Vaisala WXT510 - Manual (Page 72)

User’s Guide ______________________________________________________________________
70 __________________________________________________________________ M210470EN-D
The response:
a13ccccccccmmmmmmvvvxxxxxxxx
Example:
0I!013VAISALA_WXT510103Y2630000
Start Measurement Command (aM)
This command asks the device to make a measurement. The measured
data are not sent automatically and should be requested with a separate
Send data command aD.
The host device is not allowed to send any commands to other devices
on the bus until the measurement is completed. When several devices
are connected to the same bus and simultaneous measurements from the
different devices are needed, Start concurrent measurement aC or Start
concurrent measurement with CRC aCC should be used, see the next
sections.
See Examples of aM, aC and aD Commands on page 75 .
where
a
= Device address
I = Send identification command
! = Command terminator
where
a
= Device address
13 = The SDI-12 version number, indicating SDI-12
version compatibility; for example, version 1.3 is
encoded as 13
cccccccc = 8-character vendor identification Vaisala_
mmmmmm = 6 characters specifying the sensor model number
vvv = 3 characters specifying the firmware version
xxxxxxxx = 8-character serial number
= Response terminator