How it Works
Rosemount Analytical
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RDO
Specifications
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Operating Manual
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Operating Manual
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Table of contents
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Rosemount Analytical RDO Operating Manual

Rosemount™ RDO
Optical Dissolved Oxygen Sensor and Analyzer
Manual
LIQ-MAN-RDO, Rev B
May 2017

Contents

Contents
1.1 Box contents .................................................................................................................................. 1
1.2 Optional mounting kit ....................................................................................................................1
1.3 Mounting options ...........................................................................................................................2
1.3.1 Analyzer dimensions ........................................................................................................2
1.3.2 Pipe mounting .................................................................................................................3
1.3.3 Wall mounting using mounting tabs ................................................................................5
1.3.4 Wall mounting with user-supplied screws and hardware ..................................................6
1.4 Installing dome connectors and plugs ............................................................................................ 7
2.1 Electrostatic discharge (ESD) recommendations ............................................................................ 9
2.2 Customer-supplied electrical equipment ........................................................................................9
2.3 Ensuring good electrical connections ............................................................................................. 9
2.4 AC power and high voltage relay connections .............................................................................. 10
2.5 Analog and digital outputs and low voltage relay connections ..................................................... 13
2.6 RDO probe wiring .........................................................................................................................16
2.7 Tighten dome connectors ............................................................................................................ 16
3.1 Unpacking ....................................................................................................................................17
3.2 Assembling the probe .................................................................................................................. 17
3.3 Installing the probe ...................................................................................................................... 18
4.1 Display and keypad ...................................................................................................................... 19
4.2 Using the view function and customizing the display ....................................................................21
5.1 Initial configuration ......................................................................................................................23
5.2 Menu tree .................................................................................................................................... 25
5.3 Configuring the RDO probes ........................................................................................................ 25
5.3.1 Options (Barometer, Salinity, and Calibration Interval) .................................................. 26
5.3.2 Parameters (Concentration, Temperature, Saturation, and Partial Pressure ...................26
5.3.3 Replacing a probe .......................................................................................................... 27
5.3.4 Deleting a probe ............................................................................................................ 28
5.3.5 Adding a probe .............................................................................................................. 28
5.4 Configuring the analyzer .............................................................................................................. 28
5.5 Configuring outputs .....................................................................................................................29
5.5.1 Current loops .................................................................................................................29
5.5.2 Alarm relays ................................................................................................................... 30
5.6 Changing the date and time .........................................................................................................32
5.7 Changing the appearance of the screens ......................................................................................32
5.7.1 Locking the display ........................................................................................................ 32
5.7.2 Changing the display contrast ....................................................................................... 32
5.7.3 Changing the language ..................................................................................................32
5.8 Changing power settings ............................................................................................................. 33
5.9 Setting the polling (update) interval .............................................................................................33
Manual i
Contents
5.10 RS485 communications ............................................................................................................... 33
5.10.1 Setting the device address for the analyzer .................................................................... 33
5.10.2 Setting RS485 parameters for the analyzer .................................................................... 33
5.11 Setting security codes .................................................................................................................. 34
5.12 Defaults ....................................................................................................................................... 34
5.13 Placing the output and relays on hold ...........................................................................................34
5.14 Diagnostics .................................................................................................................................. 35
6.1 Calibration options .......................................................................................................................37
6.2 One-point calibration (100% saturation) .......................................................................................38
6.3 Two-point calibration (100% and 0% saturation) ...........................................................................39
6.4 Concentration calibration .............................................................................................................41
7.1 Analyzer ....................................................................................................................................... 43
7.1.1 Cleaning the analyzer enclosure .................................................................................... 43
7.1.2 Replacing the dessicant ................................................................................................. 43
7.1.3 Replacing the clock battery ............................................................................................43
7.2 RDO probe ................................................................................................................................... 44
7.2.1 Cleaning the sensing cap ............................................................................................... 44
7.2.2 Cleaning the probe body ............................................................................................... 44
7.2.3 Cleaning the optical window ..........................................................................................44
7.2.4 Replacing the sensing cap ..............................................................................................45
7.2.5 Storing the probe .......................................................................................................... 46
7.3 Replacement parts ....................................................................................................................... 46
8.1 RDO probe ................................................................................................................................... 47
8.2 RDO analyzer ............................................................................................................................... 47
ii Rosemount RDO
1 Installation

