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RDO
Operating Manual
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Operating Manual
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Specifications
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Rosemount Analytical RDO Operating Manual

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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
Wiring
Input/output boardFigure 2-3:
3. Wire the analog current loops to the 4-20 mA terminals.
Each analog output loop must be powered separately. The maximum voltage at the terminal must not exceed 36 Vdc. The minimum voltage is 9 Vdc.
Terminal Description
LOOP2- To negative end of device
LOOP2+ To positive end of device
LOOP1- To negative end of device
14 Rosemount RDO
Terminal Description
LOOP1+ To positive end of device
GREEN EARTH Cable shield
4. Connect the shield to the green earth ground screw.
See Figure 2-4. Do not ground the device at both ends of the cable.
Earth Ground Screws for Analog Outputs and SensorsFigure 2-4:
Wiring
5. Make the low voltage relay connections.
Important
Do not apply more than 50 V across the low voltage relays.
Terminal Description
GND Signal ground
COM1 or COM2 Common
NC1 or NC2 Normally closed
NO1 or NO2 Normally open
6. Replace the front cover of the enclosure.
Be sure the dessicant pack (PN R0087630) is present.
Manual 15
Wiring

2.6 RDO probe wiring

Complete the following steps to wire the RDO probe.
WARNING!
ELECTRIC SHOCK Make sure that power to the instrument is disconnected before making any wiring connections.
Procedure
1. Remove the front cover of the enclosure.
2. Wire the RDO probe to the PROBE A or PROBE B terminals on the input/output card.
Terminal Description Wire color
GND Signal ground Black
485A- RS485 negative Green
485+ RS485 positive Blue
POWER Input DC/Output AC Red
GREEN EARTH Shield Shield
3. Connect shield wire to the green earth ground screw.
See Figure 2-4.
4. Cut off or cap the unused brown and white wires.
5. Replace the front cover of the enclosure.
Be sure that the dessicant pack (PN R0087630) is present.

2.7 Tighten dome connectors

The dome connectors installed in Section 1.4 must be tightened securely after the sensor and electrical cables have been routed through them. The dome connectors are not meant to be weight bearing. Be sure that:
• The cable does not slide or wiggle after the nut has been tightened.
• Sufficient cable has been threaded through the connector so that secure wiring
connections remain secure.
• There is no weight or force from water pulling on the cable.
16 Rosemount RDO

Placing the RDO probe in service

3 Placing the RDO probe in service

3.1 Unpacking

Remove the probe and sensing cap from the box. The sensing cap is shipped in a small plastic cylinder inserted in a hole in the internal cardboard packaging.

3.2 Assembling the probe

Complete the following steps to assemble the RDO probe.
1. Unscrew the nose cone from the probe and remove the red protective dust cap.
Save the dust cap for later use. Make sure the O-ring grooves are dry and the O-rings are not rolled or pinched.
2. Remove the RDO sensing cap from its shipping/storage sleeve.
The expected operating lifetime of the cap is two years after the first reading has been taken. Install the cap by the date printed on the packaging (for PN R00804230X only).
Note
Keep the cap in its sealed packaging until you are ready to install it. Install promptly. Avoid allowing moisture, including humidity, inside the cap.
3. Align the arrow on the cap with the index mark on the probe and firmly press the cap
onto the probe, without twisting, until it seals.
Manual 17
Placing the RDO probe in service
4. Reattach the nose cone.
Note
The nose cone must be in place whenever the probe is submerged in water.
5. Wire the probe to the analyzer.
See Section 2.6.
Note
If you are replacing an existing RDO probe with a new probe, the analyzer may not recognize the new probe. If this is the case, the main display will show the probe not talking icon (letter A or B in reverse video). To establish communication, follow the procedure in Section 5.3.

3.3 Installing the probe

The RDO dissolved oxygen probe can be submerged in basins or ponds.
The nose cone and the thermistor (the small metal disc on the side of the sensor about 1/6 in. [3 mm] above the nose cone) must be completely submerged. Use the 1 1/4 in. FNPT fitting at the rear of the probe to attach it to a pipe. Be sure the connection is watertight and the upper end of the pipe is closed to keep out water.
CAUTION!
EQUIPMENT DAMAGE
Do not allow the back end of the sensor to get wet.
18 Rosemount RDO
4 Display and Operation

4.1 Display and keypad

Figure 4-1 shows the keypad and display window.
Keypad and displayFigure 4-1:

