TotalFlow XRC6490, Руководство пользователя

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B-1
Appendix B
Definitions & Acronyms
TERM DEFINITION
µ Greek letter for “mu”. Often used in math and engineering as the symbol for
“micro”. Pronounced as a long u.
µ
FLO IMV
µ
FLO’s measurement and operational features are housed in this single unit
assembly. The main electronic board (
µ
FLO-195 Board), communication
connection, power, SP, DP and Temperature readings are all housed in this
unit.
µ
FLO-2100767 Board Main Electronic Board used in the
µ
FLO Computers. It is housed on an
integrated assembly and includes the IMV. It operates at 195 MHz while
drawing minimal power.
µ
Sec Micro Second.
µ
FLO 6200
This Totalflow Flow Computer is housed in a small lightweight enclosure. It’s
main feature is it’s low power, microprocessor based units designed to meet a
wide range of measurement, monitor and alarming applications for remote gas
systems, while being a cost effective alternative.
*.CSV file See Comma Separated Values (I.E. spreadsheet format).
*.INI file See Initialization File.
A/D Analog-to-digital.
ABB Inc. Asea, Brown & Boveri, parent company of Totalflow
Absolute Pressure Gauge pressure plus barometric pressure. Totalflow devices use Static
Pressure (SP) for flow calculations.
Absolute Zero
The zero point on the absolute temperature scale. It is equal to -273.16
degrees C, or 0 degrees K (Kelvin), or -459.69 degrees F, or 0 degrees R
(Rankine).
Absorber A tower or column that provides contact between natural gas being processed
and a liquid solvent.
Absorption The process of removing vapors from a stream of natural gas by passing the
natural gas through liquids or chemicals which have a natural attraction to the
vapors to be removed from the stream.
Absorption Factor A factor which is an indication of the tendency for a given gas phase
component to be transferred to the liquid solvent. It is generally expressed as
A=L/KV where L and V are the moles of liquid and vapor, and K is the average
value of the vapor-liquid equilibrium constant for the component of concern.
Absorption Oil A hydrocarbon liquid used to absorb and recover components from the natural
gas being processed.
AC See Alternating Current.
Accuracy How closely a measured value agrees with the correct value. Usually
expressed as ± percent of full scale output or reading.
Acid Gas See Gas, Acid.
ACK See Acknowledgment.
Acknowledgment This refers to a response over a remote communication device to a request
such as a PING. Basically, saying, "I'm here, and I saw your request!"
ACM See Analyzer Control Module.
Acoustics The degree of sound. The nature, cause, and phenomena of the vibrations of
elastic bodies; which vibrations create compressional waves or wave fronts
which are transmitted through various media, such as air, water, wood, steel,
etc.