Xylem H-3531 FlashLite - Manual (Page 62)

5-24 SDI-12 Command and Response Protocol
H-3531
5.20.3 H-355 Read/Write Purge Pressure Command
This command is for reading the current purge pressure and also for editing the purge
pressure. The user can change the purge pressure from 15 to 80psi. Refer to H-355 Gas
Purge System manual for more details.
Command Response Description
“aXRPP!” “a0051” Read Purge Pressure
“aXWPPdd!” “a0051” Write Purge Pressure
Where: a is the sensor address ("0-9", "A-Z", "a-z", "*", "?").
XRPP are upper case characters.
XWPP are upper case characters.
dd is the purge pressure value desired(15-80).
This command takes 005 seconds to complete and places 1 value in the data buffer. Use
the “aD0" command to collect and view the current value.
Example of a H-3531 Extended "Read Purge Pressure" command:
Command
Response Time Values Description
"aXRPP!" "a0051" 5 sec 1 Read Purge Pressure
Command Response Description
"aD0!" "a+60" 60 PSI
Example of a H-3531 Extended "Write Purge Pressure" command:
Command
Response Time Values Description
"aXWPP80!" "a0051" 5 sec 1 Write Purge Pressure
Command Response Description
"aD0!" "a+80" 80 PSI