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electronic GmbH & Co. KG • Heinrichstraße 3-4 • 12207 Berlin • Deutschland • [email protected]
Conducting the foil test
1. Fill 2/3 of the oscillating tank with water + 1 % suitable concentrate (99 parts water
+ 1 part concentrate), see chapter 4.1
.
2.
Degas the
fl
uid
3.
Fill the inset beakers with the same
fl
uid, hang them
inside the ultrasonic bath and also degas them for approx.
5 minutes.
4. Switch
o
ff
the ultrasound.
5. Cut the aluminium foil (household foil with a thickness of
10
μ
m to 25
μ
m) into small squares or rectangles, so they
fi
t in the inset beakers.
Next, immerse one piece aluminium foil in each inset
beaker.
6. Switch on the ultrasound and irradiate the foil for at least
one minute until a visible perforation or holes are produced.
With sturdier foils (thicker or coated ones), the irradiation time can last up to 3 minutes.
7. Switch
o
ff
the ultrasound, remove the foil and allow to dry - note/jot down the position
of the individual foils in the beakers.
8. The foil must be perforated (see picture), otherwise contact the
manufacturer.
9. Label the foils accordingly with the position of the inset beaker,
duration and date, and then archive.
10. After the test, the inset beakers must be thoroughly rinsed out to
remove any detached
foil particles.
11. Check the oscillating tank for foil residue, if necessary replace
all of the liquid and rinse the system, see chapters 4.4 and
6.3.2.1.
Inset beaker
Aluminium foil, must
be immersed
Fill level in the
inset beaker
Sample foil after a test in
one inset beaker.