Xylem H-310 - Manual (Page 34)

D-2 Appendix D H-310 Extended Commands
H-310
D.2 Zero Offset Command
Command Response Description
"aXZ!" "atttn<cr><lf>" Zero the sensor offset
Where:
a Is the sensor address (0-9,*).
XZ Are upper-case ASCII characters.
ttt Is a three digit integer (000-999) specifying the maximum time, in seconds, the sensor will take to
have data available in its buffer.
n Is a single digit integer (0-9) specifying the number of values that will be placed in the data buffer.
If "n" is zero (0), no data will be available using subsequent "D" commands.
The Zero Offset command measures the current pressure and automatically adjusts the sensor's
offset to produce a zero output value. The new offset is stored in non-volatile EEPROM within
the sensor. The data generated in response to this command is the new value. The user must
manually pull the sensor from the water or position it at the desired zero reference before issuing
this command.
Example of a "Zero Offset" command:
Command Response Time Values Description
"aXZ!" "a0081<cr><lf>" 8 sec 1 Zero the sensor offset