Operating Instructions

CB Chemie & Biotechologie GmbH
Operating Instructions
Ultrasonic Cleaning Units
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Content
2
1
General................................................................................3
2
Important safety warnings ...................................................3
3
Functioning..........................................................................4
4
Product 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
5
Before initial operation.......................................................14
5.1 Unpacking and placement ..........................................14
5.2 Connect the unit to the mains .....................................14
6
Putting 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
7
Ultrasonic 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
8
Cleaning media .................................................................23
8.1 Limitations concerning solvent-containing cleaners....23
8.2 Limitations concerning aqueous cleaners...................24
9
Maintenance......................................................................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
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!
Intended use
Check for damages
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!
Mains connection
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.
Placement
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!
Prevention of
electrical accidents
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.
Cleaning liquid
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.
Hot surfaces and
liquid
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.
3
Functioning
Noise emission
Sound transmission
through physical
contact
Exclusion of liability
3
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.
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:
Physical energy
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.
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.
Cleaning media
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.
Temperature
Cleaning period
4
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.
Product description
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 multifrequency 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)
5
Product description
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
4.5
6
Delivered equipment
•
Ultrasonic cleaning unit
•
Operating Instructions
Additional accessories
•
stainless-steel cover
•
stainless-steel cleaning basket
•
noise protections cover
•
pump filter aggregate (connection socket available on
Product description
4.6
Technical details
Max. tank
volume
(approx.
liter)
Tank
service
volume
(approx.
liter)
Tank inner
dimensions
WxDxH
(approx. mm)
Unit outer
dimensions
WxDxH
(approx. mm)
Basket inner
dimensions
WxDxH
(approx. mm)
Weight
(approx.
kg)
4.7
3.5
240x130x150
340x300x370
200x100x90
10,5
10.8
8.6
300x240x150
400x415x370
260x210x85
14,8
14.4
12.2
300x240x200
400x415x420
260x210x130
16
19.8
16.8
330x300x200
430x470x420
290x270x130
20
25.5
19.8
330x300x230
615x690x570
290x270x140
32
57.8
45
500x300x350
620x850x570
255x460x210
35
82.5
67.5
500x300x500
620x850x720
255x460x290
60
115.5
90
600x500x350
840x1000x
570
450x545205
100
160
135
600x500x500
840x1000x
720
440x540x350
140
Mains
connections
Ultrasonic
frequency
(kHz)
Power
consumption
total
(W)
Ultrasonic
power
effective
(W)
500
100
400
400
1000
200
800
800
1200
200
800
1000
1650
250
1000
1400
1300
300
1200
1000
or
3600
600
2400
3000
MF3
35/130 kHz
4900
900
3600
4000
7400
1400
5600
6000
7600
1600
6400
6000
100-120V
or
200-240V
1 phase
1N
1 PE
earthing
contact
200-208V
or
380-400V
3 phasen
1N
1 PE
earthing
contact
SF1 35 kHz
Ultrasonic
Heating
peak max* (W) power (W)
or
MF2
25/45 kHz
* Due to the form of the signal the value of the ultrasonic peak maximum is four times higher
7
Product description
4.7
Description of unit features – front view
B
A
C
D
Illustration 4.7. TI-H 15
8
A
Stainless-steel transducer tank
B
Maximum filling level marking indicates the recommended
filling level maximum. This filling level should not be exceeded
even with the cleaning items immersed.
C
Plastic carrying handles for the safe transportation of the unit
even if the housing is hot.
D
Operating panel for the control of the unit functions
Description see section 4.10.
Product description
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 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.
A
B
C
D
E
Illustration 4.8 View tank TI-H 25
A
Overflow (TI-H 25 – TI-H 160)
B
Level switch (TI-H 25 – TI-H 160)
C
Filling level marking for minimum level
D
Heating element inside the tank (TI-H 25 – TI-H 160)
E
Drain opening
9
Product description
4.9
Description of unit features – back side
A
B
H
Illustration 4.9.1 back view unit types TI-H 5 - TI-H 20
C
D
E
F
H
G
B
Illustration 4.9.2 back view unit types TI-H 25 - TI-H 160
10
Product description
A
2-way ball valve ½“
B
Mains supply cable:
1 phase earthing contact
3 phases threephase current
C
Connection for supply surface skimming
D
Connection drain overflow to a pump filter unit
E
Cover plate (maintenance opening) for heating and float switch
F
Connection supply for bottom scouring
G
3-way ball valve for drain / supply
H
Nameplate
11
Product description
4.10
Description operating elements
A
B
E
F
C
D
G
Illustration 4.10.1 Operating panel multi-frequency unit
A
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)
B
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.
