Coating - Omicron Lab SPECTANO 100 User Manual

SPECTANO 100 User Manual
Liquid Insulating materials
Edge capacitances are not the problem for the analysis of liquid insulating materials using a Disk
electrode arrangement with Guard ring. Nevertheless, stray capacitances of the test cell or between the
leads and to ground are influencing the measurement accuracy. We recommend performing the air
reference correction steps described in the solid insulating material analysis chapter "Solid insulating
materials" on the page before.
13.3.5

Coating

Coatings are used to improve the contact between electrode and material surface. The diameter d for the
calculation of the vacuum capacitance c
Table 13-2 Disk electrode with Guard ring using different coating types
Coating type
Sample diameter = Guard electrode diameter = Coating diameter
Guard electrode diamater = Coating diameter ≠ Sample diamater
Sample diameter = Measurement electrode diamater
Guard electrode diamater ≠ Coating diameter ≠ Sample diamater
Sample diameter ≠ Measurement electrode diamater
76
depends on the coating type.
0
Diameter d to enter in the
SPECTANO Analyzer Suite
d = Electrode diameter
d = Electrode diameter
d = Coating diameter