Printing History
The
Printing History shown below lists all Editions and
Updates
of
this manual
and
the
printing date(s).
The
first
printin~
of
the
manual
is Edition 1.
The
Edition
number
increments
by
1 whenever
the
manual is revised. Updates, which
are
issued between Editions, contain re-
placement pages
to
correct
the
current
Edition
of
the
manual.
Updates
are
numbered sequentially starting with
Update
1.
When
a new
Edition is created, it contains all
the
Update
information for
the
previous Edition. Each new Edition
or
Update
also includes a revised
copy
of
this printing history page. Many product updates
or
revisions
do
not
require manual changes and, conversely, manual corrections
may
be
done
without accompanying product changes. Therefore,
do
not
expect a one-to-one correspondence between product updates
and manual updates.
Edition 1
(part
Number
03245-90033)
............................
December
1991
Safety Symbols
Instruction
manual
symbol affixed
to
product. Indicates
that
the
user
must
refer
to
the
manual for specific Warning
or
Caution information
to
avoid personal
injury
or
damage
to
the
product.
Indicates
the
field wiring terminal
that
must
be
connected
to
earth
ground before
operating
the
equipment
-protects
against electrical shock in case
of
fault.
Frame
or
chassis ground
terminal-typi-
m
OR
J...
cally connects
to
the
equipment's metal
frame.
WARNINGS
i
WARNING
Alternating
current
(AC).
Direct current (DC).
Indicates hazardous voltages.
Calls attention
to
a procedure, p'ractice,
or
condition
that
could cause bodily injury
or
death.
C
AUTION
Calls attention
to
a procedure, p'ractice,
or
condition
that
could
pOSSibly
cause
damage
to
equipment
or
permanent
loss
of
data.
The
roUowing general safety
precautions
must
be
observed
during
all
phases
or
operation, service,
and
repair
or
this
product. Failure
to
comply
with
these
precautions
or
with
specinc
warnings elsewhere
In
this
manual
violates sarety
standards
or
design,
manufacture,
and
Intended
use
or
the
product. Hewlett-Packard
Company
assumes
no
liability ror
the
customer's
rallure
to
comply
with
these
re-
quirements.
Ground
the
equipment:
For
Safety
Qass
1 equipment (equipment having a protective
earth
terminal),
an
uninterruptible safety
earth
ground
mUst
be
provided from
the
mains power source
to
the
product input wiring terminals
or
supplied
power
cable.
DO
NOT
operate
the
product
In
an
explosive
atmosphere
or
In
the
presence
or
nammable
gases
or
rumes.
For
continued protection against fire, replace
the
line fuse(s) only with fuse(s)
of
the
same voltage
and
current rating
and
type.
DO
NOT
use repaired fuses
or
short-circuited fuseholders.
Keep away
rrom
Dve
circuits:
Operating
personnel must
not
remove equipment covers
or
shields. Procedures involving
the
removal
of
covers
or
shields
are
for
use
by
service-trained personnel only.
Under
certain conditions, dan$erous voltages may exist even with
the
equip-
ment switched off.
To
avoid dangerous electrical shock,
DO
NOT
perform
procedures involVing cover
or
shield removal unless you
are
qualified
to
do
so.
DO
NOT
operate
damaged
equipment:
Whenever it is possible
that
the safety protection features built into this
product
have
been
im-
paired,
either
through physical damage, excessive moisture,
or
any
other
reason,
REMOVE
POWER
and
do
not
use
the
product
until safe
operation can
be
verified
by
service-trained personnel.
If
necessary,
return
the
product
to
a Hewlett-Packard Sales
and
Service Office
for
service and
repair
to
ensure
that
safety features
are
maintained.
DO
NOT service
or
acijust alone:
Do
not
attempt
internal service
or
adjustment unless
another
person, capable
of
rendering first aid
and
resuscitation, is present.
DO
NOT
substitute
parts
or
modify
equipment:
Because
of
the
danger
of
introducing additional hazards,
do
not
install substitute
parts
or
perform any unauthorized modification
to
the
product.
Return
the
product
to
a Hewlett-Packard Sales and Service Office
for
service
and
repair
to
ensure
that
safety features
are
maintained.
iv
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