TotalFlow XRC6490, Руководство пользователя

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B-47
TERM DEFINITION
Wheatstone Bridge Circuit design using two TCDs to measure components in chromatography.
WINCCU Windows Central Collection Unit. Windows version of software to process,
archive and manipulate data collected from the Totalflow products.
Window In computer graphics, a defined area in a system not bounded by any limits;
unlimited "space" in graphics.
Witness In the field, where hydrocarbons are changing hands and actual cash register
transactions being performed, it is not uncommon for one party or the other to
request / require a representative or company employee be present during
calibrations and or routine maintenance. Often this arrangement is contractually
linked.
Wobbe Index Calculated from the energy content, or a higher heating value of the gas, and
the relative density of the gas (Btu/RD
1/2
).
Wobbe Number A number proportional to the heat input to a burner at constant pressure. In
British practice, it is the gross heating value of a gas divided by the square root
of its gravity. Widely used in Europe, together with a measured or calculated
flame speed, to determine interchangeability of fuel gases.
Working Voltage The highest voltage that should be applied to a product in normal use, normally
well under the breakdown voltage for safety margin. See also Breakdown
Voltage.
World Wide Web
An Internet service facilitating access to electronic information - also known as
the Web, WWW, or W3.
Write To record data in a storage device or on a data medium.
XDCR See External Transducer.
XFC See Flow Computer, XSeries.
XFC-195 Board The main electronic board used in XSeries flow computers. The XFC-195
Board mounts on the inside of the enclosure’s front door.
XFC6200EX Totalflow’s Class 1 Div 1 Flow Computer. This Totalflow Flow Computer is
housed in an explosion proof housing and has similar operational features as
the
µ
FLO, with additional capabilities.
XIMV See XSeries Integral Multivariable Transducer.
XMV See Multivariable Transducer.
XRC XSeries Remote Controller. Also see Remote Controller, XSeries.
XSeries Totalflow’s new extendable equipment series featuring technology that is
expandable and flexible for ever changing needs.
XSeries Integral
Multivariable Abbreviated XIMV. A smart Multivariable Transducer that is an integral part of
the XSeries Flow Computer, measuring Static Pressure (SP), Differential
Pressure (DP) and Flowing Temperature (Tf). This refers to both the transducer
portion of the device and the circuitry required to supply measurements to the
Main Processor Board, which is housed in a factory sealed unit. See
Multivariable Transducer for more information.
Y Expansion factor.
Zero Gas Gas at atmospheric pressure.
Zero Offset The difference expressed in degrees between true zero and an indication given
by a measuring instrument.