How do I test the ultrasonic efficiency of my ultrasonic cleaner?
The recommended is aluminium foil test.
What is ultrasonics, and how does it work?
Ultrasound is sound energy whose frequency is above the normal human hearing range. In an ultrasonic cleaner, ultrasonic energy is transmitted to the cleaning solution via a bank of transducers attached to the machine's tank. At sufficient ultrasonic power levels, tiny regions of vacuum often called cavitation bubbles form in the liquid as the peak sound wave expansion passes. These bubbles implode almost immediately, creating localised microscopic high-pressure jets and shock waves within the liquid which can dislodge foreign particles from the surface of any articles placed in the tank.
What solutions should I use for surgical and dental instruments?
Use only a neutral or low alkaline detergent. It must be low foaming as there is a risk that foam may settle on the instruments when being removed from the machine. Do not use detergents containing chlorides or any corrosive chemicals that will corrode the tank. Be aware that excess amounts of certain chemical additives will not support ultrasonic cavitations. Check with your manufacturer or supplier if in doubt.
How often do I need to change water?
When the water is heavily contaminated or visibly clouded, it should be immediately replaced. Replacement of the cleaning solution is necessary at least daily (where the machine is used daily) or more frequently, depending on how many what types of parts are being cleaned in your ultrasonic cleaner. If the solution is excessively contaminated, it will cause a loss of ultrasonic cleaning power and possible damage to your machine.
Can I put my hands into the water when my ultrasonic cleaner is activated?
As part of the occupational health and safety, no part of the operator's body should be submerged into the water during operation as the ultrasonic energy is enough to cause damage to joint tissues and result in long-term arthritic conditions.
Why should I use a basket/tray?
Dropping in heavy/sharp/hard parts into the tank can damage your ultrasonic cleaner.You should use a basket/tray in order to prevent damage to the transducers and also protect the tank from scratching. Do not use baskets, trays, racks etc. fabricated from heavy and dense material (including soft material e.g. rubber, wood and fabric) as they will absorb ultrasonic energy and affect the cleaning effectiveness.
How do I clean my ultrasonic cleaner?
Use an appropriate suitable stainless steel cleaning powder if the tank is stained with marks. If the outer sealing compound is marked, wipe over with general purpose cleaner. If a scratch has occurred in the tank, use the finest available sandpaper and carefully polish out the scratch. Clean the tank regularly. After use, rinse out the tank and wipe dry.
Sarah Lockbaum RPN, CDE, IIWCC
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