Quick Start Guide
00825-0100-3228, Rev AA
May 2020
Rosemount™ 228 Toroidal Conductivity
Sensors
Quick Start Guide May 2020
Safety information
WARNING
High pressure and temperature hazard
Failure to reduce the pressure and temperature may cause serious injury to personnel.
Before removing the sensor, reduce the process pressure to 0 psig and cool down the process
temperature.
CAUTION
Equipment damage
The wetted sensor materials may not be compatible with process composition and operating
conditions.
Application compatibility is entirely the operator's responsibility.
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end
users’ equipment. This could be intentional or unintentional and needs to be protected against.
Physical security is an important part of any security program and fundamental to protecting your
system. Restrict physical access by unauthorized personnel to protect end users’ assets. This is true for
all systems used within the facility.
Contents
Overview......................................................................................................................................3
Install........................................................................................................................................... 4
Wire........................................................................................................................................... 23
Calibration................................................................................................................................. 30
Maintaining and troubleshooting............................................................................................... 36
Accessories................................................................................................................................ 37
Return of materials.....................................................................................................................39
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1 Overview
1.1 Description
The Rosemount 228 Toroidal Conductivity Sensor uses flow-through
technology to measure conductivity in highly conductive liquids up to 2
S/cm (2,000,000 µS/cm). This sensor works in dirty and corrosive
applications where metal electrode sensors would otherwise fail. A robust
sensor design makes the Rosemount 228 ideal for measuring concentrations
of acid, base, and salt solutions.
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Quick Start Guide May 2020
2 Install
2.1 Unpack and inspect
Procedure
1. Inspect the shipping container(s). If there is damage, contact the
shipper immediately for instructions.
2. If there is no apparent damage, unpack the container(s).
3. Ensure that all items shown on the packing list are present.
If items are missing, contact your local Customer Care representative
4. Save the shipping container and packaging.
They can be used to return the instrument to the factory in case of
damage.
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2.2 Install the sensor
Figure 2-1: Insertion Adapter 23242-02 for use with ¾-in. MNPT
Threaded Process Connection (-21 Option)
A. Cable
B. 1-in. FNPT
C. Adapter ¾-in. FNPT thread
D. 2-135 Viton® O-ring
E. Nut, hex union 2 inch
F. Neck, union fitting
G. 1½-in. MNPT
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Figure 2-2: Insertion Adapter 23242-03 for use with ⅝-in. 11 UNC
Threaded Process Connection (-20 Option)
A. Cable
B. ¾-in. FNPT
C. Adapter ⅝-in.-11 UNC-2B x ¾-in. NPT
D. 2-135 Viton O-ring
E. Nut, hex union 2 inch
F. Neck, union fitting
G. 1½-in. MNPT
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Figure 2-3: Insertion Adapter 2001990 for use with ¾-in. MNPT
Threaded Process Connection (-21 Option)
A. Cable
B. ¾-in. FNPT
C. 1-132 Viton O-ring
D. 2-in. MNPT
Procedure
1. Mount the sensor in the pipe.
2. Keep at least 1 inch (25 mm) between the sensor and pipe wall.
If the clearance is too small, calibrate the sensor in place.
3. Mount the sensor in a vertical pipe run with flow from top to bottom.
If the sensor must be mounted in a horizontal pipe run, orient the
sensor in the 3 o'clock or 9 o'clock position.
4. Ensure the sensor is completely submerged in liquid.
2.3
Install the insertion/retraction assembly
2.3.1 Installation considerations Requirements
Process
connection
Quick Start Guide 7
1½-in. Larger openings may keep the sensor from
inserting far enough into the process liquid.
Quick Start Guide May 2020
Line size
• 2-in. line (requires in-place calibration)
• 3-in. line or larger
Valve
Retraction
1½-in. NPT full port valve (PN 9340065)
2 ft. (0.6 m)
clearance
Excess vibration
Provide mechanical support if excess vibration is
expected.
Flush water
Provide ⅛-in. valves in inlet and outlet flush ports.
Position flush ports so the retraction chamber can be
drained.
