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Lambda LP Series - Operating Procedures - Series Connection; Series Connection - Constant Voltage Steps; Series Connection - Constant Current

Lambda LP Series
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desired
total
current
limit
for
the
combination.
If
rio
intermediate
current
limit
is
re-
-quired,
turn
the
controls
of
each
unit
CW
to
the
position
for
full
current
rating
for
the
maximum
ambient
temperature
of
operation.
Refer
to
section
on
Specification
and
Features.
6.
Apply AC
power
to
the
supplies.
7.
Place
power
ON-OFF
switches
of
both
units
in
ON
position
and
check
that
red
power
ON
indicators
are
lit.
8.
Check
that
output
current*
and
output
voltage
meters
indicate
desired
values;
total
voltage
is
equal
to
sum
of
output
voltage
of
both
units~
As
required,
adjust
OUTPUT
VOLTAGE
control
knobs
and
CURRENT
LIMITER
controls
of
the
units
to
obtain
correct
indications.
For
non-metered
models
use
externally
connected
meters
and
check
that
correct
meter
indications
exist
at
output
terminals
of
both
units;
positive(+)
terminal
6 of
unit
(1)
and
minus
(-)
terminal
4
of
unit
(2)
are
the
output
terminals
of
the
series
combin-
ation.
*Ammeter
indicates
a
nominal
5
milliamperes
offset
from
zero,
which
is
the
sensing
divider
current
and
not
load
current.
For
load
current
use
the
5
rna.
point
as
zero
point.
Use
front
panel
jacks
(+)
of
unit
(1)
and
(
-)
of
unit
(2)
to
make
output
voltage
check
for
the
series
combination.
For
remote
sensing
connection,
make
checks
at
the
load
terminations
of
sensing
leads
from
terminal
7
of
unit
(1)
and
from
terminal
3
of
unit
(2).
9.
Power
supplies
are
now
in
proper
operation
•
.
....--
.
;,Series
Connection
Constant
Current
Operation,
With
Voltage
Limit
..
1.
Remove
AC
power
input
to
both
units
and
place
power
ON-OFF
switches
in
OFF
position
before
connecting
load
to
the
supplies
0
2.
Determine
load
requirements,
select
wire
size
from
figures
1
and
2
and
make
supply-load
connections
shown
in
figure
7 A.
Refer
to
paragraph
on
Connections
for
Series
Operation.
3.
Select
diodes
CR1
and
CR2
as
instructed
in
Connections
for
Series
Operation
paragraph.
4.
Turn
CURRENT
LIMITER
controls
of
each
unit
to
the
desired
setting.
5.
When
load
voltage
must
be
limited
to
an
intermediate
value
within
the
voltage
rating
of
the
series
combination,
turn
the
OUTPUT
VOLTAGE
control
knobs
to
a
position
for
total
intermediate
voltage
required
for
the
combination.
Total
voltage
is
the
sum
6f
the
voltage
settings
of
each
unit.
If
no
intermediate
voltage
limit
is
required,
turn
the
controls
to
the
full
CW
position
to
obtain
voltage
limit
at
the
maximum
combined
ratings
of
the
supplies.
6.
Apply AC
power
to
the
supplies.
7.
Place
power
ON-OFF
switches
of
both
units
to
ON
position
and
check
that
red
,..--
..._,
power
ON
indicators
are
lit.
IM-LP400
12
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