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2.9 Emergency shutdown of the mass spectrometer .......................................................................... 40
3 Changing the mode of operation ............................................................................42
3.1 Changing the inner source assembly from EI to CI operation....................................................... 42
3.2 Changing the inner source assembly from CI to EI operation....................................................... 46
4 Maintenance procedures .........................................................................................51
4.1 Maintenance schedule .................................................................................................................. 51
4.2 Spare parts.................................................................................................................................... 53
4.3 Safety and handling ...................................................................................................................... 53
4.4 Preparing the instrument for working on the source ..................................................................... 54
sources ..........................................................................................................................................54
4.5 Preparing the GC oven for working on the capillary column ......................................................... 55
4.6 Removing and refitting the source components............................................................................ 55
4.6.1 Removing the inner source assembly from the instrument.................................................. 56
4.6.2 Removing the mounting flange assembly from the instrument............................................ 58
4.6.3 Removing the outer source assembly from the instrument ................................................. 59
4.6.4 Fitting the outer source assembly to the instrument ............................................................ 62
4.6.5 Fitting the mounting flange assembly to the instrument ...................................................... 63
4.6.6 Fitting the inner source assembly to the instrument ............................................................ 64
4.7 Cleaning the inner source components......................................................................................... 65
4.7.1 Disassembling the inner source for cleaning ....................................................................... 66
4.7.2 Cleaning the repeller and the ionization chamber ............................................................... 69
4.7.3 Assembling the inner source after cleaning......................................................................... 70
4.8 Replacing the inner source assembly filament.............................................................................. 73
4.8.1 Replacing the filament ......................................................................................................... 73
4.9 Cleaning the outer source assembly's lenses ............................................................................... 77
4.9.1 Removing the PCB holder assembly from the lens holder .................................................. 78
4.9.2 Removing the lenses and the spacers from the lens holder................................................ 81
4.9.3 Cleaning the lenses ............................................................................................................. 84
4.9.4 Fitting the lenses and the spacers into the lens holder........................................................ 86
4.9.5 Fitting the PCB holder assembly to the lens holder............................................................. 90
4.10 Replacing the reference gas ampule .......................................................................................... 93
April 27, 2020, 715005564 Ver. 01 (previously released as Rev. A)
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