Installation specifications
Table 2-1: Sensor Specifications
Specification Description
Wetted materials Body materials either glass-filled PEEK, glass-
Process connection -20: ⅝-in. 11 UNC, -21: ¾-in. MNPT
Cable length 20 ft. (6.1 m)
Maximum cable length 200 ft. (61.0 m)
Weight/shipping weight 2 lb./3 lb. (1.0 kg/1.5 kg)
filled Tefzel, or unfilled Tefzel. Option -20 has
EPDM gasket
Table 2-2: Maximum Operating Temperature and Pressure
Body material
option
-02 (Glass-filled PEEK
[standard
temperature])
-03 (Glass-filled PEEK
[high temperature])
-04 (Glass-filled
Tefzel)
-05 (Unfilled Tefzel) 248 °F (120 °C) 200 psig (1480 kPa) 150 psig (1135 kPa
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Maximum
temperature
248 °F (120 °C) 295 psig (2135 kPa) 220 psig (1618 kPa
392 °F (200 °C) 295 psig (2135 kPa) 220 psig (1618 kPa
248 °F (120 °C) 200 psig (1480 kPa) 150 psig (1135 kPa
Maximum pressure Maximum pressure
(for CRN registration
only)
[abs])
[abs])
[abs])
[abs])
May 2020 Quick Start Guide
Table 2-3: Insertion Adapter Specifications
Specification 23242-02 23242-03 2001990
Sensor
compatibility
Process
connection
Wetted materials 316 stainless
Maximum
temperature
Maximum
pressure
Maximum
pressure (for
CRN registration
only)
Weight/shipping
weight
Option -21 Option -20 Option -21
1½-in. MNPT 1½-in. MNPT 2-in. MNPT
steel, glass-filled
PEEK, and Viton
392 °F (200 °C) 392 °F (200 °C) 100 °F (38 °C) 185 °F (85 °C)
295 psig (2135
kPa [abs])
220 psig (1618
kPa [abs])
3 lb./4 lb. (1.5
kg/2.0 kg)
316 stainless
steel, glass-filled
®
PEEK, and Viton
295 psig (2135
kPa [abs])
220 psig (1618
kPa [abs])
3 lb./4 lb. (1.5
kg/2.0 kg)
CPVC and Viton
100 psig (791
kPa [abs])
N/A
1 lb./2 lb. (0.5 kg/1.0 kg)
45 psig (412 kPa
[abs])
Table 2-4: Retraction Assembly Specifications
Specification Description
Sensor compatibility The retraction assemblies are used with
Wetted materials 315 stainless steel, ethylene polypropylene
Process connection 1½-in. MNPT
Maximum operating condition 392 °F (200 °C), 295 psig (2135 kPa [abs])
Rosemount 228 - [ ]-20-54-62 only
(EP), unfilled PTFE, carbon-filled PTFE
Table 2-5: Maximum Retraction/Insertion Conditions
Condition 23311-00, mechanical
retraction assembly
Maximum temperature 392 °F (200 °C) 266 °F (130 °C)
Maximum pressure 295 psig (2135 kPa [abs]) 35 psig (343 kPa [abs])
Maximum insertion travel 10.5-in. (267 mm) 12.0-in. (305 mm)
Weight/shipping weight 12 lb./15 lb. (5.5 kg/7.0 kg) 9 lb./12 lb. (4.5 kg/5.5 kg)
Quick Start Guide 9
23311-01, manual
retraction assembly
Quick Start Guide May 2020
Table 2-6: Ball Valve Specifications (Sold Separately)
Specification Description
Part number 9340065
Wetted materials 316 stainless steel, PTFE
Process connection 1½-in. FNPT
Weight/shipping
weight
4 lb./5 lb. (2.0 kg/2.5 kg)
Figure 2-4: Ball Valve Pressure and Temperature
Options (manual or mechanical retraction assemblies)
Retract manual retraction assembly
Prerequisites
Ensure the system pressure is less than 35 psig (342 kPa [abs]).
Procedure
1. Push in on the sensor using the top of the junction box. Slowly loosen
the collet nut.
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WARNING
High pressure
Failure to reduce pressure may cause a loose collet nut to disengage
and cause injury to personnel.
