Manual: Rosemount™ 5408 Level Transmitter with FOUNDATION™ Fieldbus Protocol
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Reference Manual
00809-0300-4408, Rev AE
Rosemount™ 5408 Level Transmitter
Non-Contacting Radar with FOUNDATION™ Fieldbus Protocol
April 2022
Safety messages
NOTICE
Read this manual before working with the product. For personal and system safety, and for optimum product performance,
ensure you thoroughly understand the contents before installing, using, or maintaining this product.
For technical assistance, contacts are listed below:
Customer Central
Technical support, quoting, and order-related questions.
• United States - 1-800-999-9307 (7:00 am to 7:00 pm CST)
• Asia Pacific- 65 777 8211
North American Response Center
Equipment service needs.
• 1-800-654-7768 (24 hours a day — includes Canada)
• Outside of these areas, contact your local Emerson representative.
WARNING
Failure to follow safe installation and servicing guidelines could result in death or serious injury.
Ensure the transmitter is installed by qualified personnel and in accordance with applicable code of practice.
Use the equipment only as specified in this manual. Failure to do so may impair the protection provided by the equipment.
For installations in hazardous locations, the transmitter must be installed according to the Rosemount 5408 and 5408:SIS Product
Certifications document and System Control Drawing (D7000002-885).
WARNING
Explosions could result in death or serious injury.
Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications.
Before connecting a handheld communicator in an explosive atmosphere, ensure the instruments are installed in accordance with
intrinsically safe or non-incendive field wiring practices.
In Explosion-proof/Flameproof and Non-Incendive/Type n installations, do not remove the transmitter covers when power is
applied to the unit.
Both transmitter covers must be fully engaged to meet Explosion-proof/Flameproof requirements.
WARNING
Electrical shock could cause death or serious injury.
In Explosion-proof/Flameproof and Non-Incendive/Type n installations, avoid contact with the leads and terminals. High voltage
that may be present on leads can cause electrical shock.
Ensure the mains power to the transmitter is off and the lines to any other external power source are disconnected or not powered
while wiring the transmitter.
WARNING
Process leaks could result in death or serious injury.
Ensure that the transmitter is handled carefully. If the process seal is damaged, gas might escape from the tank.
2
WARNING
Any substitution of non-recognized parts may jeopardize safety. Repair (e.g. substitution of components) may also
jeopardize safety and is not allowed under any circumstances.
Unauthorized changes to the product are strictly prohibited as they may unintentionally and unpredictably alter performance and
jeopardize safety. Unauthorized changes that interfere with the integrity of the welds or flanges, such as making additional
perforations, compromise product integrity and safety. Equipment ratings and certifications are no longer valid on any products
that have been damaged or modified without the prior written permission of Emerson. Any continued use of product that has
been damaged or modified without the written authorization is at the customer’s sole risk and expense.
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.
CAUTION
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 Rosemount nuclear-qualified products, contact your local Emerson Sales Representative.
CAUTION
Hot surfaces
The flange and process seal may be hot at high process temperatures. Allow to cool before servicing.
3
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Reference Manual Contents
00809-0300-4408 April 2022
Contents
Chapter 1 Introduction.............................................................................................................. 7
1.1 Using this manual........................................................................................................................ 7
1.2 NAMUR NE 53 revision history......................................................................................................8
1.3 Product certifications...................................................................................................................8
1.4 Product recycling/disposal...........................................................................................................8
Chapter 2 Transmitter overview.................................................................................................9
2.1 Measurement principle................................................................................................................9
2.2 Process characteristics...............................................................................................................10
2.3 Vessel characteristics.................................................................................................................12
2.4 Application examples.................................................................................................................12
2.5 Components of the transmitter................................................................................................. 14
2.6 System integration.................................................................................................................... 16
Chapter 3 Mechanical installation............................................................................................ 19
3.1 Safety messages........................................................................................................................ 19
3.2 Confirm approval type............................................................................................................... 20
3.3 Installation considerations.........................................................................................................20
3.4 Mounting preparations..............................................................................................................30
3.5 Mount the cone antenna............................................................................................................34
3.6 Mount the process seal antenna................................................................................................ 47
3.7 Mount the parabolic antenna.....................................................................................................51
3.8 Adjust display orientation (optional)..........................................................................................69
Chapter 4 Electrical installation................................................................................................71
4.1 Safety messages........................................................................................................................ 71
4.2 Hazardous areas........................................................................................................................ 72
4.3 Prepare the electrical connections............................................................................................. 72
4.4 Connect wiring and power up.................................................................................................... 75
Chapter 5 Configuration...........................................................................................................79
5.1 Safety messages........................................................................................................................ 79
5.2 Overview................................................................................................................................... 79
