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上海翻譯公司完成操作手冊中英翻譯
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上海翻譯公司完成操作手冊中英翻譯VMD900DLVacuum Metal Deposition System For Latent Fingerprint DevelopmentOperating InstructionsContents1. Health & Safety Notices2. Description3. Technical Data4. Services Required5. Installation.6. Layout of Components7. Operation8. Recommended Servicing Requirements9. Recommended Spares List1. Health & Safety Notices WARNING! Please read these instructions and all the associated manufacturers instructionmanuals before attempting to use this equipment This system operates automatically. System vacuum pumps and valves can operate without warning. Caution should be used if disconnecting the compressed air supply pipework Isolate the system from the electrical mains supply before attempting any maintenance Caution should be used when operating this system Operators should fully familiarise themselves with all relevant Operating and Health & Safety procedures before attempting to use this system Please carefully read this manual before attempting to carry out any cleaning or maintenance on this system. Always where the recommended PPE when carrying our cleaning or maintenance on this system2. DescriptionThe VMD900DL Vacuum Metal Deposition System is designed to be used for the Vacuum Metal Deposition fingerprint detection technique.The system is designed to be used primarily for the coating of flexible packaging plastic, such as polythene bags and sacks, although provision is also made to coat articles made of solid plastic, glass, firearms and many other non‐porous samples.The process will be carried out in accordance with procedures developed by the Centre for Applied Sciences and Technology (CAST) and documented in the Fingermark Visualisation Manual 2014.GeneralThis system is designed in accordance with all British standards and is manufactured using new CE marked components.The system is suitable for use by staff in an operational Police or Forensic laboratory with the minimum of training and will require the minimum of maintenance.Components, controls and design is such as to minimise hazards to the health and safety of the operator and other personnel.The system has been designed to give rapid pump down times, ease of evaporation and air admittance such that cycle times are minimised.ChamberThe system is capable of coating the surface of flexible polythene sheet material up to 800 mm x 1214 mm, in one evaporation, without the substrate overhanging the work holder jig. The chamber is a horizontal cylinder, with an internal diameter of 770 mm and an internal useable depth of approximately 900 mm.A simple method for the loading and unloading the chamber with samples is provided (see work holder specification below).The chamber is fitted with one 200 mm diameter clear aperture window for easy viewing of the sample surfaces to be coated. This window provides a clear view diagonally upwards to the surface being coated.The chamber has been design so that an operator of average height can readily look through the viewing port and view the upper interior surface of the chamber.Four low voltage LED lamps (a minimum of 20 watts each) are provided, two either side of the filament bar, at positions of approximately one third, and two thirds along the filament bar assembly. These lamps can be easily replaced by the operator.The design of the lamp holder is such as to shield the viewer from the direct glare of the filament, but to maximise illumination of the sample surfaces being coated. The lights can be turned on and off during proccessing of the specimen and the development of the marksThese lamps can be easily replaced by the operator.A metal grid is fitted into the mouth of the pumping port to prevent material, such as polythene sheeting, from being sucked down into the pumps , and to prevent potential damage to the high vacuum valve.Work HolderA simple method of loading the articles to be treated is provided.A 750 mm diameter semi‐cylindrical workholder is fitted (approximately 25 mm less that the internal radius of the chamber, and 50 mm shorter than the useable internal length of the chamber). Thin polythene sheeting can be attached to it securely by means of small 10 mm diameter x 10 mm long high power Bromag magnets.The workholder is a magnetic grade of stainless steel. It is resistant to cleaning with weak alkalis or acids.The workholder is mounted on a system of support slides so that it may be withdrawn fully from the chamber, locked in the withdrawn position at positions of 