Chapter 5__________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 55
CHAPTER 5
OPERATION
This chapter contains information that is needed to operate this
product.
Getting Started
Vaisala Present Weather Detector PWD22 is a fully automatic
instrument for continuous weather measurement. Usually, PWD22 is
either set to send a data message automatically or it is polled by a host
computer. In addition, a set of user commands is provided for
configuring and monitoring the system performance. These commands
can be given in the command mode (see section Entering and Exiting
the Command Mode on page 56).
PWD22 has four different standard message formats for data message
output. It presents the weather type using the World Meteorological
Organization (WMO) code table 4680 (WaWa, in other words,
Present Weather reported from an automatic weather station). PWD22
report present weather also in WMO code table 4678 (METAR)
format. In addition, the United States National Weather Service
(NWS) abbreviations are available. The NWS list and WMO codes is
presented in Appendix C, NWS and WMO Code Tables, on page 117.
Operating Instructions
User intervention is not required in the normal operation of PWD22.
Operator commands are used only in the initial setup and during
routine maintenance. Several commands are also available for
troubleshooting.
