VacTran 3 Manual, страница 43

Thissometimes happens on non-US Windows installations.There are two help files, both in English. One provides interactive help from withinVacTran, the other is a PDF formatted manual with the same information. The interactive help file isnamed VacTran3.chm. The PDF file is named VacTran 3 Manual.pdf. The default installation locationfor the help files is c:/Program Files/Common Files/PEC.If you search for these files using the Windows Search function and find them in another location, youcanreset the location in VacTran using "Help|Set interactive help file..." and"Help|Set PDF help manual..." The interactive help will then be available throughout the program.How do I add parallel conductance elements to a system model?The conductance list in a system model adds each element in series.

To add elements in parallel,create a Parallel Conductance Model. This parallel conductance model gets saved as a separate file.Add conductance elements into the parallel conductance model, save it, and then insert it into thesystem model. The conductance elements that are embedded into the parallel will be added in parallelfor subsequent system model calculations.© 2011 Professional Engineering ComputationsReferences22427References1) O’Hanlon, John F., A User Guide To Vacuum Technology, John Wiley and Sons, 19802) Roth, A., Vacuum Technology, Second Ed., El Sevier Science Publishers B.V., 19823) Dushman, Saul, Scientific Foundations of Vacuum Technique, John Wiley and Sons, 19624) Steinherz, H.A., Handbook of High Vacuum Engineering, Reinhold Publishing Corporation, 19635) Crane Co., Flow of Fluids Through Valves, Fittings, and Pipe, Technical Paper N0.

410, 19856) Naundorf, Charles H., A Graphical Determination of Vacuum Chamber Pump Down Time, AVS SeventhNational Symposium on Vacuum Technology Transactions, Pergamon Press, 19607) Dayton, B. B., Relations Between Size of Vacuum Chamber, Outgassing Rate, and Required Pumping Speed,AVS Sixth National Symposium on Vacuum Technology Transactions, Pergamon Press, 19598) Santeler, Donald J., New Concepts in Molecular Gas Flow, J. Vac.

Sci. Technol. A. , Vol. 4, No. 3, May/June19869) Van Atta, C.M., Vacuum Science and Engineering, McGraw-Hill, 196510) Chamber, Fitch and Halliday, Basic Vacuum Technology, Adam Hilger, 198911) Holland, Steckelmacher, and Yarwood, Vacuum Manual, E. & F.N. Spon, 197412) Peacock, R.N., Practical selection of elastomer materials for vacuum seals, J.Vac.Sci. Technology, 17(1), Jan/Feb, 198813) Lafferty, J.M., Foundations of Vacuum Science and Technology, John Wiley and Sons, 199814) Berman, Armand, Vacuum Engineering Calculations, Formulas, and Solved Exercises, Academic Press, Inc,199315) Santeler, Donald J., Exit Loss in viscous tube flow, J. Vac. Sci.

