Redesign and extension of the Coupling Measuring Tube Method (CoMeT)
for test of screening efficiency and transfer impedance on connectors.
Qualified tests of Corning Cabelcon connectors are vital for developments
of still better connectors with optimal performance. The test equipment,
the test methods and the test results must be under constant critical
And most important - the test results must always be compared to the
performance under real working conditions.
For the last one and a half years, our test engineers have been working
with the CoMeT equipment for the measurement of screening efficiency and
The CoMeT equipment was originally developed by Bedea in cooperation with
D.Sc.EE Lauri Halme from the Helsinki University of Technology*.
The equipment was developed for the measurement of cable performances. Our
test engineers have extended the equipment to make it work on connectors
too. One of the challenges has been to make it work as close as possible
to real working conditions.
This means that all circumstances
that might influence on the tests must be considered when the
interpretation and the conclusions are made.
Apart from special calculations and theoretical discussions behind the
project, the physical follow up has been impressive. New measuring tubes,
angular tubes, adapters and various fittings are among the necessary
changes and supplements to make the CoMeT method work on both cables and