Display and Operation

The Up/Left arrow key has three functions: it moves the cursor to the left; it moves the cursor up a list; it increases the value of a digit. The Down/Right arrow key has three functions: it moves the cursor to the right; it moves the cursor down a list; it reduces the value of a digit. The left and right function keys perform the operation shown in the screen immediately above the key.
The main display has two lines. The measurement from probe A appears in the top line, and the measurement from probe B appears in the bottom line. If no probe B is connected, a row labeled C appears. References to probe C refer to the analyzer, which is called the ConTROLL Pro. See Figure 4-2.
Manual 19
Display and Operation
Two-line displayFigure 4-2:
Lines labeled A and B refer to probes A and B. C refers to measurements made by the analyzer. See also
Section 4.2.
Display Icons and Their DescriptionsTable 4-1:
Icon Description
Error with parameter
Calibration stabilizing
Calibration stable
View
View locked
View unlocked
Factory calibration for RDO cap has expired.
User calibration has expired, based on the Calibrate Interval.
Probe A not talking
Probe B not talking
Relay 1 active
Relay 2 active
20 Rosemount RDO
Display and Operation

4.2 Using the view function and customizing the display

The view function allows you to view parameters measured by each probe and the analyzer. It also allows you to customize the display.
1. Select the View option.
An arrow points to the first line in the display.
2. Select View again to move the arrow to the second line in the display.
3. With the arrow pointing at any line, use the Up and Down arrow keys to cycle
through the parameters being measured by the probe and analyzer.
4. To customize the display, move the arrow to the desired line and press the Up or
Down arrow key until the desired measurement appears. Then select View to move to the next line.
Manual 21
Display and Operation
22 Rosemount RDO
5 Programming the analyzer

5.1 Initial configuration

Enter the following information upon first use or any time after you have restored the default settings.
1. Choose English, Spanish, or French. Use the arrow keys to move up or down to the
appropriate language. Select Enter.
2. Use the arrow keys to adjust the contrast level. Select Enter.
3. Enter the time zone.
a. Refer to Table 5-1. Choose the appropriate time zone and find the corresponding
UTC value (Universal Time, Coordinated, formerly GMT).
Selected Regions and Their Time in UTCTable 5-1:
Region UTC value (± numeric value)
Australia Northern Territory +9.5
Australia Lord Howe Island +10.5 (Daylight Savings Time +11)
Australia New South Wales +10 (Daylight Savings Time +11)
Australia Queensland +10
Australia Victoria +10 (Daylight Savings Time +11)
Australia Australian Cap. Terr. +10 (Daylight Savings Time +11)
Australia South +9.5 (Daylight Savings Time +10.5)
Australia Tasmania +10 (Daylight Savings Time +11)
Australia Western +8
Canada Central -6 (Daylight Savings Time -5)
Canada Eastern -5 (Daylight Savings Time -4)
Canada Mountain -7 (Daylight Savings Time -6)
Canada Yukon & Pacific -8 (Daylight Savings Time -7)
Canada Atlantic -4 (Daylight Savings Time -3)
Canada Newfoundland -3.5 (Daylight Savings Time -2.5)
England 0 hours (Daylight Savings Time (+1)
USA Puerto Rico -4
USA Central -6 (Daylight Savings Time -5)
USA Eastern -5 (Daylight Savings Time -4)
USA Mountain -7 (Daylight Savings Time -6)
USA Arizona -7
USA Indiana East -5

Programming the analyzer

Manual 23
Programming the analyzer
4. Enter the date using the Up/Left arrow key. Select Enter.
5. Enter the time using the Up/Left arrow key. Select Enter.
Selected Regions and Their Time in UTC (continued)Table 5-1:
Region UTC value (± numeric value)
USA Pacific -8 (Daylight Savings Time -7)
USA Alaska -9 (Daylight Savings Time -8)
USA Aleutian -10
USA Hawaii -10
b. Use the Up/Left arrow key to enter a positive or negative value.
c. Press the Down/Right arrow key to move to the appropriate numeric position.
d. Use the Up/Left arrow key to enter the correct numeric value. Repeat for
additional digits as needed.
e. Select Enter.
The Add Probe A screen appears. The name of the probe wired in the position also appears.
6. Select Enter to configure this probe.
The Add Probe B screen appears. The name of the probe wired in this position also appears. If there is no probe B, the display shows Probe not connected.
7. Select Enter to configure this probe if it exists or to proceed to the next screen if it
does not.
The main display appears.
For additional information on setting up the probes, see Section 5.3.3 and Section 5.3.4.
24 Rosemount RDO
5.2 Menu tree
The menu tree for the analyzer is shown in Figure 5-1.

