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ROC827 Instruction Manual
Issued Mar-06 Glossary A-3
D (continued)
DVM
Digital voltmeter.
DVS
Dual-Variable Sensor. A device that provides static and differential pressure inputs to a
ROC.
E
EDS
Electronic Static Discharge.
EEPROM
Electrically Erasable Programmable Read-Only Memory, a form of permanent memory
on a ROC.
EFM
Electronic Flow Metering or Measurement.
EIA-232
(RS-232)
Serial Communications Protocol using three or more signal lines, intended for short
distances. Concerning RS232D and RS232C, the letters C or D refer to the physical
connector type. D specifies the RJ-11 connector where a C specifies a DB25 type
connector.
EIA-422
(RS-422)
Serial Communications Protocol using four signal lines.
EIA-485
(RS-485)
Serial Communications Protocol requiring only two signal lines. Can allow up to 32
devices to be connected together in a daisy-chained fashion.
EMF
Electro-Motive Force.
EMI
Electro-Magnetic Interference.
ESD
Electro-Static Discharge.
EU
Engineering Units. Units of measure, such as MCF/DAY.
F
FCC
Federal Communications Commission. See http://www.fcc.gov.
Firmware
Internal software that is factory-loaded into a form of ROM. In a ROC, the firmware
supplies the software used for gathering input data, converting raw input data values,
storing values, and providing control signals.
FlashPAC
module
ROM and RAM module for a ROC300-Series unit that contains the operating system,
applications firmware, and communications protocol.
Flash ROM
A type of read-only memory that can be electrically re-programmed. It is a form of
permanent memory (requires no backup power). Also called Flash memory.
FloBoss
A microprocess-based device that provides flow calculations, remote monitoring, and
remote control. A FloBoss is a type of ROC.
FM
Factory Mutual.
Force
Write an ON/OFF, True/False, or 1/0 value to a coil.
FPV
Compressibility Factor.
FSK
Frequency Shift Keypad.
FST
Function Sequence Table, a type of user-written program in a high-level language
designed by Emerson Process Management’s Flow Computer Division.
Ft
Foot or feet.
G
GFA
Ground Fault Analysis.
GND
Electrical ground, such as used by the ROC’s power supply.
GP
Gauge Pressure.