SIGMA 150Ci - Manual (Page 26)

3.5
DAILY INSPECTION INSTRUCTIONS
Figure 3.4 Sealed source in the exposure mode
Sealed source
Source assembly
Shield
Exposure device
Locking
mechanism
Outlet port Source
guide tubes
Control cable
Remote
control crank
Exposure mode
When the source assembly reaches the exposure head at the radiographic working position,
the odometer will indicate (in feet and tenths of a foot) the approximate distance the sealed
source has traveled. (See figure 3.4)
To return the source assembly to the exposure device the crank handle is rotated in the
RETRACT direction (clockwise). When the source assembly is returned to the fully shielded
position within the exposure device, the locking mechanism automatically secures the source
assembly. The automatic securing mechanism will not permit exposure of the source
assembly unless the radiographer pushes the lock slide into the expose position.
The remote controls cannot be disconnected from the source assembly unless the source
assembly is fully retracted into the shielded position in the exposure device.
The system is designed for safe and reliable operation provided the system is properly used
and maintained.