7
Troubleshootin
g
Guide
Belo
w
there
are
s
ome
f
requently
asked
questions
an
d
an
swers.
P
lease
c
heck
if an
y
apply
t
o
you
r
powe
r s
upply
b
efore
c
ontacting
B
&K
P
recision.
General
Q: I cannot power up the power supply.
-
Check
that t
he
po
wer
c
or
d i
s
s
ecurely
c
onnected
to
the
A
C
i
npu
t a
nd
t
here
i
s
l
ive
po
wer
fro
m y
ou
r
electrical
AC o
utlet.
-
Verify
tha
t
the
A
C
p
ower
c
oming
from
t
he
m
ains
contains
the
c
orrect
v
oltage.
T
he
powe
r
supply
c
a
n a
ccep
t a s
pecific
r
ange
of
A
C
i
npu
t v
oltages.
R
efer
to s
ectio
n
2.1.
Q: How do I set up the supply to run in constant current mode?
-
The
s
upply
is a C
V/CC
p
owe
r s
upply
t
hat
au
tomatically
c
rosses
o
ve
r
from
CV
t
o
C
C
upon
a
load
w
hich
d
raws
c
urrent
at t
he
c
urrent
limit
(I-SET).
T
herefore,
it
is
de
pendent
o
n
t
he
load.
F
o
r e
xample,
if I
-SET
is c
onfigured
as 1 A,
the
lo
ad
mu
st
draw
1 A
before
the
s
upply
w
ill g
o
in
to
C
C
mo
de.
Q: Why is my display voltage lower than the voltage I set?
-
Thi
s is
often
be
cause
of
the
r
esistances
fr
om
t
he
t
es
t l
eads/wires
c
onnecte
d b
etween
t
he
supply
and
t
he
DUT
(
device
un
der
test),
w
hic
h c
auses
a dr
op
in v
oltage.
T
o
m
inimize
this
drop,
us
e
r
emote
s
ense
t
erminals
to
c
ompensate
a
nd
outp
ut
a
m
ore
a
ccurate
v
oltage
to
the
DU
T.
Q: I cannot set voltage at the maximum rating.
-
This
may
b
e
t
hat
t
he
set
v
oltage
is
outside
of
the
v
oltage
maximu
m
limit.
R
efe
r t
o
Limit
Voltage
Pr
otection
(LVP)
sectio
n
to
v
erify
an
d
c
onfigure
t
he
lim
its.
Remote Control
Q: I am trying to send the commands over RS232 using the TTL to USB serial adapter IT-
E132B, but the power supply does not seem to respond.
-
Check
that y
ou
a
re
s
ending
A
SCII
s
trings
t
hat
are
t
erminated
w
ith
a C
R
(
carriage
re
turn)
and
L
F
(
linefeed)
c
haracter.
-
Fo
r R
S-232,
c
heck
that
the
ba
ud
rate,
pa
rity,
data
bits,
s
top
bi
t,
a
nd
fl
ow
c
ontrol
s
ettings
matc
h w
it
h
the
s
ettings
c
onfigured
on t
he
s
oftware
i
nterface.
www.
GlobalTestSupply
.com
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