5.3 Get started with your preferred configuration tool.....................................................................80
5.4 Change device mode................................................................................................................. 82
5.5 Configure transmitter using guided setup................................................................................. 83
5.6 Run verify level...........................................................................................................................83
5.7 Write protect a transmitter........................................................................................................84
Chapter 6 Operation................................................................................................................ 85
6.1 LCD display screen messages.....................................................................................................85
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6.2 Set up the LCD display............................................................................................................... 86
6.3 View measurement data............................................................................................................87
6.4 Check device status................................................................................................................... 89
Chapter 7 Service and troubleshooting.................................................................................... 91
7.1 Safety messages........................................................................................................................ 91
7.2 Diagnostic messages per NAMUR NE 107.................................................................................. 92
7.3 FOUNDATION™ Fieldbus error messages......................................................................................103
Troubleshooting guides...........................................................................................................107
7.4
7.5 Service and troubleshooting tools............................................................................................121
7.6 Application challenges.............................................................................................................129
7.7 Replace the transmitter head...................................................................................................142
7.8 Cleaning or replacing the PTFE sealing.....................................................................................145
7.9 Service support........................................................................................................................150
Appendix A Specifications and reference data........................................................................... 151
A.1 Performance specifications......................................................................................................151
A.2 Functional specifications......................................................................................................... 154
A.3 Physical specifications............................................................................................................. 165
A.4 Spare parts list - transmitter head............................................................................................167
A.5 Spare parts list - antenna......................................................................................................... 172
A.6 Availability of process connections.......................................................................................... 179
A.7 Accessories..............................................................................................................................181
A.8 Dimensional drawings............................................................................................................. 182
Appendix B Configuration parameters...................................................................................... 193
B.1 Menu tree................................................................................................................................193
B.2 Device setup............................................................................................................................194
B.3 Level setup.............................................................................................................................. 197
B.4 Alert setup...............................................................................................................................214
Appendix C FOUNDATION™ Fieldbus Block Information............................................................
Resource block parameters..................................................................................................... 217
C.1
C.2 Analog Input block system parameters....................................................................................223
C.3 Measurement Transducer block parameters............................................................................232
C.4 Register Transducer block parameters.....................................................................................236
C.5 Supported units.......................................................................................................................238
217
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Reference Manual Introduction
00809-0300-4408 April 2022
1 Introduction
1.1 Using this manual
The sections in this manual provide information on installing, operating, and maintaining
the Rosemount™ 5408 Level Transmitter – Non-Contacting Radar.
The sections are organized as follows:
Transmitter overview provides an introduction to theory of operation, a description of the
transmitter, information on typical applications, and process characteristics.
Mechanical installation contains mechanical installation instructions.
Electrical installation contains electrical installation instructions.
Configuration provides instructions on configuration of the transmitter.
Operation contains operation and maintenance techniques.
Service and troubleshooting provides troubleshooting techniques for the most common
operating problems.
Specifications and reference data supplies reference and specification data, as well as
ordering information for spare parts and accessories.
Configuration parameters provides extended information about the configuration
parameters.
FOUNDATION™ Fieldbus Block Information provides information regarding the function
blocks.
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Introduction Reference Manual
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1.2 NAMUR NE 53 revision history
The Rosemount 5408 meets the NAMUR recommendation NE 53. Table 1-1 provides the
information necessary to ensure you have the correct device driver for your device.
Table 1-1: Identification and Compatibility According to NAMUR NE 53
Release
date
May-19 1.0.xx 1.0.xx 1.Axx ITK 6.3.1 1 Initial release
(1) NAMUR Revision is located on the transmitter label. Differences in level 3 changes, signified above by xx, represent
minor product changes as defined per NE53. Compatibility and functionality are preserved and product can be used
interchangeably.
(2) Device software revision is located on the transmitter label, e.g. 1.A8. It can also be found in Rosemount Radar Master
Plus (select Overview → Device Information → Revisions).
(3) Device revision can be read using a FOUNDATION Fieldbus capable configuration tool. For example, in Rosemount Radar
Master Plus, select Overview → Device Information → Revisions.
