Elma TI-H 5 User manual

Elma GmbH & Co KG Kolpingstr. 1-7 D-78224 Singen Tel. [phone] / 882-0 Fax [phone] / 882-266 [e-mail]
Operating Instructions
Ultrasonic Cleaning Units
Transsonic TI-H
yenglish y
www.elma-germany.com

Content
2 BA/Transsonic TI-H_GB_0306 © Elma GmbH & Co KG
1General................................................................................3
2Important safety warnings ...................................................3
3Functioning..........................................................................4
4Product description..............................................................5
4.1 Product features ..........................................................5
4.2 CE conformity ..........................................................6
4.3 RFI declaration (European Union) ................................6
4.4 Delivered equipment .....................................................6
4.5 Additional accessories ..................................................6
4.6 Technical details ..........................................................7
4.7 Description of unit features – front view........................8
4.8 Description transducer tank ..........................................9
4.9 Description of unit features – back side ......................10
4.10 Description operating elements ...............................12
4.11 Safety devices ........................................................13
5Before initial operation.......................................................14
5.1 Unpacking and placement ..........................................14
5.2 Connect the unit to the mains .....................................14
6Putting into operation ........................................................15
6.1 Filling of the unit with cleaning liquid...........................15
6.2 Setting of the required cleaning liquid temperature ....16
6.3 Degassing of cleaning media
(multi-frequency units only).........................................17
6.4 Placement of cleaning items .......................................18
7Ultrasonic cleaning process ..............................................19
7.1 Setting of ultrasonic cleaning process ........................20
7.2 Setting of ultrasonic intensity ......................................20
7.3 Setting of ultrasonic frequency
(only on multi-frequency units)....................................20
7.4 Setting ultrasonic mode
(on multi-frequency units only)....................................21
7.5 After the cleaning ........................................................22
8Cleaning media .................................................................23
8.1 Limitations concerning solvent-containing cleaners....23
8.2 Limitations concerning aqueous cleaners...................24
9Maintenance......................................................................25
9.1 Maintenance / Care.....................................................25
9.2 Check the safety switch-off (on TI-H 25 and bigger)...26
9.3 Service life of the transducer tank...............................26
9.4 Repair ........................................................27
10 Putting out of action and waste disposal........................27
11 Manufacturer’s contact address .....................................27

General
© Elma GmbH & Co KG BA/ Transsonic TI-H_GB_0306 3
1 General
The present Operating Instructions are part of the delivered
equipment. They must be ready for use at any time and remain
with the unit in case of resale.
Carefully read the Operating Instructions before use of the unit
and operate the electric appliance according to the instructions.
We reserve the right to carry out technical modifications on the
unit due to advanced development.
Reprints, translations and copying of any kind, including of parts
of the document, must be authorized by the editor.
The copy right remains with the editor.
2 Important safety warnings
Read before initial operation!
The present Elma ultrasonic cleaning unit has been designed
for the ultrasonic treatment of items and samples of liquids
immersed in a cleaning bath.
It has not been designed for operation in areas with an
explosive ambient atmosphere.
Check the unit and the mains cable for transport damages. Do
not operate the unit if any damage is visible!
For safety reasons, the present unit must be connected to a
correctly grounded socket only. The technical details indicated
on the nameplate must correspond with the available mains
connections details, in particular those of the mains voltage and
current connected value.
The unit must be placed at a dry workplace; the workplace must
be sufficiently ventilated to allow the vapours from the cleaning
liquid to be carried off. Keep workplace, housing and operating
elements dry. Protect the unit from entering humidity!
The unit must be opened by authorized specialized personnel
only:
For purposes of filling, maintenance and care of the unit, in
case of suspected humidity inside the unit or in case of
malfunctions and after operation pull the mains plug.
The present unit must be operated with aqueous cleaning
liquids only.
Risk of fire and explosion! Do not use flammable liquids directly
in the cleaning bath.
Risk of burning and scalding! Depending on the duration of
operation, the surface of the unit, the cleaning liquid, the basket
and the cleaning items can heat up considerably.
Intended use
Check for damages
Mains connection
Placement
Prevention o
f
electrical accidents
Cleaning liquid
Hot surfaces and
liquid

