2.4  Operators Controls and Indicators 
2.4.1  Scanner user panel and radiation warning indicators 
Two scanner user panels are provided, one located at each end of the beam (see Figure 
51). 
 
Fig. 51.   Scanner User Panel 
The primary functions of the panel are: 
•  indicate the status of radiation sensor shutters 
•  allow sensors to be activated, disabled, or locked out 
•  provide means to control the scanner motion 
•  enable splitting of heads 
Button functions are depicted with rectangular outlined icons. Warning symbols and 
indicator lights cannot be pressed. 
2.5.1.1  Panel Layout 
The scanner user panel is divided into three upper rows of sensor controls, and a lower row 
for scanner motion and head split control. 
The first three rows of sensor controls are organized by hazard type, indicated by the 
leftmost triangle icon. Only sensors which have an associated health or sheet hazard are 
controlled by the scanner user panel and include those shown in the following table.