Technol. A. , Vol. 4, No. 3, May/June 1986© 2011 Professional Engineering Computations428VacTran 3Index-AActivating a conductance study207Active pump395Add cond volume135Adding conductances146, 148, 152, 153, 155, 157,159, 163, 165, 167, 169, 176, 181, 183, 187, 189Adding gas loads193, 194, 195, 196, 198, 200, 202Adding raw data gas loads202American Vacuum Society55Annular pipe148, 340Annular pipe efficiency342Annulus340, 342Annulus entry dialog148Aperture312Available range396Average pump speed377AVS55Axis type281-BBacking pump397Bend336Bend calculations336Body transmission probabilityBugs18324-CCalculations209, 270, 301, 303, 304, 305, 306,307, 308, 310, 312, 313, 314, 316, 319, 321, 322, 325,326, 327, 329, 334, 335, 336, 337, 340, 343, 346, 350,364, 365, 366, 367, 368, 370, 389Calculator46Calculator tool button53Caveats236, 246, 252, 301CD contents21Choked flow314, 398Choosing entrance and exit loss options319Circular orifice312Colors279Combination conductances152Combining pumps79Compare conductance throughput121Compare conductances in station120Compare gas loads105Compare pump speeds in station122Compare pump throughput in station123Comparison of long pipe equations349Concepts55, 63, 91, 310, 316, 325, 385Conductance133, 148, 152, 153, 155, 157, 159,163, 165, 167, 169, 181, 183, 187, 189, 308, 312, 313,319, 335, 346, 350, 398, 405Conductance element400Conductance list401Conductance model: about203Conductance model: creating204Conductance model: editing403Conductance palette146, 405Conductance studies205Conductance study207, 209, 210, 213Conductance vs pressure108Cone153, 350, 355, 356, 358, 360, 362Cone entry dialog153Conical conductance153Conical pipe153, 355, 356, 358, 360, 362Conical pipe calculations350Conical pipe examples355, 356, 358, 360, 362Constant conductance155Constant entry dialog155Constant gas load195Contents12Copyright notice17Creating97, 204, 227, 241, 248, 253, 266, 301Creating Pump Models65-DDecay time368, 408Default settings276, 277, 278, 279, 280, 281, 282,283, 284, 285, 286, 287, 288, 289, 290, 293, 295, 298Delivered pump speed307Delivered speed379, 405Delivered speed vs pressure112Delivered throughput vs pressure113Design margins62Digitizer71Dynamic viscosity313© 2011 Professional Engineering ComputationsIndex-EElbow calculations335Elbow conductance157Elbow Entry Dialog157Ellipse346, 348Ellipse entry dialog159Elliptical pipe346Elliptical pipe conductance159Elliptical pipe efficiency348Entrance and exit losses321Entrance losses319Entrance transmission probability324Environment295, 298Equivalent length313, 325, 326, 327, 329, 331Example234, 239, 247, 321Example backing pump problem213Example pump75, 77, 79Excel87Exit losses319Exit transmission probability324Expander358, 362Exponential out gas367Exponential out gas entry dialog194Exporting pump data to excel87-FFAQs423Fixed rate leak195Flow randomizers316Flow regimes310, 406Format234, 244, 251, 258, 264, 272Formula238Formulas301, 303, 304, 305, 306, 307, 308, 310,312, 313, 314, 316, 319, 321, 322, 325, 326, 327, 329,334, 335, 336, 337, 340, 343, 346, 350, 364, 365, 366,367, 368Frequenty Asked Questions423-GGallery46, 278Garph Gallery tool buttonGas26554© 2011 Professional Engineering Computations429Gas load133, 240, 364, 365, 366, 367, 368, 407,413Gas load decay time408Gas load palette193Gas load start and stop time240Gas load start time410Gas load stop time412Gas load throughput364Gas load vs time106Gas loads193, 194, 195, 196, 198, 200, 202Gas model266, 268, 269, 270, 271, 272, 407Gas throughput vs time104General conductance formula312General conductance formula - viscous flow313Generate pump model130Geometric equivalency331Geometry-specific conductance cases334, 335,336, 337, 339, 340, 342, 343, 345, 346, 348, 349, 350Glossary395, 397, 398, 400, 401, 405, 406, 407,408, 410, 412, 413, 414, 415, 417, 418, 419, 420, 421,422Goals of vacuum systems56Graph controls276, 277, 278, 279, 280, 281, 282,283, 284, 285, 286, 287, 288, 289, 290Graph gallery46-HHand calculations370, 372, 373, 374, 377, 379,383, 385, 386, 389, 392Help system35How is VacTran organized?26How