Rosemount 148 Operating Manual
Reference Manual
00809-0100-4148, Rev CA
Rosemount® 148 Temperature Transmitter
April 2014
Reference Manual
NOTICE
00809-0100-4148, Rev CA
Rosemount 148 Temperature
Transmitter
Rosemount 148 Hardware Revision 5
Read this manual before working with the product. For personal and system safety, and for
optimum product performance, make sure to thoroughly understand the contents before
installing, using, or maintaining this product.
The United States has two toll-free assistance numbers and one international number:
Customer Central
1-800-999-9307 (7:00 a.m. to 7:00 p.m. CST)
National Response Center
1-800-654-7768 (24 hours a day)
Equipment service needs
International
1-952-906-8888
The products described in this document are NOT designed for nuclear-qualified
applications.
Using non-nuclear qualified products in applications that require nuclear-qualified
hardware or products may cause inaccurate readings.
For information on nuclear-qualified products, contact an Emerson Process Management
Sales Representative.
v
Reference Manual
00809-0100-4148, Rev CA
vi
Reference Manual
00809-0100-4148, Rev CA
1Contents
2Section 1: Introduction
Table of Contents
April 2014
1.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.1 Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.2 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3.2 Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3.3 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3.4 Environmental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Return of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Product Recycling/Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3Section 2: Installation
2.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.1 Typical European and Asia Pacific installation. . . . . . . . . . . . . . . . . . . . . . . . 10
2.3.2 Typical North and South American installation. . . . . . . . . . . . . . . . . . . . . . .11
2.4 Set the switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.4.1 Failure mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.5 Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.5.1 Sensor connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.6 Power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.6.1 Surges/transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.6.2 Ground the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4Section 3: Configuration
3.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.1.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.2 Rosemount 148 PC Programmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Tab le of C ontents
3.2.1 PC Programmer software installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.2.2 PC Programmer hardware setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.2.3 Configuring with the Rosemount 148 PC Programmer. . . . . . . . . . . . . . . .21
3.2.4 Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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Table of Contents
April 2014
Reference Manual
00809-0100-4148, Rev CA
5Section 4: Operation and Maintenance
4.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
4.1.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
4.2 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4.2.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4.2.2 Diagnostic messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
AAppendix A: Specifications
A.1 Transmitter specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
A.1.1 Functional specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
A.1.2 Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
A.1.3 Performance specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
A.2 Dimensional drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
A.3 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
BAppendix B: Product Certifications
B.1 Approved manufacturing locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
B.2 European directive information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
B.3 Ordinary location certification from FM approvals . . . . . . . . . . . . . . . . . . . . . . . . .37
B.3.1 North America . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
B.3.2 Europe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
B.3.3 International . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
B.3.4 Combinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
B.4 Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
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Table of Contents
Reference Manual
00809-0100-4148, Rev CA
Section 1 Introduction
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3
Return of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5
Product recycling/disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5
1.1 Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that potentially raises safety issues is
indicated by a warning symbol . Please refer to the following safety messages before
performing an operation preceded by this symbol.
Section 1: Introduction
April 2014
1.1.1 Warnings
Failure to follow these installation guidelines could result in death or serious injury:
Make sure only qualified personnel perform the installation
Explosions could result in death or serious injury:
Do not remove the connection head cover in explosive atmospheres when the circuit
is live.
Verify that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.
All connection head covers must be fully engaged to meet explosion-proof
requirements.
Process leaks could result in death or serious injury:
Do not remove the thermowell while in operation.
Install and tighten thermowells and sensors before applying pressure.
Electrical shock could cause death or serious injury:
Use extreme caution when making contact with the leads and terminals.
Introduction
1
Section 1: Introduction
April 2014
1.2 Overview
1.2.1 Manual
This manual is designed to assist in the installation, operation, and maintenance of the
Rosemount 148 Temperature Transmitter.