Device identification FDI, DD, and DTM
NAMUR
hardware
revision
(1)
NAMUR
software
revision
(1)
Device
software
revision
Conforming
FOUNDATION
(2)
Fieldbus
identification
Device
revision
Release note
(3)
Related information
Download the latest FDI Package
Download the latest Device Descriptor (DD)
Download the latest Device Type Manager (DTM)
1.3 Product certifications
See the Rosemount 5408 Product Certifications document for detailed information on the
existing approvals and certifications.
1.4 Product recycling/disposal
Recycling of equipment and packaging should be taken into consideration and disposed of
in accordance with local and national legislation or regulations.
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2 Transmitter overview
2.1 Measurement principle
The Rosemount 5408 is a two-wire transmitter for continuous level measurements using
fast-sweep Frequency Modulated Continuous Wave (FMCW) technology.
The transmitter continuously emits signal sweeps with a constantly varying frequency
towards the product surface. Since the transmitter continuously changes the frequency of
the transmitted signal, there will be a difference in frequency between the transmitted
and the reflected signals (see Figure 2-1).
The frequency of the reflected signal is subtracted from the frequency of the signal
transmitted at that moment, resulting in a low frequency signal which is proportional to
the distance to the product surface. This signal is further processed to obtain fast, reliable,
and highly accurate level measurements.
Figure 2-1: FMCW-method
Δf∼d=distance
Frequency (GHz)
A.
B.
Time (s)
C. Transmitted signal
D. Reflected signal
Rosemount 5408 Level Transmitter 9
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2.1.1 Signal processing
See Figure 2-2 for a schematic overview of the signal processing.
Figure 2-2: Flowchart of the Signal Processing
A. Microwave module
B. A/D converter
Fast Fourier transform (FFT)
C.
D. Peak search
E. Peak interpolation
F. Echo tracker
G. Echo identifier
H. Distance filtering
I. Variable calculation
J. LCD handler
K. FOUNDATION™ Fieldbus
2.2 Process characteristics
2.2.1 Dielectric constant
2.2.2 Foam and turbulence
A key parameter for measurement performance is reflectivity. A high dielectric constant of
the media provides better reflection and enables a longer measuring range.
Foaming liquids or turbulence may cause weak and varying surface echo amplitudes. The
effects of turbulence are usually minor, but in the most challenging conditions, the
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Reference Manual Transmitter overview
00809-0300-4408 April 2022
transmitter may be mounted in a still pipe. In addition, measurement performance can be
optimized by configuring the appropriate process conditions settings.
Measurement in foamy applications depends largely on the foam properties. When the
foam is light and airy, the actual product level is measured. For heavy and dense foam, the
transmitter may measure the level of the foam’s upper surface.
The Double Surface Handling function allows the user to select if the foam layer or product
surface should be used as output.
Related information
Process conditions
Double surface handling
2.2.3 Dust
Dust is often present in solids applications, and even if the non-contacting radar is not
affected by the dust in the vapor space, dust can be sticky and create a layer on the
antenna. If this layer becomes too thick, it may affect the measurement. This is best
managed by using air purging.
2.2.4 Solid surface
Solids have some common characteristics which may cause weak and varying surface
reflections. The surface is rarely flat or horizontal, the angle of the sloping surface differs
during filling and emptying, and the dielectric constant of many solids is fairly low. Table
2-1 presents common characteristics of some solids applications.
The parabolic antenna is ideal for applications with weak surface reflections. A larger
diameter concentrates the radar beam and ensures maximum antenna gain. The parabolic
antenna comes with a swivel connection that adjusts for angled tank roofs.
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Table 2-1: Common Characteristics of Solids Applications
Applications Common characteristics
Particle size Vapor space
Dust or
powder
Wood chip bins Yes Yes Yes Yes Possible
Grain silo - small kernel grains Yes Yes No Yes No
Grain silo - large kernel grains No Yes No No No
Lime stone silo No Yes Yes Possible No
Cement - raw mill silo Yes Yes No Yes No
Cement - finished product silo Yes Yes No Yes No
Coal bin Yes Yes Yes Yes Yes
Saw dust Yes Yes No Yes No
High consistency - pulp stock No No No No Yes
Alumina Yes Yes No Yes No
Salt No Yes Yes No No
Small (<1 in.) Larger (>1 in.) Dust Steam or
condensation
2.3 Vessel characteristics
2.3.1 In-tank obstructions
The transmitter should be mounted so that objects such as heating coils, ladders, and
agitators are not in the radar signal path. These objects may cause false echoes resulting in
reduced measurement performance. However, the transmitter has built-in functions
designed to reduce the influence from disturbing objects where such objects cannot be
totally avoided.
