Xylem H-4280 - Manual (Page 25)

H-4280
SDI-12 Command and Response Protocol 3-13
3.10 Extended Set_Current_Stage Command
The H-4280 processes each voltage measurement with a y=mX+b linear equation. During
installation it is often convenient to quickly set the H-4280's measurement output to a certain
value. For example, the output can be quickly set to match the current stage of a water elevation
sensor as determined by a staff gauge or other datum. The “XSCS” extended command causes
the H-4280 to make a fresh measurement and automatically update the Offset (b) term as needed
to produce the desired value.
Command
"aXSCSn ddd!"
Where: a is the sensor address ("0-9", "A-Z", "a-z", "*", "?").
XSCS are upper case characters
n is the channel number (0-7)
ddd is the new stage setting
(Note: there must be a space between the n and ddd arguments)
This command places 1 value in the data buffer. Use the “aD0" command to collect and view the
current value.
Example of a H-4280 Extended "Set Current Stage" command:
Command Response Time Values Description
"aXSCS3 2.34!" "a0031" 3 sec 1 Set the Stage to 2.34
Subsequent Command Response Description
"aD0" a+12.80 The new Offset for channel 3