TotalFlow XRC6490, Руководство пользователя

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B-39
TERM DEFINITION
Remote Controller,
XSeries. Totalflow’s XSeries Remote Controller is a low power, microprocessor based
unit designed to meet a wide range of automation, monitor, control, alarming
and measurement applications.
Remote Terminal Unit An industrial data collection device similar to a PLC, designed for location at a
remote site, that communicates data to a host system by using telemetry (such
as radio, dial-up telephone, or leased lines).
Repeatability The ability of a transducer to reproduce output readings when the same
measurand value is applied to it consecutively, under the same conditions, and
in the same direction. Repeatability is expressed as the maximum difference
between output readings.
Residue Gas The portion of natural gas remaining in a gaseous state after recovery of certain
components through gas processing.
Resistance The measure of the ability of a material to pass a current.
Resistance Temperature
Characteristic
A relationship between a thermistor's resistance and the temperature.
Resistant Thermal Detector A metallic probe that measures temperature based upon its coefficient of
resistivity.
Resistor Passive component with a known resistance. The value of resistance is usually
shown by a set of colored bands on the body of the component.
Resolution The smallest significant number to which a measurement can be determined.
For example, a converter with 12-bit resolution can resolve 1 part in 4096.
Response Factor A calculated value determined by analyzing a known substance under precise
conditions (temperature, pressure, carrier flow rate) which equals the area of
the peak divided by the weight or volume of the injected substance. This
calculated value is then used as a response multiplier or offset for analyzing a
“sample” of this same substance from another source. In the case of Natural
gas, each component will have it’s own Response Factor.
Response Time 1) The length of time required for the output of a transducer to rise to a
specified percentage of its final value as a result of a step change of input. 2)
The time required by a sensor to reach 63.2% of a step change in temperature
under a specified set of conditions. Five time constants are required for the
sensor to stabilize at 600 of the step change value.
Restore This refers to a Totalflow procedure in which all the Station or Configuration
files are restored to the SDRIVE from the file located on the laptop. This
process is very helpful prior to doing a Cold Start when you want to continue
using the Configuration and Station files.
Reynolds Number The ratio of inertial and viscous forces in a fluid defined by the formula Re =
rVD/µ, where: r = Density of fluid, µ = Viscosity in centipoise (CP), V = Velocity,
and D = Inside diameter of pipe.
RFI See Radio Frequency Interference.
Ribbon Cable A flat cable in which the conductors are side by side rather than in a bundle.
Rich Gas Natural gas which, based on its content of liquefiable hydrocarbons, is suitable
for processing in a gas plant for recovery of plant products.
ROM See Read Only Memory
RRTS Communication abbreviation for Remote Ready To Send.
RS-232 See Recommended Standard 232.
RS-422 See Recommended Standard 422.
RS-485 See Recommended Standard 485.
RT See Runtime.
RTD See Resistant Temperature Detector.