C
Pilot lamp heating
Indicates operation of the heating system.
D
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.
E
Turning knob „power“ for the stepless setting of the required
ultrasonic power: setting range 10 – 100 %.
F
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).
G
12
Switch „heating“ (on / off) for switching the heating on and off.
Plastic cover class IP65 to protect against entering moisture.
Product description
A
D
C
E
G
Illustration 4.10.2 Operating panel single-frequency unit
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.
13
Before initial operation
5
Before initial operation
5.1
Unpacking and placement
Packing material
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 for transport
damages
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.
Placement
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!
Risk of electrocution due to humidity inside the unit!
Protect the unit from entering humidity.
CAUTION
The unit inside is splashwater-proof.
Keep workplace and housing dry in order to prevent electrical
accidents and damages on the unit.
Ambient conditions
For safe operation of the unit the following preconditions must
be guaranteed:
•
•
5.2
Allowed ambient temperature during operation:
+5°C to +40°C
Allowed relative humidity of air during operation: max. 80%
Connect the unit to the mains
Required mains
conditions
: 1 phase (100 – 120 V or 220-240 V);
1 N; 1 PE protective earth.
: (200 – 208 V or 380 – 400 V)
3 phases 1 N; 1 PE protective earth.
Connect mains cable
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.
14
Putting into operation
6
Putting into operation
6.1
Filling of the unit with cleaning liquid
Pull the mains plug
Shut the drain
Observe filling level
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.
: Use the filling level marking inside the tank to
find the correct filling level.
: 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.
Allowed cleaning
media
Prohibited cleaning
media
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).
Risk of fire and explosion!
CAUTION
Never use flammable liquids, or solvents, directly in an
ultrasonic cleaning bath.
Use the cleaning media listed in section 8.3.
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.
15
Putting into operation
Risk of damage to the transducer tank!
NOTE
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.
Use the cleaning media listed in section 8.3.
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!
CAUTION
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!
16
Putting into operation
How to proceed
1. Turn the „heating“ switch to „on“
(Illustration 4.10.1/2 G)
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.
How to proceed
1. Turn the knob „function“ into „degas“ position (Illustration
4.10.1/2 D).
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.
17
Putting into operation
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!
NOTE
No cleaning items on
the tank bottom
Use cleaning basket
Acid-resistant tank
Cell walls, in particular in the sceletal and in joints, can be
damaged by prolonged ultrasonic acitivity.
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.
18
Ultrasonic cleaning process
7
Ultrasonic cleaning process
Please observe the following instructions before starting the
ultrasonic cleaning process.
Risk of scalding by hot surfaces and cleaning liquid!
CAUTION
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!
Ultrasonic units can produce annoying sounds.
NOTE
Wear personal ear protection devices when working close to an
ultrasonic unit which is operated without cover.
Ultrasonic energy is physically transformed into heat.
NOTE
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.
Sensitive surfaces can be damaged when exposed to
ultrasound over prolonged periods.
NOTE
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.
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.
19
Ultrasonic cleaning process
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).
Timer operation
mode
Permanent operation
mode
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).
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:
25 kHz
for the removal of coarse and tenacious contaminations and for
the precleaning of robust surfaces
45 kHz
for the fine cleaning and removal of contaminations from
sensitive surfaces
The frequency can be changed during ultrasonic operation.
20
Ultrasonic cleaning process
7.4
Setting ultrasonic mode
(on multi-frequency units only)
In addition to the degas mode for the degassing of cleaning
liquids, other ultrasonic operating modes can be selected:
Standard
Use the standard mode if the cleaning basket containing the
cleaning items as connected to a manual or automatic
oscillation device.
Operation in standard mode is selected at the turning knob
„function“ (Illustration 4.10.1 B).
Sweep
This ultrasonic mode ensures a continuous shifting of the sound
pressure maxima and so guarantees a more homogeneous
sound field distribution in the bath.
