Functional principle
Functional principle
The CTU is a specially designed test stand for analyzing the surface
cleanliness of components.
These components are rinsed off in a clean environment using a test liquid
with a defined cleanliness. The particles carried by the test liquid are
collected on a membrane for subsequent analysis. The results provide
information on the type, size and mass of contamination.
Knowing what type of contamination is involved enables measurements to be
taken to prevent it (improved filtration, transportation, storage, etc.).
Manual spray extraction
Place the component to be analyzed in the analysis chamber (1).
After entering the required analysis parameters via the the user interface,
press the foot switch to pump the test liquid from reservoir B1 via the fine
filter, the 2/2 directional valve (Y81), and the spray gun with nozzle, into the
analysis chamber (1).
The operator has to make sure that the surfaces of the component to be
analyzed are evenly flushed.
The test liquid, (now called the analysis liquid) carrying some of the particles
washed off of the component, is sucked through the analysis membrane and
flows back into the reservoir B2. The vacuum is created by a vacuum nozzle
using the Venturi principle.
The level in the reservoirs B1 and B2 is constantly monitored using level
sensors. When the lower fill level is reached in one reservoir, switchover
automatically takes place between reservoir B1 and reservoir B2.
The quantity of test liquid in the analysis chamber (1) is determined by a flow
meter. Directional valve (Y81) is closed once the preset quantity has been
conveyed. Wait until the analysis fluid has been completely sucked through
the membrane. Then remove the analysis membrane and evaluate it.
CTU 1x3x Series
en(us)
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BeWa CTU1x3x 3631694d en-us 2017-03-13.docx
2017-03-13
