HP 1740A - Safety Summary; Electrical Safety Precautions; Operational Hazard Warnings; Instrument Modification and Repair Safety

SAFETY SUMMARY
The
following
general
safety
precautions
must
be
observed
during
all
phases
of
operation,
service,
and
repair
of
this
instrument.
Failure
to
comply
with
these
precautions
or
with
specific
warnings
elsewhere
in
this
manual
violates
safety
standards
of
design,
manufacture,
and
intended
use
of
the
instrument.
Hewlett-Packard
Company
assumes
no
liability
for
the
customer's
failure
to
comply
with
these
requirements.
GROUND THE INSTRUMENT.
To
minimize
shock
hazard,
the
instrument
chassis
and
cabinet
must
be
connected
to
an
electrical
ground.
The
instrument
is
equipped
with
a
three-conductor
ac
power
cable.
The
power
cable
must
either
be
plugged
into
an
approved
three-contact
electrical
outlet
or
used
with
a
three-contact
to
two-contact
adapter
with
the
grounding
wire
(green)
firmly
connected
to
an
electrical
ground
(safety
ground)
at
the
power
outlet.
The
power
jack
and
mating
plug
of
the
power
cable
meet
International
Electrotechnical
Commission
(IEC)
safety
standards.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE.
Do
not
operate
the
instrument
in
the
presence
of
flammable
gases
or
fumes.
Operation
of
any
electrical
instrument
in
such
an
environment
constitutes
a
definite
safety
hazard.
KEEP AWAY FROM LIVE CIRCUITS.
Operating
personnel
must
not
remove
instrument
covers.
Component
replacement
and_
internal
adjustments
must
be
made
by
qualified
maintenance
personnel.
Do
not
replace
components
with
power
cable
connected.
Under
certain
conditions,
dangerous
voltages
may
exist
even
with
the
power
cable
removed.
To
avoid
injuries,
always
disconnect
power
and
discharge
circuits
before
touching
them.
DO NOT SERVICE OR ADJUST ALONE.
Do
not
attempt
internal
service
or
adjustment
unless
another
person,
capable
of
rendering
first
aid
and
resuscitation,
is
present.
USE CAUTION WHEN EXPOSING OR HANDLING THE CRT.
Breakage
of
the
Cathode-ray
Tube
(CRT)
causes
a
high-velocity
scattering
of
glass
fragments
(implosion).
To
prevent
CRT
implosion,
avoid
rough
handling
or
jarring
of
the
instrument.
Handling
of
the
CRT
shall
be
done
only
by
qualified
maintenance
personnel
using
approved
safety
mask
and
gloves.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT.
Because
of
the
danger
of
introducing
additional
hazards,
do
not
install
substitute
parts
or
perform
any
unauthorized
modification
to
the
instrument.
Return
the
instrument
to
a
Hewlett-Packard
Sales
and
Service
Office
for
service
and
repair
to
ensure
that
safety
features
are
maintained.
DANGEROUS PROCEDURE WARNINGS.
Warnings,
such
as
the
example
below,
precede
potentially
dangerous
procedures
throughout
this
manual.
Instructions
contained
in
the
warnings
must
be
followed.
Dangerous
voltages,
capable
of
causing
death,
are
present
in
this
instrument.
Use
extreme
caution
when
handling,
testing,
and
adjusting.
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