CENTRON® Polyphase Meter Technical Reference Guide
99
Glossary of Terms
A
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
annunciator
A Liquid Crystal Display (LCD) label that is
displayed to identify a particular quantity being
displayed
L
B
LCD
baud
Liquid Crystal Display
Unit of data transmission signalling speed, roughly
analogous to bits per second (bps)
LED
D
Light-Emitting Diode
M
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
magnetic reed switch
A mechanical switch consisting of a thin metal
contact which is closed by an external magnetic field
E
N
EEPROM
nonvolatile memory
Electrically Erasable Programmable Read Only
Memory. A memory chip that can only be erased by
an electrical signal (retains data during a power
outage)
See EEPROM
R
RS-232
electronic detent
A communication media whereby information is
transmitted through a serial bit stream
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
