Operation Manual Wet Digester B-440 096791 en
Table of contents Table of contents 1 2 3 4 5 6 7 8 9 3 About this manual . . . . . . . . . . . . . . . . . . . . . . Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 User qualification . . . . . . . . . . . . . . . . . . . 2.2 Proper use . . . . . . . . . . . . . . . . . . . . . . 2.3 Improper use . . . . . . . . . . . . . . . . . . . . . 2.4 Safety warnings and safety signs used in this manual . 2.5 Product safety. . . . . . . . . . . . . . . . . . . . . 2.5.1 General hazards .
Table of contents 10 11 4 Spare parts. . . . . . . . . . . . . . . . . . . . . . . . . 10.1 Scope of application and delivery . . . . . . . . . . 10.2 Spare parts, optional accessories and consumables Declarations and requirements. . . . . . . . . . . . . . 11.1 FCC requirements (for USA and Canada) . . . . . . 11.2 Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 1 About this manual About this manual This manual describes the Wet Digester B-440 and provides all information required for its safe operation and to maintain it in good working order. It is addressed to laboratory personnel and operators in particular. Read this manual carefully before installing and running your system and note the safety precautions in section 2 in particular. Store the manual in the immediate vicinity of the instrument, so that it can be consulted at any time.
2 2 Safety Safety This section introduces the safety concept of the instrument and contains general rules of behavior and warnings from direct and indirect hazards concerning the use of the product. For the users safety, all safety instructions and safety messages in the individual sections shall be strictly observed and followed. Therefore, the manual must always be available to all persons performing any tasks described herein. 2.
2 2.4 Safety Safety warnings and safety signs used in this manual DANGER, WARNING, CAUTION and NOTICE are standardized signal words for identifying levels of hazards and risks related to personal injury and property damage. All signal words, which are related to personal injury are accompanied by the general safety sign.
2 Symbol Safety Meaning Fire hazard Harmful to life-forms Hot item, hot surface Device damage Inhalation of substances Chemical burns by corrosives Fragile components Wear laboratory coat Wear protective goggles Wear protective gloves Additional user information Paragraphs starting with NOTE transport helpful information for working with the device / software or its supplementaries. NOTEs are not related to any kind of hazard or damage (see following example).
2 2.5 Safety Product safety The Wet Digester B-440 has been designed and built in accordance with current state-of-the-art technology, at the time of development. Safety warnings in this manual (as described in section 2.4) serve to make the user alert to and avoid hazardous situations emanating from residual dangers by giving appropriate counter measures. However, risks to users, property and the environment can arise when the instrument is damaged, used carelessly or improperly. 2.5.
2 2.5.2 Safety Warning labels on housing and assemblies The following warning sticker(s) can be found on the housing or assemblies of the Wet Digester: Symbol 2.5.
2 2.5.4 Safety Built-in safety elements and measures Buchi glassware design s All original Buchi digestion glassparts are made of high temperature and chemical resistant borosilicate glass. s Acid fumes generated during digestion accumulate in the glass hood s The fumes must be safely withdrawn from the glass hood by a Scrubber (e.g. Scrubber B-414) with sufficient suction flow. Heater The device is inherently safe due to its limited heating power.
3 3 Technical data Technical data This section introduces the reader to the Wet Digester and its specifications. It contains the technical data, requirements and performance data. 3.2 Technical data Technical data Power consumption max. 1200 W Integrated power outlet socket for Srubber B-414 max. load 100 W Temperature control range 0 – 600°C (working range starts at ambient temp.
3 3.3 Technical data Materials used Materials used Component Material designation Material code Steel, powder-coated with polyester-epoxide Housing 1.0330 Halogen bulb Heating element Aluminium Reflector AL — Borosilicate glass 3.
4 4 Description of function Description of function This section explains the basic working principle of the Wet Digester B-440. It also shows how the instrument is structured and provides a general functional description of its assemblies. 4.1 Functional principle The set-up with the optional condensate trap is suitable for all wet ashing operations (e.g. when using sulphuric acid).
