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4349B
Connect
capacitors
(C
b
)
with
a
value
of
about
500
pF
(100
to
1000
pF)
between
the
test
voltage
side
terminal
of
the
device
under
test
and
the
shield
of
the
triaxial
test
cable
to
bypass
the
contact
check
signal.
(When
Rs
is
greater
than
1
k.)
F
or
the
principle
of
operation
of
the
contact
check,
refer
to
Chapter
3
\Principle
of
Operation."
Insert
a
resistor
between
the
test
voltage
source
and
device
under
test.
This
resistor
is
for
limitting
the
current
and
reducing
the
voltage
source
noise
eect.
The
minimum
value
for
current
limit
is
calculated
as
follows:
Rs
=
T
est
V
oltage
/
Current
Limit
(F
or
details
about
reducing
the
voltage
source
noise
eect,
refer
to
\How
to
Reduce
the
Measurement
Error"
in
Chapter
6.)
Caution
Do
not
apply
a
dc
voltage
exceeding
6
50
V
or
6
50
mA
to
the
INPUT
terminals
,
or
the
4349B 's
input
circuits
will
be
destroyed.
Connect
a
current
limitting
resistor
between
the
test
voltage
source
and
device
under
test
to
avoid
the
over
current
when
a
shorted
device
is
connected.
The
series
resistance
value
should
be:
Rs
>
(
T
est
V
oltage[V]
/
0.05[A]
)
W
arning
The
measurement
system
using
the
4349B
and
the
external
voltage
source
may
output
dangerous
voltage
.
T
o
prevent
an
electrical
shock,
observe
the
following
safety
precautions
.
Agilent
T
echnologies
recommends
you
to
attach
the
safety
interlock
function
to
the
measurement
system
so
that
the
operators
can
not
touch
the
parts
where
dangerous
voltage
may
appear
.
If
not
possible
,
warn
the
operators
and
the
workers
around
the
measurement
system
not
to
touch
the
parts
.
Use
the
parts
with
the
safety
function
to
prevent
an
electrical
shock
caused
by
the
insulation
breakdown,
even
if
dangerous
voltage
does
not
appear
on
the
parts
directly
.
Turn
OFF
the
output
of
the
external
voltage
source
and
discharge
the
remanent
charge
of
the
DUT
thoroughly
,
before
touching
the
measurement
system
or
the
DUT
where
the
dangerous
voltage
may
appear
.
Use
the
power
cord
shipped
with
the
4349B
and
provide
an
uninterruptible
safety
earth
ground
to
the
instrument.
Do
not
apply
a
dc
voltage
exceeding
650
V
or
650
mA
to
the
INPUT
terminals
.
Agilent
T
echnologies
warrants
the
4349B
and
its
accessaries
provided
by
Agilent
T
echnologies
.
Agilent
T
echnologies
does
not
warrant
any
accidents
caused
by
trouble
in
an
external
voltage
source
or
the
measurement
system.
2-4
Operating
the
4349B
Содержание 4349B
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Страница 29: ...C Overload No Contact Operations Messages Instrument Errors Messages 2 GPIB Errors Messages 3 Index Contents 9 ...
Страница 42: ...4349B Figure 1 1 Power Cable Supplied 1 10 Getting Started ...
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Страница 173: ...4349B Figure 8 5 Current Measurement Additional Error Measurement Time 400 msec General Information 8 11 ...
Страница 176: ...4349B Figure 8 9 10 Additional Error Measurement Time 400 msec 8 14 General Information ...
Страница 210: ...4349B Figure B 1 Handler Interface Comparison Output Signals Diagram B 2 Handler Interface Installation ...
Страница 212: ...4349B Figure B 3 Handler Interface Input Signal Diagram B 4 Handler Interface Installation ...
Страница 216: ...4349B Figure B 4 A1 Main Board B 8 Handler Interface Installation ...
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