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Installation
-
494A/494Ap
Servlce,
Vol.
1
CONNECTING
POWER
Power
Source
and
power
Requirements
o
a
o
I
a
a
o
o
O
a
o
a
o
I
I
o
o
o
t
o
a
o
o
o
o
O
o
o
o
o
o
O
o
o
a
o
o
o
o
o
o
o
)
a
g-2
Changing
the powef
input
can
be
dangerous.
o
Work
safely
o
Know
the intended
power
source
o
Set
the
instrument
for
the
power
source
o
Check
the
fuse
for
proper
ratings
.
Use
the
power
cord
and
plug
intended
for
the
power
source
The
spectrum
analyzer
operates
from
a
single_
phase
power
source
that
has one
of
its
curent-carrying
conductors
(neutral)
at
ground
(earth)
potentiat.
Oo-no-t
operate
the spectrum
analyzer
from power
sources
where
both
current-carrying
conductors
are
isolated
or
above ground
potential
(such
as
phase-to_phase
on
a
multi-phase
system
or
across
the legs
ot
a
fiA-220
y
single-phase,
three-wire
system).
tn
tms
method
of
operation,
only
the
line
conductor
has
over_current
(fuse) protection
within
the
unit.
Refer
to
the
Safety
summary
at
the
front
of
this
manual.
The
ac
power
connector
is a
three_wire,
polarized
plug
with
the
ground
(earth)
lead connected
direcfly
to
the instrument
frame
to
provide
electrical
shock
proiec-
tion. lf
th€
unit
is connected
to
any
other
power
source,
connect
the unit
frame
to
an
earth
ground-
Operate the
spectrum
analyzer
from
Either
11S Vac
or 230
Vac nominal
line
voltage
with
a range
of
90 to
132
or
180
to
250
Vac,
at 4g
to 440
Hz.
power
and
vol_
tage requirements
are printed
on
a
back_panel plate
mounted
below
the
power
input
jack.
tnput power
requirements
are
changed
with
a
switch
on
the
back
panel
(see
Figure
3-1)
and
by
replacing
the
input
line
fuse.
The
instrument
uses
a 4A
fast
blow
fuse
for
115 Vac
operation,
and a
2A
slow
blow
fuse for
230
Vac operation.
Remove
the
protective
cover
and
set
the line
select
switch
for
the appropriate
voltage
range.
Figure 3-1.
Input
power
selector
switch
and fuse.
Remove
the fuse
holder and replace
the
line
fuse
with
the
appropriate
fuse for the voltage
range selected.
The international power
cord
and
plug
configuration
is
shown in
the
Options section of
this manual.
STORAGE AND
REPACKAGING
Storage
Short Term (less
than
90
days)
-
For
short
term
storage,
store
the
instrum€nt in
an environment
that
meets
the non-operating
environmental
specitications
in
Section
2 of
this manual.
o
o
o
o
o
o
o
o
o
o
o
o
o
0
335
O
3s3
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
WATTS
([AXl
210
AMPS
3.2 AT
1'ls Y
60
Hr
FREO
a!
TO
i|'.o
X!
FANGE
90-132 V
o@
CAUTION
FIRE
FUI
OilLY
WITH
250 Y aA
r POWER
IEFORE NI
tE
:AST
FUSe.