In-situ RDO PRO-X, Operator'S Manual, Page: 3 / 29

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Table of Contents
1 Optical RDO PRO-X Dissolved Oxygen Probe Specifications
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2 Introduction
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System Description 6
Serial Numbers 7
Unpack the Probe 7
3 Calibrate the RDO PRO-X Probe
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1-Point Calibration 9
Water-Saturated Air 9
2-Point Calibration 9
100% and 0% Saturation 9
4 Probe Deployment
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5 Care and Maintenance
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Clean the Sensor Cap 12
Clean the Optical Window 12
Clean the Probe 12
Sensor Cap Storage 12
Replace the Sensor Cap 12
Maintain Desiccant 13
6 Controller Requirements and Connections
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Wiring Overview 14
Analog (4-20 mA) 3-wire 15
SDI-12 (3-wire) 16
Modbus Master with Built-in RS485 17
Modbus Master with Built-in RS232 (Converter Required) 18
Converter 19
Power Connections 19
Communications 19
7 Modbus Registers
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Common Registers 20
Sensor Status Registers 20
Device Specific Register 0042 Data Quality ID 20
Device Specific Registers 21
8 Dissolved Oxygen Equations
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Dissolved Oxygen Concentration 22
Dissolved Oxygen, % Saturation 23
9 Calibration Registers
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Live Salinity Value 24
Default Salinity Value 24
Live Barometric Pressure 24
Default Barometric Pressure 24