Functional Checks
- Functional Checks
- System
  - Doing a compressor pressure check
    Do a check of the cryocooler compressor supply pressure.
  - Checking the RF screen room door
    Make sure the RF screen room door is functioning correctly.
  - B0 Drift Functional Check
  - Doing a check scan
    A check scan is done at the conclusion of many procedures. This functional check assures the unit is in good clinical working order.
  - Emergency Stop (E-Stop) planned maintenance
  - Emergency Off (E-Off) planned maintenance
  - fMRI QA Tool
  - HEC Hose Inspection, Coolant Fill, and Coolant Leak Check
  - Finalizing the HEC hose inspection, coolant fill, and coolant leak check
  - Identifying the Image Compute Node (ICN)
  - MDP power and ground and battery replacement label check
    MDP power and ground connections must be tight in order to avoid system failures.
  - Magnet Rundown Unit (MRU) Functional Check
  - Doing an MRU yearly service check (MRU, ERU, or EDU PM testing matrix)
    The model number is listed on the side of the MRU, ERU, or EDU. Refer to the appropriate vendor manual available from the online documentation library for applicable testing procedures.
  - Peripheral Pulse Probe Check
  - Spike Noise Check
  - System Level Correlated Noise Check
  - Checking the oxygen monitor
    References to various Oxygen Monitor Subsystem Manuals.
  - Checking and adjusting the patient intercom functionality
    GOC Audio Assembly (GOCAA) controls are adjusted at factory for best sound quality. This document describes how to check and confirm volume and quality of sound heard from speaker in the magnet bore and from speaker at the Scan Control and Intercom Module (SCIM). Directions for sound adjustments are also provided if needed.
  - Checking the gradient and system PDU power and ground connection
    PDU power and ground connections need to be tight in order to avoid system failures.
    - Applying LOTO - MDP
    - Tightening connections
    - Removing LOTO - MDP
    - Doing a check scan
      A check scan is done at the conclusion of many procedures. This functional check assures the unit is in good clinical working order.
- Radio Frequency (RF)
- Coils
- Magnet Enclosure
- Patient Table
- Patient/PAC
- Grounding and Leakage Current

Optima MR450w BASE 1.5T System Service Methods
5690012-2EN Revision 3
Object ID: 00000018WIA304A4510GYZ
Topic ID: id_2004634 Version: 4.0
Date: Feb 24, 2021 12:58:21 AM

Tightening connections

About this task

When tightening connections, make note of any that are very loose (for example, two full rotations or more on a single lug). Record this as part of the ePM documentation.

Procedure

Open left front door of the PGR cabinet to expose the front of the PDU.

Figure 1. Tighten Connections
Flip up the input power block lid to expose the connections as shown in the illustration below. Test the connections with a multimeter to make sure there is no AC voltage prior to continuing.
Tighten the incoming power and ground connections on the input power block of the PDU with a socket wrench with a 3/16 hex key extension.

Figure 2. Tighten Incoming Power and Ground
Remove the front PDU panel to expose connections to CB1.
Tighten the L1, L2, and L3 connections at CB1 inside the PDU.

Finalization

If any of the connections were very loose (for example, two full rotations or more on a single lug), record this as part of the ePM documentation.
Make sure all subsystems have powered up successfully.