Vertical and inclined structures cause minimal effect since the radar signal is scattered
rather than directed back to the antenna.
2.3.2 Tank shape
The shape of the tank bottom affects the measurement signal when the product surface is
close to the tank bottom. The transmitter has built-in functions which optimize
measurement performance for various bottom shapes.
2.4 Application examples
The Rosemount 5408 is ideal for level measurements over a broad range of liquid and
solids applications. The transmitters are virtually unaffected by changing density,
temperature, pressure, media dielectric, pH, and viscosity. Non-contacting radar level is
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Reference Manual Transmitter overview
00809-0300-4408 April 2022
ideal for harsh conditions such as corrosive and sticky media, or when internal tank
obstructions are a limiting factor.
Storage and buffer tanks
The Rosemount 5408 provides accurate and reliable level measurement for both metallic
or non-metallic vessels containing almost any liquid (e.g. oil, gas condensate, water,
chemicals).
Reactors
The Rosemount 5408 is ideal for the most challenging applications, including reactors
where there can be agitation, foaming, and condensation, as well as high temperatures
and pressures.
Blenders and mixers
The Rosemount 5408 can help you withstand the rigors of blenders and mixing tanks. Easy
to install and commission, it is also unaffected by virtually any fluid property change.
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Open atmospheric applications
The Rosemount 5408 measures reliably in open applications, from short range sumps or
ponds to long range dams.
Still pipe and chamber installations
The Rosemount 5408 is a great choice for level measurement in tanks with small diameter
still pipes. It may also be used in chambers, but guided wave radar is generally the best fit
for these applications. For more information on using the Rosemount 5408 in still pipes
and chambers refer to the Best Practices for Using Radar in Still Pipes and Chambers
Technical Note.
Bulk solids
The Rosemount 5408 is the ideal solution for small- to medium-sized silos with rapid level
changes. The narrow beam avoids internal obstructions while still keeping good level
measurement.
2.5 Components of the transmitter
Figure 2-3 shows the different components of the transmitter. There are different antenna
types and sizes available for various applications.
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00809-0300-4408 April 2022
Figure 2-3: Components
A. Terminal compartment
B. Transmitter housing (aluminum or stainless steel)
C.
Sensor module with signal processing electronics
D. External ground screw
E. Flanged process connection
F. Cone antenna
G. Two cable/conduit entries (½-14 NPT, M20 x 1.5, or G½); Optional adapters: eurofast
H. LCD display (optional)
and minifast
I. Alignment marker (one per side)
™
™
J. Threaded process connection (NPT or BSPP (G))
K. Air purge ring (option code PC1 for cone antenna)
L. Integrated air purge connection
M. Parabolic antenna
N. Parabolic antenna with swivel mount
O. Process seal antenna
P. Tri Clamp process connection
Rosemount 5408 Level Transmitter 15
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April 2022 00809-0300-4408
2.6 System integration
The transmitter is loop-powered, and uses the same two wires for power supply and
output signal. FOUNDATION™ Fieldbus is an all-digital communication.
The transmitter can be connected to a Rosemount 752 Remote Indicator, or it can be
equipped with an integral display.
Figure 2-4: System Architecture
A. Host/DCS system (e.g. DeltaV)
B. Maintenance
C.
H2 - High speed field bus
D. Handheld communicator
E. Rosemount 5408 Level Transmitter
F. Rosemount 5300 Level Transmitter
G. Rosemount 752 Remote Indicator
H. PC with Rosemount Radar Master Plus
I. Fieldbus modem
J. H1 - Low speed fieldbus
The Rosemount 5408 is compliant with NAMUR NE 107 Field Diagnostics for standardized
device diagnostic information.
The Rosemount 5408 with signal output code U has a built-in terminator, as well as
terminal connections for daisy-chain wiring to other devices on the segment. Figure 2-5
illustrates a system with a number of field devices daisy-chained to a Rosemount 2410
Tank Hub.