1.1 Box contents

Remove the analyzer from the shipping box. The shipping box should contain:
• Analyzer (1)
• Enclosure plugs (5)
• Dome connectors (3)
• O-rings (6)
• Large lock nuts (6)
• Sealed dessicant pack (1) that will be placed in the installed analyzer
• Opened dessicant pack (1) that protected the instrument during shipping. Discard
after opening the analyzer.

Installation

WARNING!
Only properly trained and qualified personnel should install the RDO instrument described in this manual. This instrument should be installed for use in nonhazardous locations only.

1.2 Optional mounting kit

The mounting kit (PN R0087560) contains the following:
• Two stainless steel mounting brackets
• Two 1 1/2 to 3 1/2 in. diameter hose clamps
• One package containing mounting tabs (4), nuts (4), and screws (4)
• DIN rail mounting brackets
The nuts and screws supplied with the mounting tabs are suitable for use with the mounting brackets.
Manual 1
Installation

1.3 Mounting options

1.3.1 Analyzer dimensions

• Figure 1-1 calls out the analyzer dimensions with the lid closed.
Analyzer Dimensions with Lid ClosedFigure 1-1:
• Figure 1-2 shows the depth dimensions of the analyzer. When wall or panel
mounting, make sure to allow adequate space for opening the enclosure door or making electrical connections.
Side View Dimensional DrawingsFigure 1-2:
2 Rosemount RDO

1.3.2 Pipe mounting

Complete the following steps to mount the analyzer on a pipe.
1. Remove the four nuts and four screws from the mounting kit.
2. Open the enclosure and drop one nut into each drilled corner of the box (Figure 1-3).
Placing the Nut in the EnclosureFigure 1-3:
Installation
3. Use a screwdriver to push the nut down and set it in place (Figure 1-3).
Orient the two brackets on the back of the enclosure so that the flanges in the
4. brackets point downward (Figure 1-4).
Manual 3
Installation
Attaching the Mounting BracketsFigure 1-4:
5. Attach the mounting brackets to the enclosure using two screws for each bracket. Make sure that the screws properly thread into the nuts you seated in steps 2 and 3.
6. Place two hose clamps over the mounting pipe and tighten them until they are almost secure.
7. Place the flanges from the mounting bracket into each of the hose clamps (Figure 1-3).
8. Tighten the hose clamps until the analyzer is secure on the pipe.
4 Rosemount RDO
Installation
Back and Side View of Pipe-Mounted AnalyzerFigure 1-5:

1.3.3 Wall mounting using mounting tabs

The optional mounting kit contains a set of wall mounting hardware that includes four screws, nuts, and tabs for mounting the analyzer to a wall or panel. Follow the instructions included with the mounting tab hardware to attach the tabs (Figure 1-6).
Manual 5
Installation
Back View of Analyzer with TabsFigure 1-6:

1.3.4 Wall mounting with user-supplied screws and hardware

You can supply your own hardware and attach the analyzer to a wall.
Figure 1-3 indicates the placement of the nut. Use a screw that is best suited for your wall
material (Figure 1-7).
6 Rosemount RDO
Installation
Back View of AnalyzerFigure 1-7:

1.4 Installing dome connectors and plugs

Complete the following steps to install the dome connector and plugs.
1.
Place the O-ring over the threaded end of the connector or plug.
2. Screw the connector or plug into the opening until it is snug. Then tighten an additional 1/2 turn.
Do not overtighten.
3. Place the lock nut concave side down on the threads and, using a screwdriver blade and mallet, tighten the lock nut until there is approximately one thread showing.
4. Thread cable through the dome connectors and secure by tightening the nut to about 15 in.-lb of torque.
Confirm that cable does not slide or wiggle after the nut has been tightened. Leave sufficient cable inside the enclosure to make secure connections without placing stresss on the cable.
Manual 7
Installation
Attached plug (left) and attached dome connector (right)Figure 1-8:
8 Rosemount RDO
2 Wiring
WARNING!
Only properly trained and qualified personnel should install the RDO instrument described in this manual. This instrument should be installed for use in nonhazardous locations only.

