Xylem H-4280 - Manual (Page 31)

H-4280
SDI-12 Command and Response Protocol 3-19
3.15 Extended “XTEST”
The “XTEST” 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-4280 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 is not used with data loggers.
To activate the test mode, send the command “aXTEST!” from the PC. The H-4280 will enter
the test mode and make and print 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-4280. Removing power from the H-4280 also
causes it to exit this mode.
Example XTEST display:
0: +1.202 +3.222 +1.234 +2.345 +2.677 +3.333 +1.202 +1.202
0: +1.202 +3.222 +1.234 +2.345 +2.677 +3.333 +1.202 +1.202
0: +1.202 +3.222 +1.234 +2.345 +2.677 +3.333 +1.202 +1.202
0: +1.202 +3.222 +1.234 +2.345 +2.677 +3.333 +1.202 +1.202
etc.