Ultrasonic Controller Operation Manual - John Morris Home · Ultrasonic Controller 1 11060052 Ultrasonic Nozzle with cable 1 11060053 Power supply cable (depending on region) 1 –

Ultrasonic ControllerOperation Manual

11593619 en

BÜCHI Labortechnik AGMeierseggstrasse 40PostfachCH9230 Flawil 1EMail: [email protected] reserves the right to make changes to the manual as deemed necessary in the light of experience; especially in respect to structure, illustrations and technical detail.This manual is copyright. Information from it may not be reproduced, distributed, or used for competitive purposes,nor made available to third parties. The manufacture of any component with the aid of this manual without priorwritten agreement is also prohibited.

Imprint

Product Identification:Operation Manual, Ultrasonic Controller11593619 en

Publication date:05.2014, Version B

BÜCHI Labortechnik AG Table of contents

Ultrasonic Controller iii

Table of contents1 General............................................................................................................................................................. 51.1 About this manual ..................................................................................................................................... 5

1.1.1 Structure of the manual ................................................................................................................. 51.1.2 Additional user information ............................................................................................................ 51.1.3 Available languages ...................................................................................................................... 61.1.4 Reference documents ................................................................................................................... 61.1.5 Abbreviations................................................................................................................................. 6

1.2 About the device ....................................................................................................................................... 61.2.1 General.......................................................................................................................................... 61.2.2 Type plate...................................................................................................................................... 6

1.3 Scope of delivery ...................................................................................................................................... 7

2 Safety ............................................................................................................................................................... 92.1 User qualifications .................................................................................................................................... 92.2 Proper use ................................................................................................................................................ 92.3 Safety warnings ........................................................................................................................................ 9

2.3.1 Warning explanation...................................................................................................................... 92.3.2 Symbols....................................................................................................................................... 10

2.4 General safety rules................................................................................................................................ 102.4.1 Responsibility of the operator ...................................................................................................... 102.4.2 Duty of maintenance and care..................................................................................................... 112.4.3 Spare parts to be used ................................................................................................................ 112.4.4 Modifications................................................................................................................................ 11

2.5 Product safety......................................................................................................................................... 112.5.1 General hazards .......................................................................................................................... 11

3 Technical data ............................................................................................................................................... 153.1 Device dimensions.................................................................................................................................. 153.2 Technical data, general .......................................................................................................................... 153.3 Technical data, electrical system............................................................................................................ 153.4 Technical data, peristaltic pump (B290) ................................................................................................ 15

4 Description of function................................................................................................................................. 174.1 Purpose and design................................................................................................................................ 174.2 Function .................................................................................................................................................. 17

4.2.1 Ultrasonic Atomizing Nozzle........................................................................................................ 174.3 Drop size distribution .............................................................................................................................. 204.4 Broadband Ultrasonic Controller............................................................................................................. 214.5 Peristaltic pump (B290) ......................................................................................................................... 22

5 Installation ..................................................................................................................................................... 255.1 Unpacking............................................................................................................................................... 255.2 Ultrasonic controller with nozzle, installation .......................................................................................... 255.3 Damper, installation ................................................................................................................................ 265.4 Feed tube, selection ............................................................................................................................... 275.5 Liquid feed rate, adjustment ................................................................................................................... 275.6 Cooling gas, adjustment ......................................................................................................................... 275.7 Accessories, installation ......................................................................................................................... 28

5.7.1 Inert Loop Adapter, installation.................................................................................................... 28

6 Operation....................................................................................................................................................... 31

Table of contents BÜCHI Labortechnik AG

iv Ultrasonic Controller

6.1 Stall point, determination ........................................................................................................................ 316.2 Operation with the Inert Loop B295....................................................................................................... 32

7 Maintenance .................................................................................................................................................. 337.1 Cleaning the nozzle ................................................................................................................................ 337.2 Peristaltic pump, adjustment................................................................................................................... 33

8 Troubleshooting............................................................................................................................................ 358.1 Customer service.................................................................................................................................... 358.2 Faults ...................................................................................................................................................... 35

8.2.1 Nozzle does not atomize ............................................................................................................. 358.2.2 No liquid delivery ......................................................................................................................... 358.2.3 Liquid emerges unatomized ........................................................................................................ 35

9 Taking out of operation ................................................................................................................................ 379.1 Transport ................................................................................................................................................ 379.2 Taking out of operation ........................................................................................................................... 37

10 Accessories and parts.................................................................................................................................. 3910.1 General information ................................................................................................................................ 3910.2 Accessories ............................................................................................................................................ 3910.3 Parts ....................................................................................................................................................... 39

11 Appendix........................................................................................................................................................ 41

Index............................................................................................................................................................... 43

BÜCHI Labortechnik AG General | 1

Ultrasonic Controller 5/46

1 GeneralThis manual describes the Ultrasonic Controller and provides all information required for its safe operation and to maintain it in good working order.It is addressed to laboratory personnel in particular.

