Product Data SheetAugust 2014
00813-0100-4926, Rev BA
Rosemount Bearing Temperature Sensors (Type WEX 926)
Non-intrusive measurement on bearing applications
Oil sealing for increased process safety
Thermal expansion compensation
Flexible installation with adjustable process connections
Rosemount Bearing Temperature Sensors August 2014
Success with Bearing Temperature Measurement
The Rosemount WEX926 Bearing Temperature Sensor offers a reliable solution for your Bearing temperature measurement needs. This high quality product delivers superior performance and can be used in a variety of bearing temperature applications.
OverviewThe Rosemount Bearing Thermocouple and RTD temperature sensor has been specifically designed for use in embedded bearings, critical to machine performance in industrial rotating equipment, for a reliable indication of bearing wear and oil film breakdown through continuous monitoring of temperature. The oil sealing feature allows for usage of this sensor in lubricated and harsh environments beneath the Babbitt layer of the bearing shoe. Rising temperatures indicate the breakdown of the lubricated oil film due to changes in the friction. A quick identification of early bearing failure warning is crucial for predicting machine shutdowns and maintenance to prevent serious damage to machinery.
Accurate and reliable measurementThe Rosemount Bearing Thermocouple and RTD temperature sensor ensures improved response time and constant contact of the sensing element with the bearing Babbitt layer by using a spring loaded design. The spring loaded design also compensates for thermal expansion of the bearing layer.
Process safetyTo allow a secure and safe temperature measurement in the harsh and oily bearing environment, the Rosemount Bearing Thermocouple and RTD temperature sensor offers oil sealing features and safety approvals. The specific design prevents oil leakage through the sensor itself as well as through the holding tube.
Complete assembliesEmerson makes it easy for you to order and install complete assemblies to accomplish your measurement needs. The Rosemount Bearing Temperature Assembly is available with an in-head HART® or FOUNDATION™ fieldbus transmitter (Rosemount 248 or Rosemount 644).
Temperature solutionsRosemount 644 Temperature TransmitterHead mount styles available with HART or FOUNDATION fieldbus protocol. Rail mount style available for HART protocol.
Rosemount 848T Temperature TransmitterEight input transmitter available with FOUNDATION fieldbus protocol.
Rosemount 848T Wireless Temperature TransmitterThe 848T Wireless temperature transmitter integrates four temperature measurements into a self-organizing network. It provides a reliable and cost effective solution for high density applications.
Rosemount 248 Temperature TransmitterHead mount (DIN B) and rail mount style with HART protocol and complete temperature assembly.
Rosemount 648 Wireless Temperature Transmitter
The Rosemount 648 integrates temperature measurement into a self-organizing wireless network, providing best in class security, reliability, SmartPower™ capabilities, and network scalability, optimizing plant performance while minimizingmaintenance.
Rosemount 3144P Temperature Transmitter
Field mount style HART or FOUNDATION fieldbus protocol. Dual sensor input with advanced diagnostics.
Contents
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Product Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Customer Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
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Rosemount Bearing Temperature SensorsAugust 2014
Product Overview
Product introduction
The Rosemount WEX 926 Bearing Thermocouple and RTD sensor can be used in various different bearing applications. The oil sealing and spring loading makes this sensor a perfect solution for rough environments where the highest performance of the sensor is crucial.
Emerson uses highly linear RTD elements with a very stable resistance versus temperature relationship and are designed to meet the parameters of IEC 751 (DIN EN 60751), incorporating Amendments 1 and 2. Rosemount Bearing Thermocouples conform to IEC 584 (DIN EN 60584). Consult the factory and use the Customer Data Sheet (CDS) provided for Bearing Sensor models and Emerson will provide the sensor that will accommodate the process application.
Model code meaning
Table 1. Model Code Meaning
Code
Type name
WEX926
Process connection
G Thread
Protection tube
Y Metal protection tube
Lead wire termination
I Enclosure
Tube diameter
12 12 mm
Detailed description
RZ Cylindric tapered measuring tip
T Head mounted transmitter
VER Adjustable process connection
Additional options
Additional options are defined by quoting. Consult factory and use the Customer Data Sheet (CDS).
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Rosemount Bearing Temperature Sensors August 2014
Specifications
Material selectionEmerson provides a variety of Rosemount product with various product options and configurations including materials of construction that can be expected to perform well in a wide range of applications. The Rosemount product information presented is intended as a guide for the purchaser to make an appropriate selection for the application. It is the purchaser’s sole responsibility to make a careful analysis of all process parameters (such as all chemical components, temperature, pressure, flow rate, abrasives, contaminants, etc.), when specifying product, materials, options and components for the particular application. Emerson Process Management is not in a position to evaluate or guarantee the compatibility of the process fluid or other process parameters with the product, options, configuration or materials of construction selected.
Table 2 provides a quick reference for the performance and physical aspects of the Rosemount Bearing Thermocouple and RTD temperature sensor assembly.