45, 90 and 180 degrees.The workholder is designed so as to eliminate the possibility of independent movement of the two support slides and the locking systems for the work holder withdrawal and rotation are quick reliable and safe in operation.The design incorporates both friction stops and mechanical stops for maximum operator safety.Please Note: Care should always be taken when rotating the work holder system and the operator should ensure that out of balance loads are not fitted to the work holder.The work holder also has three parallel lines of small holes of 3 to 5 mm diameter above the filament bars so that bulky exhibits may be attached to the work holder for processing.Special ConsiderationsThe system is capable of handling typical amounts of water vapour and other contaminants, such as hydrocarbon oils and organic compounds generated from the samples. It can also handle the other significant source of contamination caused by the zinc evaporation.Please Note: A dust mask, gloves and safety glasses should be used when cleaning chamber furniture.Pumping SystemThe pumping group that has been supplied is well proven in this application and is exceptionally robust and reliable with high pumping speed/performance and is highly tolerant to the contaminants found in this process.The roughing pumps consist of an Edwards E2M80 (rotary pump)/Edwards EH500 (mechanical booster) combination that has a pumping speed of approximately 80m3hr‐1 at atmospheric pressure, and 400 m3hr‐1 at 10‐1 mbar. The E2M80 rotary pump is fitted with a MF100 oil mist filter to ensure a minimum discharge of oil mist via the pump exhaust.ISO100 backing/roughing pipework is used to ensure optimum pumping speed at the chamber without significant loss due to conductance limitations.A Varian VHS‐10 water cooled diffusion pump (5300 ls‐1) is supplied, and is fitted with a pneumatically operated high vacuum gate valve. The effective pumping speed at the chamber is 3750 l s‐1. The diffusion pump is filled with a charge of Silicone 704 fluid.The diffusion pump will tolerate inlet cooling water temperatures of up to 250C, and is fitted with a thermal snap switch and water flow switch that is interfaced to the PLC control system for alarm purposes and to provide an automatic fail‐safe condition.Pumping Performance and System SpecificationThe Edwards E2M80 (rotary pump)/Edwards EH500 (mechanical booster) combination with the Varian VHS‐10 high throughput diffusion pump, ensures that very fast pump down times are achieved.Without the Polycold cold finger running an empty, dry chamber evacuation time to process pressures for Gold or Silver ( 1x10‐5 mbar) is typically 6‐7 minutes.Under normal working parameters, with a trained operator, it is possible to complete a process in less than 12 minutes.Filament Support and Power SupplyThe evaporation filaments are dispersed along a line running from front to back of the chamber approximately 100 mm from the bottom of the chamber.The location of filaments with respect to the surface being coated is such as to create, as far as possible, a uniform coating of the surface during the evaporation of gold and zinc.There are three independently selectable sets of evaporation sources.The filament bars are designed so that there can be flexibility in the location of particular sources.Sources are mounted at approximately 1/4, 1/2, and 3/4 distance along the length of the chamber.The filament clamp fixings to the source bus bars has been designed so that changing the filament cannot result in accidental misalignment of the mounting.The filament bar assembly is designed for straightforward removal and dismantling to enable cleaning, and is of a robust construction. The insulator design minimises the potential problems of 'bridging' by zinc deposits.The power supply and control system is ideally suitable for raising the temperature of a pair of filaments for gold evaporation to white heat and two boats used for zinc to red heat in a controlled manner.Instrumentation and Control SystemThe control system is straight forward to use and all regularly used controls are readily accessible from the operators position in front of the chamber whilst observation is made through the chamber view port .The Mitsubushi FX series programmable logic controller (PLC) and E1101 touch panel alpha numeric display (HMI). The control system provides a simple semi‐automatic operation of the vacuum system.The PLC controls the running of the vacuum pumps and the evacuation of the chamber from atmospheric pressure to the process ready pressure using