Tektronix 492 Operator's Handbook

POWER
SOURCE
AND
POWER
REQUIREMENTS
The
492
is
designed to
operate
from a
single
-
phase
power
source
that
has one of
its
current
-
carrying
conduc
tors (
neutral
) at
ground
(
earth
)
potential
.
Operating
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
of a
110
220
volt
single
-
phase
,
three
- wire
system ) is
not
recommended
,
since
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
directly to
the
instrument
frame to
provide
electrical
shock
protection
.
If
the
unit
is
connected to
any
other
power
source
,
the
unit
frame
must be
connected to an
earth
ground .
Power
and
voltage
requirements
are printed on
a
back
panel
plate mounted
below the
power input jack .
The 492
can be
operated
from
either
a 115
Vac or
230 Vac
nominal
line
voltage with a
range
of 90
to 132 or
180 to 250
Vac , at
48 to
440 Hz . A
multipin (
harmonica
)
type
connector
on
2-2
the
power
supply
etched
circuit board can be
positioned
to
accommodate
either
voltage
range
.
When
the
power
supply
circuitry
is
changed
to
accommodate a
different
power
source
, the
information
plate
on the
back
panel
must
also
be
changed to
reflect
the
new
power re
quirements .
Refer
power
input
changes
to
qualified
service
personnel .
Instructions are
contained in
the
Service
Information
section
.
WARNING
Only
qualified
service
personnel
should
attempt
to
change the
power
input requirements .
Unfamiliarity
with
safety
procedures
can
result in
personal
injury
.
Refer
to
the
Safety
Summary at
the
front of this
manual
.
CONTROLS
,
INDICATORS
,
AND
CONNECTORS
The
following
describes the
function of
the
controls ,
indicators
,
and
connectors on
the front
and
rear
panels of
the 492.
Figures 2-1 and 2-2
illustrate their
locations
. All
options
are
covered in this
description and
some
functions
are
described
in
greater
depth
under
Operating Informa
tion
.
492 Operator's Handbook
(
8
)

Tektronix 492 Specifications

General

Brand	Tektronix
Model	492
Category	Measuring Instruments
Language	English