TotalFlow XRC6490, Руководство пользователя

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B-18
TERM DEFINITION
Electrically Erasable
Programmable Read-Only
Memory ROM that can be erased with an electrical signal and reprogrammed. Also
referred to as the S Drive. It is a persistent drive that will not loose it’s memory
unless manually reprogrammed. Also called E
2
Prom. Totalflow’s XFC and XRC
have a Serial EEPROM on board, which generally holds registry, application
configuration and warranty information (non-volatile).
Electrode The site, area, or location at which electrochemical processes take place.
Electromagnetic
Compatibility Term used for European Union’s New Approach Directive 89/336/EEC which
means the device or system is able to function in its electromagnetic
environment without introducing intolerable electromagnetic disturbances to
anything in that environment.
Electromagnetic
Interference Any electromagnetic disturbance that interrupts, obstructs, or otherwise
degrades or limits the effective performance of electronics/electrical equipment.
It can be induced intentionally, as in some forms of electronic warfare, or
unintentionally, as a result of spurious emissions and responses,
intermodulation products, and the like.
Electronic Flow
Measurement Historically, flow measurement was tracked using a chart recording technology.
Developments in the field of electronics allowed for electronic measurement
devices to overtake the chart recording market. This field continues to develop
into peripheral markets, making the “Flow Meter” a valuable asset with multi-
tasking “Control” capabilities. Totalflow’s answer to this developing market is
the XSeries equipment.
EMC See Electromagnetic Compatibility
EMI See Electromagnetic Interference.
Emitter One terminal of a transistor.
EN Euro Norm (European Standard)
Enagas Spain’s Certification Board
Encoder A device that converts linear or rotary displacement into digital or pulse signals.
The most popular type of encoder is the optical encoder, which uses a rotating
disk with alternating opaque areas, a light source, and a photodetector.
Environmental Conditions All conditions in which a transducer may be exposed during shipping, storage,
handling, and operation.
EP Mix A liquefiable hydrocarbon product consisting primarily of ethane and propane.
EPROM See Erasable Programmable Read-Only Memory. The PROM can be erased
by ultraviolet light or electricity.
Erasable Programmable
Read-Only Memory ROM that can be erased using Ultraviolet Light. The EPROM maybe re-
programmed by removing the EPROM from the circuit and using special
equipment to write to it.
Ethane (C2H6) A colorless hydrocarbon gas of slight odor having a gross heating value of
1,773 Btu per cubic foot and a specific gravity of 1.0488. It is a normal
constituent of natural gas.
Ethylene (C2H4) A colorless unsaturated hydrocarbon gas of slight odor having a gross heating
value of 1,604 Btu per cubic foot and a specific gravity of 0.9740. It is usually
present in manufactured gas, constituting one of its elements and is very
flammable.
EU European Union. Formerly known as the European Community (EC). Members
of this union are replacing individual national regulations of member countries
with a series of Directives. These Directives are legislative instruments which
oblige member states to introduce them into their existing laws. These
directives harmonize a variety of existing practices, preserve the different legal
traditions and settle constraints for further developments.
Event Important incident: an occurrence, especially one that is particularly significant.