In-Situ RDO PRO-X Process Optical Dissolved Oxygen Sensor Manual - Manual (Page 24)

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Calibration Registers
Register Size
Mode & Access
Level (R/W)
Data Type Description
0118 2 R1/W3 float Live salinity value (PSU)
0120 2 R1/W3 float Default salinity value (PSU, default = 0.0)
0122 2 R1/W3 float Live barometric pressure (mbar)
0124 2 R1/W3 float Default barometric pressure (mbar, default = 1013.25)
0126 2 R1/W3 float 100% saturation calibration reading (mg/L)
0128 2 R1/W3 float 100% saturation temperature reading (°C)
0130 2 R1/W3 float 100% saturation salinity value (PSU)
0132 2 R1/W3 float 100% saturation barometric pressure (mbar)
0134 2 R1/W3 float 0% saturation calibration reading (mg/L)
0136 2 R1/W3 float 0% saturation temperature reading (°C)
0138 2 R1/W3 float Calibration slope (default = 1.0)
0140 2 R1/W3 float Calibration offset (default = 0.0)
Live Salinity Value
The live salinity value is used to correct the oxygen concentration value for salinity.
Values must be written in Practical Salinity Units (PSU) in the range 0 to 42 PSU. This
is not a measured parameter.
Default Salinity Value
The default salinity value is loaded into the live salinity value register when power is
first applied to the probe. The default salinity value is used in calculations until a live
salinity value is written. This is not a measured parameter.
Live Barometric Pressure
The live barometric pressure is used in the calculation of percent saturation and to
determine the theoretical saturation point during calibration. Values must be written in
millibars in the range 506.625 to 1114.675 mbar. This is not a measured parameter.
Default Barometric Pressure
The default barometric pressure is loaded into the live barometric pressure register
when power is applied to the probe. The default barometric pressure is used in
calculations until a live barometric pressure is written. This is not a measured
parameter.
100% Saturation Calibration Values
These values represent the sensor conditions while the probe is in a 100% saturation
calibration environment. These are not measured values, they are written by the
controller during the calibration process.