User`s guide

Chapter 5 _______________________________________ Serial Communication and Analog Output
VAISALA _______________________________________________________________________ 65
1002-050
Figure 29 Timing for RS-232, RS-485, and RS-422 Interfaces
The response delay t2 is user-configurable. In configuration mode
some commands have a longer response delay.
- SDI-12 interface: The timing is compliant with the SDI-12 standard.
For the complete SDI-12 standard text, see the SDI-12 website
http://www.sdi-12.org.
Analog Output
Analog outputs are either enabled or disabled and the output settings are
preconfigured at the factory according to the customer order. In analog
output operation WMT700 takes measurements according to the
configured averaging time and synthesizes the analog outputs of wind
speed and wind direction with an update interval of 0.25 seconds.
You can change the analog output type and scaling of WMT700
according to your needs. You may also need to disable the analog output
functionality to save power. For instructions, see Configuration
Parameters on page 81
WMT700 provides the following analog outputs:
- AOUT1 for wind speed data
- AOUT2 for wind direction data
NOTE
To emulate the WS425 analog output, choose voltage output, frequency
output, and potentiometer. For more detailed instructions, see Upgrading
from Vaisala WINDCAP
®
Ultrasonic Wind Sensor WS425 to WMT700
Technical Reference.
For information on wiring, see section Wiring on page 52.