Quantum DX-Series User’s Guide
133
Glossary
B
Bit
The basic unit of data in a binary numbering system (
bi
nary digi
t
),
represented by a 0 or a 1. Eight bits equals one byte.
Byte
The basic unit of computer memory which is large enough to hold
one character.
C
Class A digital device
Class A equipment is intended for Commercial
installation.
Class I laser product
Class 1 lasers are products where the power of the
laser beam produced (the accessible emission) is always below the
Maximum Permissible Exposure value. Therefore, for Class 1 lasers the
output power is below the level at which it is believed eye damage will
occur. Exposure to the beam of a Class 1 laser will not result in eye injury.
Class 1 lasers may therefore be considered eye safe.
Class II laser product
Class 2 lasers are limited to a maximum output
power of 1 mW. A person receiving an eye exposure from a Class 2 laser,
either accidentally or as a result of someone else's deliberate action
(misuse) will be protected from injury by their natural blink reflex. This is
a natural involuntary response which causes the individual to blink and
avert their head thereby terminating the eye exposure.
