Siemens LDS 6 Operating Instructions Manual page 21

Mount the enclosed alignment adapter at the transmitter side:
Figure 3-9
Mount the cross-hair at the transmitter adapter:
Figure 3-10
Sensor CD 6C Operating Instructions
Operating Instructions, 12/2007, A5E00912721-02
Removal of the sensor at the transmitter side
Cross hair mounted at the transmitter adapter
Installation Guidelines
3.3 Alignment
19