Functioning
4BA/ Transsonic TI-H_GB_0306 © Elma GmbH & Co KG
Ultrasonic units can prioduce annoying sounds.
Wear personal ear protection devices when working close to an
ultrasonic unit which is operated without cover. This is
particularly recommendable for 25 kHz operation without cover.
Do not reach inside the cleaning liquid or touch sound-carrying
parts (tank, basket, cleaning items, etc.) during operation.
The manufacturer cannot be held liable for damages on
persons, equipment or cleaning items caused by improper use
and non-observance of the Operating Instructions.
The operator is responsible for the instruction of the operating
personnel.
Noise emission
Sound transmission
through physical
contact
Exclusion of liability
3 Functioning
Today, cleaning by ultrasound is the latest fine cleaning
method.
The electric high-frequency energy created by an ultrasonic
generator is transformed into mechanical energy by
piezoelectrical transducer systems and is then transmitted into
the bath.
This process creates millions of tiny vacuum bubbles, which
implode due to the variations of pressure caused by the
ultrasonic activity. Highly energetic liquid jets are created.
These jets remove dirt particles fom surfaces and even from the
smallest grooves and bores.
Basically, the cleaning result is determined by four factors:
Ultrasonic energy is probably the most efficient mechanic factor
in the cleaning process. This energy must be transmitted
through a liquid medium to the surfaces which are to be
cleaned.
Transsonic TI-H units are fitted with the innovative sweep
technology: through electronic oscillation of the sound field
(sweeping) the zones of low performance in the ultrasonic bath
are reduced.
For saponification and removal of the dirt particles a suitable
cleaning chemical is required. Elma has a large range of
cleaning media on offer.
Cleaning chemicals are also necessary to reduce the surface
tension of the liquid. This increases the efficiency of the
ultrasonic activity considerably.
The effect of the cleaning medium is improved by the optimum
temperature of the cleaning liquid.
The cleaning period depends on the degree and the kind of
contamination, on the cleaning chemical, on the temperature
and on the stage of the cleaning process.
Physical energy
Cleaning media
Temperature
Cleaning period

Product description
© Elma GmbH & Co KG BA/ Transsonic TI-H_GB_0306 5
4 Product description
4.1 Product features
Ultrasonic cleaning unit of industrial quality. Unit versions
available: multi-frequency technology (25/45 kHz or 35/130kHz)
or single frequency 35 kHz.
Further product features:
• transducer tank made of special cavitation-proof
stainless steel
• housing made of stainless steel
• sandwich-type performance transducer systems
• ultrasonic frequency variable by hand (on multi-
frequency units)
• Sweep function for a continuous shifting of the sound
pressure maxima; guarantees a homogeneous sound
field distribution in the bath,
on multi-frequency units the sweep function can be
switched on and off;
on single-frequency units the sweep function is
permanently switched on
• Degas function for the efficient degassing of the cleaning
liquid and for special laboratory applications, can be
switched on and off (only on multi-frequency units)
• manual stepless ultrasonic power regulation
• quick drain duct on the back of the unit
• temperature control
• dry run protected heating (TI-H 5 – TI-H 20)
• highly efficient direct heating (TI-H 25 – TI H 160)
• level monitoring on TI-H 25 – TI H 160 for the safety
switch-off of ultrasound and heating
• connection sockets for the optional connection of
external pump filter units (only on TI-H 25 – TI H 160)
• skimming ledge for the surface skimming of cleaning
residues (only on TI-H 25 – TI H 160)

Product description
6BA/ Transsonic TI-H_GB_0306 © Elma GmbH & Co KG
4.2 CE conformity
The present Elma ultrasonic unit is in compliance with the CE
marking criteria according to the EMC directive 89/336/EEC,
and the low voltage directive 73/23/EEC.
The declaration of conformity is available from the
manufacturer.
4.3 RFI declaration (European Union)
This is a product of class A.
For your information:
With a view to the radio interference elimination the present unit
has been permitted for the use in commercial areas.
In residential areas the unit may cause radio interference
radiations. In this case suitable measures for the elimination of
the interfering radiation must be taken. Please contact your
supplier or the manufacturer.
4.4 Delivered equipment
• Ultrasonic cleaning unit
• Operating Instructions
4.5 Additional accessories
• stainless-steel cover
• stainless-steel cleaning basket
• noise protections cover (TI-H 5 – TI-H 20)
• pump filter aggregate (connection socket available on TI-H
5 – TI-H 160)