Menu TreeFigure 5-1:

Calibrate Hold outputs Settings Diagnostics
Saturation One point Two point
Concentration
Default
Programming the analyzer
Menu
Probes (A or B)
Options Barometer Salinity Cal Interval
Parameters
Concentration* Temperature* Saturation* Pressure*
Replace probe
Delete probe
Probe C
(analyzer)
Barometer*
Temperature*
Outputs
Current loops Enable/disable Parameter 4-20 mA values Trim
Relays
Enable/disable High/low Parameter Setpoint Deadband Test
Date and
time
Note
*For each parameter:
• Enable or disable
• Choose units
• Choose resolution
• Set sentinel

5.3 Configuring the RDO probes

Display
Lock/unlock
Contrast
Language
Power save
Polling interval
Communications
Device address
RS485 parameters
Security code
Default
Configure the RDO probes one at a time.
There are four submenus available for each probe: Options, Parameters, Replace Probe, and Delete Probe.
Manual 25
Programming the analyzer

5.3.1 Options (Barometer, Salinity, and Calibration Interval)

Three settings can be made under Options.
• Barometer: The analyzer has a built-in pressure sensor to measure barometric
pressure, which is needed for percent saturation (air) calibration. Emerson strongly recommends the use of automatic barometric pressure.
• Salinity: Salinity is an important setting if dissolved oxygen is being measured in
brackish water and percent saturation (air) calibration is being used to calibrate the probe.
• Calibration Interval: The analyzer can be programmed to remind you when a calibration
is due.
1.
Select Menu > Settings > Probes. Select RDO Probe A or RDO Probe B, if it is present, and then select Options.
2. Scroll to Barometer and then select it. The choices are Fixed and Automatic. If you choose Fixed, enter the barometric pressure here before you start percent saturation (air) calibration. If you choose Automatic, the analyzer automatically measures the barometric pressure and uses it during percent saturation (air) calibration.
3. Scroll to Salinity and select it. Choose Fixed. Automatic is not available. Enter the salinity of the process water in PSU (practical salinity units in parts per thousand).
4. Scroll to Calibration Interval. Select a calibration interval. The analyzer will display a message when the next calibration is due.

5.3.2 Parameters (Concentration, Temperature, Saturation, and Partial Pressure

Each RDO probe can measure concentration, temperature, percent saturation, and partial pressure. There are four settings to make for each parameter.
• Enable or disable the measurement. If the measurement is enabled, the probe
makes the measurement, and the analyzer displays the result. If the measurement is disabled, the probe does not make the measurement.
• Select units in which measurement results will be displayed.
• Set the display resolution.
• Set a sentinel. The sentinel is the value that will be displayed when the probe returns
an error condition for the measurement.
Procedure
1.
Select Menu > Settings > Probes.
2. Select RDO Probe A or RDO Probe B, if it is present, and then select Parameters.
3. Select Concentration.
a. Press the Select key to toggle between Enable and Disable.
If the box is checked, Concentration has been selected.
b. Scroll to Units and select it. Choose between mg/L and ug/L.
26 Rosemount RDO
Programming the analyzer
c. Scroll to Resolution. Press Select repeatedly to change the resolution.
The setting is stored as soon as you press any key to leave.
d. Scroll to Sentinel and press Select. Use the arrow keys to change the setting.
4. Select Temperature.
a. Press Select to toggle between Enable and Disable.
If the box is checked, Temperature has been selected.
b. Scroll to Units and select it. Choose between °C and °F.
c. Scroll to Resolution. Press Select repeatedly to change the resolution.
The setting is stored as soon as you press any key to leave.
d. Scroll to Sentinel and press Select. Use the arrow keys to change the setting.
5. Select Saturation.
a. Press Select to toggle between Enable and Disable.
If the box is checked, Percent Saturation has been selected.
b. Scroll to Units.
There is no selection to make. the units are % saturation.
c. Scroll to Resolution. Press Select repeatedly to change the resolution.
The setting is stored as soon as you press any key to leave.
d. Scroll to Sentinel and press Select. Use the arrow keys to change the setting.
6. Select Pressure.
a. Press Select to toggle between Enable and Disable.
If the box is checked, Partial Pressure has been selected.
b. Scroll to Units.
There is no selection to make. The units are torr.
c. Scroll to Resolution. Press Select repeatedly to change the resolution.
The setting is stored as soon as you press any key to leave.
d. Scroll to Sentinel and press Select. Use the arrow keys to change the setting.

5.3.3 Replacing a probe

If you replace the RDO probe with another RDO probe, use Replace Probe to transfer the existing setting to the new probe.
Manual 27
Programming the analyzer
1. Disconnect the existing RDO probe and replace it with the new probe.
See Section 3.3.
2. Select Menu > Settings > Probes. Select RDO Probe A or RDO Probe B, if it is present,
and then select Replace Probe.
The analyzer automatically configures the new probe.
3. Press and hold Back to return to the main display.

5.3.4 Deleting a probe

If you plan to permanently remove a probe, follow the steps below.
1.
Select Menu > Settings > Probes.
2. Highlight the probe you wish to delete and press Select.
3. Scroll to Delete Probe.
4. Press Select and then Enter to confirm.
The probe is deleted from the configuration.