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00809-0300-4408 April 2022
Figure 2-5: System with Several Tanks Daisy-chained to a Rosemount 2410 Tank Hub
A. Rosemount TankMaster
™
B. Rosemount 2460 System Hub
C.
Rosemount 2410 Tank Hub
D. Rosemount 2230 Graphical Field Display
E. Rosemount 5300 Level Transmitter
F. Rosemount 644 Temperature Transmitter
G. Rosemount 2240S Temperature Transmitter
H. Rosemount 5408 Level Transmitter
Rosemount 5408 Level Transmitter 17
Transmitter overview Reference Manual
April 2022 00809-0300-4408
18 Reference Manual
Reference Manual Mechanical installation
00809-0300-4408 April 2022
3 Mechanical installation
3.1 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 ( ). Refer to the following safety messages
before performing an operation preceded by this symbol.
WARNING
Failure to follow safe installation and servicing guidelines could result in death or
serious injury.
Ensure the transmitter is installed by qualified personnel and in accordance with applicable
code of practice.
Use the equipment only as specified in this manual. Failure to do so may impair the
protection provided by the equipment.
For installations in hazardous locations, the transmitter must be installed according to the
Rosemount 5408 and 5408:SIS Product Certifications document and System Control
Drawing (D7000002-885).
WARNING
Process leaks could result in death or serious injury.
Ensure that the transmitter is handled carefully. If the process seal is damaged, gas might
escape from the tank.
WARNING
Explosions could result in death or serious injury.
Verify that the operating atmosphere of the transmitter is consistent with the appropriate
hazardous locations certifications.
Rosemount 5408 Level Transmitter 19
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April 2022 00809-0300-4408
3.2 Confirm approval type
For hazardous locations transmitters labeled with multiple approval types:
Procedure
Permanently mark the checkbox of the selected approval type(s).
Figure 3-1: Label with Multiple Approval Types
3.3 Installation considerations
Before installing the transmitter, follow recommendations for mounting position,
sufficient free space, nozzle requirements, etc.
3.3.1 Mounting position
When finding an appropriate location on the tank for the transmitter, the conditions of the
tank must be carefully considered.
Consider the following guidelines when mounting the transmitter:
• For optimal performance, the transmitter should be installed in locations with a clear
and unobstructed view of the product surface.
• The transmitter should be mounted with as few internal structures as possible within
the signal beam.
• Do not install the transmitter in the center of the tank.
• Do not mount close to or above the inlet stream.
• Multiple Rosemount 5408 transmitters can be used in the same tank without
interfering with each other.
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Figure 3-2: Recommended Mounting Position
3.3.2 Free space requirements
If the transmitter is mounted close to a wall or other tank obstruction such as heating coils
and ladders, noise might appear in the measurement signal. See Table 3-1 for
recommended clearance.
For easy access to the transmitter, mount it with sufficient service space (see Table 3-2).
Figure 3-3: Free Space Requirements
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Table 3-1: Distance to Tank Wall (L)
Application Minimum Recommended
Liquids 8 in. (200 mm) ½ of tank radius
Solids 8 in. (200 mm) ⅔ of tank radius
Table 3-2: Free Space Requirements
Description Distance
Service space width (A) 20 in. (500 mm)
Service space height (B) 24 in. (600 mm)
3.3.3 Antenna size
Choose as large antenna diameter as possible. A larger antenna diameter concentrates the
radar beam and ensures maximum antenna gain. Increased antenna gain permits greater
margin for weak surface echoes.
In addition, a larger antenna diameter results in a smaller beam angle and thereby, less
interference from any internal structures in the tank.
3.3.4 Antenna inclination
Ensure the antenna is aligned perpendicular to the product surface (see Figure 3-4). The
parabolic antenna comes with a swivel connection that adjusts for angled tank roofs.
Note that if the surface echo is weak in solids applications, then a small inclination of the
parabolic antenna toward the surface slope may improve the performance.
22 Reference Manual
Max. 1.5°
90°
A
B
90°
Max. 3°
Reference Manual Mechanical installation
00809-0300-4408 April 2022
Figure 3-4: Inclination
A. Cone antenna/process seal antenna
B. Parabolic antenna
3.3.5 Non-metallic tanks
Nearby objects outside the tank may cause disturbing radar echoes. Wherever possible,
the transmitter should be positioned so that objects close to the tank are kept outside the
signal beam.
