Preventive Maintenance Course

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Preventive MaintenanceCourse
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Course Overview

• Consumables Accessories
• Basic Plasmagram Theory
• Maintenance Log On
• Menu
• Calibration
• Preventive Maintenance

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Consumables Accessories

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

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Basic Plasmagram Theory
Detector Schematic
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Maintenance Log On

• Log on
• Enter Maintenance PIN
• Select ltMenugt

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Menu
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Menu Screen

• All maintenance procedures start at the Menu
  Screen.

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File Functions
Menus
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Edit Functions Options
Menu Screen
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Edit Functions Users
Menu Screen
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View Functions Config/Notes
Menu Screen
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View Functions Status
Menu Screen

• The Status window displays flow, temperature,
  Power and Dryer information.

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Action Functions Burn in Membrane
Menu Screen

• Increases Desorber and Detector temperatures to
  accelerate cleaning of the membrane.

The default burn-in time is four hours.
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Action Functions Live Mode
Menu Screen
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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.

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Auto-Calibration
Calibration

• Auto-Calibration is the primary calibration
  method.
• The procedure is shown here, but is usually
  performed by the operator.

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Manual Calibration (Dual Peak)
Calibration
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Manual Calibration (Dual Peak)
Calibration

1. Select Neg-CAL-1 and ltOKgt.

1. Insert the calibration trap.
2. Remove and discard the trap when directed.
3. Select high peak in or near the white band.
4. Select ltOKgt.

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Manual Calibration (Dual Peak)
Calibration

1. Select Pos-CAL-1 and ltOKgt.

1. Select high peak in white band.
2. Select ltOKgt.

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Manual Calibration (Dual Peak)
Calibration

1. Press ltYesgt to accept the calibration
2. Press ltOKgt.

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Manual Calibration (Dual Peak)
Calibration

1. Press ltCleargt.

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Preventive Maintenance
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Why Maintenance is Necessary
Preventive Maintenance

• Optimize system performance
• Keeps the sample and detector tubing clear of
  contamination
• Prevents nuisance alarms
• Minimize down time
• Reduce repair costs

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Weekly Maintenance Checklist
Preventive Maintenance

• Power down the system.
• Wear GE provided white cotton gloves while doing
  maintenance.

1. Check/Clean the fan filter
2. Check dopant levels
3. Remove Desorber, Locking Ring and Nozzle
4. Remove Stainless Filter
5. Blow out Sample Air Line
6. Reinstall/Replace Stainless Filter
7. Clean/Inspect membrane
8. Clean/Reinstall Nozzle and Locking Ring
9. Turn Unit On (Allow temperature to stabilize)
10. Check Sample Flow (180 to 220 cc/min)
11. Check Detector Flow (180 to 220 cc/min)
12. Check Nozzle Flow (approx. 0.2 to 0.4 SCFH)
13. Clean and Re-install Desorber

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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.
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Weekly Maintenance Check Dopant Levels
Preventive Maintenance
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.
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Weekly Maintenance Remove Desorber, Locking Ring
Nozzle
Preventive Maintenance
3.a. Remove Desorber and let cool 3.b. Unscrew
locking ring 3.c. Remove nozzle
Caution Desorber is hot
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Weekly Maintenance Remove Sample Filter
Weekly Maintenance
4.a. While the Desorber is out, unscrew the
filter cover.
4.b. Remove filter with wooden tool.
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Weekly Maintenance Blow Out Sample Line
Preventive Maintenance
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)
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Weekly Maintenance Reinstall/Replace Sample
Filter
Weekly Maintenance
6.c. Reinstall the filter cover.
6.a. Check the filter. Replace if
discolored. 6.b. Reinstall filter.
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Weekly Maintenance Clean / Inspect Membrane
Preventive Maintenance
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.
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Weekly Maintenance Clean and Reinstall Nozzle
Locking Ring
Preventive Maintenance
8.a. Reinstall Nozzle. 8.b. Reinstall locking
ring.
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Weekly Maintenance Power Up Itemiser3.
Preventive Maintenance
9. Power up the Itemiser3 and allow it to warm
up until the temperatures stabilize.
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Weekly Maintenance Check Sample Detector Air
Flow
Preventive Maintenance
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.
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Weekly Maintenance Check Sample Detector Air
Flow
Preventive Maintenance
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.
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Weekly Maintenance Verify Nozzle Flow
Preventive Maintenance
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
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Weekly Maintenance Cleaning Desorber
Preventive Maintenance
13. Clean and reinstall the Desorber
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Monthly Maintenance Changing the Membrane
Preventive Maintenance
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!

1. 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.
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Monthly Maintenance Changing the Membrane
Preventive Maintenance

1. Install new membrane as shown. Carefully inspect
   membrane to ensure no tears occurred during
   installation.

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Monthly Maintenance Verify Nozzle Flow
Preventive Maintenance

1. Power up the Itemiser3 (warm up for 10 minutes),
   and make sure the gauge reads approx. 0.2 to 0.4
   SCFH

1. With Desorber removed, attach the plastic hose
   from the flow gauge to the nozzle.

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Monthly Maintenance Membrane Burn in
Preventive Maintenance

1. Re-install Desorber, Select Menu then Burn in
   Membrane. Saying Yes results in a four hour
   period of raised temperature.

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Annual Maintenance Radiation Wipe Testing
Preventive Maintenance
Radiation Wipe Test Locations Remove Desorber
and wipe around the nozzle area. Wipe along
seams of the instrument, particularly near the
nozzle
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Summary

• Consumables Accessories
• Basic Plasmagram Theory
• Maintenance Log On
• Menu
• Calibration
• Preventive Maintenance