single button operation.The HMI display has a simple system mimic and is mounted within the control unit to allow the operator to easily identify system status. All controls are clearly labelled.The control system provides evaporation control via a ‘SOURCE’ . The PLC controls the chamber pressure to within the following parameters:GOLD Better than 2 X 10‐4 mbarZINC Between 3 x 10‐4 and 5 x 10‐4 mbarVacuum GaugesThe vacuum gauging consists of two ATC‐M active thermocouple gauge heads (one in the regeneration line and the other on the chamber) and one AIM‐S Active inverted magnetron gauge head on the chamber.The AIM‐S active inverted magnetron gauge head is automatically switched on and off at an optimum pressure (measured by the chamber ATC‐M) to protect it from operation at unsuitably high pressures.The AIM‐S head is readily demountable and can be easily cleaned even by a relatively non‐ technical operator without a detrimental effect to calibration.All pressures are displayed on the HMI display panel. These are as follows:BACKING PRESSURE – Displays the pressure in the backing line.ROUGHING PRESSURE – Displays the pressure in the chamber during the initial ‘roughing’ phase of the evacuation.HIGH VACUUM PRESSURE – Displays the pressure in the chamber during the ‘high vacuum’ phase of the evacuation.Cold Finger (Optional Extra)The vacuum chamber can be fitted with a cryogenically refrigerated cold finger with a Polycold PFC552 cryogenic refrigeration system. The refrigeration system is connected to a 'cold finger' with a 250 cm2 minimum surface area. The cold finger is of circular cross section and is self‐supporting. This system operates at <‐120 0CPlease Note: This option is highly recommended if processing exhibits with a high moisture content. Also for general use the presence of the cold finger significantly reduces the chamber evacuation time.The location of the cold finger is such that regular cleaning by wiping the full length may be easily carried out without obstruction, and without the need to remove any ancillary components.Please Note: The cold finger can still be at temperatures of –1000C with the chamber door open. Care must be taken to prevent cold burns on exposed skin.Health and SafetyDesign and construction will ensure safe operation by non‐technical, trained staff.Any potential hazards to health associated with the use of the machine are documented and fully comply with the UK Health and ‘Safety at Work Act’, the ‘Control of Substances Hazardous to Health Regulations’.Electrical LoadingThe VMD900DL system and water chiller require a 415V + neutral 3 ph, 50Hz, 63 Amp electrical supply. So far as practical the loading will be equally distributed between phases.Water SupplyThe cooling water flow requirement is 3.0 l min‐1 for the VHS‐10 diffusion pump at the maximum acceptable inlet temperature of 25oC. This can be either mains water or from a free standing water chiller.The cooling water flow requirement is 4.3 l min‐1 for Polycold PFC552HC system (if purchased) at the maximum acceptable inlet temperature of 13oC. This can be either mains water or from a free standing water chiller.Pneumatic SupplyThe compressed air requirement is 100 psi with virtually zero flow. This can be either factory air supply or from a free standing pneumatic compressor.ExhaustThe exhaust from the E2M80 pump is vented to atmosphere through an Edwards MF100 oil mist filterPlease Note: It is recommend that this exhaust is piped away to either a fume extraction point or through an external wall. This exhaust line must be left unobstructed at all times.SitingThe ‘Standalone’ Vacuum Metal Deposition System would normally be positioned in the laboratory with all pumps and accessories mounted into a separate service corridor or outbuilding to help reduce noise levels and heat output into the room and the working environment.The depth of the system inside the laboratory will not be more than 3005 mm with the work holder extended for loading, and the system will not be wider than 1200 mm including the control panel assuming that the pumps and any ancillary equipment are positioned outside.It is highly recommended that the E2M80/EH500 vacuum pump set is sited in a separate room to the main system. This is because both generate a heat load that would be unacceptable in a laboratory. For this reason the room that these units are sited in should have adequate natural or forced ventilation.The E2M80 vacuum pump has a noise level of 70 dB (A) and this should also be considered when siting this pump.Optional extrasThe closed loop water