Pfeiffer Vacuum OmniStar GSD 350 User Manual (English)

Questions and Answers:

M
michaelgardnerSep 9, 2025
What to do if the metering valve fails to open in Pfeiffer Vacuum OmniStar GSD 350?
- K
  Kathy McgrathSep 9, 2025
  If the metering valve fails to open (only for OmniStar) in your Pfeiffer Vacuum Measuring Instruments, consider the following: * Wait for the delay time of < 15 seconds to complete, if the delay time for valve opening has not yet completed. * Check the plug-and-socket connections on the metering valve and the supervisor board if the metering valve is not controlled. * Replace the valve block if the metering valve is contaminated. * Replace the valve block if the metering valve is faulty.
J
Joseph SmithSep 12, 2025
What to do if the venting valve fails to open after the Vent command in Pfeiffer Vacuum OmniStar GSD 350?
- J
  Jennifer EsparzaSep 12, 2025
  If, after the "Vent" control command, the venting valve fails to open on your Pfeiffer Vacuum Measuring Instruments, consider the following: * Wait until the turbopump’s rotation speed is < 750 Hz if the turbopump rotation speed is still > 750 Hz. * Check the plug-and-socket connections on the venting valve and the supervisor board if the venting valve is not controlled. * Replace the venting valve if it is polluted. * Replace the venting valve if it is defective.
A
Aaron AndersonSep 14, 2025
Why are no mass peaks visible when calibrating the mass scale on Pfeiffer Vacuum OmniStar GSD 350 Measuring Instruments?
- O
  omaloneSep 14, 2025
  If no mass peaks are visible in range > 200 u when calibrating the mass scale (for version with calibration unit) on your Pfeiffer Vacuum Measuring Instruments, it could be due to: * Low sensitivity of the mass spectrometer. Read the mass spectrometer operating instructions for details. * Low stock of calibration medium. Top up the calibration medium. * Shut-off valve on calibration unit is not controlled. Check the plug-and-socket connections on the shut-off valve and the supervisor board. * Shut-off valve on calibration unit polluted. Replace shut-off valve on calibration unit. * Shut-off valve on calibration unit defective. Replace shut-off valve on calibration unit.

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