Ultrasonic Cleaning; Emptying The Tank - VWR T Series Operating Instructions Manual

Degassing can be speeded up by adding a few drops of a surface-active agent (e.g. washing-up liquid) to the
cleaning fluid.
Most ultrasonic cleaning agents already contain a surface-active agent.
The degassing process does not have to be repeated when reusing the cleaning liquid.
Heating the cleaning bath (TH, 'THD' und 'THD/HF' types only)
If a specified bath temperature is required for the cleaning operation, the cleaning bath can be heated up to a pre-
selected temperature (see process 'Setting the bath temperature'). Cleaning is normally considerably more effective if
the cleaning fluid is warmed up.
WARNING:
Consider the temperature tolerance of the material to be cleaned!
4.2.

Ultrasonic Cleaning

•
Immerse the items to be cleaned in the cleaning bath the distance of the items from the bottom must be at least
20 mm (0.8 inches).
If required, use the cleaning basket which is available as an accessory.
•
Set the required cleaning time, temperature and ultrasonic power for the cleaning process (if applicable).
The parameters 'required cleaning time' and 'ultrasonic power level' excessively depend on the cleaning fluid,
temperature, type and degree of soiling of the items requiring cleaning. The time can vary from a few seconds to
a few minutes.
The best combination of the parameters may have to be experimentally determined.
•
Start the cleaning process by switching on the ultrasonic energy.
•
After the cleaning process remove the items out of the liquid with suitable care. We recommend rinsing the parts
in clean water.
•
Disconnect the ultrasonic cleaning unit from mains if the unit is not needed.
WARNING:
Please note that the bath temperature rises considerably with duration of the ultrasonic operation.
For safety reasons the heater and the ultrasonic energy are switched off if the bath temperature
exceeds approx. 90degC (194F), an error message appears in the display.
Never put the items to be cleaned directly on the bottom of the tank.
Never clean too many items at once, the cleaning result can deteriorate.
4.3.

Emptying the tank

If the cleaning result becomes worse or if the cleaning liquid has got contaminated, the cleaning liquid should be
replaced.
Prior to any emptying or cleaning the unit must be disconnected from mains.
For this purpose the units USC 900, USC 1200, USC 1700, USC 2100 and USC 2600 have a drain on the rear side
of the unit.
0160.8131 / 141219
Operation
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