Reduce pressure to 0 psig. Do not loosen collet nut until pressure is 0
psig.
2. When the collet nut is loose enough, slowly ease the sensor back so
that it clears the ball valve. Close the valve to the process line.
3. Drain the retraction chamber contents using the ⅛-in. flush ports.
4. Loosen the 3-in. hex union nut. Remove the sensor and tube
assembly.
5. Replace the 3-in. hex nut O-ring. Place the sensor and tube assembly
back in the retraction assembly. Tighten the 3-in. hex union nut.
Verify that the ⅛-in. flush ports are closed.
Note
With the ball valve closed and the retraction chamber ⅛-in. flush
ports open, some residual process fluid may leak from the 3 in. hex
union nut female ACME threads. This leakage is normal and to be
expected.
WARNING
High pressure
Failure to reduce pressure may cause a loose collet nut to disengage
and cause injury to personnel.
Retraction chamber contents may be under pressure. Before opening
the ball valve, make sure that the process pressure is less than 35
psig (342 kPa [abs]).
6. Open the ball valve and check for leaks. Insert the sensor into the
process. Tighten the collet nut.
Retract mechanical retraction assembly
Prerequisites
Ensure the system pressure is less than 295 psig (2135 kPa [abs]) before
retracting the sensor.
Procedure
1. Retract the sensor using a ½-in. (13 mm) socket wrench. When the
sensor clears the ball valve, close the valve.
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WARNING
Retraction chamber contents may be under pressure.
Failure to reduce pressure may cause a loose part to disengage and
cause injury to personnel.
2. Drain the retraction chamber using ⅛-in. flush ports.
3. Loosen the 3-in. hex union nut and remove the retraction stop collar
and orange clamp top. Remove the sensor and tube assembly.
4. Replace the 3-in. hex nut O-ring. Place the sensor and tube assembly
back in the retraction assembly. Replace the retraction stop collar
about ½-in. in front of the clamp. Tighten the clamp screws,
retraction stop collar, and 3-in. hex union nut. Verify that the ⅛-in.
flush ports are closed.
Note
With the ball valve fully closed and the retraction chamber ⅛-in. flush
ports open, some residual process fluid maay leak from the 3 in. hex
union female ACME threads. This leakage is normal and to be
expected.
5. Before opening the ball valve, make sure that the process pressure is
less than 295 psig (3135 kPa [abs]). Open the valve, check for leaks,
and insert the sensor into the process.
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2.3.2 Install a manual retraction assembly
Procedure
1. Loosen the collet nut and retract the sensor tube into the retraction
chamber (see Figure 2-5).
Figure 2-5: Manual Retraction Assembly Dimensional Drawing
A. Junction box with screw cap
B. ¾-in. FNPT
C. Collet nut
D. Collet
E. Nut guard
F. Nut guard spring
G. 3-in. hex union nut
H. 2.531-in.-8 ACME thread
I. 2 ⅝-in. hex retraction chamber
J. ⅛-in. MNPT plug
K. 1½-in. MNPT
Quick Start Guide 13
Quick Start Guide May 2020
L. 316 stainless steel ¾-in. O.D. tube
M. Toroidal sensor model 228-20-62
2. Loosen the union nut and separate the retraction chamber from the
assembly.
3. Install the retraction chamber on the 1½-in. NPT full port valve
mounted on the process line or vessel.
4. Thread the sensor cable through the tube into the junction box.
Screw the sensor into the tube. Hand-tighten the sensor an
additional half turn once the gasket is seated.
5. Connect the sensor and interconnecting cable leads to the terminal
strip in the junction box (see Figure 2-6).
Figure 2-6: Sensor-Mounted Junction Box Wiring
A. Prewired inside junction box
B. Customer connection
C. White
D. Black
E. Clear
F. Green
G. Temperature element
H. Receive
I. Drive
Note
The wiring diagram shown is for the cable PN 23294-00, which has
three RTD (TC) leads. If you are using cable PN 23294-05, which has
four RTD (TC) leads, connect the green, white, and clear wires in the
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RTD bundle as shown in the drawing. Do not disconnect the black
wire. When you reconnect the RTD wires in PN 23294-05 to the
transmitter, make the connections as described in Step 6 (this
section) or Step 3 (Install mechanical retraction assembly).
