Xylem H-312-22 - Manual (Page 33)

H-312
SDI-12 Command and Response Protocol 4-13
4.12 Extended “XTEST”
This command is used for installation or production testing and requires the use of a H-419
Sidekick interface and a PC. This command causes the H-312 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 pressure data. This is not compliant with the SDI-12 specification and is not
used with data loggers.
To activate the test mode, send the command “aXTEST!” from the PC. The H-312 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 H-312. Removing power from the H-312 also causes it to
exit this mode.
Format:
SensorAdr + Stage + Pressure + Temperature +RawPressure (counts) + RawTemperature (counts)
“XTEST” displays the following data:
0: +1.202 +3.222 +23.0 +12345 +67890
0: +1.212 +3.232 +23.0 +12345 +67890
0: +1.222 +3.342 +23.0 +12345 +67890
0: +1.232 +3.352 +23.0 +12345 +67890
0: +1.232 +3.352 +23.0 +12345 +67890
etc.