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

Equipment Description and General Construction Requirements 2.3 Room Structural Requirements
2.3.1 Floor Requirements
Discovery NM/CT 670 – Standard Integration Instructions
5483063-1EN, Rev.2, ©2015 GE Healthcare 2-41
2.3.1.5 Floor Vibration
Floor vibration requirements are included in the general vibration requirements
(see Vibration Specifications, p.2-44).
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,p.3-7).