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mg/L Calibration
ODO mg/L calibration is accomplished by writing an entire block of values (non-divisible) using a write multiple registers
command (function code 0x10). Last calibration time can subsequently be read to verify. Salinity values are required for ODO
mg/L calibration. If conductivity values are available (ODO/CT), the user-provided salinity value will be overridden with the internal
salinity calculation. The user may just set this value to zero.
Address
Description
0x0240
ODO mg/L Calibration Time (s) [3:0]
0x0241
0x0242
ODO mg/L Calibration Value (mg/L) [3:0]
0x0243
0x0244
ODO mg/L Calibration Salinity (ppt) [3:0]
0x0245
Request
Function Code
Register Address
Number Registers
Byte Count
Register Values
Modbus Configuration & Commands
1 byte
2 bytes
2 bytes
1 byte
12 bytes
0x10
0x0240
0x0006
0x0C
ODO mg/L Calibration Time (s) [3:0]
ODO mg/L Calibration Value [3:0]
ODO mg/L Calibration Salinity (ppt) [3:0]
20
R/W
Type
Default
W
U32
N/A
W
Float
N/A
W
Float
N/A
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