TotalFlow XRC6490, Руководство пользователя

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B-43
TERM DEFINITION
Supervisory Control and
Data Acquisition A common PC function in process control applications, where programmable
logic controllers (PLCs) perform control functions but are monitored and
supervised by a PC.
Surge A sudden change (usually an increase) in the voltage on a power line. A surge
is similar to a spike, but is of longer duration.
SV Sample Vent (located on NGC8200 series Feed-Through Assembly).
SW VBATT Switched Battery Voltage. Cycles power to equipment to save power.
Switch An electrical device for connecting and disconnecting power to a circuit, having
two states, on (closed) or off (open). Ideally having zero impedance when
closed and infinite impedance when open.
Synchronous (1) Hardware - A property of an event that is synchronized to a reference clock.
(2) Software - A property of a function that begins an operation and returns only
when the operation is complete.
Syntax Comparable to the grammar of a human language, syntax is the set of rules
used for forming statements in a particular programming language.
System Noise A measure of the amount of noise seen by an analog circuit or an ADC when
the analog inputs are grounded.
TankMaster Totalflow Control System for LevelMaster Tank Units.
Tap
To cut threads in a round hole so that other fittings or equipment can be
screwed into the hole. Also to make an opening in a vessel or pipe.
TBUS Communication abbreviation for Transmit Bus.
TCD See Thermal Conductivity Detector.
TCP/IP TCP/IP – This is the basic communication format for the Internet, and for much
of what happens on a corporate network. Virtually all networked PCs and other
computers have an “IP address” having the format xxx.xxx.xxx.xxx (xxx can
range from 0 to 255 in most cases). You can see the ip address of your PC by
going to the start menu, selecting run, and entering cmd. A “DOS Box” will be
displayed on your screen. Type ipconfig to get the ip address. When you enter
a URL (e.g., www.totalflow.com) in a browser, a DNS server (on the network)
resolves this into an IP address and directs your request to the machine with
that address.
TCR Temperature Compensated Regulator.
TDS32
Totalflow DDE Server that allows Microsoft Windows applications with DDE
capabilities to communicate with Totalflow’s equipment. For example data can
be retrieved and placed in an Excel spreadsheet.
Temperature Coefficient An experimental number used to modify the calibration of a device (Totalflow
transducer) to account for changes in environmental temperature.
Temperature Error The maximum change in output, at any measurand value within the specified
range, when the transducer temperature is changed from room temperature to
specified temperature extremes.
Temperature Range,
Compensated The range of ambient temperatures within which all tolerances specified for
Thermal Zero Shift and Thermal Sensitivity Shift are applicable (temperature
error).
Temperature, Ambient The temperature of the air, atmosphere or other fluid that completely surrounds
the apparatus, equipment or the work piece under consideration. For devices
which do not generate heat, this temperature is the same as the temperature of
the medium at the point of device location when the device is not present. For
devices which do generate heat, this temperature is the temperature of the
medium surrounding the device when the device is present and generating
heat. Allowable ambient-temperature limits are based on the assumption that
the device in question is not exposed to significant radiant-energy sources such
as sunlight or heated surfaces.