User Manual

Cleaning media

BA/Elmasonic S/GB/020706 © Elma GmbH & Co KG

In compliance with the general regulations on the protection of

labour, certain limited volumes of flammable liquids (max. 1

litre) can be used in an ultrasonic cleaning unit under the

following conditions: these liquids must be filled into a suitable

separate vessel (e.g. beaker) with sufficient ventilation; this

vessel (beaker) can then be put into the stainless steel tank

which is filled with non-flammable liquid (water with a few drops

of interlacing agent).

Exception

8.2 Limitations on aqueous cleaners

Do not use aqueous cleaning media with pH values in the acid

range (pH < 7) directly in the ultrasonic tank if fluoride (F¯),

chloride (Cl¯) or bromide (Br¯) ions can be taken in by the

removed dirt or through the cleaning chemical. These can

destroy the stainless-steel tank by crevice corrosion within a

very short period of ultrasonic operation.

Other media which can destroy the stainless-steel tanks when

used in high concentrations or with high temperatures during

ultrasonic operation are: nitric acid, sulphuric acid, formic acid,

hydrofluoric acid (even diluted). (Completeness of list not

guaranteed.)

Risk of damage to the unit: do not use cleaning solutions

containing more than 0.5 mass % alkali (KOH and/or NaOH) in

an ultrasonic cleaning tank.

The above limitations for the use of chemicals in an ultrasonic

bath also apply for the aforementioned chemicals when these

are brought into an aqueous (particularly distilled water) bath

through entrainment or from the removed dirt.

For the ultrasonic treatment with the above mentioned media

use an acid-resistant tank (available as accessory equipment).

The limitations of use also apply to the standard cleaners and

disinfectants if these contain the above mentioned compounds.

Observe the safety warnings indicated by the manufacturer of

the chemicals (e.g. goggles, gloves, R and S phrases).

For queries please contact the manufacturer or your supplier.

Acids and alkaline

solutions

Entrainment o

chemical substances

Acid-resistant tank

Disinfectants

Safety regulations