1.1 About this manual

Read this manual carefully before installing and running the device. Note thesafety precautions in chapter 2 in particular. Store the manual in the immediatevicinity of the device, so that it can be consulted at any time.

1.1.1 Structure of the manual

The operation manual consists of 11 chapters which cover all information relevant to the operator of the device.

Chapter Meaning1 General Gives a general overview about the manual and

the device. It also gives a brief information on howto use this manual.

2 Safety Describes the safety concept of the device andthis manual. The safety chapter contains generalrules of behavior and warnings from hazards concerning the use of the product.

3 Technical data Describes the device specifications. It containstechnical data, requirements and performancedata.

4 Description of function Describes the basic principle of the device, showshow it is structured and gives a functional description of the assemblies.

5 Installation Describes how the device is installed and gives instructions on initial startup.

6 Operation Gives examples of typical device applications andinstructions on how to operate the device properlyand safely.

7 Maintenance Gives instructions on all maintenance work to beperformed in order to keep the device in goodworking condition.

8 Troubleshooting Helps to resume operation after a minor problemhas occurred. It lists possible occurrences, theirprobable cause and suggests how to remedy theproblem. Explains checks for troubleshooting andmaintenance.

9 Taking out of operation Describes how to store and dispose the device. Italso describes the reuse after a storage period.

10 Accessories and parts Lists accessories spare parts, wear parts and options including their ordering information.

11 Appendix Additional documents (e.g. requirements).

1.1.2 Additional user information

Page numberThe page number in the footer contains the current page (e.g. 1/47) and the total amount of pages (e.g. 1/47).

1 | General BÜCHI Labortechnik AG

6/46 Ultrasonic Controller

Note

NOTEParagraphs starting with NOTE transport helpful information for working with thedevice/software. NOTE’s are not related to any kind of hazard or damage.

1.1.3 Available languages

This operation manual is available in the following languages:

Language Order numberEnglish 11593619German 11593620French 11593621Italian 11593622Spanish 11593623Chinese 11593624Japanese 11593625

1.1.4 Reference documents

Mini Spray Dryer B290

Language Order numberEnglish 093001German 093000French 093002Italian 093003Spanish 093004Chinese 093109Japanese 11593570

1.1.5 Abbreviations

Abbr. DescriptioncP Centipoise (1 cP = 1 mPa×s)EA EachQty Quantity

1.2 About the device

1.2.1 General

No technical modifications may be made to the device without the prior writtenagreement of BUCHI. Unauthorized modifications may affect the system safetyor result in accidents.

1.2.2 Type plate

Type plate on the Ultrasonic controller is located in the rear on the side .

BÜCHI Labortechnik AG General | 1


Fig. 1: Key of type plate

1 Device name 2 Serial number3 Input voltage range 4 Frequency of input voltage5 Maximum power rating 6 Year of manufacture7 Country of manufacture

1.3 Scope of delivery

Description Qty Order numberUltrasonic Controller 1 11060052Ultrasonic Nozzle with cable 1 11060053Power supply cable (depending on region) 1 –Ypiece 2 11060527Silicon cap 2 11060528Silicon tube D2/4 1 004138

1 | General BÜCHI Labortechnik AG


BÜCHI Labortechnik AG Safety | 2


2 SafetyThe safety of users and personnel can only be ensured if the safety instructionsand the safety related warnings in the individual chapters are strictly observedand followed. Therefore, the manual must always be available to all persons operating the device.

2.1 User qualifications

Before using the Ultrasonic Controller the operation manual must be read andunderstood.The device may only be used by laboratory personnel and other persons whoon account of training or professional experience have an overview of the dangers which can develop when operating the device.

2.2 Proper use

The device has been designed and built for laboratories. It serves as a spraygenerator of dry particles with an average size of 10–60 μm.

2.3 Safety warnings

2.3.1 Warning explanation

DANGER, WARNING, CAUTION and NOTICE are standardized signal wordsfor identifying levels of hazard seriousness of risks related to personal injuryand property damage. All signal words, which are related to personal injury areaccompanied by the general safety sign.For the safety it is important to read and fully understand the table with the different signal words and their definitions.

Sign Signal word DefinitionDANGER Indicates a hazardous situation which, if not

avoided, will result in death or serious injury.

WARNING Indicates a hazardous situation which, if notavoided, may result in serious injury or death.

CAUTION Indicates a hazardous situation which, if notavoided, may result in minor or moderate injury.

NOTICE Indicates possible material damage, but nopractices related to personal injury.

Supplementary safety information symbols may be placed in a rectangularpanel on the left to the signal word and the supplementary text.

2 | Safety BÜCHI Labortechnik AG


Fig. 2: Example of warning

1 Safety symbol 2 Source of danger3 Instruction to avoid danger 4 Result of danger if not avoided5 Signal word, warning

2.3.2 Symbols

The reference list incorporates safety symbols and their meaning. The symbolscan occur in this operation manual or on the device.

