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H-340 sdi – Xylem H-340SDI User Manual

Page 26

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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"

1 sec 1

Set offset to 1.234

Subsequent Command

Response

---------------------------

------------------------------------

"aD0"

a+123.4

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"

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.