GE Hydran 201 i Instruction Manual page 295

Real-Time: Pertaining to a system or operating mode under which computation is
performed during the actual time when an external process occurs, instead of being
accumulated and processed at a later time. The computation results can therefore be used
to control, monitor, or respond in a timely manner to the external process.
Remote: A connection using modems between a Hydran 201i System and a host computer
through a public or private telephone system
Remote Site: Location of the Hydran 201Ti
Repeatability: The ability of an instrument to measure the same input to the same value
over a short period of time and over a narrow temperature range
Response Time: For a measuring instrument, designates the time between the application
of a step input signal and the indication of its magnitude within a rated accuracy. For a
sourcing instrument, designates the time between a programmed change and the avail-
ability of the value at its output terminals.
RFI: Radio-Frequency Interference
RMS: Root Mean Square
ROM: Read-Only Memory
RS-232: Specific type of port on the back of some computers, or peripherals such as
modems. It has 9 or 25 pins.
RS-232 Serial Communication Link: Cable that connects a Hydran 201i System to a host
computer
RS-485 Network Link: Cable that connects Hydran 201Ci Controllers together to form a
network
RTC: Real-Time Clock
RTD: Resistance Temperature Detector
RTU: Remote Terminal Unit
RTV: Room Temperature Vulcanization
Part 17997 Rev. 6, March 2011 I-9