Xylem H-3521 - Manual (Page 49)

H-3521
SDI-12 Command and Response Protocol 5-19
5.17 Extended “XTEST”
This command is used for installation or production testing and requires the use of a H-4191
Sidekick interface and a PC. This command causes the H-3521 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-3521 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-3521. Removing power from the H-3521 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.
5.18 Extended “XDEF”
This command is used to set all the user settings back to factory defaults. This is useful in
troubleshooting when nothings seems to be working.
5.19 Extended “XCFG”
This command is used for installation or production testing and requires the use of a H-4191
Sidekick interface and a PC. This command returns the current configuration of the H-3521.
“XCFG” displays the following data:
H-3521 Fluid Configuration
013 DAAH-3521001S#000000V100
Power Mode = +0
NOAA Mode = Off
Mean Count = +8.
User Slope = +2.306700
User Offset = +0.000000
Max PSI = +20.0
4-20mA Slope = +.462427