HP Lab Series User Manual

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LOAD LEAD
Figure
5-2.
Front
Panel
Terminal
Connections
the
measuring
device
at
A
will
result
in
a
measure-
ment
that
includes
the
resistance
of
the
leads
be-
tween
the
output
terminals
and
the
point
of
connec-
tion.
5-10 Voltage
Rated
Output
and
Meter
Accuracy.
Proceed
as
follows:
·
a.
Connect
load
resistor
across
rear
output
terminals
of
supply.
Resistor
value
is
800
ohms for
Model 6207B
or
3200
ohms for Model
62098.
b.
Connect
differential
voltmeter
across
+S
and
-s
terminals
of
supply
observing
correct
polar-
ity,
c.
Set
METER
switch
to
highest
voltage
range
and
turn
on
supply.
d.
Adjust
VOLTAGE
control
until
front
panel
meter
indicates
exactly
the
maximum
rated
output
voltage.
e.
Differential voltmeter
should
indicate
maximum
rated
output
voltage
within*
3%.
5-11 Load Regulation.
Definition: The
change
L!..EoUT
in
the
static
value
of
de
output
voltage
re-
sulting
from a change
in
load
resist-
ance
from
open
circuit
to
a
value
which
yields
maximum
rated
output
current
(or
vice
versa).
5-12 To check
the
constant
voltage
load
regulation,
proceed
as
follows:
a.
Connect
test
setup
shown
in
Figure
5-3.
b.
Turn
CURRENT
controls
fully
clockwise.
c.
Set
METER
switch
to
highest
current
range
and
turn
on
supply.
d.
Adjust
VOLTAGE
control
until
front
panel
meter
indicates
exactly
the
maximum
rated
output
voltage.
e.
Read
and
record
voltage
indicated
on
dif-
ferential
voltmeter.
f.
Disconnect
load
resistors.
g.
Reading
on
differential
voltmeter should
not
vary
from
reading
recorded
in
step
{e)
by more
than
the
following:
Model
No.
Variation
(mVdc)
62078
:l::34
G209B
:i:66
5-3
POWER
SUPPLY
UNDER
TEST
+
DIFFERENTIAL
VOLTMETER
Figure
5-3.
Load
R~gulation,
Constant
Voltage
5-13 Line
Regulation.
Definition:
The
change,
L!..EouT
in
the
static
value
of
de
output
voltage
resulting
from a
change
in
ac
input
voltage
over
the
specified
range
from
low
line
10%
less
than
nominal
to
high
line
10%
more
than
nominal
or
from
high
line
to
low
line.
5-14
To
check
the
line
regulation,
proceed
as
fol-
lows:
a.
Qonnect
variable
auto
transformer
.between
input power
source
and
power
supply
power
input.
b.
Turn
CURRENT
controls
fully
clockwise.
c.
Connect
test
setup
shown
in
Figure
5-3.
d.
Adjust
variable
auto
transformer
for
105V
ac
input.
e.
Set
METER
switch
to
highest
voltage
range
and
tum
on
supply.
f,
Adjust
VOLTAGE
control
until
front
panel
meter
indicates
exactly
the
maximum
rated
output
voltage. .
g.
Read
and
record
voltage
indicated
on
dif-
ferential voltmeter.
h. Adjust
variable
auto
transformer
for
125V
ac
input.
i.
Reading
on
differential
voltmeter
should
not vary from
reading
recorded
in
step
(g)
by
more
than
the
following:
Model No.
Variation
(mVdc)
5-15 Ripple and
Noise.
62078
:1:34
62098
:1::66
Definition: The
residual
ac
voltage
which
is
superimposed
on
the
de
output
of
a
regulated
power
supply.
Ripple
and
noise
may
be
specified
and
measured
in
terms
of
its
RMS
or
(preferably)
peak-to-
peak
value.

HP Lab Series Specifications

General

Brand	HP
Model	Lab Series
Category	Power Supply
Language	English