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Slide #1 6890 GC Detectors - The Flame Ionization Detector.

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Presentation on theme: "Slide #1 6890 GC Detectors - The Flame Ionization Detector."— Presentation transcript:

1 Slide # GC Detectors - The Flame Ionization Detector

2 Slide # GC Detectors - The Flame Ionization Detector - Main Components Igniter Teflon Insulator Collector Interconnect/Spring Electrometer Jet Heater/Sensor Assembly Detector Base Assembly Column Adapter

3 Slide # GC Detectors - The Flame Ionization Detector

4 Slide # GC Detectors - The Flame Ionization Detector - Theory of Operation 1. H2 - Air Flame 2. Sample is burned in flame 3. When burned produces charged Ions 4. Ions attracted to collector 5. Collector current converted to output via Electrometer

5 Slide # GC Detectors - The Flame Ionization Detector FID EPC Flow Manifold Detector Pneumatic Connection Gas Connections to GC FID Flow Measurement Tool FID Jet Plugged FID Jet

6 Slide # GC Detectors - The Flame Ionization Detector Complete Detector Assembly FID Collector Removal FID Igniter Replacement

7 Slide #7 Jet TypePart NumberJet Tip id CapillaryG mm 0.011" High TempG mm 0.018" Jet TypePart NumberJet Tip id Capillary mm 0.011" Packed mm 0.018" Packed Wide bore " High Temp Capillary mm 0.018" Jets for Capillary-Optimized FID Jets for Adaptable FID 6890 GC Detectors - The Flame Ionization Detector - Jets

8 Slide # GC Detectors - The Flame Ionization Detector

9 Slide # GC Detectors - The Flame Ionization Detector

10 Slide # GC Detectors - The Flame Ionization Detector 6890 EPC Module Original Design New Detector Mini-fold

11 Slide # GC Detectors - The Flame Ionization Detector

12 Slide # GC Detectors - The Flame Ionization Detector

13 Slide # GC Detectors - The Flame Ionization Detector

14 Slide # GC Detectors - The Flame Ionization Detector

15 Slide # GC Detectors - The Flame Ionization Detector

16 Slide # GC Detectors - The Flame Ionization Detector

17 Slide # GC Detectors - The Flame Ionization Detector Flame won't light Measure Flows Clean/Replace Jet (6850 Jet Test) Are column and fittings tight ? Is the tank pressure high enough ? Is the Detector ON ?

18 Slide # GC Detectors - The Flame Ionization Detector Noisy Baseline Turn off Air/H2 Replace Detector Board/ interconnect/ Teflon Insulators Electronic/Mechanical Problem Still Noisy Check: Filters,Traps,Gasses Clean Jet Verify Column max Contamination problem Yes No

19 Slide #19 HP Flame Ionization Detector Planned Maintenance - Replace Jet (per Customer) - Clean/Replace Collector - Inspect interconnect and spring - Inspect ignitor glo-plug - replace if necessary - Measure H2/Air/Makeup Flows - Turn off H2 and measure FID Leakage Current - < 2pA - Ignite FID - monitor background and noise <20 pA and stable - Run customer sample or Agilent Checkout per 6890 Service Manual section 600.


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