Section 1: Introduction
Transmitter and Manual Overview
Things to consider
How to return the transmitter
Section 2: Installation
How to mount the transmitter
How to install the transmitter
How to set the switches to ensure proper use
How to wire and power up the transmitter
Reference Manual
00809-0100-4148, Rev CA
Section 3: Configuration
Configuring the transmitter
Section 4: Operation and maintenance
Explanation of hardware maintenance
Appendix A: Specifications
Transmitter and sensor specifications
Dimensional drawings
Ordering information
Appendix B: Product Certifications
Product Certifications/Hazardous Locations Certifications
Installation drawings
1.2.2 Transmitter
Features of the Rosemount 148 include:
Accepts inputs from a wide variety of RTD and thermocouple sensors
Electronics that are completely encapsulated in epoxy and enclosed in a plastic
housing, making the transmitter extremely durable and ensuring long-term reliability.
A compact size and many housing options allow mounting flexibility in the field
Model code option that allows it to be assembled to any sensor, thermowell, and
extension accessory
2
Introduction
Reference Manual
00809-0100-4148, Rev CA
Refer to the following literature for sensors and thermowells that can be assembled to the
Rosemount 148. They include additional connection heads that may not be available in the
Rosemount 148 model structure.
Temperature Sensors and Accessories (English) Product Data Sheet (Document
Number 00813-0100-2654)
Temperature Sensors and Accessories (Metric) Product Data Sheet (Document Number
00813-0200-2654)
Rosemount Series 1075 and 1099 High-Temperature Thermocouples Product Data
Sheet (Document Number 00813-0400-2654)
1.3 Considerations
1.3.1 General
Electrical temperature sensors such as RTDs and thermocouples produce low-level signals
proportional to the sensed temperature. The Rosemount 148 converts the low-level sensor
signal to a standard 4–20 mA DC signal that is relatively insensitive to lead length and electrical
noise. This current signal is transmitted to the control room via two wires.
Section 1: Introduction
April 2014
1.3.2 Mechanical
Location
Take into account the need for access to the transmitter when choosing an installation location.
Special mounting
Special hardware is available for mounting a Rosemount 148 head mount transmitter to a DIN
rail.
1.3.3 Electrical
Proper electrical installation is necessary to prevent errors due to sensor lead resistance and
electrical noise. For best results, shielded cable should be used in electrically noisy
environments.
Make wiring connections through the cable entry in the side of the connection head. Be sure to
provide adequate clearance for cover removal.
1.3.4 Environmental
The transmitter electronics module is permanently sealed within the housing, resisting
moisture and corrosive damage. Verify that the operating atmosphere of the transmitter is
consistent with the appropriate hazardous locations certifications.
Introduction
3
Section 1: Introduction
60
50
40
30
20
10
0
75 10 125 150 175 200 225
Temperature Rise Above Ambient (°C)
Extension Length (mm)
8
1
5
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April 2014
Temperature effects
The transmitter will operate within specifications for ambient temperatures between -40 °F and
185 °F (-40 °C and 85 °C). Heat from the process is transferred from the thermowell to the
transmitter housing. If the expected process temperature is near or above specification limits,
consider using additional thermowell lagging, and extension nipple, or a remote mounting
configuration to isolate the transmitter from the process.
Figure 1-1 provides an example of the relationship between transmitter housing temperature
rise and extension length.
Figure 1-1. Rosemount 148 transmitter connection head temperature rise vs. Extension
Reference Manual
00809-0100-4148, Rev CA
length.
4
Example
The transmitter specification limit is 85 °C. If the ambient temperature is 55 °C and the process
temperature to be measured is 800 °C, the maximum permissible connection head temperature
rise is the transmitter specification limit minus the ambient temperature (moves 85 °C to 55 °C),
or 30 °C.
In this case, an extension of 100 mm meets this requirement, but 125 mm provides a margin of
8 °C, thereby reducing any temperature effects in the transmitter.