Warning safety symbols

Symbol Meaning Symbol MeaningGeneral warning Hot surface

Electrical hazard Flammable

Device damage Explosive environment

Harmful substance Inhalation harmful

Mandatory safety symbols

Symbol Meaning Symbol MeaningWear protective goggles Wear protective clothes

Wear protective gloves Wear dust mask

2.4 General safety rules

2.4.1 Responsibility of the operator

The head of the laboratory is responsible for training his personnel.The operator shall inform the manufacturer without delay of any safetyrelatedincidents which might occur during operation of the device or its accessories.Issues can be reported to the email address: [email protected].



Legal regulations, such as local, state and federal laws applying to the device orits accessories must be strictly followed.

2.4.2 Duty of maintenance and care

The operator is responsible for the proper condition of the device. This includesmaintenance, service and repair jobs that are performed on schedule by authorized personnel only.

2.4.3 Spare parts to be used

Use only genuine BUCHI consumables and spare parts for maintenance to assure good system performance, reliability and safety. Any modifications of spareparts or assemblies are only allowed with the prior written permission of BUCHI.

2.4.4 Modifications

Modifications to the device are only permitted after prior consultation and withthe written approval of BUCHI. Modifications and upgrades shall only be carriedout by an authorized BUCHI technical engineer. BUCHI will decline any claimresulting from unauthorized modifications.

2.5 Product safety

The Ultrasonic Controller is designed and built in accordance with current stateoftheart technology. Nevertheless, risks to users, property, and the environment can arise when the device is used carelessly or improperly.BUCHI has identified the following residual dangers emanating from the device:• The device is operated by insufficiently trained personnel.• The device is not operated according to its proper use.• Appropriate warnings in this manual serve to make the user alert to theseresidual dangers.

2.5.1 General hazards

The following safety messages show hazards of general kind which may occurwhen handling the device. The user shall observe all listed counter measures inorder to achieve and maintain the lowest possible level of hazard.Additional warning messages can be found whenever actions and situations described in this manual are related to situational hazards.

DANGERRisk of inhalation of inert gases.Death by suffocation or serious poisoning.1. Do not inhale inert gases.2. Directly withdraw released gases and gaseous substances by sufficientventilation.

3. Only operate the device in ventilated environments.4. Before operation, check, if all parts, connections and seals involved in thegas flow are secure and in good working order.

5. Exchange worn out or defective parts immediately.



DANGERO2 sensor or filter malfunction.Death or serious poisoning by gases or particles.1. Exchange O2sensor regularly within the specified maintenance intervals.2. Exchange clogged filters immediately.3. Exchange filters regularly within the specified maintenance intervals.4. Dispose of filter immediately.

DANGERRisk of Inhalation or incorporation of dried particles during sprayprocess or at recovery.Death or serious poisoning.1. Wear safety goggles.2. Wear safety gloves.3. Wear a suitable protective mask.4. Wear a laboratory coat.5. Check for proper sealing before use.6. Do not inhale dried particles.7. Stop the flow of drying gas before opening the drying circuit.8. Only recover particles in sufficiently ventilated flue or glovebox.9. Do not disperse the dried particles.10. Do not clean dusty parts with compressed air.

WARNINGUse in explosive environments.Serious injuries or death.1. Do not operate the device in explosive environments.2. Do not operate the device with explosive gas mixtures.3. Before operation, check all gas connections for correct installation.4. Directly withdraw released gases and gaseous substances by sufficientventilation.



WARNINGRisk of contact or incorporation of harmful substances during operation.Serious poisoning or death.1. Before operation, check the device for correct assembly.2. Before operation, inspect seals and tubes for good working order.3. Exchange worn out or defective parts immediately.4. Exchange clogged filters immediately.5. Only operate the device in ventilated environments.6. Directly withdraw released gases and gaseous substances by sufficientventilation.

7. Perform a dryrun without sample material and check for gas leakages.

CAUTIONRisk of inhalation of ozone.Minor poisoning.1. Directly withdraw released gases and gaseous substances by sufficientventilation.

CAUTIONRisk of contact with hot parts.Minor or moderate burnings.1. Do not touch hot parts.2. Let the system cool down for several minutes after use.

NOTICERisk of spilled liquids or mechanical shocks.Liquids leaking into the housing or mechanical shocks can damage the device.1. Do not spill liquids over the device or its component parts.2. Wipe off any liquids instantly.3. Place the sample vessel onto the designated reservoirplate on top of thedevice.

4. Ensure a safe positioning of the sample vessel.5. Do not move the device when it is loaded with liquid.6. Keep external vibrations away from the device.



NOTICERisk of device damage by internal overpressure.An internal overpressure may damage the device.1. External supply pressure must meet the system specifications.2. Exchange clogged filters immediately.3. Dispose of filter immediately.

NOTICERisk of device damage by wrong external power supply.A wrong external power supply may damage the device.1. External power supply must meet the voltage given on the type plate.2. Check for sufficient grounding.