chiller should be located on a plinth either in a suitably cool and well ventilated service room or corridor, or alternatively it can be sited outside the building.It is recommended that the Polycold 552HC system and the compressor should also be sited in a suitably cooled and well ventilated service room or corridor.Floor LoadingApproximate floor loading:Main System (Chamber and Control) 1500 Kg over 970 mm x 860 mm Vacuum Pump Set (E2M80/EH500) 220 kg over 400 mm x 250 mmOptional ExtrasPolycold PFC552HC 408 Kg over 953 mm x 660 mmClosed Loop Water Chiller* 113 Kg over 652 mm x 575 mmClosed Loop Water Chiller** 188 Kg over 652 mm x 575 mmClosed Loop Water Chiller*** 316 Kg over 1310 mm x 660 mmPneumatic Compressor 50 Kg over 400 mm x 750 mm*System without Polycold PFC552 and chiller located inside**System without Polycold PFC552 and chiller located outside*** System with Polycold PFC552 and chiller located insideBuilding WorksAll required services as indicated above should be provided within 2 metres from the chosen location for the main system and associated equipment.Equipment DocumentationThe system will be supplied with:1. One copy of a simple to follow user guide.2. One copy of a comprehensive operating manual detailing all aspects of operation, care and maintenance.3. Technical DataRotary Pump : Edwards E2M80 (80 m3hr‐1)Mechanical Booster : Edwards EH500 (500 m3hr‐1)Diffusion Pump : Varian VHS‐10Noise Level : Less than 75 dBDimensions : 1800 mm wide x 1920 mm high x 2200 mm deepFinish : Light grey leatherette4. Services RequiredElectrical : 414V 3ph 50 Hz neutral + earthCurrent Rating : 63 Amp maximumPneumatic Air Supply : 80‐100 PSIWater Cooling (VHS‐10) : Flow 3.0 L min‐1 @ 25 oC max. Water Cooling (PFC552HC) : Flow 4.3 L min‐1 @ 13 oC max.Exhaust from Rotary Pump : Suitable extraction point to atmosphere5. InstallationThe system will be fully installed by West Technology Systems Limited engineers into a prepared site.Site the system in a clean location and level the unit to the using the levelling jacks provided on the base. Connect all services as per instruction manual.IMPORTANT NOTICE: Failure to reconnect all services correctly could be dangerous for both the system, system components and operator.IMPORTANT NOTICE: Check direction of all motors to ensure that the 3 phase connections are correct.IMPORTANT NOTICE: Service or reconnection work after relocation should only be carried out by qualified personnel.Please consult West Technology Systems Limited for any technical queries.6. General LayoutThe ‘VMD 900DL’ has been ergonomically designed to fit into most laboratory situations.All the mains services are located on a fixed panel at the rear of the machine, these include water, pneumatics, power and vacuum pump exhaust lines.The other panels are removable to allow easy access for maintenance purposes where required.The design of the system has taken into account that most operators will have no or limited knowledge of vacuum systems with most operations controlled via the PLC.The operator panel has all the controls for system start up and close down, chamber pump down and vent and sequential deposition. Vacuum pressure adjustment (for zinc layer) and source evaporation current control are located near to the HMI.The source transformers are located behind the removable panel on the right hand side of the main enclosure.The Programmable logic controller and all contactors and control wiring are located behind the removable panel to the left hand side of the main enclosure.7. OperationStarting the SystemPlease Note: Before operating this equipment please read all of the instructions provided.Please Note: Care should always be taken when rotating the work holder system and the operator should ensure that out of balance loads are not fitted to the work holder.First check that ‘EMERGENCY STOP’ button is not operational by turning it anti‐clockwise to release it.Next turn ‘ON’ the Mains supply at the wall.Then turn the power on by operating the switch located on the left hand side panel of the VMD900DL.The HMI will start its test routine and after approximately 15 seconds will display the ‘WEST TECHNOLOGY WELCOME SCREEN’.Pressing anywhere on this screen will take the operator to the ‘PUMP OPERATION SCREEN’Pressing on the ‘INFORMATION’ button will take the operator to the ‘INFORMATION SCREEN’ (see later).To start the system the operator presses the ‘START SYSTEM’ button.Please Note: If the ‘SAFETY RESET’ button is red then the system must be rest. To do this the operator presses the ‘SAFETY RESET’ button. After