Table 2. Performance Specifications
Thermocouples RTD
Accuracy
Limits of Error Interchangeability acc. IEC 584 (DIN EN 60584) for thermocouple
In Accordance to IEC 751(DIN EN 60751)Class A: (0.15 + 0.0020 x t)Class B: (0.20 + 0.0050 x t)“t” is the temperature in °C
Class 1
Type E ±1.5 °C
Type J ±1.5 °C
Type K ±1.5 °C
Type N ±1.5 °C
Type T±0.5 °C 0 to 125 °C
±0.004 x t °C 125 to 180 °C
Class 2
Type E ±2.5 °C
Type J ±2.5 °C
Type K ±2.5 °C
Type N ±2.5 °C
Type T ±1.0 °C 0 to 133 °C
±0.0075 x t °C 133 to 180 °C
Ambient Temperature Limits
-50 to 60 °C (-58 to 140 °F)
Temperature Measuring Range
0 to 180 °C (32 to 356 °F)
Ratings max. IP65
Insulation resistance 1000 MΩ at room temperature, test voltage is 500 Vac
Connection CablePTFE, foil, wire mesh, PTFE insulated AWG24 stranded cable, Color coding. See Figure 1 on page 5 for wire configuration
PTFE, foil, wire mesh, PTFE insulated AWG24 nickel plated copper wire. See Figure 1 on page 5 for wire configuration
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Rosemount Bearing Temperature SensorsAugust 2014
Wiring diagrams
Figure 1. WEX926 Bearing Sensor RTD and Thermocouple Lead Wire Configuration
Lead wire configuration RTD
Single element 3-wire Single element 4-wire
Dual element 3-wire Dual element 4-wire
Lead wire configuration thermocouple
Single element Dual element
3 1
4 6
Brown1
White2Yellow4
3
4
1
6
YellowRed
Blue
Black 6
1
34
12
3
45
6
4
5
6
1
2
3 Yellow
White
Brown
Blue
Black
Red
123
4
56 7
8
White1
Brown2
Green3Yellow4
Grey5Rose6Blue7
Red8
31
1(+)
3(-)
1 3
46
4(+)
6(-)
1(+)
3(-)
Table 3. WEX926 Thermocouple Wire Colors
IEC wire color ISA wire color
TypePositive
(+)Negative
(-)Positive
(+)Negative
(-)
E Violet White Violet Red
J Black White White Red
K Green White Yellow Red
N Rose White Orange Red
T Brown White Blue Red
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Rosemount Bearing Temperature Sensors August 2014
Dimensional Drawings
Figure 2. Sensor Assembly Example
Figure 3. Connection head dimensional drawing
Nominal Length (NL)
40
12
With LCD display cover With standard cover
A. Head ConnectionB. LCD Display
104
78
128
B
A
104
100
78
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Rosemount Bearing Temperature SensorsAugust 2014
Product Certifications
ATEX Flameproof
Certificate Number KEMA 99ATEX8715 XATEX Marking II 2 G Ex d IIC T6
1180
Special Condition for Safe Use (X):
1. For information on the dimensions or the flameproof joints the manufacturer should be contacted.
Temperature codes
T6 (-50 < Tamb < 65 °C)
The ATEX Flameproof approval is dependent on the Rosemount Integral Sensor Connection Head assembled with an RTD or thermocouple temperature sensor drawing, see Figure 3. The captive flame arrestor insert must be fully engaged into the connection head for compliance with this approval.
IECEx Intrinsically Safety
Certificate number IECEX IBE 09.0015XMarking: Ex ia IIC T6
Special Conditions for Safe Use (X):
1. The installation and the operation of the temperature sensors have to be carried out according to the requirements of the operating instructions
2. The maximum permissible temperatures of the medium are dependent on the electric output of the supply in case of failure.
3. With maintenance of the collar tube distances have to be guaranteed the maximum permissible ambient temperatures.
Electrical and thermal data
Ambient temperature (at connector) -40 °C to +60 °C-51 °C to +60 °C (optional)Measuring temperature (point of the sensor) -50 °C to +450 °C (peak 550 °C)Maximum input voltage Ui < 30 Voptional Ui < 60 V (exclusively for the mineralized resistance thermometer series 0065 in design with one measuring circuit and an outer diameter of 6 mm)Maximum input power Pi < 750 mWMaximum internal capacitance max. 160 pF/mMaximum internal inductance max. 10 ì H + 1 ì H/m
IECEx Increased Safety
Certificate number IECEx IBE 09.0013XMarking: Ex e II T6
Special Conditions for Safe Use (X):
1. For the assembly and the operation of temperature sensor the requirements of the operating instruction have to be observed.
2. The application of the temperature sensor requires a protection tube.
3. The electrical connection has to be in an enclosure which is certified in a standardized type of protection.
Electrical and thermal data
Temperature measuring range 0 °C to +180 °CAmbient temperature at the connection head -40 °C to +60 °CInput voltage max. 30 V DCMeasuring current 1x respectively 2x ≤ 1 mAFault current max. 100 mA (limited by a fuse)Power ≤10 mWMeasuring elements Resistance thermometer Pt100 acc. IEC 60751 class A or B in 3- respectively 4-conductor circuit or alternatively Thermo couples type K, J or T acc. to IEC 60584-1 class 1 or 2.
