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世聯翻譯公司完成操作手冊英文翻譯VMD900DL Instruction Manual Page 2Copyright © West Technology Systems Limited 2014VMD900DLVacuum Metal Deposition SystemFor Latent Fingerprint DevelopmentOperating InstructionsVMD900DL Instruction Manual Page 3Copyright © West Technology Systems Limited 2014Contents1. Health & Safety Notices2. Description3. Technical Data4. Services Required5. Installation.6. Layout of Components7. Operation8. Recommended Servicing Requirements9. Recommended Spares ListVMD900DL Instruction Manual Page 4Copyright © West Technology Systems Limited 20141. Health & Safety NoticesWARNING! 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 operatewithout warning. Caution should be used if disconnecting the compressed air supply pipework Isolate the system from the electrical mains supply before attempting anymaintenance Caution should be used when operating this system Operators should fully familiarise themselves with all relevant Operating andHealth & Safety procedures before attempting to use this system Please carefully read this manual before attempting to carry out any cleaning ormaintenance on this system. Always where the recommended PPE when carrying our cleaning or maintenanceon this systemVMD900DL Instruction Manual Page 5Copyright © West Technology Systems Limited 20142. DescriptionThe VMD900DL Vacuum Metal Deposition System is designed to be used for the VacuumMetal 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 ofsolid plastic, glass, firearms and many other non‐porous samples.The process will be carried out in accordance with procedures developed by the Centre forApplied Sciences and Technology (CAST) and documented in the Fingermark VisualisationManual 2014.GeneralThis system is designed in accordance with all British standards and is manufactured usingnew CE marked components.The system is suitable for use by staff in an operational Police or Forensic laboratory withthe 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 ofthe operator and other personnel.The system has been designed to give rapid pump down times, ease of evaporation and airadmittance such that cycle times are minimised.ChamberThe system is capable of coating the surface of flexible polythene sheet material up to 800mm 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 internaluseable depth of approximately 900 mm.A simple method for the loading and unloading the chamber with samples is provided (seework holder specification below).The chamber is fitted with one 200 mm diameter clear aperture window for easy viewing ofthe sample surfaces to be coated. This window provides a clear view diagonally upwards tothe surface being coated.VMD900DL Instruction Manual Page 6Copyright © West Technology Systems Limited 2014The chamber has been design so that an operator of average height can readily look throughthe 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 ofthe filament bar, at positions of approximately one third, and two thirds along the filamentbar 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 thefilament, but to maximise illumination of the sample surfaces being coated. The lights canbe 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 aspolythene sheeting, from being sucked down into the pumps , and to prevent potentialdamage 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 theinternal radius of the chamber, and 50 mm shorter than the useable internal length of thechamber). Thin polythene sheeting can be attached to it securely by means of small 10 mmdiameter x 10 mm long high power Bromag magnets.The workholder is a magnetic grade of stainless steel. It is resistant to cleaning with weakalkalis or acids.The workholder is mounted on a system of support slides so that it may be withdrawn fullyfrom 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 ofthe two support slides and the locking systems for the work holder withdrawal and rotationare quick reliable and safe in operation.The design incorporates both friction stops and mechanical stops for maximum operatorsafety.Please Note: Care should always be taken when rotating the work holder system and theoperator should ensure that out of balance loads are not fitted to the work holder.VMD900DL Instruction Manual Page 7Copyright © West Technology Systems Limited 2014The work holder also has three parallel lines of small holes of 3 to 5 mm diameter above thefilament 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 alsohandle 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 chamberfurniture.Pumping SystemThe pumping group that has been supplied is well proven in this application and isexceptionally robust and reliable with high pumping speed/performance and is highlytolerant 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 atatmospheric pressure, and 400 m3hr‐1 at 10‐1 mbar. The E2M80 rotary pump is fitted with aMF100 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 thechamber without significant loss due to conductance limitations.A Varian VHS‐10 water cooled diffusion pump (5300 ls‐1) is supplied, and is fitted with apneumatically operated high vacuum gate valve. The effective pumping speed at thechamber 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 fittedwith a thermal snap switch and water flow switch that is interfaced to the PLC controlsystem 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 withthe Varian VHS‐10 