Chapter 1  ________________________________________________________ General Information 
 
VAISALA ________________________________________________________________________ 9 
CHAPTER 1 
GENERAL INFORMATION 
This chapter provides general notes for the product. 
About This Manual 
This manual provides information for installing, operating, and 
maintaining Vaisala Present Weather Detector PWD22/52. 
Version Information 
Table 1  Manual Revisions 
September 2015. This manual. Added information on the 
two heating options. Added Appendix D describing how to 
calibrate the TS sensor. Added cleaning and painting 
Related Manuals 
Table 2  Related Manuals 
Vaisala Present Weather Detector PWD12, User's Guide 
Vaisala Visibility Sensor PWD10/20/50, User's Guide