• Topic ID: id_12374945
  • Version: 1.5
  • Date: Jul 5, 2019 6:08:29 PM

eSRPS Filter Replacement

Prerequisites

Table 1 Personnel requirements
Required persons Preliminary requirements Procedure Finalization
2 - 30 minutes 10 minutes
Table 2 Tools and test equipment
Item Quantity Effectivity Part number Manufacturer
Phillips Screwdriver 1 - - -
Table 3 Replacement parts
Item Quantity Effectivity Part number Manufacturer
eSRPS Filter 1 -

See FRU list.

 -
Table 4 Safety
  • danger
  • strong magnetic field!
  • Ferrous materials can become dangerous projectiles in the presence of the magnetic field produced by the magnet.
  • do not bring any ferromagnetic tools or equipment into the magnet room.
  • danger
  • Electrocution hazard
  • high voltage present
  • Dangerous voltages exist inside the PEN Cabinet when energized.
  • warning
  • Personal injury and equipment damage
  • If the magnet is energized, tools and loose materials that contain ferrous material will be strongly attracted to the magnet and may become dangerous projectiles.
  • When servicing any magnetic equipment, it is critically important that the service engineer consciously plan the path to be taken when moving highly ferrous devices within the magnet environment. The path should be as far from the magnet as practical and avoid high flux-density fields.
    • Movement of ferrous material in the magnet room must follow the GE service procedure for that device.
    • When exiting, move away from the magnet in the most direct manner possible. Except when moving ferrous material to and from its native location on or near the magnet, the static magnetic field in any portion of the service path shall not exceed 200 Gauss.
    • Two (2) MR safety trained personnel must be present at all times when servicing highly ferrous devices in the areas of magnetic fields.
    • When planning a service path, it is critical that the path be clear and sufficiently wide. Make sure that there are no trip hazards, obstacles, clutter, slippery surfaces, or other items even partially restricting the path. If there are portable obstacles in a path, remove them from the area and replace them after the service action is completed. It is required to walk the path prior to beginning service to ensure that there is sufficient space through which to pass for yourself and the object being serviced.
  • warning
  • POSSIBLE PERSONAL INJURY!
  • THIS PROCEDURE REQUIRES Movement OF highly FERROUS MATERIAL IN CLOSE PROXIMITY TO THE MAGNET. ANY FIELD STRENGTH >200 GAUSS WILL FORCIBLY ATTRACT THE BLOWER BOX and THE MOTOR PANEL ASSEMBLY.
  • STAY OUTSIDE THE 200 GAUSS LINE WHEN MOVING either component. KEEP AS FAR FROM MAGNET AS POSSIBLE AND REFER TO the MR Magnet Safety Requirements in the MR Service Safety Manual, PN 5452735.

Remove eSRPS Filter

Procedure

  1. Perform LOTO for the RF amplifier and PEN cabinet (magnet room electronics). See the MR Service Safety Manual, PN 5452735.
  2. Disconnect cables from front of eSRPS filter (inside the scan room).
  3. Remove 6 thumbscrews.

    Figure 1. Front of eSRPS Filter

  4. Disconnect cables from rear of eSRPS filter (equipment room side).
    • danger
    • Strong Magnetic Field!
    • The Filter is a Large Ferrous object and can become dangerous projectile in the presence of the magnetic field produced by the magnet.
    • Plan a clear, wide service path to remove the filter from the scan room. Verify that there are no trip hazards, obstacles, clutter, slippery surfaces, or other items intruding into the service path. If any items are in the service path, remove them before removing the filter.
  5. Slide out the filter and safely remove it from the scan room.

Replace eSRPS Filter

Procedure

  1. Reconnect the cables to the rear of the filter (equipment room side).
  2. Slide in the new filter.
  3. Secure 6 thumbscrews.
  4. Reconnect the cables to the front of the filter.

Finalization

Procedure

  1. Remove LOTO for the RF amplifier and PEN cabinet (magnet room electronics). See the MR Service Safety Manual, PN 5452735.
  2. Run a Check Scan.