Use this mode if the cleaning basket containing the cleaning
items is not connected to a manual or automatic oscillation
device.
Operation in sweep mode is selected at the turning knob
„function“ (Illustration 4.10.1 B).
The turning knob „function“ can be switched during ultrasonic
operation.
21
Ultrasonic cleaning process
7.5
After the cleaning
Follow-up treatment
of cleaning items
As a rule the cleaned items must be rinsed and dried after the
cleaning process.
The choice of the rinsing medium or media depends on the
used cleaning media and on the cleanness requirements for the
cleaned items. It might be useful to rinse the items with
ultrasound.
Empty the unit
Drain the liquid as soon as it is dirty or if the unit has not been
operated over a prolonged period of time (certain residues and
contaminations can damage the stainless-steel tank).
Use the quick-drain duct to empty the tank.. The bottom of the
transducer tank is inclined towards the drain to accelerate the
draining process.
Cleaning of the
transducer tank
22
For instructions on the cleaning of the transducer tank after
draining please see section 9.1, Maintenance and care.
Cleaning media
8
Cleaning media
When choosing the cleaning chemicals ensure that the product
is suitable for use in an ultrasonic bath; products that are not
suitable can cause damage to the transducer tank and injure
the operating staff.
Elma has a large range of suitable cleaning chemicals for
various applications, developped and produced in our own
laboratory. Please contact your supplier for suitable cleaning
media.
Environment-friendly
chemicals
The organic detergents in the elma clean products are biodegradable. Product data sheets and safety data sheets are
available from the manufacturer.
8.1
Limitations concerning solvent-containing cleaners
Caution! Never use flammable liquids, or solvents, directly in
an ultrasonic cleaning tank. Risk of fire and explosion!
Observe the safety warnings in section 6.1.
Ultrasound increases the volume of vapourization of liquids and
creates a very fine mist that can catch fire on any ignition
source at any time.
Do not fill potentially explosive substances and flammable
solvents
• of the classes of hazard according to the Ordinance
Regulating Flammable Liquids. Al, B, AII, AIII
• or marked in compliance with the EEC directives by
symbols and safety warnings E or R1, R2
• or R3 for potentially explosive substances
• or F+, F or R 10, R 11 or R 12 for flammable substances
into the stainless-steel tank for ultrasonic treatment.
Exception
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 can then be put
into the stainless-steel tank which is filled with non-flammable
liquid (water with a few drops of interlacing agent).
In case of queries please contact the manufacturer or your
supplier.
23
Cleaning media
8.2
Limitations concerning aqueous cleaners
Do not use aqueous cleaning media with pH values in the acid
range (pH value < 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 through crevice corrosion within
a very short period of ultrasonic operation.
Acids and alkaline
solutions
Other media which can destroy the stainless-steel tank when
used in high concentrations or with high temperatures during
ultrasonic operation are: nitric acid, sulphuric acid, formic acid,
hydrofluoric acid (even diluted). (List is not guaranteed to be
complete.)
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.
Potassium hydroxide
KOH
Potassium hydroxide solution can cause stress corrosion
cracking of the ultrasonic tank.
Examples:
Entrainment of
chemical substances
•
treatment with hydrochloric acid or hydrofluoric acid, or salts
of acid solutions
•
removal of fluoride, chloride or tetrafluoroborate-containing
fluxing agents from soldered metal items or electronic
components
•
decalcifying of medical systems, which are contaminated
with physiological salt solution, in solution containing citric
acid
•
ultrasound-assisted rinsing of items which have been
etched with hydrofluoric acid or ammonium bifluoride.
The above limitations for the use of chemicals in an ultrasonic
bath also apply for the entering of the mentioned chemicals into
the aqueous (particularly distilled water) bath through
entrainment or from the removed dirt.
Acid-resistant tank
For the ultrasonic treatment with the above mentioned media
use an acid-resistant tank. Please contact your supplier for the
available equipment.
Disinfectants
The limitations of use also apply to the standard cleaners and
disinfectants if these contain the above mentioned compounds.
Safety regulations
Exclusion of liability
24
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.
The manufacturer cannot be held liable for any damages
caused by non-observance of the limitations mentioned in
sections 8.1 and 8.2!
