B-2
TERM DEFINITION
Active Analog Output
Analog Output to a host providing power to the host.
Active Mode
An operational mode used by the LevelMaster for measuring dual float levels
by applying a signal to the primary windings, reading the voltage level on the
secondary windings and using an algorithm to determine the oil and water
levels.
Adapter
A mechanism or device for attaching non-mating parts.
ADC
See Analog-to-Digital Converter.
Address
A unique memory designation for location of data or the identity of a peripheral
device; allows each device on a single communications line to respond to its
own message.
Adiabatic Expansion
The expansion of a gas, vapor, or liquid stream from a higher pressure to a
lower pressure in which there is no heat transfer between the gas, vapor, or
liquid and the surroundings.
Adsorption
The process of removing natural gas liquids from a stream of natural gas by
passing the natural gas through granular solids which have a natural attraction
to the liquids to be removed from the stream.
Aerial
A length of wire designed to transmit or receive radio waves. (See also
Antenna)
Aerosol Liquids
Minute liquid particles suspended in gas. Aerosols will behave like a fluid and
can be transported by pipes and pumping. When aerosols contact each other
they coalesce into droplets. Aerosols may be present in gas, or may be
generated by glow shearing off the skim inside of a pipeline.
AGA
American Gas Association. Trade group representing natural gas distributors
and pipelines.
AGA-10
American Gas Association Report No. 10, Speed of Sound in Natural Gas and
Other Related Hydrocarbon Gases. Method for calculation of the speed of
sound in gases.
AGA-3
American Gas Association Report No. 3, Orifice Metering of Natural Gas.
Method for calculating gas volume across an Orifice Plate. This method
requires two pressure readings, Differential Pressure (DP) and Static Pressure
(SP).
AGA-5
American Gas Association Report No. 5, Fuel Gas Energy Metering. Methods
(Volume, Mass or Energy) for calculating BTUs without knowing the
composition of the gas.
AGA-7
American Gas Association Report No. 7, Measurement of Gas by Turbine
Meters. Method for calculating gas volume using a Pulse Meter. This method
requires one pressure reading, Static Pressure (SP).
AGA-8
American Gas Association Report No. 8, Compressibility Factor of Natural Gas
and Related Hydrocarbon Gases. Method for calculating the Super
Compressibility Factor, Fpv.
AGA-9
American Gas Association Report No. 9, Measurement of Gas by Multipath
Ultrasonic Meters. Method for calculating gas based on transit-times.
AGC
Automatic Gain Control
AH
See Ampere-Hour.
AI Analog
Input
AIU
Analyzer Interface Unit.
Alkane
The simplest homologous series of saturated aliphatic hydrocarbons, consisting
of methane, ethane, propane, butane; also know as olefins. Unsaturated
hydrocarbons that contain one or more carbon-carbon double bonds.
Alkanolamine See
Amine.
Содержание XRC6490
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Страница 19: ...1 5 Standard Enclosure Cont RC 6790 X Figure 1 2 Model XRC6790 Continued on Next Page ...
Страница 20: ...1 6 Standard Enclosure Cont 18 00 15 52 RC 6890 X 28 81 15 52 28 00 20 09 18 70 Figure 1 3 Model XRC6890 ...
Страница 24: ...1 10 XRC 195 Board Specifications Cont Figure 1 5 Complete View XRC 195 Board Continued on Next Page ...
Страница 41: ...1 27 Totalflow Input Output Modules Cont Figure 1 16 XRC6990 Inside View ...
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Страница 56: ...2 14 AC Charging Unit Installation Cont Figure 2 12 DC Wiring Instructions Figure 2 13 AC Wiring Instructions ...
Страница 63: ...2 21 XRC Communication Jumper Settings and Field Wiring Cont Figure 2 19 Other Field Wiring I O Connections ...
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Страница 86: ...4 12 Replacing XRC 195 Board Cont Figure 4 5 XRC Board Connections ...
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Страница 112: ...5 24 12V Communication Supply Voltage Test Cont Figure 5 9 XRC 195 Communication Wiring ...
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