47
SPECTANO Analyzer Suite
Cylindrical
electrodes
Other
Geometries
The following correction procedure applies to the
Cylindrical electrodes
. For
other geometries see “Reference measurement for other geometries” earlier in
this section.
In this case, only one reference measurement is to be performed. If you click the
Reference
button
on the ribbon, the capacitance results and thus the
permittivity
, tanδ and the impedance results of all measurements
, displayed in
the navigation pane, will be corrected according to the following formulas:
c
’
u
(air) =
c
’
meas.
(air) –
c
0
(air)
(Eq. 10-5)
c’
’u(air) =
c’
’meas.(air)
(Eq. 10-6)
c
’corrected(material) =
c
’meas.(material) –
c’
u(air)
(Eq. 10-7)
c’
’corrected(material) =
c’
’meas.(material) –
c’’
u(air)
(Eq. 10-8)
where
c
u is unknown stray capacitance.
The automated correction procedure is not available for “Other geometries”. To
determine the vacuum capacitance c
0
read chapter 13.8 "Other geometries”
“Vacuum capacitance c
0
and correction procedure”.