a short delay this button changes to ‘SAFETY HEALTHY’.Once the ‘SAFETY HEALTHY’ legend appears the operator can start the system by pressing the ‘START SYSTEM’ button. This button then changes to display ‘STOP SYSTEM’.The system takes 30 minutes to start up and the time is displayed as a count down in the ‘READY IN’ box.Control ScreenPressing the ‘CONTROL’ button on the System Mimic takes the operator to the ‘CONTROL SCREEN’.This is the main control screen for the system. The ‘CONTROL SCREEN’ is where the operator carrys out the sequential deposition process.Pressing the ‘PUMP DOWN’ buttong starts the evacuation of the chamber. As it is pressed the lengend on the button briefly changes to ‘PUMPING’ then returns to display ‘PUMP DOWN.The chamber pressure is displayed on the screen.Pressing the ‘LIGHTS OFF’ button switches on the chamber LED lamps to illuminate the inside of the vacuum chamber. When pressed the legend ‘LIGHTS OFF’ changes to ‘LIGHTS ON’. Pressing the button again switches the LED lamps off (legend changes back to ‘LIGHTS OFF’).To vent the vacuum chamber the operator simply presses the ‘VENT’ button. Once pressed the chamber is automatically vented back to atmospheric pressure.Pressing the ‘MENU’ button takes the operator to the ‘MENU SCREEN’.Pressing the ‘LIGHT BOX’ changes the HMI screem to a white light box screen. This is useful for a quick check of the process exhibit to evaluate the finermarks developed. Pressing the ‘MENU’ button takes the operator back to the ‘MENU SCREEN’.Pressing the ‘SEAL’ button will seal the chamber i.e. the high vacuum valve will close. This feature is useful for ‘holding an exhibit at high vacuum overnight.Gold/Zinc EvaporationOnce the chamber vacuum pressure reaches high vacuum pressure better than 1 x 10‐4 mbar the evaporation sources become active.To start the gold deposition process press the ‘SOURCE OFF’ button.After a short time delay the right hand legend ‘SOURCE OFF’ changes to ‘SOURCE 1’ and the left hand ‘SOURCE OFF’ legend changes to ‘GOLD LAYER 1’.At this point the operator can slowly adjust the located below the HMI screen and increase the evaporation current until the boat glows a dull red colour and gold wire melts and ‘wets’ the evaporation boat.Please Note: If the evaporation currents is ramped up too quickly then the gold wire may ‘jump’ out of the boat.When the gold has ‘wetted’ the evaporation boat the operator can slowly increase the evaporation current via the current potentiometer until the boat glows white hot and the gold will then evaporate. The evaporation should take no more than 3‐5 seconds. At the end of the evaporation the operator winds down the evaporation current to zero using the current potentiometer.Pressing the ‘SOURCE 1’ button then selects the second set of gold evaporation boats, if fitted.In normal operation this evaporation source is not used but there can be circumstances where the additional evaporation of gold is required. Alternatively this evaporation source can be used for the process where the sequential evaporation of silver after the zinc evaporation is required.When pressed the ‘SOURCE 1’ legend changes to ‘SOURCE 2’ and the ‘GOLD Layer 1’ legend changes to ‘GOLD Layer 2’. The evaporation sequence for gold is then repeated.If a second deposition of gold is not required then by pressing the ‘Source 1’ button twice the operator is taken to ‘SOURCE 3’ and the GOLD Layer 1’ legend changes to ‘ZINC LAYER’.The system will automatically adjust the chamber pressure for the evaporation of zinc, this normally takes a few seconds to stabilise at which point the legend ‘ ZINC LAYER’ will appear.Before slowly adjusting the current potentiometer, it is recommend that the operator switches the chamber lights off by pressing the ‘LIGHTS ON’ button.To evaporate the zinc the same process applies that was used to evaporate the gold i.e. the operator can slowly adjust the current potentiometer and increase the evaporation current until the boat glows a dull red colour and the zinc foil (or granules) source material melts and ‘wets’ the evaporation boat.At this point quickly turn the chamber lights on by pressing the ‘LIGHTS OFF’ button and observe the surface of the exhibit being processed. The zinc will start to deposit on to the surface of the exhibit developing the fingermark by slowly increasing the current.This will allow the operator to watch and assess the deposition of the zinc to obtain the optimum fingerprint image.The deposition of the zinc on to the sample material requires experience to deposit sufficient zinc to produce