Instrumentation Matrix

Written by Jerry Ratzlaff. Posted in Instrumentation

Instrument Bubble Nomenclature

LetterFirst LetterSecond & Succeeding Letters
A Analyzer Alarm
B Burner or Combustor Choice
C - Controller*
D - -
E Voltage Sensor (Primary Element)
F Flow -
G - Glass
H Hand High**
I Current (Electrical) Indicator
J Power -
K Time

Schedule

Control Station*
L Level Light / Low**
M - Middle**

Intermediate**

N - User Choice
O - Orifice or Restriction
P Pressure Point Connection
Q Quantity -
R Radiation Recorder
S Speed Switch*
T Temperature Transmitter*
U Multivariable Multivariable / Multifunction
V Vibration Valve*
W Weight Well
X Unclassified User Choice
Y Event Relay* / Computer* / Convertor*
Z Position Driver* / Actuator* / Final Control Element*
  • *Denotes an output function
  • **Denotes an additional modifier

Alarms and Switches

LetterFirst LetterHighLowCombination
A Analyzer ASH / AAH ASL / AAL ASHL / AAHL
B Burner or Combustor BSH / BAH BSL / BAL BSHL / BAHL
C - - - -
D - - - -
E Voltage ESH / EAH ESL / EAL ESHL / EAHL
F Flow Rate FSH / FAH FSL / FAL FSHL / FAHL
G - - - -
H Hand - - HS
I Current (Electrical) ISH / IAH ISL / IAL ISHL / IAHL
J Power JSH / JAH JSL / JAL JSHL / JAHL
K Time, Schedule KSH / KAH KSL / KAL KSHL / KAHL
L Level LSH / LAH LSL / LAL LSHL / LAHL
M - - - -
N - - - -
O - - - -
P Pressure PSH / PAH PSL / PAL PSHL / PAHL
Q Quantity QSH / QAH QSL / QAL QSHL / QAHL
R Radiation RSH / RAH RSL / RAL RSHL / RAHL
S Speed SSH / SAH SSL / SAL SSHL / SAHL
T Temperature TSH / TAH TSL / TAL TSHL / TAHL
U Multivariable - - -
V Vibration VSH / VAH VSL / VAL VSHL / VAHL
W Weight WSH / WAH WSL / WAL WSHL / WAHL
X Unclassified - - -
Y Event YSH / YAH YSL / YAL -
Z Position ZSH / ZAH ZSL / ZAL -

Controllers

Letter First LetterTypical Controller Tags
A Analyzer ARC / AIC / AC
B Burner or Combustor BRC / BIC / BC
C - -
D - -
E Voltage ERC / EIC / EC
F Flow FRC / FIC / FC / FCV
G - -
H Hand HIC / HC
I Current (Electrical) IRC / IIC
J Power JRC / JIC
K Time / Schedule KRC / KIC / KC / KCV
L Level LRC / LIC / LC / LCV
M User\'s Choice -
N - -
O - -
P Pressure PRC / PIC / PC / PCV
DP Differential Pressure DPRC / DPIC / DPC / DPCV
Q Quantity QRC / QIC
R Radiation RRC / RIC / RC
S Speed SRC / SIC / SC / SCV
T Temperature TRC / TIC / TC TCV
DT Differential Temperature DTRC / DTIC / DTC DTCV
U Multivariable -
V Vibration -
W Weight WRC / WIC / WC / WCV
X Unclassified -
Y Event YIC / YC
Z Position ZRC / ZIC / ZC / ZCV