USER'S GUIDE____________________________________________________________________
44 __________________________________________________________________ M210543EN-E
In multipoint communication, where several sensors share the same
communication line, PWD22/52 should be used in the polled mode and
individual sensors must have distinct identifiers.
The commands for changing the default settings are listed in Table 10
below. For details on the commands, refer to Chapter 5, Operation on
page 47.
Table 10 Commands for Changing Default Settings
Operation Command
Baud rate selection BAUD
Polled or automatic mode, message
type setting
AMES
Sensor ID configuration CONF
Weather Parameters
PWD22/52 has also several changeable parameters, which control the
operation of the present weather algorithm and precipitation
measurement. The parameter values set at the factory have been tested
and found appropriate. Thus, they usually do not need to be changed.
There may, however, be conditions where other parameter values give
better results.
The commands for displaying and changing the parameters are listed in
Table 11 below.
Table 11 Commands for Displaying and Changing Parameters
Operation Command
Parameter listing WPAR
Parameter setting WSET
Local practice may require changes, especially in the precipitation
intensity limits (moderate, heavy). See section WSET on page 59 for a
description of the WSET comm
and.
The precipitation intensity and amount measurement is not calibrated at
the factory. Higher accuracy can be achieved by adjusting a scaling
factor (RAIN INTENSITY SCALE) with the WSET command. The new
scaling factor can be calculated by comparing PWD22/52 against a
reference rain gauge. See section WSET on page 59 for a description of
the WSET comm
and, and for further instructions.
The low visibility alarm limits (3) are zero by default, in other words, no
alarms will be generated or relays activated. The alarm limits can be set
in the CONF command.
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