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Technical data
13.4 DSH 100 (Dielectric Sample Holder)
OMICRON Lab’s
DSH 100
is a Disk electrode test cell with Guard ring and is designed for the analysis of
solid insulating materials.
The
SPECTANO Analyzer Suite
offers a
DSH 100
test cell selection with pre-defined dimensions. Thus,
you only have to enter the material type for documentation and the reference and material sample
thickness for the automated calculation of the vacuum capacitance c
0
and out of this the relative
permi
ttivity ε
r
.
Depending on the international standard, it might be necessary to select the test cell
‘Other geometries’.
•
For more information see 13.2.3 "Test cell type selection in SPECTANO Analyzer Suite”.
•
For more information about the stray capacitance correction see chapter “13.2.4 Correction
•
For more information about coating see chapter “13.2.5 Coating”.
13.5 Disk electrode without Guard ring
13.5.1 IEC standards
According to the IEC standards for the analysis of dielectric and resistive properties of solid and liquid
insulating materials
•
IEC 60250-1969: AC methods for solid material analysis
•
IEC 60247-2004: AC methods for liquid insulating material analysis
•
IEC 62631-3-1-2017-03: DC methods for solid material analysis
you can use a Disk electrode without Guard ring for DC method or AC method analysis.
IEC 60250-1969 is replaced by IEC 62632-2-1-2018-2. The following table describes the differences
between these two standards:
Table
0
13-3
3
Differences between IEC 60250-1969 and IEC 62632-2-1-2018-02
IEC 60250-1969
IEC 62632-2-1-2018-02
Frequency
range
15Hz to 300MHz
0.1Hz to 10MHz
Test cell
types
Disk electrode with Guard ring
Disk electrode without Guard ring
Cylindrical electrode with Guard ring
Cylindrical electrode without Guard ring
etc.
Disk electrode with
Guard ring
In comparison to IEC 60250, the latest IEC standards for AC methods, such as IEC 62632-2-1-2018-02
base on the demands on different frequency ranges.
Thus, for AC methods with frequencies < 10 MHz it is recommended to use Disk electrodes with Guard
ring to ensure a measurement accuracy as defined in the international standard documents.