high throughput diffusion pump, ensures that very fast pump down timesare achieved.Without the Polycold cold finger running an empty, dry chamber evacuation time to processpressures for Gold or Silver ( 1x10‐5 mbar) is typically 6‐7 minutes.VMD900DL Instruction Manual Page 8Copyright © West Technology Systems Limited 2014Under normal working parameters, with a trained operator, it is possible to complete aprocess in less than 12 minutes.Filament Support and Power SupplyThe evaporation filaments are dispersed along a line running from front to back of thechamber 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 faras 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 particularsources.Sources are mounted at approximately 1/4, 1/2, and 3/4 distance along the length of thechamber.The filament clamp fixings to the source bus bars has been designed so that changing thefilament cannot result in accidental misalignment of the mounting.The filament bar assembly is designed for straightforward removal and dismantling toenable cleaning, and is of a robust construction. The insulator design minimises thepotential problems of 'bridging' by zinc deposits.The power supply and control system is ideally suitable for raising the temperature of a pairof filaments for gold evaporation to white heat and two boats used for zinc to red heat in acontrolled manner.Instrumentation and Control SystemThe control system is straight forward to use and all regularly used controls are readilyaccessible from the operators position in front of the chamber whilst observation is madethrough the chamber view port .The Mitsubushi FX series programmable logic controller (PLC) and E1101 touch panel alphanumeric display (HMI). The control system provides a simple semi‐automatic operation ofthe vacuum system.The PLC controls the running of the vacuum pumps and the evacuation of the chamber fromatmospheric pressure to the process ready pressure using single button operation.VMD900DL Instruction Manual Page 9Copyright © West Technology Systems Limited 2014The HMI display has a simple system mimic and is mounted within the control unit to allowthe operator to easily identify system status. All controls are clearly labelled.The control system provides evaporation control via a ‘SOURCE’ . The PLC controls thechamber 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 theregeneration line and the other on the chamber) and one AIM‐S Active inverted magnetrongauge head on the chamber.The AIM‐S active inverted magnetron gauge head is automatically switched on and off at anoptimum pressure (measured by the chamber ATC‐M) to protect it from operation atunsuitably high pressures.The AIM‐S head is readily demountable and can be easily cleaned even by a relatively nontechnicaloperator 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 aPolycold 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 sectionand is self‐supporting. This system operates at <‐120 0CPlease Note: This option is highly recommended if processing exhibits with a high moisturecontent. Also for general use the presence of the cold finger significantly reduces thechamber evacuation time.VMD900DL Instruction Manual Page 10Copyright © West Technology Systems Limited 2014The location of the cold finger is such that regular cleaning by wiping the full length may beeasily carried out without obstruction, and without the need to remove any ancillarycomponents.Please Note: The cold finger can still be at temperatures of –1000C with the chamber dooropen. 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 andfully comply with the UK Health and ‘Safety at Work Act’, the ‘Control of SubstancesHazardous to Health Regulations’.Electrical LoadingThe VMD900DL system and water chiller require a 415V + neutral 3 ph, 50Hz, 63 Ampelectrical 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 themaximum acceptable inlet temperature of 25oC. This can be either mains water or from afree standing water chiller.The cooling water flow requirement is 4.3 l min‐1 for Polycold PFC552HC system (ifpurchased) at the maximum acceptable inlet temperature of 13oC. This can be either mainswater or from a free standing water chiller.Pneumatic SupplyThe compressed air requirement is 100 psi with virtually zero flow. This can be either factoryair supply or from a free standing pneumatic compressor.ExhaustThe exhaust from the E2M80 pump is vented to atmosphere through an Edwards MF100 oilmist filterPlease Note: It is recommend that this exhaust is piped away to either a fume extractionpoint or through an external wall. This exhaust line must be left unobstructed at all times.VMD900DL Instruction Manual Page 11Copyright © West Technology Systems Limited 2014SitingThe ‘Standalone’ Vacuum Metal Deposition System would normally be positioned in thelaboratory with all pumps and accessories mounted into a separate service corridor oroutbuilding to help reduce noise levels and heat output into the room and the workingenvironment.The depth of the system inside the laboratory will not be more than 3005 mm with the workholder extended for loading, and the system will not be wider than 1200 mm including thecontrol 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 separateroom to the main system. This is because both generate a heat load that would beunacceptable in a laboratory. For this reason the room that these units are sited in shouldhave adequate natural or forced