BÜCHI Labortechnik AG Technical data | 3


3 Technical data

3.1 Device dimensions

Fig. 3: Dimensions

3.2 Technical data, general

Description ValueWeight controller 2.4 kgOperating temperature 040 °CMaximum operating temperature of the nozzle* 120 °CAverage droplet size diameter (depends on sampleproperties and process conditions)

50–200 μm

Ultrasonic frequency 60 kHzViscosity maximum 50 cPMaximum flow rate for cooling gas depends on tubingFeed flow rate minimum 1 mL/minFeed flow rate maximum 9 mL/minRecommended maximum particle size in feed slurry 3 µm

*Operation temperature of the system can be higher, however cooling gas mustbe supplied to the nozzle to keep the temperature below 100 °C.

3.3 Technical data, electrical system

Description ValueInput voltage AC 90–260 VFrequency 50–60 HzPower consumption maximum 75 WPower output at nozzle 1–15 WOutput voltage DC (±5 %) 23–25 V

3.4 Technical data, peristaltic pump (B290)

Description ValuePump performance maximum (standard siliconetube)

30 mL/min (100 %)

Possible liquid feed rate using ultrasonic nozzle 1–9 mL/min (3–30 %)Recommended feed rate with aqueous feeds 2.5–3.2 mL/min (8–10 %)

3 | Technical data BÜCHI Labortechnik AG


BÜCHI Labortechnik AG Description of function | 4


4 Description of function

4.1 Purpose and design

The Ultrasonic Nozzle generates wet droplets with a mean size of 50–200 μmafter feed injection into the Mini Spray Dryer B290. The droplet size dependson the feed properties and process conditions such as solvent type, viscosity,surface tension, type of feed, atomization power and feed rate.

4.2 Function

4.2.1 Ultrasonic Atomizing Nozzle

An ultrasonic atomizing nozzle is a device that vibrates at frequencies beyondthose of human hearing; that is, in excess of 20 kHz. The atomized spray produced results from the breakup of unstable capillary waves developed in the liquid introduced onto the rapidly vibrating atomizing surface of the nozzle. Ultrasonic atomization is solely a surface phenomenon. The amount of liquid atomized depends exclusively on the rate at which liquid is introduced onto the surface.

Flow rateUltrasonic nozzles have infinite variability with respect to flow rate. Althoughpractical considerations related to the nozzle design limit this variability (typically the achievable ratio of maximum to minimum flow rates is at least 5:1), theability to precisely adjust flow rates by adjusting the rate at which liquid is delivered to the nozzle is often useful.

Spray velocityThe spray velocity is typically low with 18–36 cm per second as compared to10–20 m/second for standard pressure atomizing nozzles. This approximately100 fold reduction in spray velocity is equivalent to a 10’000 times reduction inkinetic energy.The reduced velocity and kinetic energy enables improved floating of thedroplets in the drying gas. This reduces the risk that droplets collide with thespray chamber especially at the bottom before complete dryness.

4 | Description of function BÜCHI Labortechnik AG


Fig. 4: Nozzle design (schematic)

1 Electrical connector 2 Rear horn3 Temperature sensor 4 Active electrode5 Atomizing surface 6 Piezoelectric transducer7 Ground electrode 8 Housing9 Ground lug

Discshaped ceramic piezoelectric transducers convert high frequency electricalenergy from a power generator into vibratory mechanical energy at the samefrequency.The transducers are sandwiched between 2 titanium cylinders, which act toconcentrate and amplify the vibration, maximizing it at the atomizing surface. Titanium is used because of its good acoustical characteristics, corrosionresistance and high strength.The liquid is delivered to the atomizing surface through a large diameter feedtube that runs the length of the nozzle. The large liquid feed orifice assures freedom from clogging.

4.2.1.1 Nozzle, power settingsThe ultrasonic atomization process is highly dependent on the power deliveredto the nozzle. Best results are achieved within a relatively narrow input powerrange. Below a critical power level, referred to as the “stall point”, there is insufficient energy to produce atomization. The power range in which atomizationproceeds normally is generally confined to a narrow region, approximately 0.5–1.5 Watt above the stall point. At power levels above this range, the liquid is literally “ripped apart” by the excess energy provided, causing large chunks ofmaterial to be expelled, rather than the characteristic soft spray of fine drops.This condition is known as cavitation.The actual power at which the stall point occurs is dependent on several factors:• Nozzle type (mechanical and electrical characteristics, size)• Liquid characteristics (e.g. viscosity, solids content)• Flow rate• Size of the atomizing surface



4.2.1.2 Type of liquidThe type of liquid being atomized strongly influences the minimum power level.More viscous liquids or liquids with highsolids content generally increase theminimum power requirement.

4.2.1.3 Flow rateThe flow rate also plays a role in determining minimum power level. For a givennozzle, the higher the flow rate, the higher will be the power required, since thenozzle works harder as the flow rate increases.

4.2.1.4 Cooling gas for nozzleThe spray gas, provided by the B290, serves as cooling gas for the ultrasonicnozzle. It is connected to the connector “In” for the compressed cooling gas ontop of the nozzle, while the “Out” connector is left open.The flow rate of the spray gas and thus the temperature of the nozzle can beadjusted with the needle valve at the flow meter of the B290.The temperature of the ultrasonic nozzle (as shown on the upper display of theultrasonic controller) should always be kept below 100 °C otherwise an alarmwill be triggered.