3.3.6 Beam width and beam angle
The transmitter should be mounted with as few internal structures as possible within the
signal beam. Refer to Table 3-3 for beam angle and Table 3-4 for beam width at different
distances.
Rosemount 5408 Level Transmitter 23
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Figure 3-5: Beam Angle and Beam Width
Table 3-3: Beam Angle
Antenna size Beam angle (α)
1½-in. (DN 40) cone 22°
2-in. (DN50) cone/process seal 18°
3-in. (DN80) cone/process seal 14°
4-in. (DN100) cone/process seal 10°
8-in. (DN200) parabolic 4.5°
Table 3-4: Beam Width, ft. (m)
Distance
(D)
16 (5) 6.2 (1.9) 5.2 (1.6) 4.0 (1.2) 2.9 (0.9) 1.3 (0.4)
33 (10) 12.8 (3.9) 10.4 (3.2) 8.1 (2.5) 5.7 (1.8) 2.6 (0.8)
49 (15) 19.0 (5.8) 15.6 (4.8) 12.1 (3.7) 8.6 (2.6) 3.9 (1.2)
66 (20) 25.6 (7.8) 20.8 (6.3) 16.1 (4.9) 11.5 (3.5) 5.2 (1.6)
82 (25) 31.8 (9.7) 26.0 (7.9) 20.1 (6.1) 14.3 (4.4) 6.4 (2.0)
98 (30) 38.4 (11.7) 31.2 (9.5) 24.2 (7.4) 17.2 (5.3) 7.7 (2.4)
1½-in. cone 2-in. cone/
process seal
Beam width (W)
3-in. cone/
process seal
4-in. cone/
process seal
Parabolic
131 (40) 51.2 (15.6) 41.6 (12.7) 32.2 (9.8) 23.0 (7.0) 10.3 (3.1)
24 Reference Manual
D
> 0.4 in. (10 mm)
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3.3.7 Nozzle requirements
To allow the microwaves to propagate undisturbed, the nozzle dimensions should be kept
within the specified limits as given in Table 3-5, Table 3-6, and Table 3-7.
Nozzle requirements for cone antenna
For best performance, the cone antenna should extend at least 0.4 in. (10 mm) below the
nozzle. If required, use the extended cone antenna versions (option code S1 or S2).
However, the antenna can be recessed in smooth nozzles up to 4 ft. (1.2 m). Note that if
the inside of the nozzle has irregularities (e.g. due to bad welding, rust, or deposit), then
use the extend cone antenna.
Figure 3-6: Mounting of the Cone Antenna
Table 3-5: Nozzle Requirements for Cone Antenna, in Inches (Millimeters)
Antenna size Minimum nozzle diameter (D)
1½-in. (DN 40) 1.50 (38.1) 5.59 (142) N/A
2-in. (DN50) 1.94 (49.3) 5.71 (145) 4.69 (119)
3-in. (DN80) 2.80 (71.0) 5.63 (143) 4.61 (117)
4-in. (DN100) 3.78 (96.0) 6.54 (166) 5.51 (140)
(1) The antennas are sized to fit within schedule 80 or lower schedules.
(2) The values are valid for cone antennas without antenna extension.
(3) For liquid applications, the cone antenna can be recessed in smooth nozzles up to 4 ft. (1.2 m), but note that the
accuracy may be reduced in the region close to the nozzle.
(1)
Recommended maximum nozzle height (H)
Antenna Antenna with air purge ring (code PC1)
(2)(3)
Nozzle requirements for process seal antenna
The antenna can be used on nozzles up to 4 ft. (1.2 m). Disturbing objects inside the
nozzle may impact the measurement, and should therefore be avoided.
Rosemount 5408 Level Transmitter 25
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A B
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April 2022 00809-0300-4408
Figure 3-7: Mounting of the Process Seal Antenna
Table 3-6: Nozzle Requirements for Process Seal Antenna
Antenna size Minimum nozzle diameter (D)
(1)
Recommended maximum nozzle height
(2)
(H)
2-in. (DN50) 1.77 in. (45 mm) 4 ft. (1.2 m)
3-in. (DN80) 2.76 in. (70 mm) 4 ft. (1.2 m)
4-in. (DN100) 2.76 in. (70 mm) 4 ft. (1.2 m)
(1) The antennas are sized to fit within schedule 120 or lower schedules.
(2) For hygienic applications, the nozzle height (H) must not exceed two times the nozzle diameter
(D) to ensure cleanability. Maximum nozzle height is 5 in. (127 mm).
