Thermo Scientific DSP2 - Metal Free Area

9
Metal Free Area
While the detector is shielded above, below and on the sides, metal objects have to be kept from the entrance and exit of the
detector opening as shown below. No metal can be located in this area. Large moving metal should be kept fifty (50) percent
further away or at least two (2) times the smaller aperture dimension. (see Figure 8). There are special models available for
operation in areas which require smaller metal free areas. Contact Goring Kerr for more details.
Aperture Width
A
1.5 * B
1.5 * B
C
Aperture
Height
B
Figure 8
Aperture Clearance
It is important that nothing is allowed to touch any part of the detector's aperture. A slider bed or board is required to support
the load of the product on the belt. This can be any non-metallic material; phenolic is recommended as it is easy to machine,
does not generate static and has good wearing properties. The slider board must be supported outside the search head and
should not rest on any part of the detector. One suggested way of installation is illustrated below. (see Figure 9)
Conveyor BeltSlider board
support
Slider Board
Clearance
Figure 9