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Preventive Maintenance Course

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  1. Preventive MaintenanceCourse PN: TM001017 rev:3

  2. Course Overview • Consumables & Accessories • Basic Plasmagram Theory • Maintenance Log On • Menu • Calibration • Preventive Maintenance PN: TM001017 rev:3

  3. 11. 2. 10. 1. 13. 9. 3. 12. 4. 5. 6. 7. 8. Consumables & Accessories • Dopant Tubes • AC & DC Power Cords • Hand Wand Sampler • Calibration and Multipurpose Sample Traps • Soft Shipping Case with User’s Manual & Maintenance Log Book • Gloves • Spare Membranes & Spare Parts Kit • Printer Paper • Wooden Membrane Tool • Fan Filters & Fan Guard • Swabs • Canned Air • Wipes PN: TM001017 rev:3

  4. Basic Plasmagram Theory Detector Schematic PN: TM001017 rev:3

  5. Maintenance Log On • Log on: • Enter Maintenance PIN: • Select <Menu> PN: TM001017 rev:3

  6. Menu PN: TM001017 rev:3

  7. Menu Screen All maintenance procedures start at the Menu Screen. PN: TM001017 rev:3

  8. Menus File Functions PN: TM001017 rev:3

  9. Menu Screen Edit Functions: Options PN: TM001017 rev:3

  10. Menu Screen Edit Functions: Users PN: TM001017 rev:3

  11. Menu Screen View Functions: Config/Notes PN: TM001017 rev:3

  12. Menu Screen View Functions: Status The Status window displays flow, temperature, Power and Dryer information. PN: TM001017 rev:3

  13. Menu Screen Action Functions: Burn in Membrane • Increases Desorber and Detector temperatures to accelerate cleaning of the membrane. The default burn-in time is four hours. PN: TM001017 rev:3

  14. Menu Screen Action Functions: Live Mode PN: TM001017 rev:3

  15. Calibration Reasons for Calibration Why Calibrate? • Provides a known substance to be used as a reference to identify contraband. • Compensates for changes in atmospheric pressure and humidity. • Verifies proper system operation. • Auto-Calibration is the preferred method of calibration. • If Auto-Calibration fails, and there are no other warnings, then it will be necessary to perform a manual calibration and then reset the calibration defaults. • Dual Peak is the preferred method for Manual Calibration. PN: TM001017 rev:3

  16. Calibration Auto-Calibration • Auto-Calibration is the primary calibration method. • The procedure is shown here, but is usually performed by the operator. PN: TM001017 rev:3

  17. Calibration Manual Calibration (Dual Peak) PN: TM001017 rev:3

  18. 4. Calibration Manual Calibration (Dual Peak) • Select Neg-CAL-1 and <OK>. • Insert the calibration trap. • Remove and discard the trap when directed. • Select high peak in or near the white band. • Select <OK>. PN: TM001017 rev:3

  19. 7. Calibration Manual Calibration (Dual Peak) • Select Pos-CAL-1 and <OK>. • Select high peak in white band. • Select <OK>. PN: TM001017 rev:3

  20. Calibration Manual Calibration (Dual Peak) • Press <Yes> to accept the calibration • Press <OK>. PN: TM001017 rev:3

  21. Calibration Manual Calibration (Dual Peak) • Press <Clear>. PN: TM001017 rev:3

  22. Preventive Maintenance PN: TM001017 rev:3

  23. Preventive Maintenance Why Maintenance is Necessary • Optimize system performance • Keeps the sample and detector tubing clear of contamination • Prevents nuisance alarms • Minimize down time • Reduce repair costs PN: TM001017 rev:3

  24. Preventive Maintenance Weekly Maintenance: Checklist • Power down the system. • Wear GE provided white cotton gloves while doing maintenance. • Check/Clean the fan filter • Check dopant levels • Remove Desorber, Locking Ring and Nozzle • Remove Stainless Filter • Blow out Sample Air Line • Reinstall/Replace Stainless Filter • Clean/Inspect membrane • Clean/Reinstall Nozzle and Locking Ring • Turn Unit On (Allow temperature to stabilize) • Check Sample Flow (180 to 220 cc/min) • Check Detector Flow (180 to 220 cc/min) • Check Nozzle Flow (approx. 0.2 to 0.4 SCFH) • Clean and Re-install Desorber PN: TM001017 rev:3

  25. Weekly Maintenance: Check/Clean Fan Filter Preventive Maintenance 1.a. Remove the plastic filter cover (snaps on and off). 1.b. Clean the fan filter with canned air. 1.c. Replace if damaged. PN: TM001017 rev:3

  26. Preventive Maintenance Weekly Maintenance: Check Dopant Levels 2.b. The large tube is the Dichloromethane (negative ion) Dopant, and the three small tubes are Ammonia (positive ion) Dopants. Replace any tubes that are empty. 2.a. Carefully pull with a twisting motion. PN: TM001017 rev:3

