Xylem SDI-12 RADAR - Manual (Page 36)

SDi-12 CommaND & reSPoNSe
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This command is used for installation or production testing and requires the use of a H-4191
Sidekick interface and a PC or an XL Series Data Logger. This command causes the radar to transmit
unsolicited real-time data for testing purposes. The test mode is used to help troubleshoot the
installation by providing a continuous readout of measurement data. This is not compliant with the
SDi-12 specification and cannot used with most data loggers. This command returns different data
based on the Power mode setting. To activate the test mode, send the command “aXTeST!”.
in Power mode = 0, The radar will enter the test mode and make continuous measurements. The test
mode is exited by sending a break or any new command on the SDi-12 bus. it may take a few tries
to exit if the command is sent at the same time data is being sent from the radar. removing power
from the radar also causes it to exit this mode.
in Power mode = 1, the radar will enter the test mode and take the raw data that would otherwise
be used for an “am1!” command and outputs it to the SDi-12 bus one piece at a time in order from
newest to oldest. after the data is sent it waits for 2 seconds and then starts over as if a new “aXTeST!”
Command were sent The test mode is exited by sending a break or any new command on the SDi-
12 bus. it may take a few tries to exit if the command is sent at the same time data is being sent from
the radar. removing power from the radar also causes it to exit this mode.
Format:
SensorAdr + Stage + Distance + Status
“XTeST” displays the following data:
0: +1.202 +3.222 +0
0: +1.212 +3.232 +0
0: +1.222 +3.342 +0
0: +1.232 +3.352 +0
0: +1.232 +3.352 +0
etc.
Extended “XTEST”