5 5 Putting into operation Putting into operation This section describes how the instrument has to be installed. It also gives instructions for the initial startup. NOTE Inspect the instrument for damage during unpacking. If necessary, prepare a status report immediately and inform customer and your local Buchi representative. Keep the original packaging for future transportation. 5.1 Installation site Put the instrument into a fume hood onto a clean, stable and horizontal surface.
5 5.3 Putting into operation Electrical connections After the installation procedure has been completed successfully, the power plug of the Wet Digester can be connected to mains. The jumper cord should only be used to supply a Scrubber B-414 in line to the Wet Digester. The used mains circuit has to: s provide the voltage that is given on the type plate of the instrument. s be able to handle the load of the connected instruments.
6 6 Operation Operation This section gives examples of typical instrument applications and instructions on how to operate the instrument properly and safely. See also section 2.5 “Product safety” for general warnings. The Wet Digester is also capable to perform ashing at high temperatures. However, wet digestions often require aggressive acids at high temperatures for processing which are hazardous to life forms.
6 6.1 Operation Operating controls and housing Front side Glass hood (in closed condition) On-/Off switch (lights green when instrument is switched on) Operating panel with various parameter displays Crucibles seated in vitrified ceramic plate Handle to open and close the glass hood Glass connector to condensation trap or Scrubber Buttons Button Functionality START / CONT. Button to start or continue an active application.
6 Operation Buttons cont. SELECT LEFT SELECT BUTTON: Activate and sequentially jump between displays. Activated displays will blink for 10 seconds until falling back into deselected status automatically. SELECT RIGHT SELECT BUTTON: Select program 1 – 9. UP Button to increase the value of an activated display. DOWN Button to decrease the value of an activated display. Displays Display Indicated value and range STEP ... TIME [min.] Steps within a program.
6 Operation Rear side Condensate trap, installed at the housing brackets FPM / FKM hose to Scrubber Mains power input socket Mains power output socket to Scrubber (max.
6 6.2 Operation Preparing for use During the preparation process, handling with strong acid and other potentially dangerous substances will be inevitable. Thus, all steps must be performed under safe laboratory conditions! Prerequisites s s 6.2.1 All parts must be clean and free of damage. To achieve a reliable and reproducible digestion result, the quality of sample material and additives (e.g. acids) must be free of impurities and of adequate amount.
6 6.2.2 Operation Installing the vitrified ceramic plate s To prevent the crucibles from jamming, every aperture of the plate must be equipped with at least 2 spacing clips. s Place the vitrified ceramic plate on the heating dish. Install the vitrified ceramic plate with the smooth surface facing upwards! NOTICE Risk of ceramic plate and crucible stress cracks by heat.
6 6.2.3 Operation Installing the glass hood Place the glass hood into the two retaining cams and fix it in place by means of the counterpin. Be careful not to overtighten and crack the glass hood! Subsequently mount the elbow connector at the outlet of the glass hood and secure it with a clamp. Now the corrugated hose can be installed. Use hose clamps to secure the hose and check for proper seating! Open and close the glass hood to verify proper functionality.
6 6.3 Operation Setting up application parameters Internal program storage s The B-440 is capable of storing 9 application methods in its program storage. s Each program has 5 steps with individual parameter pairs of time and temperature. Parameter name Range Programs 1–9 Steps 1–5 Temperature ambient – 600 °C Time (per "STEP") 0 – 240 minutes Setting up PROGRAMs and STEPs s Switch "ON" the Wet Digester. ๗After the bootprocess ( 4 seconds) the instrument will be operational.
6 Operation NOTE Do not use coated tongs! Most coatings will melt at contact with hot crucibles! Close unused positions with empty crucibles for evenly heat distribution and to reach high temperatures! Starting an application s s s s Activate the fume hood. Use the crucible tongs to insert the crucibles into the openings of the ceramic plate. Close the glass hood and check all suction hoses and connections for proper seating. Switch "ON" the Wet Digester.
6 Operation After the application: s Use the handle to safely lift the glass hood. s Use the crucible tongs to remove the crucibles. The crucibles can be slippery! Ensure safe grip before taking out the crucible of the ceramic plate completely! s Place hot crucibles on a acid- and fireproof surface only. s Switch "OFF" the Wet Digester and the Scrubber. s Clean all accessories that have been in use. ๗ Optional: Dispose of the filling of the condensate trap if the activated charcoal is exhausted (e.g.
