00825-0100-3140, Rev AA
Rosemount™ 140/141/142
Contacting Conductivity Sensors
Quick Start Guide
May 2020
Quick Start Guide May 2020
Essential instructions
Read this page before proceeding!
Emerson designs, manufactures, and tests its products to meet many national and international
standards. Because these instruments are sophisticated technical products, you must properly install,
use, and maintain them to ensure they continue to operate within their normal specifications. You
must adhere to the following instructions and integrate them into your safety program when
installing, using, and maintaining Emerson's Rosemount products. Failure to follow the proper
instructions may cause any one of the following situations to occur: loss of life, personal injury,
property damage, damage to this instrument, and warranty invalidation.
• Read all instructions prior to installing, operating, and servicing the product.
• If you do not understand any of the instructions, contact your Emerson representative for
clarification.
• Follow all warnings, cautions, and instructions marked on and supplied with the product.
• Inform and educate your personnel in the proper installation, operation, and maintenance of the
product.
• Install equipment as specified in the installation instructions of the appropriate Reference Manual
and per applicable local and national codes. Connect all products to the proper electrical and
pressure sources.
• To ensure proper performance, use qualified personnel to install, operate, update, program, and
maintain the product.
• When replacement parts are required, ensure that qualified people use replacement parts
specified by Emerson. Unauthorized parts and procedures can affect the product's performance,
place the safe operation of your process at risk, and VOID YOUR WARRANTY. Look-alike
substitutions may result in fire, electrical hazards, or improper operation.
• Ensure that all equipment doors are closed and protective covers are in place, except when
maintenance is being performed by qualified people, to prevent electrical shock and personal
injury.
Note
The information contained in this document is subject to change without notice.
CAUTION
Sensor/Process Application Compatibility
The wetted sensor materials may not be compatible with process composition and operating
conditions. Application compatibility is entirely the responsibility of the user.
CAUTION
Before removing the sensor, be absolutely certain the process pressure is reduced to 0 psig and the
process temperature is at safe level.
2 Emerson.com/Rosemount
May 2020 Quick Start Guide
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
Specifications...............................................................................................................................5
Installation................................................................................................................................... 9
Wire Rosemount 140, 141, and 142 sensors...............................................................................14
Retract and insert the Rosemount 141 sensor............................................................................ 18
Remove and reinstall the Rosemount 142 sensor....................................................................... 22
Calibrate and maintain............................................................................................................... 23
Troubleshoot............................................................................................................................. 30
Accessories................................................................................................................................ 34
Quick Start Guide 3
Quick Start Guide May 2020
4 Emerson.com/Rosemount
May 2020 Quick Start Guide
1 Specifications
Table 1-1: Rosemount 140 Contacting Conductivity Sensor Specifications
Cell constants
0.1 and 1.0/cm (nominal, to within ±5%)
Wetted materials
Electrodes 316 stainless steel
Body 316 stainless steel
Insulator Polyetheretherketone (PEEK)
O-rings Viton
Temperature range
Standard 32 to 302 °F (0 to 150 °C)
High temperature 32 to 392 °F (0 to 200 °C)
Pressure
100 psig (791 kPa) maximum
Vacuum
At 1.6-in. Hg (5.2 kPa), air leakage is less than 0.005 SCFM (0.00013 m3/min.)
Junction box
Cast aluminum
Process connection
1-in. (25.4 mm) male pipe thread (MPT) through 1-in. (25.4 mm) full port ball valve
(retractable)
Weight/shipping weight
5 lb./6 lb. (2.5 kg/3.0 kg)
(1)
®
(1) Weights rounded up to nearest whole lb. or 0.5 kg.
Table 1-2: Rosemount 141 Contacting Conductivity Sensor Specifications
Cell constants
0.2 and 1.0/cm (nominal, to within ±5%)
Wetted materials
Electrodes 316 stainless steel
Body 316 stainless steel
Quick Start Guide 5
Quick Start Guide May 2020
Table 1-2: Rosemount 141 Contacting Conductivity Sensor Specifications
(continued)
Insulator PEEK
O-rings Viton
Temperature and pressure
See Figure 1-1.
