Planned Maintenance Schedule C

Check the Temperature and Humidity in the scan room; record these on the PM Report Form. (Use the temperature and humidity tool [Oregon Scientific BAR608HGA], or an equivalent tool.)

Perform the following tasks in the General Gantry Inspection.)

• Test Display Lights and E-stop Buttons

• Test Patient Tilt Sensors

As a monitoring system, the inspection is necessary to ensure accuracy and clarity of the AVIMOS. (For procedure, see RCK Planned Maintenance.

Verify there is no crack or damage on QA phantom.

1. Move the table to lowest position.

2. Move the gantry to zero degrees.

3. Power down the system (for procedures, see Section 2.1 of Equipment Service - Lockout-Tagout-PPE) and apply LOTO (for procedures, see Equipment Service - Lockout-Tagout-PPE).

   note: If your system has an Emergency OFF switch on the wall, use it rather than the A1 Off switch to verify that the Emergency Off switch is working properly.

4. If installed, confirm that the UPS power is disconnected when the Emergency Off device is pushed.

5. Remove side, top, front, and rear gantry covers. (For procedures see, Replacement → Gantry → Enclosure → Cover Procedures.)

Complete the General Console Cleaning and Inspection. (For procedures, see General Console Cleaning and Inspection.)

Inspect the Brush Block, Brushes, and Remove Slip Ring Brush Debris. (For procedures, see Inspect Brush Block and Brushes and Remove Slip Ring Debris.)

Complete a Gantry Filter Cleaning and Rotational Checks, including the following: (For procedures, see Gantry Filter Cleaning and Rotational Checks.)

• Clean DAS Detector Plenum Filter

• Clean Gantry Heater Filter

• Clean the top cover fans

• Clean Detector Face Plate

• Complete Rotating Path Components and Cables Inspection

Defaultly perform HV cable candle stick inspection in every PM A, 1 time a year, but it can be scheduled to PM C only if it did not be schedule/performed in PM A and B , then keep it in every PM C to meet “ once a year ”. If required，refer to section 7.5 in PM A service procedure to perform HV Cable Candle Stick Inspection.

1. Remove LOTO (for procedures, see Equipment Service - Lockout-Tagout-PPE) and power up the system (for procedures, see Section 2.2 of Equipment Service - Lockout-Tagout-PPE).

2. Start up the UPS, if present. (For procedures, see two Phase Partial UPS Installation Manual, located in Service Methods->Installation->Option.)

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

4. Check that all five (5) of the Plenum Fans are operating properly. Use a piece of paper to make sure the fans are pulling air INTO the plenum.

   note: A fan that is not running can still have the fan blades moving as air is pushed back out of the plenum though that fan port.

5. Check/Grease the gantry main bearing.

   • Check the number of gantry revolutions since the gantry bearing was last greased.

   • If the number of revolutions is 2,000,000 or more, grease the gantry main bearing. (For procedures, see Grease Main Bearing)

   • If the number of revolutions is less than 2,000,000, indicate on the PM Report Form that grease is not required at this time.

Complete a Tube Heat Exchanger inspection. (For procedures, see Clean Tube Heat Exchanger and Clean JEDI Inverter Fans.)

1. Turn OFF the Axial and HV switches at the gantry service switch panel.

2. Complete the following Gantry Verification procedures:

   • Meter Verification

3. Turn ON the Axial and HV switches at the gantry service switch panel.

4. Complete the HHS Scans. (For procedures, see HHS Scans.)

   note:

   When the system generates the HHS scan report file, attach the file to the PM Report Form as an alternative to entering the data in the HHS Scan Data form.

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. (For procedures see, Replacement → Gantry → Enclosure → Cover Procedures.)

3. 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.)

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

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

6. Power up the system (for procedures, see Section 2.2 of Equipment Service - Lockout-Tagout-PPE).

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

8. Install the gantry side covers. (For installation procedures, see Replacement → Gantry → Enclosure → Cover Procedures.)

Complete the System Scanning Test. (For procedures, see System Scanning Test.) While completing the test, do the following verifications (Step 1 and Step 2) and record them on the PM Report Form:

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

   • SCIM

   • 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.

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

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

2. Confirm Save System State completed successfully.

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

4. Complete all required PM paperwork.