7 7 Maintenance and repairs Maintenance and repairs This section gives instructions on maintenance work to be performed in order to keep the instrument in a good and safe working condition. All maintenance and repair work requiring the opening or removal of the instrument housing must be carried out by trained service personnel and only with the tools provided for this purpose.
7 7.2 Maintenance and repairs General inspection and cleaning instructions Check the housing for visible defects (switches, plugs, enclosure etc.) and clean it regularly under safe conditions with a damp cloth. Wipe off any splashes of aggressive chemicals immediately using a damp cloth in order to avoid any damage being caused to the plastic coating on the housing. Cleaning under safe conditions s s Switch off the Wet Digester and unplug the power cord.
7 Maintenance and repairs soap solution) or in an ultrasonic bath. Visibly check for damages at all the glass components and sealing surfaces subsequently. NOTICE Risk of sealing damage by lubricants or sharp objects. s s s 7.2.2 Do not lubricate sealings Do not bring sealings in contact with sharp objects Use ethanol or soapy water as detergent only Liquid ingress into the instrument In case of liquid ingress into the housing the instrument is not safe to use anymore.
7 s s s Maintenance and repairs Push a fixation clip to free one side of the heating element with one hand. At its ceramic insulation, carefully lift the heating element slightly (!) above the holder. The heating element must not collide with the ceramic tube of the temperature sensor! Repeat the previous action at the second holder to completely free the heating element. Carefully put the heating element out of the heating chamber.
8 8 Troubleshooting Troubleshooting This section helps to resume operation after a problem has occurred with the instrument which does not require special technical training. It lists possible occurrences, their probable causes and suggests how to remedy the problem. The troubleshooting table below lists possible malfunctions and errors of the instrument. The operator is enabled to correct some of those problems or errors by him/herself.
9 9 Shutdown, storage, transport and disposal Shutdown, storage, transport and disposal This section instructs how to shut down and to pack the instrument for storage or transport. Specifications for storage and shipping conditions can also be found listed here. ! WARNING Death or serious poisoning by contact or incorporation of harmful substances. s s s s s s 9.
9 Shutdown, storage, transport and disposal Health and Safety Clearance Declaration concerning safety, potential hazards and safe disposal of waste. For the safety and health of our staff, laws and regulations regarding the handling of dangerous goods, occupational health and safety regulations, safety at work laws and regulations regarding safe disposal of waste (e.g.
10 10 Spare parts Spare parts This section lists spare parts, accessories and options including their ordering information. Only order spare parts and consumables from Buchi to maintain the warranty status and to assure best performance and reliability of the system and affected components. Any modifications to the spare parts used are only allowed with the prior written permission of the manufacturer.
10 Spare parts Ceramic plates and crucibles Vitrified ceramic plate Order number Sample positions 4 026661 036676 026663 Ceramic crucibles s s Opening sizes 6 39 mm s s Ensure number of sample positions matches order quantity 48 mm 56 mm 20 ml 49 ml 90 ml 026936 s 036675 s 026938 NOTE Contact your local Buchi representative for customized vitrified ceramic plates to meet other crucible sizes than offered above. For additional information about the listed products, see www.buchi.
10 Spare parts Spare parts Condensate trap, tube without connectors 036080 Glass hood 036081 Reflector 026924 Vitrified ceramic plate, 39 mm opening size 026661 Vitrified ceramic plate, 48 mm opening size 036676 Vitrified ceramic plate, 56 mm opening size 026663 Other opening sizes can be requested! 36 Crucible, 20 ml 026936 Crucible, 49 ml 036675 Crucible, 90 ml 026938 B-440 Operation Manual, Version D
10 Spare parts Spare parts Order no. Set of clips (20 pcs.
10 Spare parts Optional parts 38 Description Order no.
11 11 Declarations and requirements 11.1 FCC requirements (for USA and Canada) Declarations and requirements English: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to both Part 15 of the FCC Rules and the radio interference regulations of the Canadian Department of Communications. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
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BÜCHI Labortechnik AG CH-9230 Flawil 1 / Switzerland T +41 71 394 63 63 F +41 71 394 65 65 www.buchi.