4.3 Drop size distribution

Fig. 5: Drop size distribution

X Drop diameter (microns) Y Percent of drops below given diameter

1 Sauter mean diameter 2 Weight mean diameter3 Surface mean diameter 4 Number mean diameter5 Number median diameter

Drop size in an ultrasonically produced spray is governed by the frequency atwhich the nozzle vibrates, and by the surface tension and density of the liquidbeing atomized. However, frequency is the predominant factor. Median dropsize is inversely proportional to frequency to the 2/3 power. Thus, the higher thefrequency the smaller the median drop size.Typically, the drop size distribution from ultrasonic nozzles follows a lognormaldistribution curve. In simple terms, this distribution has the familiar bellshapebut on a logarithmic scale. The chart shows this distribution on a cumulative basis for several nozzle frequencies for water.Various parameters can be used to characterize the mean and median dropsize of a particular drop distribution. The number median diameter defines the50 % point in drop size – that is, onehalf of the number of drops in the sprayhave diameters larger than this value while the other half have diameterssmaller than this value. The number mean and weight mean diameters are average diameters. The number mean diameter is obtained by adding togetherthe diameter of each drop in a spray sample and dividing that sum by the num



ber of drops in the sample. The weight mean diameter is obtained by adding together the volume of each drop in a spray sample (volume is proportional to diameter cubed), taking the cube root of this sum, and finally dividing by the number of drops. The Sauter mean diameter is a specialized parameter used primarily in combustion applications. It measures the effective ratio of drop volumeto surface area.

4.4 Broadband Ultrasonic Controller

Fig. 6: Front view

1 Temperature display 2 Reset button (temperature)3 Error LED 4 Power switch5 Power Watt display 6 Adjustment knob for nozzle

power7 Select button (temperature)

Fig. 7: Rear view

1 Connector, ultrasonic cable 2 Connector, external power supply



The high frequency electrical energy required by the spray nozzle is provided bythe Broadband Ultrasonic Controller. This power source offers an array of features that both simplify and enhance the operation of the nozzle systems:• Advanced phaselockedloop control technology to automatically lock onto anozzle’s specific operating frequency.

• Regulated output assures that the power delivered to a nozzle remains constant.

• Provides alarms in the event of system malfunction or critical temperaturebeing reached.

• LCD power meter and power level control for setup and monitoring.• Temperature control.• 100–240 VAC freestanding system.

4.5 Peristaltic pump (B290)

Fig. 8: Components of the peristaltic pump

1 Tube (to ultrasonic nozzle) 2 Pump bed3 Handle, pump bed 4 Tube connector5 Tube (supply)

The feed tube (1) is inserted into the pump bed (2) and tightened with the handle (3).



Fig. 9: Clamping force adjustment

1 Handle, pump bed 2 Adjustment screw

The clamping force of the handle (1) can be adjusted with screw (2) on the peristaltic pump of the B290. The procedure to adjust the peristaltic pump is described in:

• 7.2 Peristaltic pump, adjustment [ page 33]



BÜCHI Labortechnik AG Installation | 5


5 Installation

5.1 Unpacking

1. Unpack the device.2. Check the device for any damages caused by the transportation.

• Report damages immediately to the responsible transportation company.3. Check for completeness of the product according to the scope of delivery.4. Keep the original packaging for future transportation.

5.2 Ultrasonic controller with nozzle, installation

Fig. 10: Installation of Ultrasonic controller and nozzle

1 Ultrasonic controller 2 Feed solution3 Ultrasonic cable 4 Compressed spray gas5 Pulsation damper 6 Ypiece7 Ultrasonic nozzle 8 Feed tubea Compressed cooling gas “In” b Connector for Feed tubec Connector for ultrasonic cable d Compressed cooling gas “Out”

1. Insert the nozzle (7) completely into the heater element on top of theB290.

2. Place the Ultrasonic Controller (1) on the product feed table of the B290.3. Connect the power cord to the Ultrasonic Controller.

• Use a plugin location which allows to disconnect the device at any time.4. Attach the nozzle using the ultrasonic cable (3) to the connector on therear side of the controller.

5 | Installation BÜCHI Labortechnik AG


5. Connect the feed tube (8) to the Ultrasonic nozzle (connector (b)) while integrating the damper into the tube. (See below)

6. Connect the spray gas (compressed air or nitrogen), as provided by the installation of the B290, to the nozzle (connector (a)). The spray gas willserve as cooling gas for the nozzle.

5.3 Damper, installation

Fig. 11: Installation of the damper

1 Feed tube (long part) 2 Connector for feed solution3 Feed tube (short part) 4 Ypiece5 Damper

The damper is integrated into the feeding tube. To install it proceed as follows:1. Select the suitable type of tube for the feed solution.2. Prepare a piece of tube of the adequate length for the connection betweenthe feed solution vessel on the product feed table and the correspondingconnector (2) of the ultrasonic nozzle.