6. Connect the other end of the cable to the transmitter.
See the wiring diagrams in Figure 3-2, Figure 3-4, and Figure 3-5. For
cable PN 23294-00, follow the wiring for the Rosemount 228-54
sensor. For cable PN 23294-05, follow the wiring for the Rosemount
228-56 sensor with the following exception: Refer to the wire
function diagram for the Rosemount 228-56 option in Figure 3-1 and
identify the RTD wire bundle. Connect the RTD wires to the
transmitter as follows:
• Green - RTD in
• Black - No connection
• Clear - RTD common or RTD return
• White - RTD sense
Wrap the bare end of the black wire to prevent accidental
connections.
7. Insert the sensor and tube assembly into the retraction chamber.
8. Tighten the union nut.
9. Open the ball valve, check for leaks, and manually insert the sensor
into the process.
10. Position the sensor at least ½-in. (13 mm) away from any wall of the
vessel or pipe.
11. Tighten the collet nut.
2.3.3 Install mechanical retraction assembly
Procedure
1. Tighten the sensor cable through the tube into the junction box.
Screw the sensor into the tube. Hand-tighten the sensor an
additional half turn once the gasket is seated (see Figure 2-7).
Quick Start Guide 15
Quick Start Guide May 2020
Figure 2-7: Mechanical Retraction Assembly
A. Junction box with screw cap
B. Cap
C. Retraction stop collar
D. 3-in. hex union nut
E. 2.531-in.-8 ACME thread type
F. 2⅝-in. hex retraction chamber
G. ⅛-in. MNPT plug type
H. 1½-in. MNPT
I. ¾-in. tube 316 stainless steel
J. Travel stop collar "A"
K. Nut housing
L. Travel stop collar "B"
M. Lead screw
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Note
Maximum insertion/retraction and operating conditions: 295 psig
(2036 kPa) and 392 °F (200 °C).
Requires customer supplied 1½-in. FNPT full port ball valve.
Extension cable is ordered separately. Specify length.
2. Terminate the sensor wiring in the junction box (see Figure 2-6 for
wiring details).
3. Connect the other end of the cable to the transmitter.
See the wiring diagrams in Figure 3-2, Figure 3-4, and Figure 3-5. For
cable PN 23294-00, follow the wiring for the 228-54 sensor. For cable
PN 23294-05, follow the wiring for the 228-56 sensor with the
following exception:
Refer to the wire function diagram for the 228-56 option in Figure
3-1 and identify the RTD wire bundle. Connect the RTD wires to the
transmitter as follows:
• Green: RTD in
• Black: No connection
• Clear: RTD common or RTD return
• White: RTD sense
Wrap the bare end of the black wire to prevent accidental
connections.
4. Using a ½-in. (13 mm) socket wrench, retract the sensor into the
retraction chamber.
5. Install the assembly on the 1½-in. FNPT full port ball valve mounted
in the process line or vessel.
6. Tighten the union nut.
7. Open the ball valve and check for leaks.
8. Using a ½-in. (13 mm) socket wrench, insert the sensor into the
process line or vessel.
9. Position the sensor at least ½-in. (13 mm) away from any wall of the
vessel or pipe. Set the travel stop collar A net to the nut housing.
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WARNING
High pressure
Failure to reduce pressure may cause a loose part to disengage and
cause injury to personnel.
Do not loosen cap screws or collar when pressurized.
2.3.4 Replace seals
Procedure
1. Retract the sensor into the retraction chamber and fully close the ball
valve.
2. Drain the retraction chamber contents using the ⅛ in. flush ports.
WARNING
HIGH PRESSURE
Failure to reduce pressure may cause a loose part to disengage and
cause injury to personnel.
Retraction chamber contents may be under pressure. Reduce
pressure to 0 psig before opening the retraction chamber.
3. For mechanical retraction assemblies, mark the location of the nut
housing cap and retraction collar on the sensor tube. Remove both
socket head cup screws from the nut housing and loosent the
retraction stop collar.