5.3.5 Adding a probe

To add a probe, follow the steps below.
1.
Select Menu > Settings > Probes.
2. Select Probe A or Probe B and then Add Probe.
The Add Probe screen appears with the name of the sensor that is wired in this position. If there is no Probe B, the display says No probe connected.
3. Select Enter to add the probe.

5.4 Configuring the analyzer

The analyzer (called the ConTROLL PRO) measures two parameters, barometric pressure and temperature. There are four settings to make for each parameter.
• Enable or disable the measurement. If the measurement is enabled, the analyzer
makes the measurement and displays the result. If the measurement is disabled, the analyzer does not make the measurement.
• Select units in which measurement results will be displayed.
• Set the display resolution.
• Set a sentinel. The sentinel is the value that will be displayed when the analyzer
returns an error condition for the parameter.
Procedure
1.
Select Menu > Settings > Probes. Select ConTROLL PRO.
28 Rosemount RDO
Programming the analyzer
2. Select Barometer.
a. Press Select to toggle between Enable and Disable.
If the box is checked, barometric pressure has been selected.
b. Scroll to Units and select it. Choose the desired units for barometric pressure.
c. Scroll to Resolution. Press Select repeatedly to change the resolution.
The setting is stored as soon as you press any key to leave.
d. Scroll to Sentinel and press Select. Use the arrow keys to change the setting.
3. Select Temperature.
a. Press Select to toggle between Enable and Disable.
If the box is checked, temperature has been selected.
b. Scroll to Units and select it. Choose the desired units for temperature.
c. Scroll to Resolution. Press Select repeatedly to change the resolution.
The setting is stored as soon as you press any key to leave.
d. Scroll to Sentinel and press Select. Use the arrow keys to change the setting.

5.5 Configuring outputs

Outputs refer to the analog current loops and the alarm relays.
Important
Configure the probes before configuring the outputs.

5.5.1 Current loops

There are six settings to make:
• Enable/Disable: Choose to enable or disable the output loop.
• Parameter: Assign a probe and parameter to the output.
• 4 mA Value: Enter the value to correspond with 4 mA.
• 20 mA Value: Enter the value to correspond with 20 mA.
• 4 mA Trim: Adjust the 4 mA value of the analyzer to achieve a loop current of 4 mA.
• 20 mA Trim: Adjust the 20 mA value of the analyzer to achieve a loop current of
20 mA.
Procedure
1.
Select Menu > Settings > Outputs > Current Loops.
2. Choose current loop 1 or current loop 2.
3. Scroll to Enable/Disable and select it. Press Select to toggle between Enable and Disable.
Manual 29
Programming the analyzer
If the box is checked, the current loop has been enabled.
4. Scroll to Parameter and select it. Scroll through the list of probes and measurements.
A is probe A, B is probe B, and C is the analyzer.
5. Scroll to 4 mA value and select it. Use the arrow keys to change the setting.
6. Scroll to 20 mA value and select it. Use the arrow keys to change the setting.
7. Scroll to 4 mA Trim. Use the arrow keys to adjust the loop current to 4 mA.
8. Scroll to 20 mA Trim. Use the arrow keys to adjust the loop current to 20 mA.

5.5.2 Alarm relays

There are six settings to make.
• Enable/Disable: Choose to enable or disable the relay.
• Mode: Choose High Alarm or Low Alarm.
• Parameter: Assign a probe and a parameter to the relay.
• Setpoint: See Figure 5-2.
• Deadband: See Figure 5-2.
• Test: Manually energize or de-energize a relay to test it.
30 Rosemount RDO
Programming the analyzer
High and Low Alarm Relay ActionFigure 5-2:
Procedure
Select Menu > Settings > Outputs > Relays.
1.
2. Choose Relay 1 or Relay 2.
For each relay, there is a high voltage and low voltage relay. Configuring the relay configures both the high voltage and low voltage relay.
3. Scroll to Enable/Disable and select it. Press Select to toggle between Enable and
Disable.
If the box is checked, the relay has been enabled.
4. Scroll to Mode and select it. Choose High alarm or Low alarm.
5. Scroll to Parameter and select it. Scroll through the list of probes and measurements.
A is probe A, B is probe B, and C is the analyzer.
6. Scroll to Setpoint and select it. Use the arrow keys to change the setting.
7. Scroll to Deadband and select it. Use the arrow keys to change the setting.
Manual 31
Programming the analyzer
8. Scroll to Test and select it. Use the arrow keys to change from yes to no.

5.6 Changing the date and time

Complete the following steps to change the date and time on the RDO analyzer.
1.
Select Menu > Settings > Date & Time.
Three menu items appear:
• Date shown as yyyy-mm-dd
• Time shown as hh:mm:ss (24 hour clock)
• UTC shown as ±xx:xx (see Table 5-1)
2. Scroll to the menu item and select it.
3. Use the arrow keys to change the setting.
4. Select Enter.

