Vaisala WMT52 Manuel d'utilisateur télécharger pdf (Page 74)

User’s Guide ______________________________________________________________________

72 ___________________________________________________________________M210925EN-B

8, Sensor and Data Message Settings, on page 95. The data is outputted

when requested. In this mode all the commands presented in this

chapter are available.

For changing the message parameters, units and other settings, see

Chapter 8, Sensor and Data Message Settings, on page 95.

In the Native SDI-12 mode (aXU,M=S) the WMT52 is in idle state

most of the time (power consumption < 1 mW). More power is

consumed only during the measurements and data transmit requested by

the host device. Especially, the wind measurement typically consumes

60 mW average power (with 4 Hz sampling rate), throughout the

averaging period. In the Continuous mode (aXU,M=R) the power

consumption is determined by the internal update intervals of the sensor

and wind averaging time. These have certain limits so very long

measurement intervals cannot be achieved in this mode. Also the power

consumption between the measurements is about three times that of the

Native mode.

Address Query Command (?)

This command is used to query the address of the device on the bus.

If more than one sensor is connected to the bus, they will all respond,

causing a bus collision.

Command format: ?!

The response:

a<cr><lf>

Example (device address 0):

where

? = Address query command

! = Command terminator

where

a = Device address (default = 0)

<cr><lf> = Response terminator

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Vaisala WMT52 Manuel d'utilisateur Page 74