ventilation.The E2M80 vacuum pump has a noise level of 70 dB (A) and this should also be consideredwhen siting this pump.Optional extrasThe closed loop water chiller should be located on a plinth either in a suitably cool and wellventilated 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 sitedin 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 mmVacuum 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 insideVMD900DL Instruction Manual Page 12Copyright © West Technology Systems Limited 2014Building WorksAll required services as indicated above should be provided within 2 metres from the chosenlocation 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 mmdeepFinish : 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 aprepared site.Site the system in a clean location and level the unit to the using the levelling jacks providedon the base. Connect all services as per instruction manual.IMPORTANT NOTICE: Failure to reconnect all services correctly could be dangerous for boththe system, system components and operator.VMD900DL Instruction Manual Page 13Copyright © West Technology Systems Limited 2014IMPORTANT NOTICE: Check direction of all motors to ensure that the 3 phase connectionsare correct.IMPORTANT NOTICE: Service or reconnection work after relocation should only be carriedout 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 includewater, pneumatics, power and vacuum pump exhaust lines.The other panels are removable to allow easy access for maintenance purposes whererequired.The design of the system has taken into account that most operators will have no or limitedknowledge 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 pumpdown and vent and sequential deposition. Vacuum pressure adjustment (for zinc layer) andsource evaporation current control are located near to the HMI.The source transformers are located behind the removable panel on the right hand side ofthe main enclosure.VMD900DL Instruction Manual Page 14Copyright © West Technology Systems Limited 2014The Programmable logic controller and all contactors and control wiring are located behindthe 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 theoperator 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 torelease 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 theVMD900DL.The HMI will start its test routine and after approximately 15 seconds will display the ‘WESTTECHNOLOGY 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 ‘INFORMATIONSCREEN’ (see later).VMD900DL Instruction Manual Page 15Copyright © West Technology Systems Limited 2014To 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 theoperator 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 pressingthe ‘START SYSTEM’ button. This button then changes to display ‘STOP SYSTEM’.VMD900DL Instruction Manual Page 16Copyright © West Technology Systems Limited 2014The 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 ‘CONTROLSCREEN’.This is the main control screen for the system. The ‘CONTROL SCREEN’ is where the operatorcarrys out the sequential deposition process.Pressing the ‘PUMP DOWN’ buttong starts the evacuation of the chamber. As it is pressedthe lengend on the button briefly changes to ‘PUMPING’ then returns to display ‘PUMPDOWN.The chamber pressure is displayed on the screen.Pressing the ‘LIGHTS OFF’ button switches on the chamber LED lamps to illuminate theinside of the vacuum chamber. When pressed the legend ‘LIGHTS OFF’ changes to ‘LIGHTSON’. Pressing the button again switches the LED lamps off (legend changes back to ‘LIGHTSOFF’).To vent the vacuum chamber the operator simply presses the ‘VENT’ button. Once pressedthe 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 usefulfor 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. Thisfeature is useful for ‘holding an exhibit at high vacuum overnight.VMD900DL Instruction Manual Page 17Copyright © West Technology Systems Limited 2014Gold/Zinc EvaporationOnce the chamber vacuum pressure reaches high vacuum pressure better than 1 x 10‐4mbar 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 theleft hand ‘SOURCE OFF’ legend changes to ‘GOLD LAYER 1’.At this point the operator can slowly adjust the located below the HMI screen and increasethe evaporation current until the boat glows a dull red colour and gold wire melts and‘wets’ the evaporation boat.Source ActivationButtonVMD900DL Instruction Manual Page 18Copyright © West Technology Systems Limited 2014Please 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 theevaporation current via the current potentiometer until the boat glows white hot and thegold will then evaporate. The evaporation should take no more than 3‐5 seconds. At the endof the evaporation the operator winds down the evaporation current to zero using thecurrent potentiometer.Pressing the ‘SOURCE 1’ button then selects the second set of gold evaporation boats, iffitted.In normal operation this evaporation source is not used but there can be circumstanceswhere the additional evaporation of gold is required. Alternatively this evaporation sourcecan be used for the process where the sequential evaporation of silver after the zincevaporation is required.When pressed the ‘SOURCE 1’ legend changes to ‘SOURCE 2’ and the ‘GOLD Layer 1’ legendchanges to ‘GOLD Layer 2’. The evaporation sequence for gold is then repeated.CurrentPotentiometerVMD900DL Instruction Manual Page 19Copyright © West Technology Systems Limited 