4. Remove the 3 in. hex union nut.
5. Withdraw the sensor from the retraction chamber.
6. Open the junction box and disconnect the sensor wires from the
terminal block.
7. Remove the compression fitting just below the junction box and
remove the junction box from the sensor tube.
8. For manual retraction assemblies, pull down the nut guard and
remove the collet nut from the bushing housing.
9. Slide all hardware, including the bushing housing, off the sensor
tube.
10. Remove the retaining ring from the bottom of the bushing housing.
11. Remove the PTFE guard.
12. From the top of the bushing housing, press out the PTFE bushing.
This will also push out the PTFE cup seal.
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May 2020 Quick Start Guide
13. Replace all damaged parts with replacement parts from Figure 2-8 or
Figure 2-9. Replace the sensor tube if the surface is damaged.
A rough or uneven surface will prevent the PTFE cup from sealing.
Quick Start Guide 19
Quick Start Guide May 2020
Figure 2-8: Mechanical Retraction Assembly Replacement Parts
A. Nylon ferrule
B. Socket head cap screw PN 9722512
C. Cap PN 33168-00
D. Retraction stop collar PN 9090111
E. 316 stainless steel tube PN 33121-01
F. PTFE bushing
G. PTFE bushing PN 33181-00
H. Bushing housing
I. PTFE cup seal PN 955504
J. PTFE guard
K. Union nut O-ring EP PN 9550179
L. Retaining ring PN 9560279
M. Travel stop collar PN 9090111 "A"
N. Lead screw
O. Nut housing
P. Travel stop collar PN 9090111 "B"
Q. Junction box
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May 2020 Quick Start Guide
Figure 2-9: Manual Retraction Assembly Replacement Parts
A. Junction box
B. Nylon ferrule
C. 316 stainless steel tube PN 33121-01
D. COA 360 brass collet PN 33131-00
E. Collet nut
F. Nut guard
G. PTFE bushing PN 33180-00
H. PTFE cup seal PN 9555004
I. PTFE guard PN 33182-00
J. 3-in. hex union nut
K. Union nut O-ring, EP PN 9550179
L. Retaining ring PN 9560279
M. Retraction chamber PN 33127-00
14. Rebuild the bushing housing. The open end of the cup seal (spring
visible) faces the process.
Quick Start Guide 21
Quick Start Guide May 2020
15. Carefully slide the bushing housing onto the sensor tube.
CAUTION
Do not damage the PTFE bushing or the PTFE cup seal.
16. For manual retraction assemblies, slide the 3-in. hex union nut, collet
nut with nut guard, junction box compression nut, and plastic
ferrules onto the sensor tube.
17. For mechanical retraction assemblies, slide the 3-in. hex union nut,
retraction stop collar, junction box compression nut, and plastic
ferrules onto the sensor tube.
18. Connect the junction box to the sensor tube and wire the sensor
leads to the appropriate terminals.
19. For mechanical retraction assemblies, lock the retraction stop collar
into position. (see Figure 2-8 or previously marked position for
proper location).
20. Place the union nut O-ring at the bottom of the bushing housing.
Insert the sensor assembly into the retraction chamber and tighten
the 3-in. hex union nut.
21. For mechanical retraction assemblies, install the nut housing cap (see
Figure 2-8 or previously marked position for proper location).
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3 Wire
3.1 Wire the sensor
Keep sensor wiring away from ac conductors and high current demanding
equipment. Do not cut the cable.
NOTICE
For additional wiring information on this product, refer to Emerson.com/
Rosemount-Liquid-Analysis-Wiring.
