HP Lab Series User Manual

2·17
INPUT
POWER
REQUIREMENTS
2-18
This
power
supply
may be
operated
from
either
a nominal 115 Volt
or
230
Volt,
48.;.S3Hz
power
souree.
The
unit,
as
shipped from
the
fac-
tory,
is
wiri!d
for
11
S Volt
operation.
The input
power
required
when
operated
from
a 115 Volt,
60
Hertz
power
source
at
full
load
is
60
Watts
and
"l.O
Ampere.
TRANSFORMER
PRIMARY
CONNECTED
FOR
115VOLT
OPERATION
TRANSFORMER
PRIMARY
CONNECTED
FOR
no
VOLT
OPERATION
NOTE:
CONNECTIONS
BETWEEN
50
UI
,
54
a
55,
ARE
llADE
WITH
COPPER
ON
THE
PRINTEI>
CIRCUIT
BOARD.
THESE
CONNECTIONS
MUST
BE
REMOVED
FOR
no
v
OPERATION.
THE
CONNECTIONS
ON
THE
PRINTED
CIRCUIT
BOARD
MUST
BE
BROKEN
AND
A
SEPARATE
EXTERNAL
CONNECTION
MADE
BETWEEN
POINTS
50
a
55.
Figure
2-4.
Primary
Connections
2-3
2-19
CONNECTIONS
FOR
230
VOLT
OPERATION
(Figure 2-4)
2-20
Normally,
the
two
primary windings
of
the
in-
put
transformer
are
connected
in
parallel
for
opera-
•
tion
from
llSV
source.
To
convert
the
power supply
to
operation
from a
230V
source,
the
power
trans-
former
windings
are
connected
in
series
as
follows:
a.
Unplug
the
line
cord
and
remove
top
and
bottom
covers
from
unit.
b.
Break
the
copper
between
54
and
55
and
also
between
50 and 51 on
the
printed
circuit
board.
These
are
shown
in
Figure
2-4
and are
labeled
on
copper
side
of
printed
circuit
board
and
on
schematic.·
c.
Add
strap
between
SO
and
55.
d.
Replace
existing
fuse
with
1 Ampere,
230-
Volt
fuse.
Return
unit
to
case
and
operate normally.
2-21
POWER
CABLE
2-22
To
protect
operating
personnel,
the
National
Electrical
Manufacturers'
Association
(NEMA)
recom-
mends
that
the
instrument
panel
and
cabinet
be
grounded.
This
instrument
is
equipped
with
a
three
conductor
power
cable
•.
The
third
conductor
is
the
ground
conductor
and
when
the
cable
is
plugged into
an
appropriate
receptacle,
the
instrument
is
grounded.
The
offset
pin
on
the
power
cable
three-prong
oon-
nector
is
the
ground
connection.
2-23
To
preserve
the
protection
feature
when
oper-
ating
the
instrument
from a
two-contact
outlet,
use
a
three-prong
to
two-prong
adapter
and
connect
the
green
lead
on
the
adapter
to
ground.
2-24
REPACKAGING
FOR
SHIPMEN]'
2-25
To
insure
safe
shipment
of
the
instrument,
it
is
recommended
that
the
package
designed
for
the
instrument
be
used.
The
original
packaging
material
is
reusable.
If
it
is
not
available,
~ont.act
your
local
Hewlett-Packard
field
office
to
obtain
the
materials.
This
office
will
also
furnish
the
address
of
the
near-
est
s~rvice
office
to
which
the
instrument
can
be
shipped.
Be
.!;µre
.to
atta~h
a:tag
to
the
instrument
which
specifies
the
owner, model number,
full
serial
number,
and
service
required,
or
a
brief
description
of
the
trouble.
•
•

HP Lab Series Specifications

General

Brand	HP
Model	Lab Series
Category	Power Supply
Language	English