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VAISALA ________________________________________________________________________ 1
Table of Contents
CHAPTER 1
GENERAL INFORMATION ............................................................................ 9
About This Manual ................................................................... 9
Version Information ............................................................... 9
Related Manuals ................................................................... 9
Documentation Conventions ............................................... 10
Safety ....................................................................................... 11
ESD Protection .................................................................... 13
Recycling ................................................................................ 13
Regulatory Compliances ....................................................... 14
Trademarks ............................................................................. 14
License Agreement ................................................................ 14
Warranty .................................................................................. 14
CHAPTER 2
PRODUCT OVERVIEW ................................................................................ 15
Introduction to Vaisala Present Weather Detector
PWD22/52 ................................................................................ 15
Hardware Structure ................................................................ 16
PWD22/52 Output ................................................................... 17
Product Nomenclature ........................................................... 18
Spare Parts ............................................................................. 18
CHAPTER 3
FUNCTIONAL DESCRIPTION ..................................................................... 19
Optical Measurements ........................................................... 21
Optical Arrangement ........................................................... 21
Transmitter Unit PWT11 ...................................................... 21
Light Receiver ..................................................................... 22
Additional Measurements ..................................................... 23
Vaisala RAINCAP
®
Rain Sensor ......................................... 23
Temperature Sensor ........................................................... 24
Background Luminance Sensor PWL111 (optional) ........... 24
BLSC Command ............................................................ 25
Continuous Mode ...................................................... 25
Day/night Switch Mode ............................................. 25
Disabling PWL111 .................................................... 25
BLCAL Command .......................................................... 26
Internal Monitoring ................................................................. 27
Built-in Tests........................................................................ 27
Memory Tests...................................................................... 28
Signal Monitoring ................................................................ 28
Hardware Monitoring ........................................................... 28
Monitoring Contamination ................................................... 29
Data Message Formats .......................................................... 29