Pfeiffer Vacuum OmniStar GSD 350 User Manual (English)

Questions and Answers:

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amandahardinAug 19, 2025
How to fix a dark display on Pfeiffer Vacuum Measuring Instruments?
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  Christopher GonzalesSep 12, 2025
  If the display remains dark after switching on your Pfeiffer Vacuum Measuring Instruments, there might be several reasons: * There is no supply voltage at the unit. Check the mains connection and mains cable. * The mains fuses (2×10 AT) are defective. Replace the mains fuses. * The display cable is loose. Check the plug-and-socket connection on the display and on the PoE in the GSD 350. * The power supply cable between PoE and supervisor board is loose. Check the plug-and-socket connection of the power supply cable between PoE and supervisor board.
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joshua68Aug 21, 2025
Why does the turbopump switch off in Pfeiffer Vacuum OmniStar GSD 350?
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  royjonathanAug 21, 2025
  The turbopump in your Pfeiffer Vacuum Measuring Instruments might be switching off due to several reasons: * Overtemperature: Check the fans and service the turbopump. * Inlet pressure too high: Reduce the pressure on the inlet side of the capillary to < 1200 hPa. * Leakage: Check the capillary seal in the gas inlet area. * Fore-vacuum pressure too high: Check the vacuum connection diaphragm pump/turbopump for leakages. * Condensate in the diaphragm pump: Dismantle and clean the diaphragm pump and wipe the diaphragm pump parts dry. * Diaphragm pump defective: Service the diaphragm pump or replace it.
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Michele TateAug 23, 2025
Why is the turbopump failing to reach nominal rotation speed in Pfeiffer Vacuum Measuring Instruments?
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  smithjeffreyAug 23, 2025
  If, after the "Pump down" control command, the turbopump fails to reach the nominal rotation speed (icon remains dark green) on your Pfeiffer Vacuum Measuring Instruments, consider the following: * The run-up time of the turbopump may not be completed. Wait for the run-up time of < 8 minutes to complete. * The inlet pressure may be too high (only for ThermoStar). Reduce the pressure on the inlet side of the capillary to < 1200 hPa. * There may be a leakage. Check the capillary seal in the gas inlet area. * The fore-vacuum pressure may be too high. Check the vacuum connection diaphragm pump/turbopump for leakages.
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Mary GarzaAug 26, 2025
What to do if the Dashboard start screen doesn't appear on Pfeiffer Vacuum OmniStar GSD 350 Measuring Instruments?
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  Jeremy FordAug 26, 2025
  If the "Dashboard" start screen does not appear after switching on your Pfeiffer Vacuum Measuring Instruments, it could be due to these reasons: * The run-up time has not completed. Wait for the run-up time of approximately 60 seconds to complete. * The unit was switched off and back on again too quickly. Turn off the unit, wait for 15 seconds, and then switch it back on again. * The Ethernet cable between PoE and supervisor board is loose. Check the plug-and-socket connection of the Ethernet cable between PoE and supervisor board.
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sandrajarvisAug 27, 2025
Why does the diaphragm pump switch off in Pfeiffer Vacuum OmniStar GSD 350?
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  Ashley DavisAug 27, 2025
  The diaphragm pump in your Pfeiffer Vacuum Measuring Instruments might switch off due to: * Overtemperature. Check the fans and service the diaphragm pump. * A loose cable connection. Check the plug-and-socket connections on the diaphragm pump and the supervisor board. * A defective diaphragm pump. Service or replace the diaphragm pump.
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Ricardo RamirezAug 29, 2025
What to do if the turbopump fails to start after the pump down command in Pfeiffer Vacuum OmniStar GSD 350?
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  qrussoAug 29, 2025
  If the turbopump fails to start up (icon remains light gray) after the "Pump down" control command in your Pfeiffer Vacuum Measuring Instruments, consider the following: * The switch-on vacuum of 10 hPa may not have been reached yet. Wait for the pump down action for the fore-vacuum to complete (target < 60 s). * There may be condensate in the diaphragm pump. Dismantle and clean the diaphragm pump and wipe the diaphragm pump parts dry. * The diaphragm pump may be defective. Service or replace the diaphragm pump. * There may be a loose cable connection. Check the plug-and-socket connections of the electronic drive unit and the supervisor board. * The turbopump may be defective. Replace the turbopump.
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richardsonmeganSep 1, 2025
Why do both vacuum pumps switch off and the system shuts down in Pfeiffer Vacuum Measuring Instruments?
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  sandersgarrettSep 1, 2025
  If both vacuum pumps switch off and the system automatically shuts down in your Pfeiffer Vacuum Measuring Instruments, it could be due to: * Overtemperature. Check the fans, clean the protection screens on the fans, and keep to the permissible ambient temperature. * Sealing gas pressure too low (for corrosive gas version). Check the sealing gas supply.
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Ellen BryantSep 3, 2025
What to do if diaphragm pumps fail to start after the pump down command in Pfeiffer Vacuum Measuring Instruments?
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  Jaime WolfSep 3, 2025
  If the diaphragm pumps fail to start up (icon remains light gray) after the "Pump down" control command in your Pfeiffer Vacuum Measuring Instruments, check the following: * A loose cable connection. Check the plug-and-socket connections on the diaphragm pump and the supervisor board. * A defective diaphragm pump. Service or replace the diaphragm pump. * Sealing gas pressure too low (for corrosive gas version). Check the sealing gas supply.
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lsparksSep 5, 2025
What to do if the pressure is too low in the vacuum chamber of Pfeiffer Vacuum OmniStar GSD 350 Measuring Instruments?
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  Alexandria MorrisSep 5, 2025
  If the pressure in the vacuum chamber is too low (< 1 × 10-6 hPa) for ThermoStar and/or OmniStar Pfeiffer Vacuum Measuring Instruments with open metering valve: * Increase the pressure on the inlet side of the capillary if the inlet pressure is too low. * Trim or replace the capillary if it is blocked. * Replace the orifice if it is blocked.
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casey21Sep 7, 2025
What to do if the pressure is too high in the vacuum chamber of Pfeiffer Vacuum Measuring Instruments?
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  margaretjacksonSep 7, 2025
  If the pressure in the vacuum chamber with the metering valve shut off is > 1 × 10-7 hPa (only for OmniStar) in your Pfeiffer Vacuum Measuring Instruments, consider the following: * Continue pumping down if the system has not been running for long. * Bake out the vacuum chamber if the moisture content in the vacuum system is too high. * Replace the valve block if the inlet valve is not tight. * Check the vacuum connection diaphragm pump/turbopump for leakages if the fore-vacuum pressure is too high. * Dismantle and clean the diaphragm pump and wipe the diaphragm pump parts dry if there is condensate in the diaphragm pump. * Service or replace the diaphragm pump if it is defective.

Pfeiffer Vacuum OmniStar GSD 350 Specifications

General

Type	Quadrupole Mass Spectrometer
Power Supply	100-240 V AC, 50/60 Hz
Mounting Flange	DN 40 CF
Interface	RS-232, Ethernet
Detection Limit	1x10^-14 mbar
Measurement Modes	Partial pressure measurement, Total pressure measurement
Applications	Vacuum process monitoring, Leak detection, Residual gas analysis
Resolution	Unit mass resolution
Ion Source	Electron Impact (EI)
Detector	Faraday cup / Secondary electron multiplier
Detectable Gases	All gases and vapors