Xylem H-3531 FlashLite - Manual (Page 65)

H-3531
SDI-12 Command and Response Protocol 5-27
5.20.6 H-355 Read/Write Purge Threshold Command
This command is for reading the current purge threshold and also for editing the purge
threshold. The user can change the purge threshold from 10 to 65 psi. Refer to H-355 Gas
Purge System manual for more details.
Command Response Description
“aXRPT!” “a0051” Read Purge Threshold
“aXWPTdd!” “a0051” Write Purge Threshold
Where: a is the sensor address ("0-9", "A-Z", "a-z", "*", "?").
XRPT are upper case characters.
XWPT are upper case characters.
dd is the purge threshold desired(10-65)
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 Threshold" command:
Command
Response Time Values Description
"aXRPT!" "a0051" 5 sec 1 Read Purge Threshold
Command Response Description
"aD0!" "a+15" 15 PSI Purge Threshold
Example of a H-3531 Extended "Write Purge Threshold" command:
Command
Response Time Values Description
"aXWPT20!" "a0051" 5 sec 1 Write Purge Threshold
Command Response Description
"aD0!" "a+20" 20 PSI Purge Threshold