analysette 22 „ECONOMY“ Page 7
FRITSCH
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CAUTION!
•
Never look into the laser beam!
•
Do not use reflecting objects near the laser beam.
•
For maintenance work at the exposed laser emitter, wear
suitable protective goggles (< 10 mW, 632.8 nm).
•
Devices equipped with laser emitters may only be oper-
ated by authorised personnel.
•
Prior to using the device, the operator must be fully fa-
miliar with possible risks in connection with laser emit-
ters.
•
Do not remove warning signs and instructions attached
to the unit.
The ultrasonic bath of the liquid dispersing unit is rated for
140 W. The PZT ultrasound transducer attached to the ul-
trasonic bath converts the supplied electrical power into
mechanical oscillations. Fritsch ultrasonic baths are de-
signed for liquids and a frequency of 35 kHz. In the proc-
ess, minute vacuums occur and implode (cavitation). The
cavitation leads to the disintegration of agglomerates.
Liquids contained solved gases (e.g. oxygen). Liquids that
have just been filled into the bath or substances that have
been in the bath for a prolonged period of time must be
treated with ultrasound for approx. 5 to 15 minutes prior to
processing. During this treatment, the gas is removed, and
the cavitation sound changes so that there are no loud
noises anymore after the degassing has been completed.
Low sound levels thus indicate that the degassing process
is near completion and are not a sign of insufficient ultra-
sonic power.
CAUTION!
•
Do not operate ultrasonic batch if it does not contain any
liquid.
•
Do not clean the ultrasonic bath with flammable liquids
(e.g. petroleum, solvents) or chemicals that contain or
release chlorine ions (e.g. disinfectants, commercial de-
tergents and washing-up liquids).
•
Do not use corrosive detergents (e.g. acids, salt solu-
tions).
•
Do not touch the cleaning solution while the ultrasonic
bath is cleaned.
•
The cleaning solution might be heated by continued op-
eration; therefore check temperature.
2.3 Operating
staff
•
The device may only be operated by authorised person-
nel. Maintenance and repair work must be carried out by
specifically trained technical staff.
•
Persons under the influence of medication, alcohol or il-
legal drugs, and persons suffering from illnesses or ex-
treme fatigue may not operate the machine.
