Floor Vibration; Floor Conductivity Recommendations; Additional Floor Requirements - GE Discovery NM/CT 670 Instructions Manual

Equipment Description and General Construction Requirements

2.3.1.5 Floor Vibration

Floor vibration requirements are included in the general vibration requirements
(see Vibration Specifications,

2.3.1.6 Floor Conductivity Recommendations

The purpose of this section is to measure the electrical conductivity of the floor surface to the
"GND" (Ground).
The surface of the conductive floor shall provide a patch of electrical conductivity between all

persons and equipment making contact with the floor.
Using a DVM, measure the impedance between the upper surface of the floor – where the

NM gantry is planned to be positioned, and the system power supply GND terminal in the
room. The readout needs to be <35 M Ohm.
Repeat the measurement in the area where the patient table will be positioned. The readout

needs to be < 35 M Ohm.
Repeat the measurement in the area where CT gantry will be positioned. The readout needs

to be < 35 M Ohm.

2.3.1.7 Additional Floor Requirements

The floor finish must take into consideration magnetic field and EMI considerations
(see Special Construction Requirements, p.3-1 andEMI Considerations,
Discovery NM/CT 670 – Standard Integration Instructions
5483063-1EN, Rev.2, ©2015 GE Healthcare
p.2-44).
2-41
2.3 Room Structural Requirements
2.3.1 Floor Requirements
p.3-7).