Product description
© Elma GmbH & Co KG BA/ Transsonic TI-H_GB_0306 7
4.6 Technical details
Max. tank
volume
(approx.
liter)
Tank
service
volume
(approx.
liter)
Tank inner
dimensions
W x D x H
(approx. mm)
Unit outer
dimensions
W x D x H
(approx. mm)
Basket inner
dimensions
W x D x H
(approx. mm)
Weight
(approx.
kg)
TI-H 5 4.7 3.5 240x130x150 340x300x370 200x100x90 10,5
TI-H 10 10.8 8.6 300x240x150 400x415x370 260x210x85 14,8
TI-H 15 14.4 12.2 300x240x200 400x415x420 260x210x130 16
TI-H 20 19.8 16.8 330x300x200 430x470x420 290x270x130 20
TI-H 25 25.5 19.8 330x300x230 615x690x570 290x270x140 32
TI-H 55 57.8 45 500x300x350 620x850x570 255x460x210 35
TI-H 80 82.5 67.5 500x300x500 620x850x720 255x460x290 60
TI-H 115 115.5 90 600x500x350 840x1000x
570 450x545205 100
TI-H 160 160 135 600x500x500 840x1000x
720 440x540x350 140
Mains
connections
Ultrasonic
frequency
(kHz)
Power
consumption
total
(W)
Ultrasonic
power
effective
(W)
Ultrasonic
peak max* (W)
Heating
power (W)
TI-H 5 500 100 400 400
TI-H 10 1000 200 800 800
TI-H 15 1200 200 800 1000
TI-H 20 1650 250 1000 1400
TI-H 25
100-120V
or
200-240V
1 phase
1 N
1 PE
earthing
contact 1300 300 1200 1000
TI-H 55 3600 600 2400 3000
TI-H 80 4900 900 3600 4000
TI-H 115 7400 1400 5600 6000
TI-H 160
200-208V
or
380-400V
3 phasen
1 N
1 PE
earthing
contact
SF1 35 kHz
or
MF2
25/45 kHz
or
MF3
35/130 kHz
7600 1600 6400 6000
*Due to the form of the signal the value of the ultrasonic peak maximum is four times higher

Product description
8BA/ Transsonic TI-H_GB_0306 © Elma GmbH & Co KG
4.7 Description of unit features – front view
Illustration 4.7. TI-H 15
Stainless-steel transducer tank
Maximum filling level marking indicates the recommended
filling level maximum. This filling level should not be exceeded
even with the cleaning items immersed.
Plastic carrying handles for the safe transportation of the unit
even if the housing is hot.
Operating panel for the control of the unit functions
Description see section 4.10.
B
A
C
D
A
B
C
D

Product description
© Elma GmbH & Co KG BA/ Transsonic TI-H_GB_0306 9
4.8 Description transducer tank
The transducer tank is made of a special highly cavitation-proof
stainless steel, double welded at the edges (both on the inside
and on the outside).
In addition to the drain opening there are other openings in the
transducer tank (TI-H 25 – TI-H 160) that can be used for
• bottom scouring (drain) and supply to the circulating system
of the cleaning liquid, e.g. through a pump filter unit,
• for the installation of a cooling device in the cleaning liquid.
On the standard unit these openings are closed by screwed
caps.
The ultrasonic transducers are fitted under the transducer tank,
the heating is fitted to the side wall.
Illustration 4.8 View tank TI-H 25
Overflow (TI-H 25 – TI-H 160)
Level switch (TI-H 25 – TI-H 160)
Filling level marking for minimum level
Heating element inside the tank (TI-H 25 – TI-H 160)
Drain opening
E
D
B
A
C
A
B
C
D
E

Product description
10 BA/ Transsonic TI-H_GB_0306 © Elma GmbH & Co KG
4.9 Description of unit features – back side
Illustration 4.9.1 back view unit types TI-H 5 - TI-H 20
Illustration 4.9.2 back view unit types TI-H 25 - TI-H 160
AB
H
C D
E
F
H
G
B

Product description
© Elma GmbH & Co KG BA/ Transsonic TI-H_GB_0306 11
2-way ball valve ½“ (TI-H 5 – TI-H 25)
Mains supply cable:
1 phase earthing contact (TI-H 5 – TI-H 25)
3 phases threephase current (TI-H 55 – TI-H 160)
Connection for supply surface skimming (TI-H 25 – TI-H 160)
Connection drain overflow to a pump filter unit
(TI-H 25 – TI-H 160)
Cover plate (maintenance opening) for heating and float switch
(TI-H 25 – TI-H 160)
Connection supply for bottom scouring (TI-H 25 – TI-H 160)
3-way ball valve for drain / supply (TI-H 25 – TI-H 160)
Nameplate
A
B
C
D
E
F
G
H