to calculate backing pump speed212-IIdeal system413Impatient?13Importing pump files80Incremental pressure calculationIncrements373, 392, 413Installation21Introduction24, 63, 91-LLeak413Leak entry dialog195306430VacTran 3Legend290Libraries235, 245, 252, 259License agreement19Line style283Linear scale287Log scale286Long expanding cone358Long expanding pipe358Long pipe312, 349Long reducing cone356Long reducing pipe356-P--MMain menu37Math calculator46Maximize range of pump stationMean free path315, 414Mechanical pump75Miter calculations335Miter conductance163Miter entry dialog163Modeling pumps64, 90Molecular flow312Molecular flow equivalent length145329-NNew features in version 331-OOpening233, 243Operating range414Orifice312, 414Orifice conductance165Orifice entry dialog165O-ring252O-ring entry dialog196O-ring library252, 253, 255, 256, 258Out gas198, 235, 242, 244, 365, 415Out gas data237Out gas entry dialog198Out gas library235, 236, 237, 238, 239, 240, 241,242, 243, 244Out gassing367Parallel415Parallel conductance formula209Parallel conductances308Pemeation library245, 246, 247, 248, 249, 250, 251Permeation245, 366, 415Permeation element196Permeation entry dialog200Pipe259, 260, 261, 264Pipe bend conductance167Pipe bend entry dialog167Pipe conductance169, 312Pipe contraction350Pipe entry dialog169Pipe expansion350Pipe library259, 260, 261, 262, 263, 264Pipe molecular flow312Pipe reducer350Points288Preset styles277Pressure Rise vs Time107Problems with USB key22Pump63, 64, 65, 80, 87, 97, 133, 395, 397Pump curve digitizer46Pump Curve Digitizer tool button52Pump dialog commands67Pump dialog description66Pump digitizer71Pump down time102, 304, 383, 389, 413Pump down time, no losses103Pump speed417Pump speed vs pressure110Pump station140, 145, 176, 417Pump station models176Pump station settings141, 143Pump throughput417Pump throughput vs pressure111Pumps66, 67, 68, 69, 74, 90Pumps (open existing)70-RRandomizers316Rate of rise107, 417Raw data conductance181, 417© 2011 Professional Engineering ComputationsIndexRaw data conductance models181Raw data gas load224, 225, 226, 227, 228, 229,230, 232, 233, 234Rectangle337Rectangle entry dialog183Rectangular pipe conductance183Rectangular pipe efficiency339Reducer356, 360References427Renaming pump stations145Right-click94, 139, 176, 232Right-click (pumps)69Roots pump77-SScreen capture418Selected gas418Selected range419Series conductance formula209Series conductance model419Series conductances308Short expanding cone362Short expanding pipe362Short reducing cone360Short reducing pipe360Simple system study13, 94Simple system study tool button46Slit conductance187Slit entry dialog187Sonic flow314, 398Start pressure420Start time240, 410Start up screen33Station active135Station conductance vs pressure124Station Delivered Speed vs pressure128Station delivered throughput vs pressure129Station pump speed vs pressure126Station pump throughput vs pressure127Station settings141, 143Station throughput vs pressure125Stop time240, 412Summary of conductance study functions210System model96, 97, 99, 132, 135, 137, 139, 141,143, 401, 420System model components92System model graphing options101© 2011 Professional Engineering ComputationsSystem model lists133System models91-TTarget Pressure420Throughput417Throughput vs pressure109Tool bar36Tools46, 94Total volume305Trademark17Traditional calculation methods62Transition flow314Transmission probability322, 324Triangle343, 345Triangle entry dialog189Triangular pipe343Triangular pipe conductance189Triangular pipe efficiency345Tube conical reducer350-UUninstalling VacTran21Units236, 246, 293USB Key22-VVacTran 2 pumps80Vacuum55Vacuum environment421Vacuum pump422Vacuum system design61Valves132Vessel volume413, 422Viscous body equivalent length329Viscous entrance equivalent length327Viscous exit equivalent length329Viscous flow313, 326, 327, 329Volume422Volume area calculator46Voolume area calculator tool button47431432VacTran 3-WWhat does VacTran do?24When are different types of models used?27Where are the model's dependencies?29© 2011 Professional Engineering Computations.