2014If a second deposition of gold is not required then by pressing the ‘Source 1’ button twicethe 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, thisnormally takes a few seconds to stabilise at which point the legend ‘ ZINC LAYER’ willappear.Before slowly adjusting the current potentiometer, it is recommend that the operatorswitches 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. theoperator can slowly adjust the current potentiometer and increase the evaporation currentuntil the boat glows a dull red colour and the zinc foil (or granules) source material meltsand ‘wets’ the evaporation boat.At this point quickly turn the chamber lights on by pressing the ‘LIGHTS OFF’ button andobserve the surface of the exhibit being processed. The zinc will start to deposit on to thesurface 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 theoptimum fingerprint image.The deposition of the zinc on to the sample material requires experience to depositsufficient zinc to produce the fingerprint image but not too much zinc to decrease thesharpness of the fingerprint image.Please Note: If the evaporation currents is ramped up too quickly then the zinc may ‘jump’out of the boat.VMD900DL Instruction Manual Page 20Copyright © West Technology Systems Limited 2014Please Note: If the chamber pressure is too low for the zinc deposition process then thenthe ‘ZINC LAYER’ legend will not be displayed and the legend ‘PRESSURE LOW’ will appearon the screen.Please Note: If the chamber pressure is too high for the zinc deposition process then thenthe ‘ZINC LAYER’ legend will not be displayed and the legend ‘PRESSURE HIGH’ will appearon the screen.In either this case it is not possible to evaporate the zinc until the pressure condition hasbeen rectified. This is done by carefully and gradually adjusting the leak valve located on theright hand side of the chamber.VMD900DL Instruction Manual Page 21Copyright © West Technology Systems Limited 2014At the end of the zinc evaporation pressing the ‘SOURCE 3’ button will switch allevaporation sources off.Pressing the ‘VENT’ button returns the chamber to atmospheric pressure so the theprocessed 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’ (seeabove)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).VMD900DL Instruction Manual Page 22Copyright © West Technology Systems Limited 2014Data – 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 fromEnglish 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 aboveexample both vacuum pumps are running and the high vacuum valve and backing valve areopen. The legend ‘HIGH VACUUM’ shows that the system is at high vacuum. The pressuredisplay is showing 3.5 x 10‐5 mbar.VMD900DL Instruction Manual Page 23Copyright © West Technology Systems Limited 2014Pressing the ‘LIGHTS OFF’ button switches on the chamber LED lamps to illuminate theinside of the vacuum chamber. This is is useful when loading the gold wire into theevaporation boats and also when initially applying current to the zinc boats during processdeposition.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 pneumaticcompressor (if fitted). It also shows the operator whether the water supply and pneumaticair 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 thebacking, roughing and high vacuum gauge pressures. The operational status of majorVMD900DL Instruction Manual Page 24Copyright © West Technology Systems Limited 2014components (e.g. rotary vacuum pump, mechanical booster pump etc.) and the series of setpoints used in the automatic control programme.Please Note: It is possible to change the set points, however, it is strongly recommendedthat the operator does not changes any set points without first discussing with WestTechnology.Information ScreenThis screen has a number of buttons that allows the operator to find out further informationabout the system:Start Pumps – this gives a descirption of the operational sequence of the vacuum pumpswhen 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).VMD900DL Instruction Manual Page 25Copyright © West Technology Systems Limited 2014Pressure Information ScreenThis screen gives a description of how the backing, roughing and high vacuum pressuregauges work and display vacuum pressures.Service Information ScreenThis screen gives contact detail for West Technology. Contact us for service supportcontracts.Trends ScreenThis screen shows the pressure trends for the roughing and high vacuum gauges.VMD900DL Instruction Manual Page 26Copyright © West Technology Systems Limited 2014Maintenance ScreenThis screen gives gives a weekly, monthly, 3 monthly and annual maintenance schedule forthe system.Timers ScreenThis screen gives information about the diffusion high vacuum pump warm up timer (activeduring stsem start up) and the diffusion pump cool down timer ( active during system shutdown).I/O List ScreenVMD900DL Instruction Manual Page 27Copyright © West Technology Systems Limited 2014This 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 arange of other features.Process CycleLoading SamplesTo load sample materials into the chamber the operator must first release the door catchand open the door.Please Note: If the chamber has been in operation or left in a ‘sealed’ state then theoperator must press the ‘VENT’ button on the ‘Control Screen’ to return the chamber toatmospheric pressure.The operator then withdraws the workholder (using the handle) from the chamber. Withthe workholder in the fully extended position the operator then pulls the small catch pinlocated 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 setposition.The workholder has a three position latch assembly ‐ normal position, 90 degrees, 45degrees and fully inverted. Once the work holder is in its required position the catch pin canbe released to lock the work holder in position.The sample material is attached, making sure that it is smooth, to the workholder using thesmall high powered magnets. Once attached the workholder is rotated back to its normalposition.Please Note: Care should always be taken when rotating the work holder system and theoperator 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.VMD900DL Instruction Manual Page 28Copyright © West Technology Systems Limited 20142. 