Introduction
Reference Manual
00809-0100-4148, Rev CA
1.4 Return of materials
To expedite the return process in North America, call the Emerson Process Management
National Response Center toll-free at 800-654-7768. This center, available 24 hours a day, can
assist with any needed information or materials.
The center will ask for the following information:
Product model
Serial numbers
The last process material to which the product was exposed
The center will provide:
A Return Material Authorization (RMA) number
Instructions and procedures that are necessary to return goods that were exposed to
hazardous substances
Note
If a hazardous substance is identified, a Material Safety Data Sheet (MSDS), required by law to be
available to people exposed to specific hazardous substances, must be included with the
returned materials.
Section 1: Introduction
April 2014
Outside of North America, contact a local Emerson Process Management representative.
1.5 Product recycling/disposal
Recycling of equipment and packaging should be taken into consideration and disposed of in
accordance with local and national legislation/regulations.
Introduction
5
Section 1: Introduction
April 2014
Reference Manual
00809-0100-4148, Rev CA
6
Introduction
Reference Manual
00809-0100-4148, Rev CA
Section 2 Installation
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 7
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 8
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 9
Set the switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 11
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 11
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 15
2.1 Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that potentially raises safety issues is
indicated by a warning symbol . Please refer to the following safety messages before
performing an operation preceded by this symbol.
Section 2: Installation
April 2014
2.1.1 Warnings
Failure to follow these installation guidelines could result in death or serious injury:
Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury:
Do not remove the connection head cover in explosive atmospheres when the circuit
is live.
Before connecting a communicator in an explosive atmosphere, make sure the
instruments in the loop are installed in accordance with intrinsically safe or
non-incendive field wiring practices.
Verify that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.
All connection head covers must be fully engaged to meet explosion-proof
requirements.
Process leaks could result in death or serious injury:
Do not remove the thermowell while in operation.
Install and tighten thermowells and sensors before applying pressure.
Electrical shock could cause death or serious injury:
Use extreme caution when making contact with the leads and terminals.
Installation
7
Section 2: Installation
START
HERE
Bench
Configuration?
BASIC SETUP
Set Sensor Type
Set Number of Wires
Set Units
Set Range Values
Set Damping
VERIFY
Simulate Sensor
Input (Optional)
Within
Specifications?
Refer to
Section 4: Operation
and maintenance
FIELD INSTALL
Mount Transmitter
Wire
Tra ns mit te r
Power
Tra ns mit te r
FINISHED
April 2014
Figure 2-1. Installation flowchart
Reference Manual
00809-0100-4148, Rev CA
2.2 Mounting
Mount the transmitter at a high point in the conduit run to prevent moisture from draining into
the transmitter housing.
The Rosemount 148 installs:
In a connection head or universal head mounted directly on a sensor assembly
Apart from a sensor assembly using a universal head
To a DIN rail using an optional mounting clip
8
Installation
Reference Manual
Tra ns mit te r
Mounting
Hardware
Rail Clip
00809-0100-4148, Rev CA
Mounting a Rosemount 148 to a DIN Rail
To attach a head mount transmitter to a DIN rail, assemble the appropriate rail mounting kit
(Part Number 00248-1601-0001) to the transmitter as shown in
Figure 2-2. Assembling rail clip hardware to a Rosemount 148.
2.3 Installation
Section 2: Installation
April 2014
Figure 2-2.
The Rosemount 148 can be ordered assembled to a sensor with the XA option code and
thermowell or as a stand-alone unit. If ordered without the sensor assembly, use the following
guidelines when installing the transmitter with an integral sensor assembly.
2.3.1 Typical European and Asia Pacific installation
Transmitter with DIN plate style sensor
1. Attach the thermowell to the pipe or process container wall. Install and tighten the
thermowell before applying process pressure.
2. Assemble the transmitter to the sensor. Push the transmitter mounting screws through
the sensor mounting plate and insert the snap rings (optional) into the transmitter
mounting screw groove.
3. Wire the sensor to the transmitter (see
4. Insert the transmitter-sensor assembly into the connection head. Thread the
transmitter mounting screw into the connection head mounting holes. Assemble the
extension to the connection head. Insert the assembly into the thermowell.
