VacTran 3 Manual (779748), страница 14
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Delivered speed shows the effect of the conductance elements in each pump station. The totalrange of pressure for this graph is governed by the global Start and Target pressure.recommended axis settings:Y log-X logwhen dimmed:No station active© 2011 Professional Engineering Computations114VacTran 38.5.13 Compare stations: Conductance vs pressureTotal conductance vs pressure for each active station is calculated based on adding station conductances in series.The pressure range of the calculation will be based on the global Start and Target Pressures. to change thesevalues, click on the Vacuum Vessel icon.recommended axis settings:Y linear- X logY log-X logwhen dimmed: No conductances in current pump station, no station active© 2011 Professional Engineering ComputationsSystem models1158.5.14 Compare stations: Throughput vs pressureTotal conductance throughput vs Pressure for each active pump station is calculated bay adding each station'sconductances in series.
For each pressure increment, total conductance is multiplied by the current pressure toobtain throughput. For example, if the conductance is 1000 liters/second at 10 torr, the throughput at this pressurewill be 10,000 torr-liters/second. The pressure range of the calculation will be based on the global Start and TargetPressures.recommended axis setting:Y log-X logwhen dimmed: No conductances in current pump station, or no station active© 2011 Professional Engineering Computations116VacTran 38.5.15 Compare stations: Pump speed vs pressurePump speed vs pressure is calculated for each active pump station.
The total range of pressure for this graph isgoverned by the pressure ranges for each station.Recommended axis settings:Y linear- X logY log-X logwhen dimmed: No station active, no pumps in station© 2011 Professional Engineering ComputationsSystem models1178.5.16 Compare stations: Pump throughput vs pressurePump throughput vs pressure is calculated for each active pump station.
The total range of pressure for this graphis governed by the pressure ranges for each station.recommended axis settings:Y log-X logwhen dimmed:No station active, no pumps in station© 2011 Professional Engineering Computations118VacTran 38.5.17 Compare stations: Delivered speed vs pressurePump delivered vs pressure is calculated for each active pump stations. Delivered speed shows the effect of theconductance elements in each pump station. The total range of pressure for this graph is governed by the globalStart and Target pressure.recommended axis settings:Y linear- X logY log-X logwhen dimmed:No station active© 2011 Professional Engineering ComputationsSystem models1198.5.18 Compare stations: Delivered throughput vs pressurePump delivered throughput vs pressure is calculated for each active pump stations.
Delivered throughput shows theeffect of the conductance elements in each pump station. The total range of pressure for this graph is governed bythe global Start and Target pressure.recommended axis settings:Y linear- X logY log-X logwhen dimmed:No station active© 2011 Professional Engineering Computations120VacTran 38.5.19 This station: Compare conductance vs pressureCalculate conductance vs pressure for each of the conductance elements in the current pump station. The totalpressure range for the graph will be the start and stop pressures for the station.recommended axis settings:Y linear- X logY log-X logwhen dimmed:No conductances in current pump station© 2011 Professional Engineering ComputationsSystem models1218.5.20 This station: Compare throughput vs pressureCalculate throughput vs pressure for each of the conductance elements in the current pump station.
The totalpressure range for the graph will be the start and stop pressures for the station.recommended axis settings:Y log-X logwhen dimmed:No conductances in current pump station© 2011 Professional Engineering Computations122VacTran 38.5.21 This station: Compare pump speeds vs pressureCalculate pump speed vs pressure for each of the pumps in the current pump station. The total pressure ranges ofall the pumps in the pump station will govern the total pressure range for the graph.
In other words, the graph willshow complete curves for each of the pumps in the pump station.recommended axis settings:Y linear- X logY log-X logwhen dimmed:No pumps in current pump station© 2011 Professional Engineering ComputationsSystem models1238.5.22 This station: Compare pump throughput vs pressureCalculate pump throughput vs pressure for each of the pumps in the current pump station. The total pressureranges of all the pumps in the pump station will govern the total pressure range for the graph. In other words, Thegraph will show complete curves for each of the pumps in the pump station.recommended axis settings:Y log-X logwhen dimmed:No pumps in current pump station© 2011 Professional Engineering Computations124VacTran 38.5.23 This station: Conductance vs pressureCalculate conductance vs pressure for the current pump station, bounded by the start and stop pressure settings forthis pump station.recommended axis settings:Y linear-X logY log-X logwhen dimmed:No conductances in current pump station© 2011 Professional Engineering ComputationsSystem models1258.5.24 This station: Throughput vs pressureCalculate conductance throughput vs pressure for the current pump station, bounded by the start and stop pressuresettings for this pump station.recommended axis settings:Y log-X logwhen dimmed:No conductances in current pump station© 2011 Professional Engineering Computations126VacTran 38.5.25 This station: Pump speed vs pressureCalculate the combined pump speed vs pressure for all the pumps in the current pump station, bounded by the startand stop pressure settings for this pump station.recommended axis settings:Y linear-X logY log-X logwhen dimmed:No pumps in current pump station© 2011 Professional Engineering ComputationsSystem models1278.5.26 This station: Pump throughput vs pressureCalculate the combined pump throughput vs pressure for all the pumps in the current pump station, bounded by thestart and stop pressure settings for this pump station.recommended axis settings:Y log-X logwhen dimmed:No pumps in current pump station© 2011 Professional Engineering Computations128VacTran 38.5.27 This station: Delivered speed vs pressureCalculate the combined delivered speed vs pressure for all the pumps in the current pump station, using theconductances in the current conductance list, bounded by the start and stop pressure settings for this pumpstation.
The example shows a graph of a pump station that is severely conductance limited. In other words, theconductance elements constrict flow to the point that very little of the pump capacity is useful at lower pressures.recommended axis settings:Y linear- X logY log-X logwhen dimmed:No conductances in current pump station, no pumps in current pump station© 2011 Professional Engineering ComputationsSystem models1298.5.28 This station: Delivered throughput vs pressureCalculate the combined delivered throughput vs pressure for all the pumps in the current pump station, using theconductances in the current conductance list, bounded by the start and stop pressure settings for this pumpstation.recommended axis settings:Y log-X logwhen dimmed:No conductances in current pump station, no pumps in current pump station, no station active© 2011 Professional Engineering Computations130VacTran 38.5.29 This station: Generate Pump Model...Create a new pump model from the current pump station.
The pump model data will be based on the deliveredspeed vs pressure curve for the pump station. A Save dialog will appear, prompting for the name of the new pumpmodel. This new model will be stored under the new name in a separate file on disk, and will not affect the currentsystem model or pump station.recommended axis settings:Y linear- X logwhen dimmed:No conductances in current pump station, no pumps in current pump station, no station active© 2011 Professional Engineering ComputationsSystem models1318.5.30 This station: Generate Raw Conductance Model...Create a new raw data conductance model from the conductance elements in the current pump station. The datawill be based on the combined conductance vs pressure curve for the pump station, assuming all conductanceelements are in series.
A Save dialog will appear, prompting for the name of the new raw data conductance model.This new model will be stored under the new name in a separate file on disk, and will not affect the current systemmodel or pump station.recommended axis settings:Y log - X logwhen dimmed:No conductances in current pump station, station not active© 2011 Professional Engineering Computations1328.6VacTran 3System model valvesConductance bypass gate valves: Click on one of the bypass gate valves to toggle the connection settingbetween the pump and the vessel.
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