the fingerprint image but not too much zinc to decrease the sharpness of the fingerprint image.Please Note: If the evaporation currents is ramped up too quickly then the zinc may ‘jump’ out of the boat.Please Note: If the chamber pressure is too low for the zinc deposition process then then the ‘ZINC LAYER’ legend will not be displayed and the legend ‘PRESSURE LOW’ will appear on the screen.Please Note: If the chamber pressure is too high for the zinc deposition process then then the ‘ZINC LAYER’ legend will not be displayed and the legend ‘PRESSURE HIGH’ will appear on the screen.In either this case it is not possible to evaporate the zinc until the pressure condition has been rectified. This is done by carefully and gradually adjusting the leak valve located on the right hand side of the chamber.At the end of the zinc evaporation pressing the ‘SOURCE 3’ button will switch all evaporation sources off.Pressing the ‘VENT’ button returns the chamber to atmospheric pressure so the the processed exhibit material can be removed. Once pressed the legend changes briefly to ‘VENTING’ before returning to ‘VENT’.Venting the chamber takes approx 2 minutes.Menu ScreenThis screen allows acces to all the other system screens.Control Screen – Pressing this button takes the operator to the ‘CONTROL SCREEN’ (see above)System Start – Pressing this buton takes the operator to the ‘PUMP OPERATION SCREEN’ (see above).Pressure – Pressing this button takes the operator to the ‘PRESSURE SCREEN’ (see below).Mimic – Pressing this takes the operator to the ‘SYSTEM MIMIC SCREEN’ (see below).Data – Pressing this takes the operator to the ‘DATA SCREEN (see below).Information – Pressing this takes the operator to the ‘INFORMATION SCREEN (see below).Alarms – Pressing this takes the operator to the ‘ALARMS SCREEN’ (see below).Chinese/English – Pressing this button changes the languge used in the HMI screens from English to Chinese or vice versa.Pressure ScreenThis screen shows the backing, roughing and high vacuum gauge pressures.System Mimic ScreenThis screen provides information on the operational status of the system e.g. in the above example both vacuum pumps are running and the high vacuum valve and backing valve are open. The legend ‘HIGH VACUUM’ shows that the system is at high vacuum. The pressure display is showing 3.5 x 10‐5 mbar.Pressing the ‘LIGHTS OFF’ button switches on the chamber LED lamps to illuminate the inside of the vacuum chamber. This is is useful when loading the gold wire into the evaporation boats and also when initially applying current to the zinc boats during process deposition.Pressing the ‘MENU’ button takes the operator to the ‘MENU SCREEN’(see later). Pressing the ‘CONTROL’ button takes the operator to the ‘CONTROL SCREEN’ Pressing the ‘OUTSIDE’ button takes the operator to the ‘SERVICES SCREEN’.This screen shows the operational status of the water chiller (if fitted) and pneumatic compressor (if fitted). It also shows the operator whether the water supply and pneumatic air supplies are within operational parameters.Pressing the ‘INSIDE’ button return the operator to the ‘SYSTEM MIMIC SCREEN’.Data ScreenThis screen displays data on all the critical operational system parameters including the backing, roughing and high vacuum gauge pressures. The operational status of majorcomponents (e.g. rotary vacuum pump, mechanical booster pump etc.) and the series of set points used in the automatic control programme.Please Note: It is possible to change the set points, however, it is strongly recommended that the operator does not changes any set points without first discussing with West Technology.Information ScreenThis screen has a number of buttons that allows the operator to find out further information about the system:Start Pumps – this gives a descirption of the operational sequence of the vacuum pumps when the system is started.Alarms – this takes the operator to the ‘ALARMS SCREEN’ (see below).Pressure – this takes the operator to the ‘PRESSURE INFORMATION SCREEN’ (see below).Service – this takes the operator to the ‘SERVICE INFORMATION SCREEN’ (see below).Trends ‐ this takes the operator to the ‘PRESSURE TREND SCREEN’ (see below). Maintenance – this takes the operator to the ‘MAINTENANCE SCREEN’(see below). Timers – this takes the operator to the ‘TIMERS SCREEN’ (see below).I/O List – pressing this takes the operator to the ‘I/O LIST SCREEN ( see below).Pressure Information ScreenThis screen gives a description of how the backing, roughing and high vacuum pressure gauges work and display vacuum pressures.Service