Product description
12 BA/ Transsonic TI-H_GB_0306 © Elma GmbH & Co KG
4.10 Description operating elements
Illustration 4.10.1 Operating panel multi-frequency unit
Turning knob „ultrasonic time“ for the preselection of the
period of ultrasonic operation.
Available settings: 1-15 min for short period operation
permanent operation ∞(switch-off by hand required)
Turning knob „function“ for the selection of the ultrasonic
mode
(available on multi-frequency units only)
Sweep – continuous shifting of the sound pressure maxima,
allowing more homogeneous distribution of the sound field in
the liquid.
Degas – for degassing of fresh mixed cleaning liquids (single
half wave operation).
Normal – standard operation; the transducer system is operated
in double half wave mode.
Pilot lamp heating
Indicates operation of the heating system.
Turing knob „temperature“ for the preselection of the
required temperature of the liquid. Stepless regulation of the
temperature preselection for the heating of the cleaning liquid.
Turning knob „power“ for the stepless setting of the required
ultrasonic power: setting range 10 – 100 %.
Turning knob „frequency“ for the setting of the required
ultrasonic frequency (on multi-frequency units only)
Preselection of the required cleaning frequency (25 / 45 kHz or
35 / 130 kHz). This switch cannot be found on single frequency
units (SF 35 kHz).
Switch „heating“ (on / off) for switching the heating on and off.
Plastic cover class IP65 to protect against entering moisture.
B C D
A
E F G
A
B
C
D
E
F
G

Product description
© Elma GmbH & Co KG BA/ Transsonic TI-H_GB_0306 13
Illustration 4.10.2 Operating panel single-frequency unit
A D
C
E G
4.11 Safety devices
These units are fitted with heatings safe to run dry
These units are fitted with a level switch, which switches off
ultrasound and heating as soon as the liquid level goes below
the switch.
TI-H 5 – TI-H 20
TI-H 25 – TI-H 160

Before initial operation
14 BA/ Transsonic TI-H_GB_0306 © Elma GmbH & Co KG
5 Before initial operation
5.1 Unpacking and placement
If possible keep the original packing material for service
purposes.
Disposal must be in compliance with the valid regulations. You
can also return the packing material to the manufacturer or
supplier.
Check the unit for possible transport damages before initial
operation. In cas of visible damage do not operate the unit.
Contact your supplier and forwarding agent.
Place the unit on a solid, even and dry surface which is
resistant to possibly leaking cleaning liquid. Ensure that the
workplace is sufficiently ventilated!
Packing material
Check for transport
damages
Placement
Risk of electrocution due to humidity inside the unit!
Protect the unit from entering humidity.
The unit inside is splashwater-proof.
Keep workplace and housing dry in order to prevent electrical
accidents and damages on the unit.
CAUTION
For safe operation of the unit the following preconditions must
be guaranteed:
Ambient conditions
• Allowed ambient temperature during operation:
+5°C to +40°C
• Allowed relative humidity of air during operation: max. 80%
5.2 Connect the unit to the mains
TI-H 5 – TI-H 25: 1 phase (100 – 120 V or 220-240 V);
1 N; 1 PE protective earth.
TI-H 25 – TI-H 160: (200 – 208 V or 380 – 400 V)
3 phases 1 N; 1 PE protective earth.
Connect the unit to a grounded shockproof socket or a control
intended for this purpose.
Ensure that the values indicated on the nameplate of the unit
must correspond with the available connecting conditions.
Required mains
conditions
Connect mains cable