Maintenance
9
Maintenance
9.1
Maintenance / Care
Caution! Pull the mains plug before carrying out any
maintenance works!
Electrical security
The present ultrasonic cleaning unit is generally maintenancefree.
Check the housing and the mains cable regularly for damage in
order to prevent electrical accidents.
Also check the transducer tank for leaks:
Check transducer
tank for leaks
In case of visible leaks in the transducer tank, e.g.
• if there are residues/stains of cleaning liquid under the unit
or beside the unit that have no known other reason
• or if there are losses of unheated liquid from the tank which
are not caused by vapourization
separate the unit from the mains.
Contact and inform your supplier or the manufacturer of the unit
about the leak and the cleaning liquid used. The unit must be
returned for inspection and, if required, for repair.
Care of transducer
tank
Check the transducer tank regularly for residues, in particular
on the bottom. Remove any residues found. Lime deposits in
the stainless-steel tank can be gently removed e.g. with
aqueous cleaning media such as elma clean 40 or elma clean
115C (operate the unit with water + concentrate).
Grid of air fan
Check regularly the grid of the air fan at the bottom of the unit
(not existent in all units).
Remove dirt if necessary to allow sufficient ventilation inside the
unit.
Care of housing
Residues of cleaning media can be wiped away as described
above depending on the kind of contamination.
Do not put the unit under water!
Disinfection
If the unit is used for medical and sanitary purposes it is
necessary to disinfect the transducer tank regularly (standard
surface disinfectants).
25
Maintenance
9.2
Check the safety switch-off (on TI-H 25 and bigger)
Check the functioning of the safety switch-off of heating and
ultrasound by the level switch monthly.
Level monitoring
To carry out this check the filling level must be reduced below
the position of the level switch. It is recommended to check the
unit when it is filled, ready for operation and heating up.
How to proceed:
1. Switch on ultrasound and heating.
2. Reduce the filling level by draining some of the liquid.
3. When the position of the level switch is approx. 1 -2 cm
above the liquid level, switch off ultrasound and heating
after approx. 10 seconds.
In order to avoid repeated switching on and off of ultrasound
and heating in the limit range of the level switch, the level
switch is fitted with a switch hysteresis of approx. 10 seconds.
In case of a malfunction please contact your supplier or the
manufacturer. If the unit is kept on operating in case of a
malfunction it must be under permanent observation.
9.3
Service life of the transducer tank
The transducer tank and particularly the sound-giving surfaces
are wear parts. The changes on the surfaces that occur after a
certain operating period are visible first as gray areas and later
on as material abrasions, the so-called cavitation erosion. The
Elma units are made of special highly cavitation-proof stainless
steel. In order to prolong the service life of the transducer tank
of your unit we recommend to observe the following
instructions:
•
Regularly remove any cleaning residues, in particular metal
particles and rust films (gently wipe, rinse, etc.).
•
Use suitable cleaning chemicals, with particular caution
concerning the kind of removed contamination (see section
8, Cleaning media, 2. Note on Risk of damages on the
transducer tank! and information thereon).
•
Exchange the cleaning medium before it is too heavily
contaminated.
Do not operate the ultrasound unnecessarily; switch off after the
cleaning process.
26
Putting out of action and waste disposal
9.4
Repair
Opening by
authorized
specialized
personnel only
Repair and maintenance works which require the unit to be
connected and opened must be carried out by authorized and
specialized personnel only.
Risk of electrocution due to live parts inside the unit!
CAUTION
Pull the mains plug before opening the unit!
The manufacturer cannot be held liable for any damage caused
by unauthorized maintenance or repair works on the unit.
In case of a breakdown of the unit please contact your supplier
or the manufacturer.
10
Putting out of action and waste disposal
The unit can be taken to metal and electronics recycling
stations or returned to the manufacturer.
11
Manufacturer’s contact address
CB Chemie und Biotechnologie GmbH
Berensweg 200,33334 Gütersloh
Phone +49 (0) 5241 / 94430
Fax +49 (0) 5241 /9443 44
Do you have any queries or suggestions concerning the present
unit, ist operation or the Oeprating Instructions?
Please contact us, we will be glad to assist:
Technical Support: +49 (0) 5241 9443-0
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Notes
Notes
28