• Created : 
  • Modified : 
  • Category :  Agilent Knowledge Portal
  • Entry Type :  Article
  • Product Type :  GC/MS Systems
  • Component :  GC/MS Data Acquisition Software GC/MS Single Quadrupole
  • Product Name :  5973 Series GC/MSD 5975 Series GC/MSD 5977 Series GC/MSD OpenLab CDS
  • Task :  Operation Troubleshooting
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Switching Filament in the GC/MSD Using OpenLab CDS

Answer

This Information Applies To: Agilent GC/MSD systems with EI sources controlled by OpenLab CDS software

Issue

Switching filaments in the GC/MSD if a filament is burnt out or similar issue.

Background

In Electron Ionization (EI) sources, filaments provide a stream of electrons that ionize compounds as they enter the source. Filaments are consumable items, so Agilent Electron Ionization (EI) sources have a second spare filament that the user can switch to via software without having to vent and open the analyzer chamber.

Items Required

  • High temperature filament for Stainless, Inert, or Extractor Source type, 1/pk (p/n G7005-60061)
  • Filament assembly for High Efficiency Source, 1/pk (p/n G7002-60001)

Steps to Follow

  
Tips: To perform this procedure from the instrument status dashboard, the instrument must not be locked for tune control.
  1. Load a method specifying the tune file that uses a bad or blown filament.
  2. Verify that the MSD is idle and not locked for tuning.
  3. Select Instrument Status > Dashboard.
  4. Right-click the MSD panel, then click Switch Filament (Figure 1).


    Select Switch Filament under MSD panel.
    Figure 1. Select Switch Filament under MSD panel 

  5. You are prompted "Do you want to start Autotune after switching the filament?" Click Yes, No or Cancel to continue.
    Yes - Switches to the spare filament and starts an autotune.
    No - Switches to the spare filament only without running an autotune.
      
    Caution: For optimum instrument performance, Agilent recommends always running an autotune after switching filaments. Running an autotune also ensures that a complete PDF tune report will accompany subsequent data acquisition files instead of a report that only shows the tune parameters.
  6. If you select Yes, the Autotune runs and an autotune report is opened at the end of the run. Examine this autotune report and when prompted, click Yes to save the autotune file and release the tune control, or No to release the tune control without saving the tune file.
      
    Tips: Once saved, all methods that use this tune file will now use the working filament. If other methods specify different tune files that still use the bad filament, those tune files must also be updated to use the correct filament, as described above.

     

      Learn how to effectively operate your Agilent GC/MSD with OpenLab CDS:
    Agilent 5977 GC/MSD with OpenLab CDS eLearning path available from Agilent education
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