Putting into operation
© Elma GmbH & Co KG BA/ Transsonic TI-H_GB_0306 15
6 Putting into operation
6.1 Filling of the unit with cleaning liquid
Caution! For reasons of safety pull the mains plug when filling
the unit with cleaning liquid.
Shut the drain duct before filling the tank.
Fill the cleaning tank with a sufficient quantity of a suitable
cleaning liquid before switch-on.
TI-H 5 – TI H 20: Use the filling level marking inside the tank to
find the correct filling level.
TI-H 25 – TI H 160: The level switch must be covered with
liquid.
The optimum filling level is indicated by the upper edge of the
overflow.
If the cleaning liquid goes below a certain level the unit is
automatically switched off by the level switch. This prevents the
unit from running dry which might cause damage to the
material.
Use aqueous cleaning liquids only: ensure that the chosen
cleaning chemical is suitable for treatment in an ultrasonic bath
and observe the instructions on dosage and the compatibility of
the material.
All flammable cleaning media with a flash point lower than
indicated on page 1 of these Operating Instructions (see flash
point) must not be used in an ultrasonic bath. Observe the
safety warnings in section 8 (Cleaning liquids).
Pull the mains plug
Shut the drain
Observe filling level
Allowed cleaning
media
Prohibited cleaning
media
Risk of fire and explosion!
Never use flammable liquids, or solvents, directly in an
ultrasonic cleaning bath.
CAUTION
Ultrasonic activity increases the vapourization of liquids and
creates a very fine mist which can catch fire on any ignition
source.
Observe the instructions on limitations of use given in section
8.1.

Putting into operation
16 BA/ Transsonic TI-H_GB_0306 © Elma GmbH & Co KG
Risk of damage to the transducer tank!
Do not use any acid cleaning chemicals (pH value < 7) directly
in the stainless-steel tank if the cleaning items or the
contamination of the cleaning items contain halogenides
(fluorides, chlorides or bromides).
The same applies to NaCl solutions.
NOTE
The stainless-steel tank can be destroyed by crevice corrosion
in a very short time. Substances that cause crevice corrosion
can be contained in household cleaners.
Observe the instructions on the limitations of use given in
section 8.2.
For queries please contact the manufacturer or your supplier.
6.2 Setting of the required cleaning liquid temperature
Depending on the degree and kind of contamination and in
order to assist the cleaning effect it might be required to heat up
the cleaning liquid. For a quick heating-up process and in order
to prevent unnecessary energy losses we recommend to put a
cover on the tank.
The heating up process can be further accelerated by switching
on the ultrasound.
The ultrasonic energy is physically transformed into heat. Low
set temperature values can be exceeded during ultrasonic
operation.
In order to prevent the temperature to exceed the required
temperature accidentally due to the added ultrasonic energy,
set the temperature only to the value which is absolutely
necessary for the cleaning process.
High temperatures! Risk of burning and scalding!
Cleaning bath, transducer tank, cover, basket and cleaning
items can heat up considerably depending on the temperature
of the liquid.
Do not reach inside the bath!
Wear protective gloves when touching unit and basket!
CAUTION

Putting into operation
© Elma GmbH & Co KG BA/ Transsonic TI-H_GB_0306 17
1. Turn the „heating“ switch to „on“
(Illustration 4.10.1/2 G)
How to proceed
2. Set the required cleaning temperature at the turning knob
„temperature“ (Illustration 4.10.1/2 D). If the set temperature
is above the actual temperature, the heating operates. This
is indicated by the heating pilot lamp (Illustration 4.10.1/2
D).
3. As soon as the set temperature is reached the heating
automatically switches off, the pilot lamp is turned off.
In order to obtain an equally heated cleaning liquid it is
necessary to switch on the ultrasound or to stir the liquid from
time to time.
Without revolution of the liquid the created heat will only rise to
the surface. This would create big temperature differences in
the cleaning tank which lead to deviations of the actual
temperature from the set temperature of the cleaning bath.
6.3 Degassing of cleaning media
(multi-frequency units only)
Fresh mixed cleaning media are saturated with air depending
on the used chemical. This impedes the cleaning effect of the
ultrasound. By operating the degas function over a period of
several minutes before starting the cleaning process these tiny
inclusions of air can be removed from the cleaning medium.
Observe the safety warnings given in section 7 „Ultrasonic
cleaning process“ before switching on the ultrasound.
1. Turn the knob „function“ into „degas“ position (Illustration
4.10.1/2 D).
How to proceed
2. Set the temperature control to approx. 10 minutes.
The ultrasonic operation is started in the degas mode for the
set period of time.
We recommend to degas in 25 kHz or 35 kHz mode.
Degassing of the cleaning liquid can also be operated in
standard ultrasonic mode. The degas mode, however, is
quicker than the standard ultrasonic operation mode.