5.7 Changing the appearance of the screens

5.7.1 Locking the display

Locking the display prevents the operator from scrolling through the measurement parameters using the View function.
1.
Select Menu > Settings > Display.
2. Choose Lock View.
3. Use Select to toggle between the lock view and the unlocked view.
The lock symbol at the top of the screen shows whether the screen is locked or unlocked.

5.7.2 Changing the display contrast

Complete the following steps to brighten or darken the screen.
1.
Select Menu > Settings > Contrast.
2. Use the arrow keys to brighten or darken the screen.
3. Press Enter.

5.7.3 Changing the language

Complete the following steps to change the language.
1. Select Menu > Settings > Language.
2. Choose English, Spanish, or French.
32 Rosemount RDO
3. Press Enter.

5.8 Changing power settings

To conserve power the analyzer can be set to turn off the display after idling for a certain length of time.
1. Select Menu > Settings > Power Save.
2. Select External.
Do not choose Battery.
3. Select the appropriate interval - Off (always on), 15 sec, 30 sec, 1 min, 5 min, or 15 min.

5.9 Setting the polling (update) interval

The polling interval specifies how often the analyzer checks the probe and updates the configured outputs when the analyzer is in power saving mode. See Section 5.8. The default polling rate is every 15 minutes. The fastest polling rate is every minute; the slowest is every 24 hours.
Programming the analyzer
Important
If the analyzer is not in power saving mode, the display, relays, and outputs update once every 5 sec.
Procedure
1.
Select Menu > Settings > Polling Interval.
2. Select the desired interval.
3. Press Enter.

5.10 RS485 communications

5.10.1 Setting the device address for the analyzer

The device address is a number between 1 and 245. The device address of Probe A is the analyzer address plus 1. The device address of Probe B is the analyzer address plus 2.
1. Select Menu > Settings > Communications > Address.
2. Use the arrow keys to enter a number between 1 and 245.
3. Press Enter.

5.10.2 Setting RS485 parameters for the analyzer

Complete the following steps to set the RS485 parameters for the analyzer.
Manual 33
Programming the analyzer
1. Select Menu > Settings > Communication > RS485.
There are six settings to make:
• Mode (choose RTU or ASCII)
• Baud Rate (choose 9600, 19200, 38400, or 57600)
• Data Bits (choose 8)
• Parity (choose Even, Odd, or None)
• Stop Bits (choose 1 or 2)
• Defaults (choose yes to restore RS485 default settings)
2.
Scroll to the menu item and select it.
3. Use the arrow keys to change the setting.
4. Press Enter.

5.11 Setting security codes

You may set up the analyzer with passwords for an administrator and a user. The user can access the Calibrate, Hold, Options, and Diagnostics menus. The administrator can access all functions, most notably the Settings menu. If there is no administrator code set, the user becomes the default administrator and can access all functions. To remove pass code­protected access, enter 0000 for all codes.
1.
Select Menu > Settings > Security Code.
2. Select Administrator and enter a 4-digit code for the Administrator using the arrow
keys. Press Enter.
3. Select User. Set a 4-digit code for the User using the arrow keys. Press Enter.

5.12 Defaults

Selecting defaults returns all user settings and calibrations to factory default values.
The display also returns to the initial configuration screens described in Section 5.1.

5.13 Placing the output and relays on hold

Occasionally, you may wish to temporarily pause the outputs.
1.
Select Menu, then Hold Outputs.
All measurement updates stop, the current values and outputs are held, and the phrase Hold Outputs appears at the top of the main display.
2. To take the analyzer out of hold, select Resume.
34 Rosemount RDO

5.14 Diagnostics

The following diagnostic information is available for the RDO probe:
• Serial number
• Firmware version number
• Date of last user calibration
• Last calibration slope and offset
• Date next calibration is due
• Expiration date for sensing cap (one year from the date the sensing cap took its first
measurement, for PN R0084230 only)
• For replacement cap, PN R0084230X, there is no expiration date (expected life is
two years)
• Sensing cap serial number
The following diagnostic information is available for analyzer Probe C, also called ConTROLL PRO:
• Serial number
• Firmware version number
• Hardware version number
• Power source
Programming the analyzer
Procedure
1. Select Menu, then Diagnostics.
2. Select the desired probe (A or B). For analyzer diagnostics, select Probe C.
3. Use the arrow keys to scroll through the diagnostics.
4. To read the last calibration slope and offset, scroll to Last calibration and select it.
The slope should be between 0.80 and 1.20, and the offset should be between -0.2 and +0.2.
Manual 35
Programming the analyzer
36 Rosemount RDO
6 Calibration

