument Abbreviations

Written by Jerry Ratzlaff on . Posted in Instrumentation

Typically instrument abbreviations consist of two parts. The first letter indicates the process. The second letter or two letters indicates the function. Sometimes a third letter is used to indicates additional measured variables. These letters identify the instrumentation process and are displayed in a instrument bubble consisting of two parts. The top half of the bubble represents the process and the bottom half the tag number.

A

  • AAH - Analyzer Alarm High
  • AAL - Analyzer Alarm Low
  • AC - Analyzer Controller
  • AE - Analyzer Element
  • AH - Alarm High
  • AI - Alarm Indicator
  • AI - Analyzer Indicator
  • AIC - Analyzer Indicator Controller
  • AIT - Analyzer Indicator Transmitter
  • AL - Alarm Low
  • AO - Analog Output
  • AOJ - Auto-Off-Jog Selector Switch
  • AP - Analyzer Test Point
  • AR - Analyzer Recorder
  • ARC - Analyzer Recorder Controller
  • ART - Analyzer Recorder Transmitter
  • ASH - Analyzer Switch High
  • ASHL - Analyzer Switch High Low
  • ASL - Analyzer Switch Low
  • AT - Analyzer Transmitter
  • ATM - Atmosphere
  • AY - Analyzer Computer
  • AW - Analyzer Probe
  • AWT - Automatic Well Test

B

  • B - Burner
  • BC - Burner Controller
  • BDV - Blow Down Valve
  • BE - Burner Element
  • BG - Burner Glass
  • BI - Burner Indicator
  • BIC - Burner Indicator Controller
  • BIT - Burner Indicator Transmitter
  • BPV - Back Pressure Valve
  • BR - Burner Recorder
  • BRC - Burner Recorder Controller
  • BRT - Burner Recorder Transmitter
  • BSH - Burner Switch High
  • BSHL - Burner Switch High Low
  • BSL - Burner Switch Low
  • BT - Burner Transmitter
  • BW - Burner Probe
  • BY - Burner Computer

C

  • CAH - Conductivity Alarm High
  • CAL - Conductivity Alarm Low
  • CC - Corrosion Coupon
  • CE - Conductivity Element
  • CIT - Conductivity Indicating Transmitter
  • CP - Cut Probe
  • CS - Car Seal
  • CSC - Car Seal Closed
  • CSO - Car Seal Open
  • CS - Conductivity Switch
  • CSH - Conductivity Shutdown High
  • CSL - Conductivity Shutdown Low

D

  • DE - Density Element
  • DR - Density Recorder
  • DT - Density Transmitter
  • DPSH - Differential Pressure Shutdown High
  • DPSL - Differential Pressure Shutdown Low
  • DTT - Differential Temperature Transmitter
  • DI - Discrete Input (Digital Input)
  • DO - Discrete Output (Digital Output)

E

  • ESD - Emergency Shutdown
  • EY - Voltage Computer
  • EC - Voltage Controller
  • EE - Voltage Element
  • EI - Voltage Indicator
  • EIC - Voltage Indicator Controller
  • EIT - Voltage Indicator Transmitter
  • ER - Voltage Recorder
  • ERC - Voltage Recorder Controller
  • ERT - Voltage Recorder Transmitter
  • ESH - Voltage Switch High
  • ESHL - Voltage Switch High Low
  • ESL - Voltage Switch Low
  • ET - Voltage Transmitter

