e. Anchors must be non-magnetic
f. Anchors must not induce galvanic corrosion with the RF shield
g.
Anchors must be commercially procured
h.
The anchor rod hole clearance in the dock frame anchor base is 0.43 in. (11). The
anchor rod diameter must be sized appropriately
i.
Anchors must meet the following clamping force: 600 lbs (2,669 N)
j. The anchor rod must extend 2.25 in. ±0.5 in (60 mm ±13 mm) above the finished floor
k.
The anchor rod must be less than 6 in (152 mm) in total length (length above the floor
plus embedded length)
l. If underside of deck is metallic, then insulating bushing must be added to through bolt
hardware to prevent grounding of shield at this point.
7. The RF shield vendor must perform a pull test on the anchor (equal to the clamping force).
Results must be provided to the GE Healthcare Project Manager of Installation (PMI)
8. The RF shield vendor must provide instructions for removal / replacement of the table
anchor without using a torque wrench. Instructions must be given to the GE Healthcare
Project Manager of Installation (PMI).
5.4.4 RF Shielding Integrity Reliability Requirements
1. Ensure all joints and mechanical connections remain secure:
a. All solder joints clean and properly prepared
b.
All mechanical fasteners sufficiently tightened and secured
c.
Do not use rivets or self-tapping screws (as these tend to loosen over time due to
vibration)
2. Prevent RF shield corrosion:
a.
Avoid contact between dissimilar metals
b.
Ensure all joints and seams are properly dressed using proper materials
NOTE:
Sacrificial anodes are recommended
3. Doors and door frames must be structurally stiff to prevent physical changes to the RF
shield
SIGNA Voyager Pre-Installation
Direction 5680008–1EN, Revision 2
Chapter 3 Magnet Room 71
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