Xylem H-3551 - Manual (Page 20)

5-2 SDI-12 Command and Response Protocol
H-3551
5.1 Command Summary
The H-3551 supports the following SDI-12 commands:
Standard Commands:
aM! Initiate purge
aM1! Initiate measurement
aM2! Initiate special measurement
aD0!
Send data
aV! Verify
aI! Send identification
a! Send acknowledge
aAn! Change address
Extended Commands:
aXRBR! Read bubble rate
aXWBRnn! Write bubble rate
aXRPP! Read purge pressure
aXWPPnn! Write purge pressure
aXRPT! Read purge time
aXWPTnn! Write purge time
aXTPM! Test pump motor
aXTPV! Test purge valve
aXTAZ! Test auto-zero valve
aXCOP! Test the COP timer
aXTEST! Display the current settings
aXHELP! Display the supported commands