Operation manual ISOTEST 4 S / 4 S
p l u s
Page 7
A void is detected by sparking between the testing electrodes and the
electrically conductive carrier material as well as an acoustic and visual
alarm.
Voids and porosity with or without inclusions can be detected in
non-conducting material such as welded or glued seams.
Material types, e.g.
All types of plastic
Ceramic
Manufacturing types, e.g.
Foils
Plates
Enclosures
Pipelines
Hoses
The test object and the ISOTEST
®
test equipment are grounded by
applying the suitable coating of electrically conductive material.
Subsequently, a suitable testing electrode is moved in close distance to
the test object across the latter's entire surface. The test voltage applied
to the testing electrode is to be chosen according to the coating thickness
as well as the relevant standards and manufacturer specifications. A void
can be detected by sparking between the testing electrode and the
electrically conductive ground electrode, and is indicated by an acoustic
signal and a red LED on the membrane-switch front panel.
Among others, the following grounding methods can be applied:
Applying
electrically
conductive foils and fleeces
Applying
electrically conductive rubber mats
Filling with electrically conductive liquids or solid matters
Insertion of a metal wire
Missing or marginal grounding of the ISOTEST
®
test equipment
and/or test object may result in accidents and injury to persons.
Chapter "Grounding" contains a detailed description of all
possible grounding methods.
