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4349B
Shielding
The
variation
in
total
current
as
seen
by
the
measurement
circuit
can
be
caused
by
power-line
pickup
,
adjacent
elds
of
excessive
strength,
exing
the
test
leads
beyond
reasonable
limits
,
or
while
changing
the
position
of
the
leads
relative
to
their
surroundings
.
Most
noise
problems
of
this
type
are
transient,
and
contribute
more
inconvenience
than
error
.
Any
suitable
shielded
enclosure
will
suce
to
reduce
unwanted
pick-up
.
Connect
the
shield
to
guard
(ground).
If
using
the
sensitive
measurement
ranges
,
lead
movement
or
operator
proximity
will
aect
the
stability
of
the
measurement
readings
,
stationary
leads
and
shielding
are
recommended.
7-2
Measurement
Basics
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 ...
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Страница 210: ...4349B Figure B 1 Handler Interface Comparison Output Signals Diagram B 2 Handler Interface Installation ...
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