6.1 Calibration options

There are three ways to calibrate the RDO probe.
• Saturation: Both a two-point (100% and 0% saturation) and one-point (100%
saturation) calibration are available. 100% saturation refers to water completely saturated with atmospheric oxygen. 0% refers to water containing no dissolved oxygen.
The solubility of atmospheric oxygen in water depends on the barometric pressure, temperature, and humidity. If these are known, the concentration of oxygen in air­saturated water can be readily calculated, making it a useful calibration standard. In practice, however, air-saturated water is almost never used. Air is used instead. Air works because, according to Henry's Law, the concentration of oxygen in air­saturated water (expressed in mg/L) is in equilibrium with the partial pressure of oxygen in the air used to saturate the water. Therefore, whether the probe is in air or in air-saturated water, the fluorescence quenching will be exactly the same.

Calibration

During calibration at 100% saturation, the micro-processor uses the temperature measured by the probe and the barometric pressure measured by the analyzer to calculate the equilibrium solubility of oxygen in water. Because the calibration assumes the air is completely saturated with water, the calibration must be done with the probe in air having 100% humidity.
Calibrating at 0% saturation requires water containing no dissolved oxygen. A good 0% saturation standard is water containing about 5% sodium sulfite (Na2SO3). Add about one teaspoonful of sodium sulfite crystals to a cup of water.
• Concentration: If the probe is installed in a waste-water aeration basin, it is often
inconvenient to remove it for saturation calibration. In this case, concentration calibration, in which the probe is calibrated against a referee instrument, is more suitable.
• Default: Default restores the default calibration.
Although a new probe can be used as received from the factory, Emerson recommends that you do a two-point saturation calibration when the probe is first placed in service.
Manual 37
Calibration

6.2 One-point calibration (100% saturation)

Complete the following steps to do a one-point calibration.
1. Remove storage cap on top of calibration chamber and replace it with the
calibration cap (cap with the vent hole).
Calibration and storage capsFigure 6-1:
2. Fill the calibration chamber to the lower fill line with approximately 10 mL water.
The water temperature should be as close to the sample temperature as possible.
Fill the calibration chamber to the lower line with water.Figure 6-2:
3. Remove the sensor from the process liquid. If the sensor is fouled or dirty, clean it by
following the procedure in Section 7.2.2. Gently dry the probe and sensor with a soft cloth, making sure there is no water on the body of the sensor or on the sensing foil.
Important
The sensing foil must remain dry during 100% saturation calibration.
38 Rosemount RDO
Calibration
4. Place the probe in the calibration chamber keeping the sensing foil about 1 in. (25
mm) above the surface of the water.
5. Allow at least five minutes for the temperature to stabilize before starting the
calibration.
Keeping the sensor in the shade will help reduce drift caused by the sun's heat. Do not leave the calibration chamber for more than 30 minutes, lest condensation form on the surface of the foil, leading to false low readings after calibration. If condensation does occur, remove the probe and dry the foil. Return the sensor to the calibration chamber and continue.
6. Once readings are stable, start the calibration. Select Menu > Calibrate > RDO PRO >
Saturation > One-point cal.
The calibration begins immediately. The Calibration Beginning screen shown in
Figure 6-3 appears.
Figure 6-3:
Note the Calibration Beginning icon next to the mg/L reading. As the reading stabilizes, the bar in the icon shrinks. When the word Nominal appears, the
stabilization is almost complete, and the calibration can be selected at this point by selecting Nominal. However, for best results, wait until Stable appears.
7.
Select Stable to accept the calibration. To end and return to the previous calibration, select Cancel.
The figure shows the screens that appear as the calibration progresses.

6.3 Two-point calibration (100% and 0% saturation)

Complete the following steps to perform a two-point calibration on your RDO analyzer.
1.
Set up the calibration chamber and probe as described in Section 6.2, steps 1 through 5.
Manual 39
Calibration
Important
Do the 100% calibration step first.
2. Once readings are stable, start the calibration. Select Menu > Calibrate > RDO PRO >
Saturation > Two-point cal.
The calibration begins immediately. The Calibration Beginning screen shown in
Figure 6-3 appears, and the other two screens appear as the reading stabilizes. Wait
until the word Stable appears.
3. Select Stable to accept the calibraiton and proceed to the 0% saturation step. To
end and return to the previous calibration, select Cancel.
The 0% saturation step starts automatically.
4. Remove the probe and fill the calibration chamber to the upper fill line with
approximately 60 mL of fresh sodium sulfite solution (see Figure 6-4).
Figure 6-4:
Fill the Calibration Chamber to the Upper line with Fresh Sodium Sulfite Solution.
A teaspoonful of sodium sulfite in a cup of water is adequate.
Place the probe in the sodium sulfite solution. Be sure the thermistor thermowell
5.
(the small metallic disc about 1/8 inch [3 mm] above the nose cone) is completely submerged. Leave at least 1/2 inch (12 mm) between the surface of the foil and the bottom of the chamber. Do not allow the sensing foil to rest on the bottom of the calibration chamber. Allow at least five minutes for readings to stabilize.
The Calibration Beginning screen shown in Figure 6-5 appears.
40 Rosemount RDO
Calibration
Figure 6-5:
Note the Calibration Beginning icon next to the mg/L reading. As the reading stabilizes, the bar in the icon shrinks. When the word Nominal appears, the
stabilization is almost complete. However, for best results, wait until Stable appears.
6.
Select Stable to accept the calibration. To end and return to the previous calibration, select Cancel.
The calibration report screen appears. The slope will be between 0.8 and 1.2, and the offset will be between -0.2 and +0.2.
The Figure Shows the Screens that Appear as the Calibration Progresses.
7. Press OK.
8. Remove the probe from the calibration chamber. Rinse it and return it to the process
liquid.