Figure 3-1: Wire Functions
A. Green: receive
B. Black: receive common
C. White: drive
D. Black: drive common
E. Green: resistance temperature device (RTD) in
F. White: RTD sense
G. Clear: RTD common
H. Clear: shield
I. Black: RTD common
J. Clear shield (high temperature Rosemount 228-56 sensors only)
Quick Start Guide 23
Quick Start Guide May 2020
Figure 3-2: Wiring Diagram Connecting Rosemount 228-54 Sensor to
Rosemount 1056 and 56 Transmitters
A. Clear
B. White
C. Green
D. Black
E. RTD return
F. RTD sense
G. RTD in
H. RTD shield
I. Receive common
J. Receive
K. Receive shield
L. Outer shield
M. Drive shield
N. Drive
O. Drive common
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Figure 3-3: Wiring Diagram Connecting Rosemount 228-56 to
Rosemount 1056 and 56 Transmitters
A. Black
B. White
C. Green
D. Clear
E. RTD return
F. RTD sense
G. RTD in
H. RTD shield
I. Receive common
J. Receive
K. Receive shield
L. Outer shield
M. Drive shield
N. Drive
O. Drive common
P. Clear present in high temperature sensor (option -03) only. Connect to
"Outer shield" terminal
Quick Start Guide 25
Quick Start Guide May 2020
Figure 3-4: Wiring Rosemount 228 to Rosemount 1066 Transmitter
A. Return
B. Sense
C. RTD in
D. Shield
E. Receive B
F. Receive A
G. Receive shield
H. Drive B
I. Drive A
J. Drive shield
K. Green
L. White
M. Clear
N. Black
O. Clear. Clear shield is not connected. It is present in high temperature
(option -03) only
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Figure 3-5: Wiring Diagram for Rosemount 5081 Transmitters
A. Reserved
B. RTD shield
C. RTD common
D. RTD sense
E. RTD in
F. Receive shield
G. Receive common
H. Receive
I. Drive shield
J. Drive common
K. Drive
L. Clear
M. White
N. Green
O. Black
P. Present in high temperature sensor (option -03) only
Quick Start Guide 27
Quick Start Guide May 2020
Figure 3-6: Wiring Sensors through a Remote Junction Box
Table 3-1: Wiring Sensors through a Remote Junction Box for
Rosemount 228 54
Number Remote
junction
box TB1
1 White White N/A Green White
2 Green Green N/A N/A Black
3 Clear Clear Clear N/A Green
4 Green Green White Green Black
5 Black Black Green White Green
6 NC Clear N/A Clear Clear
7 White White Black N/A White
8 Black Black Green N/A N/A
9 NC Clear N/A Black N/A
10 NC NC Black White N/A
11 NC NC White N/A N/A
Remote
junction
box TB2
Rosemount
54C
Rosemount
2081T
Rosemount
1054 and
2054
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May 2020 Quick Start Guide
Table 3-2: Wiring Sensors through a Remote Junction Box Rosemount
228 56
Number Remote
junction box
TB1
1 Clear Clear Clear Green
2 Clear Clear Clear Black
3 Black Black Black Clear
4 White White White Green
5 Green Green Green White
6 Clear Clear Clear Black
7 Black Black Black Clear
8 Green Green Green Clear
9 Clear Clear Clear Black
10 Black Black Black White
11 White White White N/A
12 N/A N/A N/A Clear
Remote
junction box
TB2
Rosemount
3081T, 81T,
54C, and
4081T
Rosemount
2081T
Wire sensors point to point. For wiring at the transmitter end, refer to the
appropriate transmitter wiring diagram. For interconnecting cable
23294-00, use the Rosemount 228-54 wiring diagram. For interconnecting
cable 23294-04 and 23294-05, use the Rosemount 228-56 wiring diagram.
Figure 3-7: Remote Junction Box (PN 23550-00) Dimensions
A. Drill for 10/32 screw
B. Junction box mounting holes pattern
C. ¾-in. FNPT to sensor
D. ¾-in. FNPT to transmitter
Quick Start Guide 29
Quick Start Guide May 2020
4 Calibration
4.1 Sensor calibration
The nominal cell constant of the Rosemount 228 sensor is 2.7/cm. The error
in cell constant is about ±10%, so conductivity readings made using the
nominal cell constant will have an error of at least ±10%. Wall effects (Figure
4-1), will likely make the error greater.
For more detailed information on calibration methods, reference application
data sheet ADS-43-025 available on the Emerson Liquid Analysis website.