5. Slip the shielded cable through the cable gland.
6. Attach a cable gland into the shielded cable.
Figure 2-6 on page 13).
Installation
7. Insert the shielded cable leads into the connection head through the cable entry.
Connect and tighten the cable gland.
8. Connect the shielded power cable leads to the transmitter power terminals. Avoid
contact with sensor leads and sensor connections. (See
page 15
9. Install and tighten the connection head cover. Enclosure covers must be fully engaged
to meet explosion-proof requirements.
for instructions on grounding the shield wire.)
“Ground the transmitter” on
9
Section 2: Installation
A
D
B
C
E
F
April 2014
Figure 2-3. Typical European and Asia Pacific installation
A . Rosemount 148 Transmitter
B . Connection Head
C . Thermowell
D . Transmitter Mounting Screws
E . Integral Mount Sensor with Flying Leads
F . Extension
2.3.2 Typical North and South American installation
Reference Manual
00809-0100-4148, Rev CA
Transmitter with threaded sensor
1. Attach the thermowell to the pipe or process container wall. Install and tighten
thermowells before applying process pressure.
2. Attach necessary extension nipples and adapters to the thermowell. Seal the nipple and
adapter threads with silicone tape.
3. Turn the sensor into the thermowell until it is secure. Install drain seals if required for
severe environments or to satisfy code requirements.
4. Pull the sensor wiring leads through the universal head and transmitter. Mount the
transmitter in the universal head by threading the transmitter mounting screws into
the universal head mounting holes.
5. Mount the transmitter-sensor assembly into the thermowell. Seal adapter threads with
silicon tape.
6. Install conduit for field wiring to the conduit entry of the universal head. Seal conduit
threads with silicon tape.
7. Pull the field wiring leads through the conduit into the universal head. Attach the sensor
and power leads to the transmitter. Avoid contact with other terminals.
8. Install and tighten the universal head cover. Enclosure covers must be fully engaged to
meet explosion-proof requirements.
10
Installation
Reference Manual
A
B
C
D
E
00809-0100-4148, Rev CA
Figure 2-4. Typical North and South American installation
A . Threaded Thermowell
B . Threaded Style Sensor
C . Standard Extension
D . Universal Head
E . Conduit Entry
2.4 Set the switches
Section 2: Installation
April 2014
2.4.1 Failure mode
As part of normal operation, each transmitter continuously monitors its own performance. This
automatic diagnostics routine is a timed series of checks repeated continuously. If diagnostics
detect an input sensor failure or a failure in the transmitter electronics, the transmitter drives its
output to low or high alarm depending on the failure mode configuration. If the sensor (process)
temperature value is out of range, the transmitter outputs default saturation values. Low end
saturation levels are either 3.90 or 3.80 mA and the high end saturation level is 20.5 mA.
Corresponding NAMUR compliant operation levels are 3.80 and 20.5 mA. These values are also
custom configurable by the factory or using the Rosemount 148 PC Programmer interface. See
“
Section 3: Configuration” on page 19 for instructions on how to change the alarm and saturation
levels with the 148 PC Programmer.
Note
Microprocessor failures cause high alarm regardless of alarm direction (high or low) choice.
The values to which the transmitter drives its output in failure mode depend on whether it is
configured to standard, NAMUR-compliant, or custom operations. See (
NAMUR-compliant operation parameters.
2.5 Wiring
All power to the transmitter is supplied over the signal wiring. Use ordinary copper wire of
sufficient size to ensure that the voltage across the transmitter power terminals does not drop
below 12.0 V DC. Verify that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications. Use extreme caution when making contact with
the leads and terminals.
★) for standard and
Installation
If the sensor is installed in a high-voltage environment and a fault condition or installation error
occurs, the sensor leads and transmitter terminals could carry lethal voltages. Use extreme
caution when making contact with the leads and terminals.
11
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