• Topic ID: id_16157643
  • Version: 4.0
  • Date: May 24, 2022 2:04:36 AM

Planned Maintenance Schedule W

1 Schedule W Overview

This P.M. is applied to system within warranty period (one year after installation). The recommended timing is 7 ~ 9 months after installation or 1.3 million gantry revolutions, whichever comes first.

This schedule includes a general cleaning and inspection of the Gantry, Console and Table. In addition, you will inspect any Options installed at the customer site. The tools, test equipment, and consumables listed here are needed to complete Schedule W

Every site must maintain a site log. It can be a GE Site Log, or a notebook or binder that you create. A System Service History also is available through iCenter or ISD tools.

During the course of the PM, if you find anything that you determine is critical to quality or to the operation of the system, then you should record it on the PM Report Form, and schedule additional time for specific corrective action.

You will need to open the PM Report e-form that corresponds to this PM Schedule. (The e-form is located on SIMS Content Viewer) Fill in the Report form as you complete the PM Schedule. Print one copy for your Site Log. You may need to print a second copy for the customer, if requested.

2 Personnel and Time Requirements

3 Tools and Test Equipment

4 Consumables

5 Preliminary Requirements

You may do any of the following remotely, if possible.

7 Option Inspection

If your site has any of the following options, complete an inspection. (For procedure, see Option Inspection)
  • Nemote Injector
  • RCK-AVIMOS

8 Emergency Off Switch (On wall)

If your system has an Emergency OFF switch on the wall, verify that the Emergency Off switch is working properly.

10 Slip ring & Brush Block Inspection and Maintenance

15 General Table Cleaning & Inspection

15.1 Inspect/Clean Table Pan

  1. Move the table to ISO elevation and the cradle to the maximum OUT position.

  2. Turn the power OFF (120 VAC, Axial Drive and HVDC) at the gantry service switch panel.

  3. Complete 1 Preliminary Tasks in General Table PM.

15.2 Inspect Table Covers

Complete 10 Inspect Table Covers in General Table PM.

15.3 Inspect Cradle Accessory Attachment (Note in Comments if anything is replaced)

Complete 11 Cradle Accessory Attachment Inspection in General Table PM.

15.4 Check Tape Switches

  1. Restore the power OFF (120 VAC, Axial Drive and HVDC) at the gantry service switch panel.

  2. Complete 12 Tape Switches Inspection in General Table PM.

16 Quality Assurance Test

16.1 Scan Window Inspection/Replacement

  1. Turn the 120 VAC, HV and Axial power OFF at the gantry service switch panel. (For procedures, see Safety-Equipment Service-Gantry)

  2. Reinstall front, rear, and top covers to the gantry.

  3. Turn the 120 VAC power ON at the gantry service switch panel. (For procedures, see Safety-Equipment Service-Gantry.)

  4. Rotate the gantry by hand and inspect rotational clearances.

  5. Install and inspect the Scan Window. (For installation procedures, see Replacement-Gantry Enclosure-Gantry Scan Window Removal and Re-install.)

    1. Inspect the scan window for physical damage.

    2. Check that the scan window is not raised higher than the front or rear cover at any location on the circle, and that the window is not wrinkled (see Figure 1).

      Figure 1. Scan Window

    3. Replace the scan window if it is damaged. (If you need to replace the scan window, follow the procedures in Replacement-Gantry Enclosure-Gantry Scan Window Removal and Re-install to remove the old window and install a new one.)

  6. Turn on the Axial Enable and HVDC switches at the gantry service switch panel. (For procedures, see Safety-Equipment Service-Gantry)

  7. Install the gantry side covers.

16.2 QA Phantom Inspection

Verify there is no crack and no damage on QA phantom.

16.3 Quality Assurance Test

Complete the Quality Assurance Test. (For procedures, see Quality Assurance Test)

16.4 X-ray on indicators

Complete the System Scanning Test. (For procedures, see System Scanning Test.) While completing the test, do the following verifications.

  1. Verify that the following X-ray On indicators light up:

    • SCIM/GSCB

    • Gantry Front

    • Gantry Rear (To avoid walking into the room during a scan, you may want to use a mirror to check this X-ray indicator.)

    • Room Warning Light

  2. Verify that the following scan control push-button are operational:

    • Start scan (and keypad lights).

    • Stop scan (and keypad lights).

    • Pause scan.

    • Advance to scan.

    • Stop table.

17 Finishing Up

17.1 Confirm Save State Completed

  1. Start Save System State (For procedures, see Section 4.1 in System State Save Restore.)

  2. Confirm Save System State completed successfully.

17.2 PM Paper work completed for this site

  1. Update the site logs. (For procedures, see Update Site Logs.)

  2. Complete all required PM paperwork.