HP Lab Series User Manual

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SECTION
Ill
OPERATING
INSTRUCTIONS
3-1
TURN.-ON
CHECK-OUT
PROCEDURE
Figure
3-1..
Front
Panel
Controls and
Indicators
3-2
The
following
procedure
describes
the
use
of
the
front
panel
controls
and
indicators
and
ensures
that
the
supply
is
operational
(see Figure
3-1):
a.
Set
AC
Power
Switch
(i)to
ON.
b.
Observe
that
Pilo~9nf@
goes
on.
c.
Set
Meter
Switch
~to
desired
voltage
range.
d.
Adjust
coarse
and
fine
Voltage Controls
©until
desired
output
voltage
is
indicated
on
Meter.
e,
Short
circuit
output
tenninals,
set
meter
switch
to
desired
cuirent
range
and
adjust
Current
Controls
®for
desired
output
current.
· ·
£.
Remove
short
and
connect
load
to
output
terminals
(Front
or
Rear).
3-3
OPERATING
MODES
3-4
The
power
supply
is
designed
so
that
its
mode
of
operation
can
be
selected
by making
strap-
ping
connections
between
particular
terminals on
the
terminal
strip
at
the
rear
of
the
power supply.
The
terminal
designations
are
stenciled
in
white on
the
power
supply
above
their
respective
terminals.
Although
the
strapping
patterns
illustrated
in
this
section
show
the
positive
tenninal
grounded,
the
operator
can
ground
either
terminal
or
operate
the
power
supply
up
to
300Vdc
off
ground
(floating)
••
The
following
paragraphs
describe
the
procedures for
utilizing
the
various
operational
capabilities
of
the
3-1
power supply. A more
theoritical
description
con-
cerning
the
operational
features
of
this
supply
is
contained
in
Application
Note 90
and
in
various
Tech.
Letters.
Copies
of
these
can
be
obtained
from your
local
Hewlett-Packard
field
office.
3-5
NORMAL
OPERATING
MODE
3-6
The power
supply
is
normally
shipped
with
its
rear
terminal
strapping
connections
arranged for
Constant
Voltage/Constant
Current,
local
sensing,
local
programming,
single
unit
mode of operation.
This
strapping
pattern
is
illustraM!d
in
Figure
3-2.
The
operator
selects
either
a
constant
voltage or a
constant
current
output
using
the
front
panel
con-
trols
(local programming, no
strapping
changes
are
necessary).
MONITORING
POINTS
Figure
3-2.
Nonnal
Strapping Pattern
3-7
CONSTANT
VOLTAGE
3-8
To
select
a
constant
voltage
output, proceed
as
follows:
a.
Turn-on power
supply
and
adjust
VOLTAGE
controls
for
desired
output
voltage
(output
terminals
open).
b.
Short
output
terminals
and
adjust
CURRENT
controls
for maximum
output
current
allowable
(cur-
rent
limit),
as
determined
by
load
conditions.
If a
load
change
causes
the
current
limit
to
be
exceeded,
the
power
supply
will
automatically
crossover
to
constant
current
output
at
the
preset
current limit
and
the
output
voltage
will
drop proportionately.
In
setting
the
current
limit,
allowance
must
be
made
for
high
peak
current
which
can
cause
unwanted.
cross-over.
(Refer
to
Paragraph
3-48.)

HP Lab Series Specifications

General

Brand	HP
Model	Lab Series
Category	Power Supply
Language	English