2.1 Electrostatic discharge (ESD) recommendations

• Before making wiring connections or touching circuit boards or other internal
components, discharge any static electricity from your body by touching a grounded metal object.
• When making wiring connections, make sure to remain properly grounded by
wearing an ESD wriest strap or similar device.

Wiring

2.2 Customer-supplied electrical equipment

You must supply the following:
• 18-12 AWG wire for electrical connections using conduit or 100-240 Vac power
supply
• 24-12 AWG cable for connecting relays and PLC devices
• A 100-240 Vac or 9-36 Vdc source with over current/disconnect protection for hard-
wired locations using conduit
• Approved suitable wiring for cord-connected plug and socket locations

2.3 Ensuring good electrical connections

To ensure that all sensors and power sourced function properly, make sure that:
• Each individual wire is stripped and tinned to 1/4 in.
• Each wire is tightly screwed into the terminal strip.
• Each wire is touching the terminal strip. If the plastic wire jacket is clamped into the
terminal strip, connections will not be made.
• Clip or cap any unused wires.
Manual 9
Wiring

2.4 AC power and high voltage relay connections

The AC power board is located under the metal shield on the right side of the enclosure. The terminal strip on the board accommodates the AC power connections as well as two high voltage relay connections.
WARNING!
ELECTRIC SHOCK Make sure that power to the instrument is disconnected before making any wiring connections.
WARNING!
ELECTRIC SHOCK Do not connect low voltage circuits (< 50 V) to the terminal connectors on the AC board!
See Figure 2-1.
10 Rosemount RDO
Wiring
AC Circuit Board and Terminal ConnectionsFigure 2-1:
Procedure
1.
Remove the front cover of the enclosure.
2. Remove the metal AC power board cover.
3. Thread the power cable and relay wires (if needed) through the dome fittings
nearest the power board.
4. Using the green screw, connect the green earth wire of the power cable to the metal
frame in the bottom of the enclosure.
See Figure 2-2. A green wire connecting the metal frame to the terminal strip should already be in place.
Manual 11
Wiring
Figure 2-2:
Connect the Ground Wire to the Metal Frame Using the Green Screw
5. Connect the live and neutral power wires to the L and N terminals.
See Figure 2-1.
Terminal Description North America color Euro color
L Live Black Brown
N Neutral White Blue
Protective earth Green Green and yellow
6. Connect relay wires (if required) to the terminal strip.
See Figure 2-1.
Terminal Description
COM Common
NC1 or NC2 Normally closed
NO1 or NO2 Normally open
7. Replace the metal AC power board cover.
Replace the front cover of the enclosure.
8.
Be sure the dessicant pack (PN R0087630) is present.
12 Rosemount RDO

2.5 Analog and digital outputs and low voltage relay connections

Complete the following steps to connect the analog and digital outputs and low voltage relay.
WARNING!
ELECTRIC SHOCK Make sure that the power to the instrument is disconnected before making any wiring connections.
WARNING!
ELECTRIC SHOCK The maximum voltage that can be applied across the loop terminals is 36 V.
WARNING!
Wiring
ELECTRIC SHOCK Do not connect high voltage circuits (> 50 V) to the terminal connections on the I/O board!
Procedure
1. Remove the front cover of the enclosure.
2. Connect the digital output (Modbus/RS-485) to the PLC terminals.
See Figure 2-3. There is no connection to the GND and POWER terminals. However, the analyzer supplies 24 Vdc to the GND and POWER terminals, which can be used to power external accessories.
Terminal Description
GND Signal ground
485- RS-485 negative
485+ RS-485 positive
POWER 24 Vdc
Manual 13
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