Xylem H-3531 FlashLite - Manual (Page 54)

5-16 SDI-12 Command and Response Protocol
H-3531
5.15 Extended Read/Write 0-5V_Hi and Read/Write 0-5V_Lo
The H-3531 FlashLite™ scales the current Stage data to drive the 0-5V analog output. The 0-
5V_Hi and 0-5V_Lo settings control how the Stage data is processed. The 0-5V_Lo should be set
to the desired Stage corresponding to a 0.00V output. The 0-5V_Hi should be set to the desired
Stage corresponding to a 5.00V output. These settings are stored in non-volatile EEPROM within
the sensor. Once the new value is written to the EEPROM, a copy is sent to the sensor data buffer
for verification. This data can be viewed by using a subsequent "aD0" command. To verify these
settings any other time, use the “XRVH" or “XRVL” commands. The H-3531 FlashLite™ comes
from the factory with 0-5V_Hi = 34.6 feet and 0-5V_Lo = 0.00 feet.(0-15 psi sensor range)
Command Response Description
"aXRVH!" “a0011" Read 0-5V_Hi
"aXRVL!" “a0011" Read 0-5V_Lo
"aXWVHddd!" “a0061" Write 0-5V_Hi
"aXWVLddd!" “a0061" Write 0-5V_Lo
Where: a is the sensor address ("0-9", "A-Z", "a-z", "*", "?").
XRVH are upper case characters.
XRVL are upper case characters.
XWVH are upper case characters.
XWVL are upper case characters.
ddd is the new value.
This command takes 001 seconds to complete and places 1 value in the data buffer. Use the
“aD0" command to collect and view the slope or offset.
Example of a H-3531 Extended "Read 0-5V_Hi" command:
Command
Response Time Values Description
"aXRVH!" "a0011" 1 sec 1 Read 0-5V_Hi
Command Response Description
"aD0!" "a+34.60" 0-5V_Hi is 20.00
Example of a H-3531 Extended "Write 0-5V_Hi" command:
Command
Response Time Values Description
"aXWVH34.6!" "a0061" 6 sec 1 Write 0-5V_Hi and make new
measurement
Command Response Description
"aD0!" "a+34.6" 0-5V_Hi is 34.6