6PRODUCT OVERVIEW .................................................................. 74
6.1 SWS Series Visibility and Present Weather Sensors...................... 74
6.2 Sensor Features ....................................................................... 77
6.3 Present Weather Measurements.................................................78
6.4 Visibility Measurements .............................................................78
6.5 Precipitation Measurements....................................................... 80
6.6 Sensor Specifications ................................................................88
6.7 Sensor Characteristics...............................................................90
6.8 Digital Communication Interface ................................................ 93
6.9 Analogue Outputs..................................................................... 94
6.10 Relay Outputs ..........................................................................94
6.11 Sensor Remote Self-Test Capabilities..........................................95
6.12 SWS Sensors –External Dimensions...........................................96
7INDEX .......................................................................................... 97
LIST OF FIGURES
Figure 1-1 SWS-200 in Packing...............................................................2
Figure 1-2 Cable Glands.........................................................................4
Figure 1-3 Power and Signal Connections................................................4
Figure 1-4 Location of J7, RS232/422/485 select......................................6
Figure 1-5 Relay Connections. ................................................................7
Figure 1-6 ALS-2 Connecting System ......................................................9
Figure 1-7 SWS-050 and SWS-100 Orientation....................................... 27
Figure 1-8 SWS-200 and SWS-250 Orientation....................................... 27
Figure 1-9 U-Bolt Mounting Method ......................................................28
Figure 4-1 Hood Heater ....................................................................... 60
Figure 4-2 Transmitter Hood with White Card ........................................64
Figure 5-1 Assembly of Calibration Reference Plaque.............................. 68
Figure 6-1 SWS-050 and SWS-100 Capabilities ...................................... 74
Figure 6-2 SWS-200 and SWS-250 Capabilities ...................................... 75
Figure 6-3 Precipitation Recognition Matrix............................................87
Figure 6-4 External Dimensions of SWS Sensors ....................................96
LIST OF TABLES
Table 1 Pin connections for power supply................................................5
Table 2 Pin connections for operating in RS232 interface mode.................6
Table 3 Pin connections for operating in RS422/RS485 interface mode ......6
Table 4 Connections for 0-10V analogue output.......................................8
Table 5 Connections for 0/4-20mA analogue output .................................8
Table 6 Options word (lower byte)........................................................12
Table 7 Relay configuration..................................................................21
Table 8 Sensor height above ground.....................................................26
Table 9 Remote self-test and monitoring check fields ............................. 31