Information ScreenThis screen gives contact detail for West Technology. Contact us for service support contracts.Trends ScreenThis screen shows the pressure trends for the roughing and high vacuum gauges.Maintenance ScreenThis screen gives gives a weekly, monthly, 3 monthly and annual maintenance schedule for the system.Timers ScreenThis screen gives information about the diffusion high vacuum pump warm up timer (active during stsem start up) and the diffusion pump cool down timer ( active during system shut down).I/O List ScreenThis screen is password protected and can only be accessed by authorised service engineers. Once accessed this screen allows the engineer to select manual control of the system plus a range of other features.Process CycleLoading SamplesTo load sample materials into the chamber the operator must first release the door catch and open the door.Please Note: If the chamber has been in operation or left in a ‘sealed’ state then the operator must press the ‘VENT’ button on the ‘Control Screen’ to return the chamber to atmospheric pressure.The operator then withdraws the workholder (using the handle) from the chamber. With the workholder in the fully extended position the operator then pulls the small catch pin located on the right hand side and slowly rotates the workholder backwards.Please Note: The catch pin must be pulled out to fully rotate the work holder to its set position.The workholder has a three position latch assembly ‐ normal position, 90 degrees, 45 degrees and fully inverted. Once the work holder is in its required position the catch pin can be released to lock the work holder in position.The sample material is attached, making sure that it is smooth, to the workholder using the small high powered magnets. Once attached the workholder is rotated back to its normal position.Please Note: Care should always be taken when rotating the work holder system and the operator should ensure that out of balance loads are not fitted to the work holder.Finally the operator pushes the workholder back into the chamber and closes the door. Chamber EvacuationTo evacuate the chamber the operator must press the ‘PUMP DOWN’ button in the ‘CONTROL SCREEN’.The sequence of events are as follows:1. Roughing valve opens.2. Pressure within chamber reduces to a preset level (crossover pressure).3. Roughing valve closes. Backing valve opens.4. High vacuum valve opens.5. Chamber is evacuated to high vacuum pressure Deposition Process1. The operator first ensures that the current potentiometer is set at zero (fully clockwise).2. If not already in the ‘CONTROL SCREEN’ the operator then selects this screen via the ‘SYSTEM MIMIC SCREEN’ or the ‘MENU SCREEN’.3. In the ‘CONTROL SCREEN’ the operator presses the left hand ‘SOURCE OFF’ button, the button legend changes to ‘SOURCE 1’ and the right hand ‘SOURCE OFF’ legend below changes to ‘GOLD LAYER 1’.4. The operator then slowly turns the current potentiometer knob anticlockwise until the desired degree of evaporation is obtained. (See notes in ‘CONTROL SCREEN’ above).Please Note: Do not apply power to the gold source too rapidly, as thermal shock will take place and cause the gold to jump out of the evaporation boat. Apply power to the evaporation boat slowly until the gold first wets the boat, then increase the power for full evaporation. The gold will be fully evaporated by increasing the power until the boat glows white hot.Please Note: During gold evaporation it is best to have the chamber lights turned off.5. Once evaporation is completed the operator must return the current potentiometer knob fully clockwise to ensure that it is off.6. The operator then either selects to carry out a second gold evaporation by pressing the ‘SOURCE 1’ button once or proceeds with the zinc evaporation by pressing the ‘SOURCE 1’ button twice and the legend changes to ‘SOURCE 3’.There will be a short pause whilst the system automatically adjust the pressure in the chamber to around 3.0 x 10‐4 mbar. Once the vacuum pressure is within the defined range for the zinc deposition then the right hand legend changes to ‘ZINC LAYER’.The zinc evaporation pressure can be adjusted within predefined limits via the LV10K fine needle valve located just below the vacuum chamber on the RHS. Turning the valve knob clockwise increases the vacuum pressure (e.g. from 6.7 x 10‐4 to 3.3 x 10‐4 mbar), whilst anticlockwise decreases the vacuum pressure (e.g. from 3.3 x 10‐4 to 6.7 x 10‐4 mbar).When evaporating the zinc evaporation boat it is recommended that the chamber lights are initally turned off.Apply the