H-340 sdi – Xylem H-340SDI User Manual
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2-12 SDI-12 Command and Response Protocol
H-340SDI
Example of a H340SDI extended "Write Offset" command:
Command
Response
Tim Values
Description
-------------
--------------------- ------- -------- -------------------------------
"aXWO1.234!" "a0011<cr><lf>"
1 sec 1
Set offset to 1.234
Subsequent Command
Response
---------------------------
------------------------------------
"aD0"
a+123.4<cr><lf>
This command takes 001 seconds to complete and places 1 value in the data buffer. Use the “aD0"
command to collect and view the data.
2.14 Extended “Get Time” Command
The H-340SDI has a built-in real time clock. This command allows the user to read the current time
of day.
Command
Response
Description
-------------
-------------------------
-----------------------------
"aXGT!"
"a0013<cr><lf>"
Read time of day
Where:
a
is the sensor address ("0-9", "A-Z", "a-z", "*", "?").
XGT
are upper case characters
This command takes 001 seconds to complete and places 3 values in the data buffer. Use the “aD0"
command to collect and view the data.