Figure 4-1: Measured Conductivity as a Function of Clearance between
Sensor and Walls
A. Measured conductivity
B. Metal pipe
C. Plastic pipe
D. Distance to wall
E. True conductivity
4.2
30 Emerson.com/Rosemount
Calibrate against a standard solution
Calibration against a standard solution requires removing the sensor from
process piping. This calibration method is practical only if wall effects are
absent or if the sensor can be calibrated in a container identical to the
process piping. Ideally, the conductivity of the standard used should be close
to the middle of the range that the sensor will be used in. Generally, toroidal
conductivity sensors have good linearity, and so standards greater than
5000 µS/cm at 77 °F (25 °C) may also be used.
May 2020 Quick Start Guide
Procedure
1. Remove the sensor from the pipe.
2. Fill a container with the standard solution.
If wall effects are absent in the process installation, use a sufficiently
large container for calibration to ensure that wall effects are absent.
To check for wall effects, fill the container with solution and place the
sensor in the center, submerged at least ¾ of the way up the stem.
Note the reading. Then move the sensor small distances from the
center and note the reading in each position. The readings should
not change.
If wall effects are present, be sure the vessel used for calibration has
exactly the same dimensions as the process piping. Also ensure that
the orientation of the sensor with respect to the piping is exactly the
same in the process and calibration vessels (see Figure 4-2).
Figure 4-2: Calibration Installation Orientation
A. Sensor in process piping
B. Flow
C. Blank flange
D. Pipe tee identical to process pipe tee
E. Sensor being calibrated
F. Standard solution
3. Rinse the sensor with water.
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Quick Start Guide May 2020
4. Immerse the rinsed sensor in the standard solution.
Use a good quality calibrated thermometer to measure the
temperature of the standard solution. The thermometer error should
be less than ±1 °C. Allow adequate time for the solution and sensor to
reach thermal equilibrium. If the sensor is being calibrated in an open
beaker, keep the thermometer far enough away from the sensor so it
does not introduce wall effects. If the sensor is being calibrated in a
pipe tee or similar vessel, it is impractical to place the thermometer
in the standard solution. Instead, put the thermometer in a beaker of
water placed next to the callibration vessel. Let both come to thermal
equilibrium with the ambient air before continuing calibration (see
Figure 4-3).
Figure 4-3: Measuring Standard Temperature
A. Standard thermometer
B. Standard solution
C. Pipe tee
Be sure air bubbles are not adhering to the sensor. An air bubble
trapped in the toroid opening has a particularly severe effect on the
reading.
5. Turn off automatic temperature compensation in the transmitter.
This eliminates error in the cell constant.
6. Adjust the transmitter reading to match the conductivity of the
standard.
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4.3 Calibrate against a referee sensor
4.3.1 Calibrate in-process
Prerequisites
If possible, adjust the conductivity of the process liquid so that it is near the
midpoint of the operating range. If this is not possible, adjust the
conductivity so that it is at least 5000 µS/cm.
Turn off automatic temperature compensation in the transmitter. This
eliminates error in the cell constant.
Procedure
1. Connect the process and referee sensors in a series.
Keep tubing runs between the sensors short and adjust the sample
flow to as high a rate as possible. Short tubing runs and high flow
ensure that the temperature of the liquid does not change as it flows
from one sensor to another.
2. Allow the process liquid to flow through both sensors.
Orient the referee sensor so that the air bubbles always have an easy
escape path and cannot get trapped. Tap and hold the flow cell in
different positions to allow bubbles to escape.
Wait for readings to stabilize before starting the calibration.
Quick Start Guide 33
Quick Start Guide May 2020
3. Adjust the process sensor to match the conductivity measured by the
referee instrument (see Figure 4-4).
Figure 4-4: Calibration with a Referee Instrument Example
A. Flow
B. Sensor in process piping
C. Sample valve
D. Referee sensor in flow cell
4.3.2 Calibrate a grab sample
This method is useful when calibration against a standard is impractical or
when in-process calibration is not feasible, because the sample is hot,
34 Emerson.com/Rosemount
May 2020 Quick Start Guide
corrosive, or dirty, making handling the waste stream from the referee
sensor difficult.
Procedure
1. Take a sample of the process liquid.
a) Take the sample from a point as close to the process sensor as
possible.
b) Be sure the sample is representative of what the sensor is
measuring. If possible, adjust the conductivity of the process
liquid so that it is near the midpoint of the operating range.
c) If that is not possible, adjust the conductivity so that it is at
least 5000 µS/cm.