IECEx Flameproof
Certificate number IECEx KEM 09.0015X
Special Condition for Safe Use (X):
1. For information on the dimensions of the flameproof joints the manufacturer shall be contacted.
Table 4. Entity parameters
Sensor Transmitter
Umax = 5 V Umax = 55 Vdc
Imax = 2.0 mA Imax = 40 mA
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Rosemount Bearing Temperature Sensors August 2014
Electrical and thermal data
Electrical apparatus for potentially explosive gas atmospheres: -40 to +65 °CElectrical apparatus for use in the presence of combustible dust: -40 to +85 °CPRTE and TC sensor: Maximum input voltage: 5 V, Maximum input current: 2,0 mA Temperature transmitter: Maximum input voltage: 55 Vdc, Maximum input current: 40 mA
Material overview
Process and connection head connections
Figure 4. Compression Fitting G1/2
Figure 5. Compression Fitting 1/2 NPT
Figure 6. Screw Bushing
Table 5. Component Material Overview
Part Material
Spring ASTM301/1.4310
Mounting tube ASTM316Ti/1.4571
Compression fitting ASTM316Ti/1.4571
Screw bushing ASTM303/1.4305
G 1 /2
SW 2
4
15
55
SW 2
7
1 /2 N
PT
SW24
20
65
M24
x 1
.5
SW24
20
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Rosemount Bearing Temperature SensorsAugust 2014
Customer Data Sheet
BOLD = Required Value Select only one of the items provided★= Default One or more of the listed items can be selected
Customer informationCustomer: ________________________________________________________ Name: ___________________________________________
Phone No:_________________________________________________________Fax No./Email: ______________________________________________________
P.O./Reference No.: _________________________________________________P.O. Line Item: ______________________________________________________
Quote No._________________________________________________________Model No.:_______________________________________________
Customer Signoff: _____________________________________________________________________________________________________________________
Bearing sensor information
Device Tag Name: __________________________________________________________
Process information
Temperature Range: __________________________________________
Process Pressure: __________________________________________
Process Medium: __________________________________________
Application: __________________________________________
Sensor base model WEX926-GYI 12
Hazardous Location Certifications:
Ex d ATEX Flameproof Approval GOST (not yet available)
KOSHA IECEx i
IECEx e IECEx d
NONE
Sensor Type: (select only one)
Thermocouple Type J RTD, single element 4-wire
Thermocouple Type K RTD, single element 3-wire
Thermocouple Type T RTD, dual element 3-wire
Thermocouple Type E RTD, dual element 4-wire
Thermocouple Type N
Other: ___________________
Thermocouple Wire Code (select only if sensor type thermocouple is required)
Wire Color per IEC 60584-2
Wire Color per ISA MC96.1
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Rosemount Bearing Temperature Sensors August 2014
Sensor Class/Configuration: (select only one)
Class 1 (TC only) Class B (RTD only)
Class 2 (TC only) Class A (RTD only)
Connection head Material and Form (select only one)
Rosemount aluminum Rosemount aluminum with LCD display cover
Rosemount stainless steel Rosemount stainless steel with LCD display cover
Connection Head Conduit/Cable Entry (select only one)
M20 x 1,5
1/2-in. NPT
Sensor base model WEX926-GYI 12
Head Connection (select only one)
M24x1,5 G1/2
1/2-in. NPT
Process Connection: (select only one)
1/2-in. NPT
G1/2
Nominal Length:
NL: ______________________ mm
Sensor base model WEX926-GYI 12
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Rosemount Bearing Temperature SensorsAugust 2014
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Rosemount Bearing Temperature Sensors00813-0100-4926 Rev BA
Product Data SheetAugust 2014
Emerson Process ManagementRosemount Inc.8200 Market BoulevardChanhassen, MN 55317 USAT (U.S.) 1-800-999-9307T (International) (952) 906-8888F (952) 906 8889www.rosemount.com
Emerson Process Management Blegistrasse 23P.O. Box 1046CH 6341 BaarSwitzerlandTel +41 (0) 41 768 6111Fax +41 (0) 41 768 6300
Emerson FZEP.O. Box 17033Jebel Ali Free ZoneDubai UAETel +971 4 811 8100Fax +971 4 886 5465
Emerson Process Management Asia Pacific Pte Ltd1 Pandan CrescentSingapore 128461Tel +65 6777 8211Fax +65 6777 0947Service Support Hotline : +65 6770 8711Email: [email protected]
Emerson Process Management Latin America1300 Concord Terrace, Suite 400Sunrise, Florida 33323 USATel + 1 954 846 5030
Standard Terms and Conditions of Sale can be found at www.rosemount.com\terms_of_saleThe Emerson logo is a trade mark and service mark of Emerson Electric Co.SmartPower, Rosemount, and the Rosemount logotype are registered trademarks of Rosemount Inc.FOUNDATION fieldbus is a trademark of the Fieldbus Foundation.HART and WirelessHART are registered trademarks of the HART Communication Foundation.All other marks are the property of their respective owners.© 2014 Rosemount Inc. All rights reserved.
00813-0100-4926, Rev BA, 08/14