Cleaning Liquids - Sonoswiss DURA T 12/H Mode D'emploi

6.8 After cleaning
Post-treatment of cleaned items Typically, the cleaned items need to be rinsed and dried after the cleaning process is complete.
The rinsing liquid(s) to be used during the rinsing stage depend(s) both on the cleaning liquid and on the required degree of cleanness
of the parts. In certain cases, it makes sense to use ultrasound operation also for rinsing.
Emptying unit Drain the liquid from the unit as soon as it is so polluted that it does not achieve an adequate cleaning effect any more, or if the unit will
not be used for a longer period of time (certain types of residue and pollution can damage the stainless-steel tank). Use the drain to empty out the cleaning
tank. To facilitate draining, the floor of the ultrasonic tank slopes towards the drain.
Cleaning the ultrasonic tank For information on how to clean the empty ultrasonic tank, refer to chapter 9.1, Maintenance and care
.

7 CLEANING LIQUIDS

When choosing the cleaning agent, it is very important to pay attention to its suitability for ultrasonic baths.
Otherwise, the ultrasonic tank could be damaged or, in the worst case, operating personnel could be injured.
7.1 Restrictions concerning cleaning agents containing solvents
Flammable liquids, such as solvents, must never be used directly in the ultrasonic cleaning tank.
There is a risk of fire and explosion!
Danger
Observe the hazard information in chapter 6.1.
i
Ultrasound increases the evaporation of the liquids and forms very fine mist which can ignite at ignition sources at any time.
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7.1 Restrictions concerning cleaning agents containing solvents
Explosive substances and flammable solvents
• marked according to EC Directives with symbols and R-phrases R 1 to R 9
• or E, F+, F,O or R 10, R 11 or R 12 for flammable substances must not be introduced into the stainless-steel tank of the ultrasonic unit
and exposed to ultrasonic irradiation.
Exception In accordance with the general occupational health and safety regulations, limited volumes of flammable liquids (max. 1 litre) can be exposed to
ultrasonic irradiation in an ultrasonic unit if the following conditions are met: If, with adequate external ventilation, these liquids are introduced in a separate
container (e.g. beaker) into the stainless-steel tank that is filled with a non-flammable liquid (water with a few drops of
detergent). If in doubt, contact the manufacturer or supplier.
7.2 Restrictions concerning aqueous cleaning agents
Do not use aqueous cleaning media in the acidic range (pH value below 7) directly in the stainless-steel tank if fluoride (F), chloride (Cl) or bromide (Br)
ions will be introduced from the dirt on the items being cleaned or from the cleaning agent. These will quickly destroy the stainless steel tank in ultrasonic
operation due to pitting corrosion.
Acids Other media that can corrode and destroy the stainless-steel tanks when used in high concentrations and/or at high temperatures during ultrasonic
operation include (but are not limited to): e.g. nitric acid, sulphuric acid, formic acid, hydrofluoric acid (even when diluted).
Exam- • Treatment with hydrochloric acid or hydrofluoric acid, or acid solution salts
ples
• Removal of fluxing agents containing fluoride, chloride or tetrafluoroborate from soldered metal parts or electronic components
• Decalcifying, in a solution containing citric acid, medical systems contaminated with, amongst others, physiological saline solution
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