Keysight Technologies 16452A - Capacitive Measurement Method; Correction Coefficient

34 Keysight 16452A Liquid Test Fixture
Operation
Data Processing- Calculate Dielectric Parameter from Measurement Data
3-
Where,
Relative dielectric constant
Dielectric loss
The 16452A and Keysight impedance analyzer/LCR meter use the “Capacitive
Method” for obtaining relative permittivity by measuring the capacitance of a
material that is sandwiched between parallel electrodes.
Capacitive Measurement Method
The dielectric coefficient ( ) and loss ( ) can be calculated from the
capacitance and electrode dimensions.
(Where, the conductivity , A is area of electrode, t is gap between
electrodes.)
The dielectric constant of a vacuum (
o
) is calculated from the capacitance of
the vacuum (Approximately equal to air capacitance C
0
).
Therefore, the equation (2) can be rewritten in the same form as equation (1),
when =1
.
Correction Coefficient
The measured data (C
p
, C
o
) contains the stray capacitance, which alters by the
dielectric constant.
'
r
''
r
'
r
''
r
'
r
tC
p

A 
o

---------------
=
''
r


o

---------------
=

t
AR
p

----------------
=

o
tC
o

A
--------------
=