USER'S GUIDE  ____________________________________________________________________ 
6  ____________________________________________________________________ M211187EN-C 
List of Figures 
Figure 1  FS11 System ........................................................................ 16 
Figure 2  FS11 Recommended Location with Mast 
FSAM250/FSFM250 .......................................................... 20 
Figure 3  FS11 Equipment Grounding ............................................ 24 
Figure 4  Junction Box ......................................................................... 26 
Figure 5  Casting Concrete Foundation ......................................... 28 
Figure 6  FS11 Foundation Construction ....................................... 30 
Figure 7  Mounting FS11 to Existing Surface ............................... 31 
Figure 8  Mounting FS11 Mast Using Foundation Kit 
FS211296 .............................................................................. 32 
Figure 9  Mounting FS11 Frangible Mast Grounding  
Cable ....................................................................................... 33 
Figure 10  Mounting FS11 Aluminum Mast Using  
Foundation Kit FS211296 ................................................. 34 
Figure 11  Fixing Sensor Arm with Allen Screws ........................... 35 
Figure 12  Mounting Rear Panel of Radiation Shield ................... 35 
Figure 13  Tilting Aluminum and Frangible Pole Masts ............... 36 
Figure 14  Connecting Measurement Unit ....................................... 37 
Figure 15  Suspending Enclosure from Rear Panel...................... 38 
Figure 16  Threading Cable Connector with Cable Tie ................ 38 
Figure 17  Threading LM21 Cable ...................................................... 39 
Figure 18  Mounting LM21 .................................................................... 39 
Figure 19  Mounting Interface Unit Enclosure ................................ 40 
Figure 20  Sensor Arm Assembly ....................................................... 41 
Figure 21  Mounting Radiation Shield ............................................... 42 
Figure 22  Backup Battery without Cover Plate.............................. 43 
Figure 23  Interface Unit Enclosure Cable ....................................... 44 
Figure 24  Cabling Principle ................................................................. 46 
Figure 25  Cable Grounding Instruction ............................................ 48 
Figure 26  RS-232 Communication Option ...................................... 50 
Figure 27  RS-485 Communication Option ...................................... 51 
Figure 28  RS-485 Application ............................................................. 51 
Figure 29  DXL421 Modem Wiring ..................................................... 52 
Figure 30  Installing DXL421 ................................................................ 54 
Figure 31  Location of External Maintenance Line  
Connectors ............................................................................ 56 
Figure 32  Wiring Day/Night Photo Switch ....................................... 58 
Figure 33  Obstruction Light Wiring ................................................... 59 
Figure 34  Switching On Unit ............................................................... 60 
Figure 35  FS11 Block Diagram ........................................................ 102 
Figure 36  FST102 Transmitter Block Diagram ............................ 104 
Figure 37  Window Contamination Measurement Principle 
inside Transmitter and Receiver FSM102 ................. 105 
Figure 38  FSR102 Receiver Block Diagram ................................ 106 
Figure 39  Location of Surface Temperature Probe .................... 122 
Figure 40  Installing Zero Plugs......................................................... 128