Agilent Technologies 5975C TAD VL MSD Troubleshooting And Maintenance Manual page 49

High foreline pressure
• Excessive carrier gas flow (typically > 5 mL/min)
• Excessive solvent volume injected
• Large vacuum leak
• Severely degraded foreline pump oil (standard foreline pump)
• Collapsed or kinked foreline hose
• Foreline pump is not working correctly
• Foreline gauge is not working correctly (diffusion pump MSD only)
Internal MS communication fault
• MSD electronics are not working correctly
Lens supply fault
• Electrical short in the analyzer
• MSD electronics are not working correctly
Log amplifier ADC error
• MSD electronics are not working correctly
No peaks found
• Emission current was set to 0
• Electron multiplier voltage is too low
• Amu gain or offset is too high
• Poor mass axis calibration
• Amu gain or offset is too high
• Calibration vial(s) empty or almost empty
• Excessive pressure in the analyzer chamber
• Air leak
• Electron multiplier voltage is too low
• Signal cable is not connected
5975 Series MSD Troubleshooting and Maintenance Manual
General Troubleshooting
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