HP 6296A - Page 35

5-12
CONSTANT
VOLTAGE
TESTS
5-13
Rated
Output
and
Meter
Accuracy.
5-14
Voltage. Proceed
as
follows:
a.
Connect
load
resistor
across
rear
output
terminals
of
supply.
Resistor
value
to
be
as
follows:
Model
6282A
628SA
6286A
6290A
6291A 6296A
Res.
1"'.
4A
~
llA
~
20~
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
controls
until
front
panel
meter
indicates
exactly
the maximum
rated
output
voltage.
e.
Differential
voltmeter
should
indicate
maximum
rated
output
voltage
within
:t2%.
5-15
Current.
Proceed
as
follows:
a.
Connect
test
setup
shown
in
Figure
5-4,
leaving
switch
S
l
open.
b.
Tum
CURRENT
controls
fully
clockwise.
c.
Set
METER
switch
to
highest
current
range
and
turn
on
supply.
d.
Adjust
VOLTAGE
controls
until
front
panel
m~ter
indicates
exactly
the
maximum
rated
output
current.
e.
Differential
voltmeter
should
read
1.
0
z
O.
02 Vdc.
POWER
Sll~Pl.Y
UNDER
TEST
0.
90
l.
8
1.
9
ll
?.
8
19 66
CURRCNT
SAM
PUNG
RESISTOR
OIFrtllENTlAL
VOL?MCTER
Figure·
5-4.
Output
Current
Test
Setup
S-16
Load
Regulation.
To
check
constant
voltage
load
regulation,
proceed
as
follows:
a.
Connect
test
setup
as
shown
in
Figure
5-5.
b. Turn
CURRENT
controls
fully
clockwise.
c.
Set
METER
switch
to
highest
current
range
and
turn
on
supply.
S-4
POWER
SUPPLY
UNDER
?£ST
MODEL NO. I
R
6281A 0. 20
6282A
0.
JO
6284A
0.
l3
6285A 0.
20
6286A
0.
10
6289A
0.
66
6290A 0.
33
6291A
0. 20
6294A
I.
0
6296A
0. 33
6299A
I.
33
OtrrtRENTIAL
VOLTMETER
R
I.
30
0. 90
6
3.
80
I.
90
zi
13
7.
80
59
19.
66
131
Figure
S-5.
Load
Regulation,
Constant
Voltc:1ge
d.
Adjust
VOLTAGE
controls
until
front
panel
meter
indicates
exactly
the
maximum
rated
output
voltage.
e.
Read
and
record
voltage
indicated
on
differential
voltmeter.
f.
Disconnect
load
resistors·.
•
g.
Reading
on
differential
voltmeter
should
•
not
vary
from
reading
recorded
in
step
e by more
than
the
following
(variations
expressed
in
mV"dc):
Model
6282A 6285A 6286A
6290A
6291A
64!96A
Variation
:t2
:3
:1:3
:1:5
:5
:t7
NOTE
If
measurements
are
made
at
the
front
terminals,
readings
will
be
O.SmV
per
amp
greater
due
to
front
terminal
re-
sistance.
5-17
Line
Regulation.
l'o
check
the
line
regulla-
tion,
proceed
as
follows:
a.
Connect
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
s-s.
d.
Adjust
variable
auto
transformer for
105
VAC
input.
e.
Set
METER
switch
to
highest
voltage
range
and
turn
on
supply.
f.
Adjust
VOLTAGE
controls
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
transforn:ier
for
l.25
VAC
input.