B-41
TERM DEFINITION
Sensor File
The Sensor File contains all the setup/calibration information of the unit. The
Sensor File is a (.dat) file and by default is named after the base serial number
proceeded by an "s", such as s00108.dat. Although the name can be
overwritten, it is recommended that the default name be kept.
Serial I/O
A common form of data transmission, in which the bits of each character are
sent one at a time over the line.
Serial Port
A communications interface that uses one data line to transfer data bits
sequentially. On the IBM PC the serial port refers to a standard asynchronous
serial interface which uses the 8250/16450/16550 family of UART's.
Service Life
The period of useful life (usually in hours or minutes) of a primary cell/battery
before a predetermined cut-off voltage is reached.
Set Point
The temperature at which a controller is set to control a system.
Set-Point
A "level" or control point in a feedback system.
SFC
Sequential Function Chart (IEC supported programming language)
SG
Acronym for Specific Gravity.
Short Circuit
A connection of comparatively low resistance accidentally or intentionally made
between points on a circuit between which the resistance is normally much
greater. Also called a "bridge" or "short" such as when solder from two tracks
touch on a PC board.
Shrinkage
The reduction in volume and/or heating value of a natural gas stream due to
extraction or removal of some of its components.
SIG See
Signal.
Signal
Any communication between message-based devices consisting of a write to a
signal register.
Signal Generator
A circuit that produces a variable and controllable signal.
Signed Integer
Can represent a number half the size of a “unsigned integer”, including a
negative number.
Sink
Device such as a load that consumes power or conducts away heat.
Skip Days
Extra Daily records for recording events that require the start of a new day. i.e.
Volume Reset, Backward Time change over the hour, and Contract Hour
change.
SNAM
Italy’s Certification Board
SNR
Signal to Noise Ratio.
SoftCONTROL Softing’s
IEC
compiler environment
Softing
Maker and distributor of the IEC compiler softCONTROL
Software
The non-physical parts of a computer system that include computer programs
such as the operating system, high-level languages, applications programs, etc.
Solar cell
A cell that produces current under sunlight.
Solenoid
A coil of wire that is long compared to its diameter, through which a current will
flow and produce a magnetic flux to push or pull a rod (called an armature).
SOS
See Speed of Sound.
Sour Gas
Natural gas that has a high concentration of H2S.
Source
Device that provides signal power or energy to a load.
SP
See Static Pressure
Span
The difference between the upper and lower limits of a range expressed in the
same units as the range.
Summary of Contents for XRC6490
Page 1: ...2100802 001 AB TOTALFLOW XSeries Remote Controller User s Manual ...
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Page 19: ...1 5 Standard Enclosure Cont RC 6790 X Figure 1 2 Model XRC6790 Continued on Next Page ...
Page 41: ...1 27 Totalflow Input Output Modules Cont Figure 1 16 XRC6990 Inside View ...
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Page 86: ...4 12 Replacing XRC 195 Board Cont Figure 4 5 XRC Board Connections ...
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Page 112: ...5 24 12V Communication Supply Voltage Test Cont Figure 5 9 XRC 195 Communication Wiring ...
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