H-312 – Xylem H-312-22 User Manual
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H-312
SDI-12 Command and Response Protocol 4-9
4.9 Extended Set_Current_Stage Command
The H-312 processes the pressure sensor input and computes Pressure in PSI units. Stage is
computed with a Stage = m * Pressure + b equation. During installation it is convenient to quickly
set the H-312's Stage reading to match the current stage or elevation of the water as determined by
a staff gauge or other datum. This command causes the H-312 to make a fresh measurement and
automatically update the Offset (b) term as needed to produce the desired Stage.
Example of a H-312 Extended "Set Current Stage" command:
Command
Response
Time
Values Description
"aXSCS2.3!"
"a0031
3 sec
1
Set the Stage to 2.3
Subsequent Command
Response
Description
"aD0"
a+12.80
The new Offset