3. Cut of a short piece of the prepared tube (3).4. Connect the ypiece (4) to the longer part of the feed tube (1) and theshorter part (3), as described above.

5. Slide the damper (5) on the free connector of the Ypiece (4).6. Insert the free end of the feed tube into the feed solution vessel. Makesure in dips into the solution.

NOTEThe damper can also be used to remove a slight blockage in the nozzle by simply squeezing it. This will generate a short overpressure impulse that in somecases is sufficient to remove the blockage.



5.4 Feed tube, selection

1. Choose a feeding tube from the table below.

NOTEFor short processes, even unsuitable tubes can be used, as swelling takessome time.

Solvent Silicone tube Tygon® MH 2075 Tygon® F 4040 AMethanol • • •Ethanol • • •Acetone – • –Toluene – – –Isopropanol • • •Chloroform – – –Dichlormethane – – –Tetrahydrofuran – – –Ethylacetate – • –Hexane – – •Table 1: • = suitable | – = unsuitable

5.5 Liquid feed rate, adjustment

1. Adjust the feed rate according to the following settings according to thedesired requirement:• Possible liquid feed rate using ultrasonic nozzle 1–9 mL/min (3–30 %).• Recommended feed rate with aqueous feeds 2.5–3.2 mL/min (8–10 %).

5.6 Cooling gas, adjustment

Adjust the flow rate of the cooling gas using the needle valve at the flow meterof the B290.The temperature of the ultrasonic nozzle shall always be below 100 °C. If thetemperature of the ultrasonic nozzle rises (the temperature can be checked onthe upper display of the ultrasonic controller), the flow rate of the cooling gasneeds to be increased.



5.7 Accessories, installation

5.7.1 Inert Loop Adapter, installation

1. Install the 2 hose clamps (3) on the cut inlet heater hose (2).• 004237 Hose clamp 3045 DIN3017

2. Install the hose connector (4) on the inert gas adapter (1).• 048637 Hose connector 61/8"• 11060798 Inert gas adapter

1. Connect the inert gas hose (1) from the nozzle outlet to the hose connector (2).• 11058850 FEP hose Ø4.0/6.0 l=1500 mm



1. Connect the inert gas supply hose (1) on the inlet of the nozzle.2. Connect the inert gas hose (2) to the outlet of the nozzle.

• 11058850 FEP hose Ø4.0/6.0 l=1500 mm



BÜCHI Labortechnik AG Operation | 6


6 Operation

NOTICERisk of liquids leaking into the housing or electrical components.Device damage by liquids and detergents and corrosion.1. Do not spill liquids over the device.2. Wipe off any liquids instantly.3. Place the distilled water onto the designated reservoirplate on top of theB290.

6.1 Stall point, determination

1. Switch on the ultrasonic controller.2. Turn the adjusting knob counterclockwise until the display shows 0 Watt.3. Turn the adjusting knob clockwise until the display shows 7 Watt.4. Switch on the peristaltic pump.

• Use a rate consistent with the anticipated flow rate for the application.5. Turn the power level down until the nozzle has stalled (atomizationceases).• Note the value (Watt) on the display when the atomization has ceased.

6. Switch off the peristaltic pump.7. Increase the power until the atomizing surface has cleared itself of liquid.8. Switch on the peristaltic pump.9. Set the power 1 Watt above the previously noted stall point.

• If the stall point is less than 1.5 Watt, increase the power level to0.5 Watt above the stall point value.

NotePower settings are also related to flow rate. If you intend to use flow rateshigher than chosen in step 4, it may require that the power be increased beyondthe level determined in steps 5–9 above.

6 | Operation BÜCHI Labortechnik AG


Fig. 12: Nozzle droplet formation

If the stall point has been determined optimally, the liquid covers up to twothirds of the atomizing surface radius.

6.2 Operation with the Inert Loop B295

The Mini Spray Dryer B290 with the ultrasonic nozzle and the Inert Loop B295is operated in the same way as described in the Mini Spray Dryer B290 operation manual section 6.7. As the inert gas (N2) is not introduced into the systemby the ultrasonic nozzle, an Inert Loop Adapter (11060492) is needed to injectthe inert gas into the system.

BÜCHI Labortechnik AG Maintenance | 7


7 MaintenanceAll maintenance and repair work described in this manual can be carried out bythe operator. All other tasks must be carried out by trained service personnel.Therefore contact the BUCHI customer service or the sales representative.Use only genuine BUCHI consumables and spare parts for maintenance to assure good device performance, reliability and safety. Any modifications of spareparts or assemblies are only allowed with the prior written permission of BUCHI.

7.1 Cleaning the nozzle

NOTICERisk of damaging the nozzle.Malfunction of the nozzle resulting in inaccurate particle diameters.1. Do not attempt to drill out material hardened in the liquid feed passage ofthe nozzle.

