Linear Positioning
For the parallel orientation, the surface of the simulator was kept parallel to the surface of the transmission panel of the security system. (See Figure 62-8.) The distance from the surface of the security system transmission panel to the header of the pacemaker was set between 8.5 and 9.4 cm to keep the distance from the mid-point of the panel to the header of the pacemaker at about 11 cm, since the thickness of the panel of the security systems varied. Figure 62-6 shows the orientations and locations relative to the EAS panel. For the perpendicular orientation, the turntable holding the simulator was rotated 90 degrees perpendicular to the transmission panel. (See Figure 62-9.) The distance from the surface of the transmission panel to the header of the pacemaker was 12 cm. Both inhibition and reactivation tests were conducted at 5 cm intervals along the transmission panel, with the last interval varied because the width of each security system changed. Tests were repeated by rotating the turntable 90 degrees in the other direction perpendicular to the transmission panel. The distance from the surface of the transmission panel to the header of the pacemaker was changed to 23 cm. This was done to simulate a person with an implantable pacemaker at 12 cm and 23 cm from the transmission panel of the security system when the person walked through the system in opposite directions and touched the transmission panel while walking. The locus for the header of the pacemaker formed a parabolic curve with various distances from the transmission panel of the security system.
Rotation
Additional tests were carried out with the header of the pacemaker 122 cm from the ground, by rotating the torso simulator at 15-degree intervals until the simulator was perpendicular to the transmission panel. (Figure 62-9.) The simulator was kept at each position for 10 seconds. Inhibition and reactivation tests were performed for each position at three locations: at the middle and at both ends of the panel.
Hand-Held Metal Detectors
The HHMD was slowly swept up and down five times in front of the simulator to simulate a pacemaker patient being searched by security personnel. Three models of EAS systems from two manufacturers were tested. Six WTMDs from three manufacturers and 13 HHMDs from nine manufacturers were also tested