power gently until the ends of the evaporation boat starts to glow a dull red color, and allow to the zinc to soak at this level for a short period of time before applying more power to start the evaporation.Please Note: When evaporating the zinc layer is is advisable to have the chamber lights turned on so the development of the finger print can be observed.Fingerprint development can be quite difficult to observe on certain materials. It is therefore advisable to secure a small white plastic test piece to the work holder to aid observation.7. Once evaporation is completed the operator must return the current potentiometer knob fully clockwise to ensure that it is off.8. After finishing the zinc evaporation it is recommended that the operator switches back to the ‘GOLD LAYER 1’ and winds the current up until the gold evaporation boats are glowing white hot. This will remove any zinc contamination from the boats.9. Once evaporation is completed the operator must return the current potentiometer knob fully clockwise to ensure that it is off.Chamber VentingTo vent the chamber back up to atmospheric pressure the operator must press the ‘VENT’ button in the ‘CONTROL SCREEN’.The sequence of events are as follows:1. High vacuum valve closes.2. After a short time delay the air admittance valve opens.3. Once chamber is at atmospheric pressure the air admittance valve closes and system resets.Chamber CleaningPlease Note: A respiratory dust mask, rubber gloves and safety glasses should be used when cleaning chamber furniture.Please Note: WTSL recommend that the system is shut down prior to commencing any cleaning.Please Note: Regular cleaning of the chamber is essential to ensure that large deposits do not build up. This will make routine maintenance easier and help to keep optimum performance from the system.To aid the cleaning process the chamber has been fitted with removable liners, once removed from the chamber they should be wiped down with a suitable solvent. We would recommend a light scouring pad for the more stubborn deposits.With the liners removed the chamber should be vacuumed out with special attention being taken around the bus bars to prevent build up of deposits that can lead to electrical shorting.Please Note: Spare liner sets can be ordered from West Technology. The LED lamp surfaces will also require periodic cleaning.We recommend that a putting a light smear of a suitable vacuum grease on the lamp so that it will only require cleaning with a suitable solvent cleaner. This will prevent any scratching of the lamp during cleaning.8. Recommended Service RequirementsWeekly• Check oil level in oil sight glass of all of the E2M80 and EH500 vacuum pumps. Replenish as necessary.• Check oil level in pneumatic compressor (if present). Replenish as necessary.• Clean chamber and ‘O’ ring door seal.Monthly• Clean chamber and chamber furniture.3 monthly• Check o ring door seal.6 monthly• Check condition and level of diffusion pump fluid.12 monthly• Minor service E2M80 pump• Change oil in EH500 mechanical booster (if necessary).• Check diffusion pump fluid.• Check seals on roughing, backing, air admittance and high vacuum valves.• Clean and check vacuum gauges.Caution: A respiratory dust mask, rubber gloves and safety glasses should be used when cleaning the chamber, chamber furniture, vacuum valves, vacuum gauges etc.Please Note: Gauges must be cleaned in accordance with the manufacturers instructions.9. Recommended Spare Parts and ConsumablesVMD900 Spares P/No.Ultragrade 20 oil 1 litre WTS/11024015/1LUltragrade 20 oil 4 litre WTS/11024013/4LDC704 Diffusion Pump Oil 1 litre WTS/704/1LAIM‐S‐NW25 Active Inverted MagnetronVacuum Gauge Head WTS/14641000ATC‐M‐1/8” Active Thermocouple VacuumGauge Head WTS/35108000Thyristor Fuse 16A WTS/THYFUSESpare Fuse Set WTS/FUSETool Box WTS/TOOLPack of 10 Bremag Magnets WTS/NB012B‐MLED Lamp WTS/MR16‐3CW‐XREP4‐CChamber Door Seal WTS/DOORSEALSet of ‘o’ Ring Seals WTS/SEALSETVMD Consumables (All models)Evaporation Boats P/No.Gold (Pack of 10) WTS/GOLD/BOATSilver (Pack of 10) WTS/SILVER/BOATZinc (Pack of 10) WTS/SILVER/BOATEvaporation Source MaterialGold Wire 1m WTS/GOLD/1MSilver Wire 1 m WTS/SILVER/1MZinc Granules 250g WTS/ZINC/250G世聯(lián)翻譯-讓世界自由溝通！專業(yè)的全球語言翻譯供應(yīng)商，上海翻譯公司專業(yè)品牌。絲路沿線56種語言一站式翻譯與技術(shù)解決方案，專業(yè)英語翻譯、日語翻譯等文檔翻譯、同傳口譯、視頻翻譯、出國外派服務(wù)，加速您的全球交付。 世聯(lián)翻譯公司在北京、上海、深圳等國際交往城市設(shè)有翻譯基地，業(yè)務(wù)覆蓋全國城市。每天有近百萬字節(jié)的信息和貿(mào)易通過世聯(lián)走向全球！積累了大量政商用戶數(shù)據(jù)，翻譯人才庫數(shù)據(jù)，多語種語料庫大數(shù)據(jù)。世聯(lián)品牌和服務(wù)品質(zhì)已得到政務(wù)防務(wù)和國際組織、跨國公司和大中型企業(yè)等近萬用戶的認(rèn)可。