2. Connect the process and referee sensors.
a) Keep temperature compensation with the transmitter turned
on.
b) Confirm that the temperature measurements in both process
and referee instruments are accurate, ideally to within ±0.5
°C.
3. Place the sensors in the grab sample.
Wait until the readings are stable before starting the calibration.
4. Adjust the reading from the process analyzer to match the
conductivity measured by the referee sensor.
Quick Start Guide 35
Quick Start Guide May 2020
5 Maintaining and troubleshooting
5.1 Maintaining the sensor
WARNING
HIGH PRESSURE
Failure to reduce pressure may cause a loose part to disengage and cause
injury to personnel.
Retraction chamber contents may be under pressure. Reduce the pressure
to 0 psig before opening the retraction chamber.
WARNING
TOXIC LIQUIDS
Be sure the sensor has been cleaned of process liquid before handling.
Generally, the only maintenance required is to keep the opening of the
sensor clear of deposits. Cleaning frequency is best determined by
experience.
36 Emerson.com/Rosemount
May 2020 Quick Start Guide
6 Accessories
Part number Description
23550-00 Remote junction box without preamplifier
33081-00 Adapter insert, PEEK, 1 x ¾-in. for 23242-02
23294-00 Unshielded interconnecting cable for Rosemount 1054A,
23294-05 Shielded interconnecting cable with additional shield wire for
23311-00 Mechanical valve insertion assembly (Code 20)
23311-01 Manual valve insertion assembly (Code 20)
2001990 Sub assembly, adapter 2-in. bushing
9550179 O-ring, 2-135, EPR
23242-02 Mounting adapter, 1½-in. insertion, 1-in. x ¾-in.
23242-03 Mounting adapter, 1½-in. insertion (code 20), 1-in. conduit
23277-01 Mounting adapter, Foxboro, PEEK Code 20, ⅝-11 UNC
33075-00 Viton® gasket for option 20
33075-03 Kalrez® gasket for option 20
9200276 Extension cable, unprepped (specify length) per foot
9340065 Ball valve, full port 1½-in. female national pipe thread (FNPT)
1054B, and 2054C. Can also be used with Rosemount 1056,
56, 5081, and 1066-T, but not recommended. Prepped,
specify length, per ft.
-03 option. For use with Rosemount 1056, 1066-T, 56, and
5081T. Prepped, specify length, per ft.
connection
(to 392 °F [120 °C])
Table 6-1: Spare Parts
Part number Description
33080-01 Adapter insert, PEEK (Code 20) for 23242-03
33121-01 Sensor tube, 316 stainless steel, valve insertion
33131-00 Collette, brass, for PN 2311-00 only)
33168-00 Cap (for PN 23311-00 only)
33180-00 Bushing, PTFE® (for PN 23311-01 only)
33181-00 Bushing, PTFE (for PN 23311-00 only)
33182-00 Guard, PTFE
Quick Start Guide 37
Quick Start Guide May 2020
Table 6-1: Spare Parts (continued)
Part number Description
9555004 Cup seal, PTFE
9560279 Retaining ring for Rosemount 228 insertion assembly
38 Emerson.com/Rosemount
May 2020 Quick Start Guide
7 Return of materials
For repair and warranty inquiries, contact Rosemount Customer Care to
obtain a Return Material Authorization (RMA) number.
Note
Drain the sensor and thoroughly rinse it before shipping back to Emerson.
Quick Start Guide 39
GLOBAL HEADQUARTERS
6021 Innovation Blvd.
Shakopee, MN 55379
+1 866 347 3427
+1 952 949 7001
RMTNA.RCCPO@Emerson.com
00825-0100-3228, Rev. AA
Quick Start Guide
May 2020
NORTH AMERICA
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Chanhassen, MN 55317
Toll Free +1 800 999 9307
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Republic of Singapore
+65 6 777 8211
+65 6 777 0947
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2020 Emerson. All rights reserved.
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mark of Emerson Electric Co. Rosemount is a
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