Xylem H-335 - Manual (Page 29)

H-335
SDI-12 Command and Response Protocol 2-13
Example of a H-335 Extended "Zero Offset" command:
Command Response Time Values Description
"aXZO!" "a0031" 3 sec 1 Zero the UserAngle
Subsequent Command Response
"aD0" a+12.000
The new UserAngleOffset
2.13 Extended “XZO” Command
This command is used to automatically zero the gate angle offset. The “aXZO” command
causes the H-335 to make a fresh angle measurement and use this value to automatically update the
UserAngleOffset value to produce a UserAngle reading = 0.00
Make certain the gate is fully closed and resting on the sill. Wait at least 15 minutes or so after
applying +12V power for the sensor temperature to stabilize before issuing the “aXZO” command.
This command should be used only during installation or maintenance.