2. Do not immerse the nozzle in an ultrasonic cleaning bath or any othercleaning bath.

1. If possible, flush the nozzle with an appropriate solvent after each use (forexample water or isopropyl alcohol).

2. Prior to cleaning, turn the system OFF and disconnect the interconnectingcable and the liquid feed tube from the nozzle.

3. If significant build up of material occurs, use the following method to cleanthe nozzle atomizing surface and the liquid feed passage:• The liquid feed passage may be cleaned by inserting a pipe cleaner orsmall round brush into the nozzle orifice or liquid feed tube at the end ofthe nozzle. For best results, make several passes through the nozzle.• The nozzle tip (atomizing surface), may be cleaned using a mild scouringabrasive (such as steel wool or “Softscrub” tub and tile cleaner).

7.2 Peristaltic pump, adjustment

NOTICERisk of liquids leaking into the housing or electrical components.Device damage by liquids and detergents and corrosion.1. Do not spill liquids over the device.2. Wipe off any liquids instantly.3. Place the distilled water onto the designated reservoirplate on top of theB290.

Preliminary tasks1. Remove the ultrasonic nozzle from the Mini Sprayer B290 and place itinto a suitable container.

Tasks1. Insert the tube (1) in to the pump bed.2. Put the tube (2) on the suction side into distilled water.3. Close the pump bed with the handle (3).

7 | Maintenance BÜCHI Labortechnik AG


4. Set pump speed to 8 % and switch on pump.5. Switch on Ultrasonic Nozzle and set power to 2 W.6. Turn in the adjusting screw (4) until the water is sucked in steadily.7. Set the correct atomization power/stall point.

• 6.1 Stall point, determination [ page 31]8. Check if turning out the adjusting screw by ¼ turn helps to decrease pulsation, otherwise leave the position of the previous step.

9. Switch off pump.• The feed must stop.

10. Switch off Ultrasonic Nozzle.

Fig. 13: Adjustment of peristaltic pump

Followon tasks1. Install spraying nozzle into the Mini Sprayer B290.

BÜCHI Labortechnik AG Troubleshooting | 8


8 Troubleshooting

8.1 Customer service

Only authorized service personnel are allowed to perform repair work on the device which is not described in this manual. Authorization requires comprehensive technical training and knowledge of possible dangers which might arisewhen working on the device. Such training and knowledge can only be providedby BUCHI.If malfunctions of the device occur or for technical questions or application problems, contact one of our offices.The customer service and support offers the following support:• Spare part delivery• Repairs• Technical adviceAddresses of official BUCHI customer service offices are given on the BUCHIwebsite.

www.buchi.com

8.2 Faults

8.2.1 Nozzle does not atomize

1. Check if all electrical connections are properly installed.2. Check the nozzle power setting on the controller.

• Make sure that a sufficient setting is used.3. Check the peristaltic pump is working properly.4. Check all connections of the liquid feeding line.

• Insufficient liquid supply can cause a high temperature to build up on thenozzle.

8.2.2 No liquid delivery

1. Check the condition of the tube used in the peristaltic pump.• Replace a worn out tube.

2. Adjust the peristaltic pump.

8.2.3 Liquid emerges unatomized

1. Check the maximum flow rate is within the rated nozzle capacity.• 3.4 Technical data, peristaltic pump ﴾B‐290﴿ [ page 15]

2. Check the feed viscosity and particle size of the slurry are within the specifications.• 3.2 Technical data, general [ page 15]

3. Turn off the peristaltic pump.4. Switch the Ultrasonic Controller on/off for 5 times to get the liquid out ofthe ultrasonic nozzle, or use the damper by squeezing it.

5. Set the correct atomization power/stall point.• 6.1 Stall point, determination [ page 31]

http://www.buchi.com

8 | Troubleshooting BÜCHI Labortechnik AG


BÜCHI Labortechnik AG Taking out of operation | 9


9 Taking out of operation

9.1 Transport

Preliminary tasks1. Prepare the original packaging.2. Clean the Ultrasonic Generator.

• Make sure the device is free of any liquids and residues.

Tasks1. Disassemble the device in reverse order.

• 5.3 Damper, installation [ page 26]• 5.2 Ultrasonic controller with nozzle, installation [ page 25]

2. Put all relevant documentation e.g. operation manual into the packaging.

9.2 Taking out of operation

1. Remove all liquids and residues.• For device disposal in an environmentally friendly manner, make surethat the components are separated and recycled correctly by a specialistfor disposal.• For disposal of liquids and consumables such as catalyst or acid, see thedata sheets of these chemicals.

2. Follow the valid regional and local laws concerning a disposal. For help,please contact the local authorities.

9 | Taking out of operation BÜCHI Labortechnik AG


BÜCHI Labortechnik AG Accessories and parts | 10


10 Accessories and parts

10.1 General information

Always state the part number and product description when ordering spareparts.Use only genuine BUCHI consumables and spare parts for maintenance to assure good system performance, reliability and safety. Any modifications of spareparts or assemblies are only allowed with the prior written permission of BUCHI.Description:• Shows the nomenclature of item.• Shows technical information e.g. diameter, length, weight.Quantity (Qty):• Shows the quantity of items included.