Nozzle requirements for parabolic antenna
See Table 3-7 for nozzle height recommendations at different inclination angle.
Figure 3-8: Mounting of the Parabolic Antenna
A. Nozzle mounting
B. Flange mounting in manhole cover
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Table 3-7: Nozzle Requirements for Parabolic Antenna, in Inches (Millimeters)
Nozzle size (D) Inclination angle (α) Maximum nozzle height
Pipe schedule std, Ø 8 in. (200
mm)
Pipe schedule std, Ø10 in. (250
mm)
(1) Note that the inside of the nozzle must be smooth (i.e. avoid bad welding, rust, or deposit).
0° 6.1 (155)
3° 3.4 (85)
6° 1.6 (40)
9° 1.2 (30)
12° 1.0 (25)
15° 0.6 (15)
0° 17.2 (440)
3° 10.2 (260)
6° 7.1 (180)
9° 5.1 (130)
12° 3.9 (100)
15° 3.0 (75)
3.3.8 Still pipe/chamber installations
(H)
(1)
Installation in still pipe/chamber is recommended for tanks where there are excessive
foaming or turbulence. Still pipe/chamber may also be used to avoid disturbing objects in
the tank.
For more information and installation requirements, refer to the Best Practices for Using
Radar in Still Pipes and Chambers Technical Note.
Still pipe
Consider the following still pipe requirements:
Pipe
• Pipes should be an all-metal material.
• Pipe should have a constant inside diameter.
• The inner surface must be smooth and clear of any rough edges. (Smooth
pipe joints are acceptable, but may reduce accuracy.)
• The end of the pipe must extend beyond the zero level.
Holes
• Maximum hole diameter is 1 in. (25 mm).
• Minimum distance between holes is 6 in. (150 mm).
• Holes should be drilled on one side only and deburred.
• Drill one hole above maximum product surface.
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Antenna
• All cone/process seal antenna sizes can be used for still pipe/chamber
installations.
• The gap between the cone antenna and the still pipe should be maximum
0.2 in. (5 mm)
(1)
. Larger gaps may result in inaccuracies. If required, order a
larger antenna and cut on location. See Table A-14 for antenna dimensions.
Figure 3-9: Still Pipe Requirements
A. Maximum 0.2 in. (5 mm)
Maximum 1 in. (25 mm)
B.
C.
Minimum 6 in. (150 mm)
D. Maximum 1°
E. Level = 100%
F. Level = 0%
Chamber
Consider the following chamber requirements:
• Pipes should be an all-metal material.
• Pipe should have a constant inside diameter.
• Inlet pipes should not protrude into the inside of the stand pipe.
(1) A larger gap is inevitable for the 4-in. cone antenna in pipes with a diameter larger than 4 in.
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• The inner surface must be smooth and clear of any rough edges. (Smooth pipe joints
are acceptable, but may reduce accuracy.)
• The gap between the cone antenna and the stand pipe should be maximum 0.2 in. (5
(1)
mm)
. Larger gaps may result in inaccuracies. If required, order a larger antenna and
cut on location. See Table A-14 for antenna dimensions.
Figure 3-10: Chamber Requirements
A. Minimum 0.4 in. (10 mm)
B. Minimum 6 in. (150 mm)
Maximum 1°
C.
D. Maximum 0.2 in. (5 mm)
3.3.9 Ball valve installation
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The transmitter can be isolated from the process by using a valve:
• Use a full-port ball valve.
• Ensure there is no edge between the ball valve and the nozzle or still pipe, the inside
should be smooth.
• Valves can be combined with still pipes.
• The ball valve should have the same inner diameter as the still pipe.
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3.3.10 Shipboard installations
Transmitters with aluminum housing are not approved for open deck installations; for use
only in engine room, pump room, etc.
For application conditions and limitations refer to the applicable shipboard approval.
3.4 Mounting preparations
3.4.1 Assemble the segmented cone antenna
Prerequisites
This section applies to the segmented cone antenna (option code S2). Use only one
segment; the total antenna length should not exceed 47.2 in. (1200 mm).
Procedure
1. Determine the antenna length.
Figure 3-11: Installation Recommendation
A. Min. 0.4 in. (10 mm)
2. Insert the segment into the cone antenna until it bottoms.
3. Mark where to cut the segment.
4. Remove and cut the segment at the marking.
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