Preparation For Use; Line Voltage Selection - Tektronix 465B Instruction Manual

Section
2—
465B
Service
OPERATING INSTRUCTIONS
This section
of
the
manual
provides information
on
instrument
installation
and power requirements
and
describes
the functions of controls,
connectors,
and
indicators. In addition,
it
includes
procedures intended
to familiarize
the
operator with obtaining basic oscilloscope displays For
more complete
operating information, refer to
465B/DM44
Operators
Manual
INSTALLATION
The 465 B
is
shipped
in its
carton with the standard
accessories
listed
on
the Accessories tab
page
at
the
end
ot this
manual
At
installation
time,
save tne snipping
carton
and packaging materials
for
repackaging. Refer to
the
Maintenance
section of this
manual
for
repackaging
information.
PREPARATION FOR USE
Safety
Considerations
This
instrument
may
be
damaged
it
operated
with
the Line Voltage Selector switch or the
Regulating
Range
Selector
bar
set for
the
wrong
applied
line
voltage or
if
the
wrong
line
fuse
is
used.
Refer
to
the Safety
Summary
in
the front of this
manual
for
power
source,
grounding,
and
other
safety
con-
siderations pertaining to
use
of
the instrument Before
connecting the instrument
to a
power
source, verify
that
the Line Voltage Selector switch
and the Regulating
Range
Selector bar are both
set for
the
line
voltage being
used, that
the proper
line
fuse
is installed,
and
that
the
line
cord plug
matches
the
power
source
to
be used
The 465B
is
designed
to be used with a three-wire ac
power system
If
a three-to-two wire adapter
is
used
to
connect
this
instrument
to a
two-wire ac power
system,
be
sure
to
connect the ground
lead
of
the adapter to earth
(ground). Failure to
complete
the
ground system
may
allow the chassis of
this
instrument
to
be elevated above
ground
potential,
thus posing a
shock
hazard.
Line Voltage Selection
WARNING
This instrument
is
designed
for
operation
from
a
power source with
its
neutral
at
or near earth
(ground) potential with a
separate
safety-earth
conductor.
This instrument operates
from
either a 115-volt or a
230-volt
nominal
line
voltage source
at
48 hertz to
440
hertz
To
convert the instrument for
operation
from one
line
voltage
range
to the
other,
move
the Line Voltage
Selector switch located
on
the
right
side panel
to
the
position indicating
the
correct
nominal voltage.
The power
cord plug
may
require replacement with a
type
matching
the
power
source
If
necessary,
changethe
line
cord plug Refer to
Table
2-1 for
power
cord conduc-
tor identification
and
to Figure
2-1 for
illustrations of
commonly-used power
plugs
Table 2-1
POWER CORD CONDUCTOR
IDENTIFICATION
Conductor Color
Alternate
Color
Ungrounded
(Line)
Brown
Black
Grounded
(Neutral)
Blue
White
Grounding
(Earthing)
Green-Yellow Green-Yellow
@ 2-1