Vacuum
At 1.6-in. Hg (5.2 kPa), air leakage is less than 0.005 SCFM (0.00014 m3/min.)
Junction box
Cast aluminum
Process connection
¾-in. (19.1 mm) MPT
Weight/shipping weight
2 lb./3 lb. (1.0 kg/1.5 kg)
(1)
Weights rounded up to nearest whole lb. or 0.5 kg.
(1)
Table 1-3: Rosemount 142 Contacting Conductivity Sensor Specifications
Wetted materials
Electrodes 316 stainless steel
Body 316 stainless steel
Insulator PEEK (high temperature option)
PCTFE (low temperature option)
O-rings Viton
Temperature and pressure
See Figure 1-1.
Vacuum
At 1.6-in. Hg (5.2 kPa), air leakage is less than 0.005 SCFM (0.00014 m3/min.)
Junction box
Cast aluminum
Process connection
¾-in. (25.4 mm) MPT
6 Emerson.com/Rosemount
May 2020 Quick Start Guide
Table 1-3: Rosemount 142 Contacting Conductivity Sensor Specifications
(continued)
Weight/shipping weight
2 lb./3 lb. (1.0 kg/1.5 kg)
(1) Weights rounded up to nearest whole lb. or 0.5 kg.
(1)
Figure 1-1: Rosemount 141 and 142 Sensor Pressure/Temperature
Graphs
A. Standard
B. High temperature
C. Saturated steam
D. Standard
E. High temperature
F. Saturated steam
Table 1-4: Specifications for PN 23724-00 Ball Valve Kit
Wetted materials
316 stainless steel except PTFE seat and seals in ball valve
Quick Start Guide 7
Quick Start Guide May 2020
Figure 1-2: Performance Specifications: Contacting Conductivity Recommended Range
8 Emerson.com/Rosemount
May 2020 Quick Start Guide
2 Installation
2.1 Unpack and inspect
Procedure
1. Inspect the outside of the carton for any damage.
2. If damage is detected, contact the carrier immediately.
3. Inspect the hardware.
4. Make sure all the items in the packing list are present and in good
condition.
5. Notify the factory if any part is missing.
2.2 Install sensor
Keep ¼ in. (6 mm) clearance between electrodes and piping. The electrodes
must be completely submerged in the process liquid, i.e., to the level of the
threaded connection.
See Figure 2-1 for recommended orientation and installation.
If the sensor is installed in a side stream with the sample draining to open
atmosphere, bubbles may accumulate on the electrodes. Trapped bubbles
will cause errors. As bubbles accumulate, the conductivity reading drops. To
control bubble formation, apply a small amount of back pressure to the
drain.
Figure 2-1: Sensor Orientation
A. Trapped air
B. Trapped sludge
Quick Start Guide 9
Quick Start Guide May 2020
2.3 Install with ball valve kit (PN 23724-00)
If the ball valve assembly is already in place and the process line is
pressurized, refer to Insert the sensor.
Procedure
1. Install the sensor in either a 1-in. (25.4 mm) national pipe thread
(NPT) weldalet or in a 1-in. (25.4 mm) pipe tee.
2. Remove the plastic shipping cap from the sensor.
10 Emerson.com/Rosemount
May 2020 Quick Start Guide
3. Screw the 1-in. (25.4 mm) hex nipple into the weldalet or pipe tee.
Use pipe tape on the threads.
See Figure 2-2.
Figure 2-2: Install with Ball Valve Kit (PN 23724-00)
A. Radius of ball valve kit
B. Process piping
C. Ball valve
D. Sensor compression fitting
E. Sensor
F. 1-in. (25.4 mm) NPT hex nipple
G. Weldalet
H. Put wrench A here and turn.
I. Put wrench B here.
J. Side view
K. Ball valve
L.
CAUTION
Process O-ring must be in place and is critical.
Replace if worn or dirty.
M. Wrench B
N. Top view
O. Wrench A
4. Position the sensor for easy access to the ball valve handle, sensor
compression fitting nut, and junction box.
5. Make sure the ball valve is in the fully open position.
Quick Start Guide 11
Loading...