10.2 Accessories

Description Qty Order numberInertgas adapter cpl 1 11060492

10.3 Parts

Description Qty Order numberYpiece 1 11060527Ultrasonic Nozzle with cable 1 11060053Ultrasonic Controller 1 11060052Silicon tube D2/4 1 004138Silicon cap 1 11060528

10 | Accessories and parts BÜCHI Labortechnik AG


BÜCHI Labortechnik AG Appendix | 11


11 AppendixNot used

11 | Appendix BÜCHI Labortechnik AG


BÜCHI Labortechnik AG Index


Index

AActive electrode 18Adjustment screw, peristaltic pump 23Atomizing surface 18, 31

CCooling gas, adjustment 27

DDamper 26Drop size distribution 20

EElectrical connector 18External power supply 21

FFeed rate, adjustment 27Flow rate 17

GGround electrode 18Ground lug 18

HHazards 11

MMaintenance 33Modifications 11

PPeristaltic pump 22, 34, 35

RRear horn 18

SSauter 20Spray gas 19, 25Spray velocity 17

TTemperature sensor 18Type of liquid 19Type plate 7

UUltrasonic cable 21

YYpiece 25, 26

Index BÜCHI Labortechnik AG


Quality in your hands

BUCHI Affiliates:

We are represented by more than 100 distribution partners worldwide.

Find your local representative at: www.buchi.com

BÜCHI Labortechnik AGCH – 9230 Flawil 1

T +41 71 394 63 63

F +41 71 394 65 65

[email protected]

www.buchi.com

BÜCHI Labortechnik GmbHDE – 45127 Essen

Freecall 0800 414 0 414

T +49 201 747 490

F +49 201 747 492 0

[email protected]

www.buechigmbh.de

BUCHI SarlFR – 94656 Rungis Cedex

T +33 1 56 70 62 50

F +33 1 46 86 00 31

[email protected]

www.buchi.fr

BUCHI Italia s.r.l.IT – 20010 Cornaredo (MI)

T +39 02 824 50 11

F +39 02 57 51 28 55

[email protected]

www.buchi.it

BÜCHI Labortechnik GmbHBranch Offi ce Benelux

NL – 3342 GT

Hendrik-Ido-Ambacht

T +31 78 684 94 29

F +31 78 684 94 30

[email protected]

www.buchi.be

BUCHI UK Ltd.GB – Oldham OL9 9QL

T +44 161 633 1000

F +44 161 633 1007

[email protected]

www.buchi.co.uk

BUCHI Russia/CISUnited Machinery AG

RU – 127787 Moscow

T +7 495 36 36 495

F +7 495 981 05 20

[email protected]

www.buchi.ru

BUCHI ChinaCN – 200052 Shanghai

T +86 21 6280 3366

F +86 21 5230 8821

[email protected]

www.buchi.com.cn

BUCHI (Thailand) Ltd. TH – Bangkok 10600

T +66 2 862 08 51

F +66 2 862 08 54

[email protected]

www.buchi.co.th

Nihon BUCHI K.K. JP – Tokyo 110-0008

T +81 3 3821 4777

F +81 3 3821 4555

[email protected]

www.nihon-buchi.jp

BUCHI India Private Ltd.IN – Mumbai 400 055

T +91 22 667 75400

F +91 22 667 18986

[email protected]

www.buchi.in

PT. BUCHI IndonesiaID – Tangerang 15321

T +62 21 537 62 16

F +62 21 537 62 17

[email protected]

www.buchi.co.id

BUCHI Korea IncKR – Seoul 153-782

T +82 2 6718 7500

F +82 2 6718 7599

[email protected]

www.buchi.kr

BUCHI CorporationUS – New Castle,

Delaware 19720

Toll Free: +1 877 692 8244

T +1 302 652 3000

F +1 302 652 8777

[email protected]

www.mybuchi.com

BUCHI do BrasilBR – Valinhos SP 13271-570

T +55 19 3849 1201

F +41 71 394 65 65

[email protected]

www.buchi.com

BUCHI Support Centers:South East Asia

BUCHI (Thailand) Ltd.TH-Bangkok 10600

T +66 2 862 08 51

F +66 2 862 08 54

[email protected]

www.buchi.com

Latin America

BUCHI Latinoamérica Ltda.BR – Valinhos SP 13271-570

T +55 19 3849 1201

F +41 71 394 65 65

[email protected]

www.buchi.com

Middle East

BUCHI Labortechnik AGUAE – Dubai

T +971 4 313 2860

F +971 4 313 2861

[email protected]

www.buchi.com

BÜCHI NIR-Online

DE – 69190 Walldorf

T +49 6227 73 26 60

F +49 6227 73 26 70

[email protected]

www.nir-online.de

Documents

Ultrasonic Controller Operation Manual - John Morris Home · Ultrasonic Controller 1 11060052 Ultrasonic Nozzle with cable 1 11060053 Power supply cable (depending on region) 1 –