96047 First Edition Glossary-1
This glossary defines new or special terms
and abbreviations found in this manual.
A
A Ampere.
AC Alternating current.
APC American Power Conversion
Corporation.
B
Btu British thermal unit. A standard measure
of a device’s heat output. The amount of heat
required to raise one pound of water one
degree Fahrenheit.
C
C Celsius or Centigrade. A unit of measure
for temperature.
cm Centimeter. A unit of measure for length
or distance.
CRC Customer Resource Center.
CSS Customer Support Services.
D
dBA Adjusted decibels (dB).
decibel (dB) One tenth of a bel. A unit of
measure for relative power.
E
electrostatic discharge (ESD) An
undesirable discharge of an accumulated
electrical charge (static) that can severely
damage delicate equipment and degrade
electrical circuitry.
ESD See electrostatic discharge.
Ethernet A 10 Mb/s baseband local area
network that allows multiple stations to
access the transmission medium at will
without prior coordination, avoids contention
by using carrier sense and deference, and
resolves contention by using collision
detection and transmission. Ethernet uses
carrier sense multiple access with collision
detection.
F
F Fahrenheit. A unit of measure for
temperature.
H
Hertz A unit of frequency equal to one cycle
per second. For example, in the United
States, power line frequency is 60 Hz, or a
change in voltage polarity 120 times per
second.
HTTP Hypertext transfer protocol.
Hz See Hertz.
I
in. Inch. A unit of measure for length or
distance.
J
Joule A unit of energy or work, equal to the
work done when the application point of a
one newton force moves one meter in the
direction of application.
K
kg Kilogram.