F

  • FC - Fail Closed
  • FO - Fail Open
  • FP - Fail Position
  • FA - Fire Alarm
  • FA - Flame Arrestor
  • F - Flow
  • FY - Flow Computer
  • FCV - Flow Control Valve
  • FC - Flow Controller
  • FE - Flow Element
  • FG - Flow Glass
  • FI - Flow Indicator
  • FIC - Flow Indicator Controller
  • FIT - Flow Indicator Transmitter
  • FM - Flow Meter
  • FO - Flow Orifice
  • FQY - Flow Quantity Computer
  • FQE - Flow Quantity Element
  • FQI - Flow Quantity Indicator
  • FQIC - Flow Quantity Indicator Controller
  • FQIT - Flow Quantity Indicator Transmitter
  • FQR - Flow Quantity Recorder
  • FQRC - Flow Quantity Recorder Controller
  • FQSH - Flow Quantity Switch High
  • FQSL - Flow Quantity Switch Low
  • FQT - Flow Quantity Transmitter
  • FFC - Flow Ratio Controller
  • FFI - Flow Ratio Indicator
  • FFIC - Flow Ratio Indicator Controller
  • FFR - Flow Ratio Recorder
  • FFRC - Flow Ratio Recorder Controller
  • FFSH - Flow Ratio Switch High
  • FFSL - Flow Ratio Switch Low
  • FR - Flow Recorder
  • FRC - Flow Recorder Controller
  • FRT - Flow Recorder Transmitter
  • FSV - Flow Safety Valve
  • FS - Flow Switch
  • FP - Flow Test Point
  • FT - Flow Transmitter

G

  • GDE - Gas Detector Element

H

  • HC - Hand Controller
  • HIC - Hand Indicator Controller
  • HS - Hand Switch
  • HOA - Hand-Off-Automatic Selector Switch

I

  • IY - Current Computer
  • IE - Current Element
  • II - Current Indicator
  • IIC - Current Indicator Controller
  • IIT - Current Indicator Transmitter
  • IR - Current Recorder
  • IRC - Current Recorder Controller
  • IRT - Current Recorder Transmitter
  • ISH - Current Switch High
  • ISHL - Current Switch High Low
  • ISL - Current Switch Low
  • IT - Current Transmitter
  • IA - Instrument Air

J

  • JY - Power Computer
  • JE - Power Element
  • JI - Power Indicator
  • JIC - Power Indicator Controller
  • JIT - Power Indicator Transmitter
  • JR - Power Recorder
  • JRC - Power Recorder Controller
  • JRT - Power Recorder Transmitter
  • JSH - Power Switch High
  • JSHL - Power Switch High Low
  • JSL - Power Switch Low
  • JT - Power Transmitter

K

  • KY - Time Computer
  • KCV - Time Control Valve
  • KC - Time Controller
  • KE - Time Element
  • KI - Time Indicator
  • KIC - Time Indicator Controller
  • KIT - Time Indicator Transmitter
  • KR - Time Recorder
  • KRC - Time Recorder Controller
  • KRT - Time Recorder Transmitter
  • KSH - Time Switch High
  • KSHL - Time Switch High Low
  • KSL - Time Switch Low
  • KT - Time Transmitter

L

  • LACT - Lease Automatic Custody Transfer
  • L - Level
  • LAD - Level Alarm Device
  • LAHI - Level Alarm High Interface
  • LY - Level Computer
  • LCV - Level Control Valve
  • LCVI - Level Control Valve Interface
  • LC - Level Controller
  • LCI - Level Controller Interface
  • LD - Level Differential
  • LE - Level Element
  • LEI - Level Element Interface
  • LG - Level Glass
  • LI - Level Indicator
  • LIC - Level Indicator Controller
  • LICI - Level Indicator Controller Interface
  • LIT - Level Indicator Transmitter
  • LP - Level Probe
  • LR - Level Recorder
  • LRC - Level Recorder Controller
  • LRT - Level Recorder Transmitter
  • LSHI - Level Shutdown High Indicator
  • LSL - Level Shutdown Low
  • LSLI - Level Shutdown Low Indicator
  • LS - Level Switch
  • LSHH - Level Switch High High
  • LSL - Level Switch Low
  • LSLL - Level Switch Low Low
  • LT - Level Transmitter
  • LTI - Level Transmitter Interface
  • LL - Liquid Level
  • LLC - Liquid Level Controller
  • LLG - Liquid Level Gauge
  • LC - Lock Closed
  • LO - Lock Open