6.4 Concentration calibration

Complete the following steps to do a concentration calibration of your RDO analyzer.
1.
Calibrate the referree instrument following the manufacturer's instructions.
2. Immerse the referree sensor in the process liquid as close to the RDO probe as
possible.
3. Allow adequate time for the referree sensor to come to equilibrium with the process
liquid.
4. Once readings are stable, start the calibration. Select Menu > Calibrate > RDO >
Concentration.
5. Enter the value from the referree instrument as the Standard Value shown on
the display. Press Enter.
Manual 41
Calibration
42 Rosemount RDO
7 Maintenance

7.1 Analyzer

7.1.1 Cleaning the analyzer enclosure

Clean the analyzer case and front panel by wiping with a clean, soft cloth dampened with water only.
CAUTION!
EQUIPMENT DAMAGE
Do not use organic solvents.

7.1.2 Replacing the dessicant

Maintenance

Periodically inspect the dessicant bag in the analyzer enclosure. Replace the dessicant (PN R0087630) when the indicator beads turn from blue to pink.

7.1.3 Replacing the clock battery

The clock battery is located at the bottom of the back of the enclosure cover. To replace the battery:
1. Disconnect AC power to the instrument.
2. Remove the enclosure cover.
3. Remove the clock battery and replace it with a 3 V MnO2-Li battery, CR2032 or
equivalent.
4. Dispose of spent battery properly.
5. Replace the cover.
6. Restore AC power.
Manual 43
Maintenance

7.2 RDO probe

7.2.1 Cleaning the sensing cap

Complete the following steps to clean the sensing cap.
Important
Leave the sensing cap and cone attached to the probe body. Do not remove the sensing cap to clean it.
Procedure
1. Rinse the cap with clean water from a squirt bottle.
2. If biofouling is present, gently wipe the cap with a soft-bristeled brush or soft cloth.
If oil or grease is present, wash with a gentle detergent.
3. If extensive fouling or mineral build-up is present, soak the cap of the sensor - do not
remove the sensing cap - in vinegar for 15 minutes; then soak in deionized water for 15 minutes.
CAUTION!
EQUIPMENT DAMAGE
Do not use organic solvents.
4. After cleaning the sensor, check the calibration in the air. Perform a one or two-
point saturation calibration if necessary.

7.2.2 Cleaning the probe body

Complete the following steps to clean the RDO probe body. Leave the sensing cap and nose cone attached to the probe body while cleaning it. Do not remove the sensing cap.
Procedure
1. Gently scrub the probe body with a soft-bristled brush of a nylon dish scrubber. Use
a mild detergent to remove oil or grease.
2. Soak in vinegar followed by deionized water to remove mineral deposits or extensive
fouling.
See step 4 in Section 7.2.1.

7.2.3 Cleaning the optical window

Clean the optical window only when the sensing cap is replaced. See Section 7.2.1.
44 Rosemount RDO

7.2.4 Replacing the sensing cap

The replacement sensing cap kit (PN R0084230X and PN R084230) contains a sensing cap, two O-rings, O-ring lubricant, and a lens wipe.
Note
Keep the cap in its sealed packaging until you are ready to install it. Install promptly. Avoid allowing moisture, including humidity, inside the cap.
Procedure
1. Remove the sensor from the process liquid. Rinse with water and dry the probe body
and nose cone.
2. Unscrew the nose cone.
3. Pull the sensing cap straight off the probe body.
Do not twist.
4. Remove and discard the existing O-rings.
5. Remove any moisture in the O-ring grooves.
Maintenance
Be careful not to touch the lens.
6. Use your finger to apply a thin layer of lubricant around the O-ring grooves.
CAUTION!
EQUIPMENT DAMAGE
Be careful not to get grease on the lens or on the sensor pins.
7. Slide the two O-rings into grooves. Check that the O-rings are not twisted or
pinched. Apply a thin layer of lubricant over the O-rings and grooves.
CAUTION!
EQUIPMENT DAMAGE
Be careful not to get grease on the lens or on the sensor pins.
8. Clean the lens with the wipe provided in the kit and allow it to dry thoroughly.
Inspect the lens for scratches or dirt.
9. Remove the new sensing cap from its sealed packaging. Align the arrow on the cap
with the index mark on the probe and firmly press the cap onto the probe, without twisting, until it seals. Replace the nose cone.
10. Perform a one or two-point saturation calibration.
Manual 45
Maintenance

