Agilent Technologies 16451B, Operation Manual

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g Gap between Guard electrode and Guarded electrode [m]
(refer to Figure 3-8, Figure 3-12 and Figure 3-16 )
d Diameter of Guarded electrode
t F or Contacting Electrode method, thickness of the test
material (=t
a
) [m].
F or Non-contacting Electrode method, gap between
Guarded/Guard electrode and Unguarded electrode (=t
g
) [m]
T able 3-10 lists the eective area constants
a
,
b
calculated for
Electrode-A ( 38 mm electrode) and Electrode-B ( 5 mm Electrode).
T o reduce the error caused by stray capacitance at the edge , divide
a
or
b
into equation to obtain dielectric constant as shown in following
equation
r
=
t
a
2 C
p
2
d
2
2
2
o
2
3-60 Operation