N

  • NOC - Net Oil Computer
  • NC - Normally Closed
  • NO - Normally Open

O

  • OWD - Oil Water Detector
  • OM - Orifice Meter

 P

  • PAD - Pressure Alarm Device
  • PY - Pressure Computer
  • PCV - Pressure Control Valve
  • PC - Pressure Controller
  • PDAH - Pressure Differential Alarm High
  • PDY - Pressure Differential Computer
  • PDCV - Pressure Differential Control Valve
  • PDC - Pressure Differential Controller
  • PDI - Pressure Differential Indicator
  • PDIC - Pressure Differential Indicator Controller
  • PDIT - Pressure Differential Indicator Transmitter
  • PDR - Pressure Differential Recorder
  • PDRC - Pressure Differential Recorder Controller
  • PDRT - Pressure Differential Recorder Transmitter
  • PDS - Pressure Differential Switch
  • PDSH - Pressure Differential Switch High
  • PDSL - Pressure Differential Switch Low
  • PDT - Pressure Differential Transmitter
  • PE - Pressure Element
  • PIT - Pressure Indicating Transmitter
  • PI - Pressure Indicator
  • PIC - Pressure Indicator Controller
  • PR - Pressure Recorder
  • PRC - Pressure Recorder Controller
  • PRT - Pressure Recorder Transmitter
  • PSE - Pressure Safety Element
  • PSV - Pressure Safety Valve
  • PSH - Pressure Shutdown High
  • PSL - Pressure Shutdown Low
  • PS - Pressure Switch
  • PP - Pressure Test Point
  • PT - Pressure Transmitter
  • PV - Pressure Valve
  • PLC - Programmable Logic Controller

Q

  • QY - Quantity Computer
  • QE - Quantity Element
  • QI - Quantity Indicator
  • QIC - Quantity Indicator Controller
  • QIT - Quantity Indicator Transmitter
  • QR - Quantity Recorder
  • QRC - Quantity Recorder Controller
  • QRT - Quantity Recorder Transmitter
  • QSH - Quantity Switch High
  • QSHL - Quantity Switch High Low
  • QSL - Quantity Switch Low
  • QT - Quantity Transmitter

R

  • RY - Radiation Computer
  • RC - Radiation Controller
  • RE - Radiation Element
  • RI - Radiation Indicator
  • RIC - Radiation Indicator Controller
  • RIT - Radiation Indicator Transmitter
  • RW - Radiation Probe
  • RR - Radiation Recorder
  • RRC - Radiation Recorder Controller
  • RRT - Radiation Recorder Transmitter
  • RSH - Radiation Switch High
  • RSHL - Radiation Switch High Low
  • RSL - Radiation Switch Low
  • RT - Radiation Transmitter
  • R - Recorder
  • RTD - Resistance Temperature Detector
  • RO - Restriction Orifice

S

  • SRV - Safety Relief Valve
  • SP - Set Point
  • SD - Shutdown
  • SDV - Shutdown Valve
  • SP - Spare
  • SAH - Speed Alarm High
  • SY - Speed Computer
  • SCV - Speed Control Valve
  • SC - Speed Controller
  • SE - Speed Frequency Element
  • SI - Speed Indicator
  • SIC - Speed Indicator Controller
  • SIT - Speed Indicator Transmitter
  • SR - Speed Recorder
  • SRC - Speed Recorder Controller
  • SRT - Speed Recorder Transmitter
  • SSH - Speed Switch High
  • SSHL - Speed Switch High Low
  • SSL - Speed Switch Low
  • ST - Speed Transmitter
  • SLO - Station Lock Out
  • SSV - Surface Safety Valve
  • S - Switch

