If
the
capacitance
value
becomes
negative
or
extremely
high,
or
the
dissipation
factor
(D)
increases
suddenly
,
place
the
16451B
so
that
the
surface
of
electrodes
are
vertical.
Then
adjust
the
Guarded/Guard
electrode
pressure
adjuster
.
Remove
the
plug
as
shown
in
Figure
3-25
and
turn
the
screw
in
the
pressure
adjuster
cw
to
strengthen
the
pressure
.
After
that
return
the
plug
and
redo
the
procedure
from
step
8.
Note
If
the
capacitance
value
measured
is
not
within
the
limits
shown
in
T
able
3-5
even
though
you
repeated
steps
7
and
8,
change
the
measured
capacitance
limits
of
T
able
3-5
to
the
limits
listed
in
the
following
table
and
repeat
steps
7
and
8.
Electrode
Capacitance
V
alue
Electrode-A
400
pF
to
700
pF
Electrode-B
7
pF
to
12
pF
3-44
Operation
Summary of Contents for 16451B
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