  27. Preventive Maintenance Weekly Maintenance: Remove Desorber, Locking Ring & Nozzle 3.a. Remove Desorber and let cool 3.b. Unscrew locking ring 3.c. Remove nozzle Caution: Desorber is hot PN: TM001017 rev:3

  28. Weekly Maintenance Weekly Maintenance: Remove Sample Filter 4.a. While the Desorber is out, unscrew the filter cover. 4.b. Remove filter with wooden tool. PN: TM001017 rev:3

  29. Preventive Maintenance Weekly Maintenance: Blow Out Sample Line 5.a. With nozzle removed, blow air through the air line entrance to the right of the membrane. 5.b. Blast the air for 8 to 10 seconds. (hold can upright) PN: TM001017 rev:3

  30. Weekly Maintenance Weekly Maintenance: Reinstall/Replace Sample Filter 6.c. Reinstall the filter cover. 6.a. Check the filter. Replace if discolored. 6.b. Reinstall filter. PN: TM001017 rev:3

  31. Preventive Maintenance Weekly Maintenance: Clean / Inspect Membrane 7.a. Gently clean the membrane with the side of an alcohol swab. 7.b. Inspect the membrane for damage. Replace if necessary.[see monthly maintenance for replacement procedure.] PN: TM001017 rev:3

  32. Preventive Maintenance Weekly Maintenance: Clean and Reinstall Nozzle & Locking Ring 8.a. Reinstall Nozzle. 8.b. Reinstall locking ring. PN: TM001017 rev:3

  33. Preventive Maintenance Weekly Maintenance: Power Up Itemiser3. 9. Power up the Itemiser3 and allow it to warm up until the temperatures stabilize. PN: TM001017 rev:3

  34. Preventive Maintenance Weekly Maintenance: Check Sample & Detector Air Flow Flow Adjustment Screw Sample Air Flow Meter 10.a. Check Sample flow. Should be between 180 and 220 cc/min. Only if adjustment is needed: 10.b. Loosen locking nut on adjusting screw. 10.c. Turn Screw small amounts [no more than a quarter turn] to adjust flow. Allow time for flow to settle before readjusting. Adjust to between 180 to 220 cc/min. 10.d. Tighten locking nut. PN: TM001017 rev:3

  35. Preventive Maintenance Weekly Maintenance: Check Sample & Detector Air Flow Flow Adjustment Screw Detector Air Flow Meter 11.a. Check Detector flow. It should be between 180 and 220 cc/min. Only if adjustment is needed: 11.b. Loosen locking nut on adjusting screw. 11.c. Turn Screw small amounts [no more than a quarter turn] to adjust flow. Allow time for flow to settle before readjusting. Adjust to between 180 to 220 cc/min. 11.d. Tighten locking nut. PN: TM001017 rev:3

  36. Preventive Maintenance Weekly Maintenance: Verify Nozzle Flow 12.a. With Desorber removed, attach the plastic hose from the flow gauge to the nozzle. 12.b. Make sure the gauge reads 0.2 to 0.4 SCFH PN: TM001017 rev:3

  37. Preventive Maintenance Weekly Maintenance: Cleaning Desorber 13. Clean and reinstall the Desorber PN: TM001017 rev:3

  38. Preventive Maintenance Monthly Maintenance: Changing the Membrane Monthly maintenance is the same as weekly except that the membrane is changed instead of cleaned. Wear gloves for this procedure, and do not use metal tools on membrane! • The Wooden Membrane Tool helps when removing membrane, and pieces of membrane that stick. Caution: When removing the old membrane from the Interface housing, you must only use the wooden membrane tool. Use of a metal instrument will damage the surface of the Interface. PN: TM001017 rev:3

  39. Preventive Maintenance Monthly Maintenance: Changing the Membrane • Install new membrane as shown. Carefully inspect membrane to ensure no tears occurred during installation. PN: TM001017 rev:3

  40. Preventive Maintenance Monthly Maintenance: Verify Nozzle Flow • With Desorber removed, attach the plastic hose from the flow gauge to the nozzle. • Power up the Itemiser3 (warm up for 10 minutes), and make sure the gauge reads approx. 0.2 to 0.4 SCFH PN: TM001017 rev:3

  41. Preventive Maintenance Monthly Maintenance: Membrane Burn in • Re-install Desorber, Select Menu then Burn in Membrane. Saying “Yes” results in a four hour period of raised temperature. PN: TM001017 rev:3

  42. Preventive Maintenance Annual Maintenance: Radiation Wipe Testing Radiation Wipe Test Locations Remove Desorber and wipe around the nozzle area. Wipe along seams of the instrument, particularly near the nozzle PN: TM001017 rev:3

  43. Summary • Consumables & Accessories • Basic Plasmagram Theory • Maintenance Log On • Menu • Calibration • Preventive Maintenance PN: TM001017 rev:3