T

  • TY - Temperature Computer
  • TCV - Temperature Control Valve
  • TC - Temperature Controller
  • TDI - Temperature Differemtial Indicator
  • TDR - Temperature Differemtial Recorder
  • TD - Temperature Differential
  • TDY - Temperature Differential Computer
  • TDCV - Temperature Differential Control Valve
  • TDC - Temperature Differential Controller
  • TDIC - Temperature Differential Indicator Controller
  • TDIT - Temperature Differential Indicator Transmitter
  • TDRC - Temperature Differential Recorder Controller
  • TDRT - Temperature Differential Recorder Transmitter
  • TDT - Temperature Differential Transmitter
  • TE - Temperature Element
  • TI - Temperature Indicator
  • TIC - Temperature Indicator Controller
  • TIS - Temperature Indicator Switch
  • TISHL - Temperature Indicator Switch High Low
  • TIT - Temperature Indicator Transmitter
  • TP - Temperature Probe
  • TR - Temperature Recorder
  • TRC - Temperature Recorder Controller
  • TRS - Temperature Recorder Switch
  • TRT - Temperature Recorder Transmitter
  • TSE - Temperature Safety Element
  • TS - Temperature Switch
  • TP - Temperature Test Point
  • TT - Temperature Transmitter
  • TW - Thermowell
  • T - Transmitter

U

  • UY - Multivariable Computer
  • UI - Multivariable Indicator
  • UR - Multivariable Recorder
  • ULO - Unit Lock Out
  • USD - Unit Shut Down

V

  • VFD - Variable Frequency Drive
  • V - Vent
  • VTA - Vent to Air
  • VAHH - Vibration Alarm High High
  • VY - Vibration Computer
  • VE - Vibration Element
  • VI - Vibration Indicator
  • VIT - Vibration Indicator Transmitter
  • VR - Vibration Recorder
  • VRT - Vibration Recording Transmitter
  • VS - Vibration Switch
  • VT - Vibration Transmitter

W

  • WY - Weight Computer
  • WCV - Weight Control Valve
  • WC - Weight Controller
  • WDC - Weight Differential Computer
  • WDCV - Weight Differential Control Valve
  • WDC - Weight Differential Controller
  • WDI - Weight Differential Indicator
  • WDIC - Weight Differential Indicator Controller
  • WDIT - Weight Differential Indicator Transmitter
  • WDR - Weight Differential Recorder
  • WDRC - Weight Differential Recorder Controller
  • WDRT - Weight Differential Recorder Transmitter
  • WDSH - Weight Differential Switch High
  • WDSL - Weight Differential Switch Low
  • WDT - Weight Differential Transmitter
  • WE - Weight Element
  • WI - Weight Indicator
  • WIC - Weight Indicator Controller
  • WIT - Weight Indicator Transmitter
  • WR - Weight Recorder
  • WEC - Weight Recorder Controller
  • WRT - Weight Recorder Transmitter
  • WSH - Weight Switch High
  • WSHL - Weight Switch High Low
  • WSl - Weight Switch Low

Y

  • YY - Event Computer
  • YC - Event Controller
  • YE - Event Element
  • YI - Event Indicator
  • YIC - Event Indicator Controller
  • YR - Event Recorder
  • YSH - Event Switch High
  • YSL - Event Switch Low
  • YT - Event Transmitter

Z

  • ZC - Position Controller
  • ZCV - Position Control Valve
  • ZDY - Gauge Deviation Computer
  • ZDCV - Gauge Deviation Control Valve
  • ZDC - Gauge Deviation Controller
  • ZDE - Gauge Deviation Element
  • ZDI - Gauge Deviation Indicator
  • ZDIC - Gauge Deviation Indicator Controller
  • ZDIT - Gauge Deviation Indicator Transmitter
  • ZDR - Gauge Deviation Recorder
  • ZDRC - Gauge Deviation Recorder Controller
  • ZDRT - Gauge Deviation Recorder Transmitter
  • ZDSH - Gauge Deviation Switch High
  • ZDSL - Gauge Deviation Switch Low
  • ZDT - Gauge Deviation Transmitter
  • ZE - Position Element
  • ZI - Position Indicator
  • ZIC - Position Indicator Controller
  • ZIT - Position Indicator Transmitter
  • ZR - Position Recorder
  • ZRC - Position Recorder Controller
  • ZRT - Position Recorder Transmitter
  • ZS - Position Switch
  • ZSC - Position Switch Closed
  • ZSO - Position Switch Open
  • ZSHL - Position Switch High Low
  • ZT - Position Transmitter
  • ZY - Position Computer