User's Manual

CENTRON® OpenWay™ Meter Technical Reference Guide 75
A
annunciator
A Liquid Crystal Display (LCD) label that is
displayed to identify a particular quantity being
displayed
B
baud
Unit of data transmission signaling speed, roughly
analogous to bits per second (bps)
D
display duration
The programmed number of seconds that a quantity is
displayed on the LCD before it is replaced with the
next quantity in the display sequence
E
EEPROM
Electrically Erasable Programmable Read Only
Memory. A memory chip that can only be erased by
an electrical signal (retains data during a power
outage)
electronic detent
An algorithm in firmware which restricts the device
to metering energy flow only to the customer
(unidirectional metering)
EPROM
Erasable Programmable Read Only Memory. Similar
to EEPROM except it requires ultraviolet light to be
erased
F
firmware
Computer programs stored in non-volatile memory
chips (ROMs, PROMs, EPROMs, EEPROMs, etc.)
fixed decimal
A display format that always retains the same number
of digits to the right of the decimal point
floating decimal
A display format that allows a maximum number of
digits to the right of the decimal, but can display any
number of digits to the right of the decimal equal to
or less than that number specified
I
IDM
Interval Data Message
L
LCD
Liquid Crystal Display
LED
Light-Emitting Diode
M
magnetic switch
A mechanical switch consisting of a thin metal
contact which is closed by an external magnetic field
N
nonvolatile memory
See EEPROM
R
RS-232
A communication media whereby information is
transmitted through a serial bit stream
Glossary of Terms
Draft