Putting into operation
18 BA/ Transsonic TI-H_GB_0306 © Elma GmbH & Co KG
6.4 Placement of cleaning items
Caution! The ultrasonic bath has been designed for the
ultrasonic treatment of items and liquids only. Do not clean
living beings or plants except when safely possible!
To not reach inside the tank during ultrasonic operation!
Cell walls, in particular in the sceletal and in joints, can be
damaged by prolonged ultrasonic acitivity.
NOTE
Do not place the cleaning items directly onto the bottom of the
transducer tank, as this might lead to damages on the unit.
Place the cleaning items in a stainless-steel cleaning basket
(accessory).
For the use of aqueous cleaning chemicals which might destroy
or damage the stainless-steel tank use a separate container.
For the special acid-resistant plastic tank please contact your
supplier.
The transducer tank is filled with an aqueous surface-active
agent in which the additional tank is inserted so that the liquid in
the tank operates as coupling medium for the ultrasonic activity.
No cleaning items on
the tank bottom
Use cleaning basket
Acid-resistant tank

Ultrasonic cleaning process
© Elma GmbH & Co KG BA/ Transsonic TI-H_GB_0306 19
7 Ultrasonic cleaning process
Please observe the following instructions before starting the
ultrasonic cleaning process.
Risk of scalding by hot surfaces and cleaning liquid!
Ultrasonic energy is physically transformed into heat.
The unit and the liquid in the tank heat up during ultrasonic
operation even with the heating switched off.
During permanent operation with cover temperatures exceeding
60°C can be reached.
During permanent operation with cover and heating
temperatures exceeding 80°C can be reached.
Do not reach inside the bath.
Wear protective gloves when touching unit and basket!
CAUTION
Ultrasonic units can produce annoying sounds.
Wear personal ear protection devices when working close to an
ultrasonic unit which is operated without cover.
NOTE
Ultrasonic energy is physically transformed into heat.
The unit and the cleaning liquid in the tank heat up during
ultrasonic operation even with the heating switched off. During
permanent operation with cover temperatures exceeding 60°C
can be reached.
For the cleaning of temperature-sensitive items please take the
heating up of the cleaning liquid into consideration.
NOTE
Sensitive surfaces can be damaged when exposed to
ultrasound over prolonged periods.
Ensure that sensitive surfaces are exposed to ultrasonic activity
for a suitable period only.
If in doubt check the cleaning progress regularly and observe
the state of the surface material.
NOTE
The operator is responsible for the inspection of the
cleaning result and the regular checking for possible
damages on the cleaning items during the cleaning
process.

Ultrasonic cleaning process
20 BA/ Transsonic TI-H_GB_0306 © Elma GmbH & Co KG
7.1 Setting of ultrasonic cleaning process
The ultrasonic acitivity is switched on by the turning knob
„ultrasonic time“ (Illustration 4.10.1/2 A).
For short period operation turn the knob to timer operation (1-15
min). The timer starts the ultrasonic operation and switches it
off after the set period of time has run down. If necessary, this
process can be repeated as often as required or be interrupted
before the set period has run down (turn to “off”).
For longer ultrasonic treatment periods turn the knob to the left
into the permanent operation position (∞). In this mode there is
no automatic switch-off. The operator must switch off the
ultrasonic operation by hand (turn to „off“).
Caution! The ultrasonic activity can heat up the medium during
permanent operation even without heating; in this process
temperatures exceeding the set temperature can be reached.
In order to avoid unnecessary heating of the cleaning medium,
in particular with low set temperatures, switch on the ultrasound
only during the cleaning stage (other than for degassing and for
revolution of the bath during heating up).
Timer operation
mode
Permanent operation
mode
7.2 Setting of ultrasonic intensity
For the treatment of sensitive surfaces the ultrasonic intensity
can be reduced. If in doubt, we recommend to carry out trial
cleaning processes with reduced ultrasonic activity.
The ultrasonic intensity can be controlled in a range between 10
– 100 % at the turning knob „power“ (Illustration 4.10.1/2 E).
The ultrasonic intensity can be changed during ultrasonic
operation.
7.3 Setting of ultrasonic frequency
(only on multi-frequency units)
The present unit can be operated with two different ultrasonic
frequencies.
The ultrasonic frequency can be set at the knob „freqency“
(Illustration 4.10.1 F). The following frequencies are available:
for the removal of coarse and tenacious contaminations and for
the precleaning of robust surfaces
for the fine cleaning and removal of contaminations from
sensitive surfaces
The frequency can be changed during ultrasonic operation.
25 kHz
45 kHz