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 pressureDeposition 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, thebutton legend changes to ‘SOURCE 1’ and the right hand ‘SOURCE OFF’ legend belowchanges to ‘GOLD LAYER 1’.4. The operator then slowly turns the current potentiometer knob anticlockwise until thedesired 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 willtake place and cause the gold to jump out of the evaporation boat. Apply power to theevaporation boat slowly until the gold first wets the boat, then increase the power forfull evaporation. The gold will be fully evaporated by increasing the power until the boatglows 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 potentiometerknob 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 ‘SOURCE1’ button twice and the legend changes to ‘SOURCE 3’.There will be a short pause whilst the system automatically adjust the pressure in thechamber to around 3.0 x 10‐4 mbar. Once the vacuum pressure is within the definedrange for the zinc deposition then the right hand legend changes to ‘ZINC LAYER’.VMD900DL Instruction Manual Page 29Copyright © West Technology Systems Limited 2014The zinc evaporation pressure can be adjusted within predefined limits via the LV10Kfine needle valve located just below the vacuum chamber on the RHS. Turning the valveknob 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 10‐4mbar).When evaporating the zinc evaporation boat it is recommended that the chamber lightsare initally turned off.Apply the power gently until the ends of the evaporation boat starts to glow a dull redcolor, and allow to the zinc to soak at this level for a short period of time before applyingmore power to start the evaporation.Please Note: When evaporating the zinc layer is is advisable to have the chamber lightsturned on so the development of the finger print can be observed.Fingerprint development can be quite difficult to observe on certain materials. It istherefore advisable to secure a small white plastic test piece to the work holder to aidobservation.7. Once evaporation is completed the operator must return the current potentiometerknob fully clockwise to ensure that it is off.8. After finishing the zinc evaporation it is recommended that the operator switches backto the ‘GOLD LAYER 1’ and winds the current up until the gold evaporation boats areglowing white hot. This will remove any zinc contamination from the boats.9. Once evaporation is completed the operator must return the current potentiometerknob 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.VMD900DL Instruction Manual Page 30Copyright © West Technology Systems Limited 20143. Once chamber is at atmospheric pressure the air admittance valve closes and systemresets.Chamber CleaningPlease Note: A respiratory dust mask, rubber gloves and safety glasses should be used whencleaning chamber furniture.Please Note: WTSL recommend that the system is shut down prior to commencing anycleaning.Please Note: Regular cleaning of the chamber is essential to ensure that large deposits donot build up. This will make routine maintenance easier and help to keep optimumperformance from the system.To aid the cleaning process the chamber has been fitted with removable liners, onceremoved from the chamber they should be wiped down with a suitable solvent. We wouldrecommend a light scouring pad for the more stubborn deposits.With the liners removed the chamber should be vacuumed out with special attention beingtaken around the bus bars to prevent build up of deposits that can lead to electricalshorting.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 thatit will only require cleaning with a suitable solvent cleaner. This will prevent any scratchingof the lamp during cleaning.VMD900DL Instruction Manual Page 31Copyright © West Technology Systems Limited 20148. 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 whencleaning the chamber, chamber furniture, vacuum valves, vacuum gauges etc.Please Note: Gauges must be cleaned in accordance with the manufacturers instructions.VMD900DL Instruction Manual Page 32Copyright © West Technology Systems Limited 20149. 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 HeadWTS/14641000ATC‐M‐1/8” Active Thermocouple VacuumGauge HeadWTS/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/250GUnitrans世聯翻譯公司在您身邊,離您近的翻譯公司,心貼心的專業服務,專業的全球語言翻譯與信息解決方案供應商,專業翻譯機構品牌。無論在本地,國內還是海外,我們的專業、星級體貼服務，為您的事業加速！世聯翻譯公司在北京、上海、深圳等國際交往城市設有翻譯基地，業務覆蓋全國城市。每天有近百萬字節的信息和貿易通過世聯走向全球！積累了大量政商用戶數據，翻譯人才庫數據，多語種語料庫大數據。世聯品牌和服務品質已得到政務防務和國際組織、跨國公司和大中型企業等近萬用戶的認可。 專業翻譯公司,北京翻譯公司,上海翻譯公司,英文翻譯,日文翻譯,韓語翻譯,翻譯公司排行榜,翻譯公司收費價格表,翻譯公司收費標準,翻譯公司北京,翻譯公司上海。