Vaisala PWD22 User Manual page 4

User's Guide _______________________________________________________________________
CHAPTER 4
INSTALLATION............................................................................................ 37
2_____________________________________________________________________ M210543EN-B
Temperature Sensor ........................................................... 24
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RAINCAP Signal Processing............................................. 24
Algorithm Description............................................................ 25
Visibility ............................................................................... 25
Detecting Precipitation ........................................................ 25
Precipitation Intensity .......................................................... 26
Precipitation Accumulation.................................................. 27
Present Weather ................................................................. 27
Precipitation Types......................................................... 27
Liquid Precipitation.................................................... 28
Frozen Precipitation .................................................. 29
Mixed Precipitation.................................................... 29
Precipitation Type Unknown ..................................... 29
Visibility Types ............................................................... 30
Fog Codes ................................................................ 30
Weather Classes............................................................ 31
Weather Code Selection ................................................ 31
Applications ............................................................................ 32
Internal Monitoring................................................................. 32
Built-in Tests........................................................................ 32
Memory Tests...................................................................... 33
Signal Monitoring................................................................. 34
Hardware Monitoring........................................................... 34
Monitoring Contamination ................................................... 34
Selecting Location ................................................................. 37
Grounding and Lightning Protection ................................... 39
Equipment Grounding ......................................................... 39
Internal Grounding of PWD22 ............................................. 39
Grounding the Remote Units and the Communication Cable39
Installation Procedure............................................................ 40
Unpacking Instructions ........................................................ 40
Unpacking Procedure..................................................... 40
Storage........................................................................... 40
Initial Settings ...................................................................... 41
Weather Parameters ...................................................... 42
Mounting.............................................................................. 43
Verification........................................................................... 45
Connections............................................................................ 45
Connecting Cables .............................................................. 45
Basic Wiring ................................................................... 46
Supplying Power to PWD22................................................ 48
Internal Heaters without PWL111 (default) .................... 48
Internal Heaters with PWL111 (optional) ....................... 48
Hood Heaters PWH111 ................................................. 49
Communication Options...................................................... 49
Serial Communication Settings...................................... 49
Serial Transmission RS-232 .......................................... 49
Serial Multipoint Transmission RS-485.......................... 50
Connection of the Maintenance Terminal ...................... 50
Relay Controls..................................................................... 50