7.2.5 Storing the probe

Store the probe in the calibration chamber using the storage cap (cap without notch). Place a few drops of water in the chamber before inserting the probe.

7.3 Replacement parts

Part number Description
R0094030 RDO analyzer, AC power, no data logging
R0086460X RDO Pro-X sensor with 32 ft (10 m) of integral cable
R0082490X RDO Pro-X sensor with twist lock connector
R0087560 RDO analyzer pipe and wall mounting kit
R00CBL10 Twist lock connector cable, 32 ft (10 m)
R00CBL20 Twist lock connector cable, 64 ft (20 m)
R00CBL30 Twist lock connector cable, 96 ft (30 m)
R0084230 RDO sensor cap replacement kit
R0080810 RDO O-ring replacement kit
R0080820 RDO replacement nose cone kit
R0088890 RDO replacement calibration cup
R00087630 RDO replacement dessicant bag for analyzer
R0084230X RDO Pro-X sensor cap replacement kit
46 Rosemount RDO
8 Specifications

8.1 RDO probe

Specifications

Wetted materials Delrin
Dimensions Length: 8.0 in. (203 mm); Diameter: 1.9 in. (47 mm)
Rating IP-67 with cap off; IP-68 with cap installed
Process connection 1-1/4 in. FNPT
Integral cable length 32 ft (10 m)
Maximum cable length (quick disconnect cable only) 4000 ft (1219 m)
Pressure Up to 314 psig (2060 kPa abs)
Temperature 0 to 50 °C (32 to 122 °F)
Range 0 to 20 ppm (mg/L) or 0 to 200% saturation
Accuracy ±0.1 ppm between 0 and 8 ppm, ±0.2 ppm between 8 and
Resolution 0.01 ppm (mg/L)
Digital output Modbus/RS485
Response time 30 sec to 90% of final value; 37 sec to 95% of final value (at
Operating life of sensing cap 2 years from first reading
Safety directive 73/23/EEC
EU directives 2004/108/EC for electro-magnetic compatibility (EMC)
Immunity EN 61000-6-2, electromagnetic compatibility (EMC) part
(1)
, ABS, Viton
poly(methyl, methacrylate) blend
20 ppm
25 °C [77 °F])
and 72/23/EEC for Safety
(2)
, titanium, polycarbonate/
6-2
Emissions Class A requirements of CISPR 11: 2004
(1) Delrin is a registered trademark of DuPoint DeNemours, LLC. (2)
Viton is a registered trademark of DuPoint Dow Elastomers, LLC.

8.2 RDO analyzer

Enclosure Polycarbonate, rated NEMA 4X, IP67
Dimensions (W x H x D) 6.3 x 6.3 x 3.6 in. (16 x 16 x 9.0 cm)
Display Liquid crystal; character height: 0.4 in. (6 mm)
Mounting Suitable for pipe or wall mounting
Manual 47
Specifications
Conduit openings Six; PG 13.5 (1/2 in.); three gland fittings and five plugs
ship with the analyzer
Ambient temperature and humidity -20 to 70 °C (-4 to 158 °F); 95% relative humidity (non-con-
densing)
Power 100 to 240 Vac, approximately 0.15 A, 50 - 60 Hz
Analog outputs Two fully scalable 4-20 mA outputs, each loop-powered
(9-36 Vdc)
Digital output Modbus/RS485
Relays Two low voltage relays, <50 Vac or Vdc, maximum current
2 A (resistive or inductive) two high voltage relays, 264 Vac max, maximum current 5 A (resistive or inductive)
Barometric pressure range 8.86 to 29.53 in Hg (300 to 1000 mbar)
Barometric presssure accuracy ±0.09 in Hg (±3 mbar)
EU directive 2004/108/EC for electromagnetic compatibility (EMC)P
Immunity EN61000-6-2, electromagnetic compatibility (EMC) part
6-2
Emissions EN61000-6-4 electromagnetic compatibility; includes IEC/
EN61000-3-2 and IEC/EN61000-3-3 where applicable
Safety UL 61010-1 and CAN/CSA C22.2 #61010-1
48 Rosemount RDO
Specifications
Manual 49
Specifications
50 Rosemount RDO
Specifications
Manual 51
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