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FMR51
Operating Manual
204 pgs4.55 Mb0
Specifications
118 pgs3.82 Mb0
Table of contents
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Endress+Hauser FMR51 Operating Manual

BA01049F/00/EN/07.18 71394698 2018-04-12
Products Solutions Services
Operating Instructions
Micropilot FMR51, FMR52 HART
Free space radar
Micropilot FMR51, FMR52 HART
Order code:
Ext. ord. cd.:
Ser. no.:
www.endress.com/deviceviewer
Endress+Hauser Operations App
XXXXXXXXXXXX
XXXXX-XXXXXX
XXX.XXXX.XX
Serial number
1.
3.
2.
A0023555
2 Endress+Hauser
Micropilot FMR51, FMR52 HART Table of contents

Table of contents

1 Wichtige Hinweise zum
Dokument ......................... 5
1.1 Document function ..................... 5
1.2 Symbols .............................. 5
1.2.1 Safety symbols .................. 5
1.2.2 Electrical symbols ................ 5
1.2.3 Tool symbols .................... 5
1.2.4 Symbols for
certain types of information ......... 6
1.2.5 Symbols in graphics ............... 6
1.2.6 Symbols at the device ............. 7
1.3 Additional documentation ................ 7
1.4 Terms and abbreviations ................. 8
1.5 Registered trademarks ................... 9
2 Basic safety instructions ........... 10
2.1 Requirements for the personnel ........... 10
2.2 Designated use ....................... 10
2.3 Workplace safety ...................... 11
2.4 Operational safety ..................... 11
2.5 Product safety ........................ 11
2.5.1 CE mark ...................... 11
2.5.2 EAC conformity ................. 12
2.6 Safety Instructions (XA) ................. 12
6.4 Installation in vessel (free space) .......... 26
6.4.1 Horn antenna (FMR51) ........... 26
6.4.2 Measurement from the outside through plastic walls (FMR50/
FMR51) ...................... 28
6.4.3 Horn antenna, flush mount
(FMR52) ...................... 29
6.5 Installation in stilling well ............... 30
6.5.1 Recommendations for the stilling
well ......................... 30
6.5.2 Examples for the construction of
stilling wells ................... 31
6.6 Installation in bypass ................... 32
6.6.1 Recommendations for the bypass
pipe ......................... 32
6.6.2 Example for the construction of a
bypass ....................... 33
6.7 Container with heat insulation ............ 34
6.8 Turning the transmitter housing .......... 34
6.9 Turning the display .................... 35
6.9.1 Opening cover .................. 35
6.9.2 Turning the display module ........ 35
6.9.3 Closing electronics compartment
cover ........................ 36
6.10 Post-installation check .................. 36
3 Product description ................ 15
3.1 Product design ........................ 15
3.1.1 Micropilot FMR51 ............... 15
3.1.2 Micropilot FMR52 ............... 15
3.1.3 Electronics housing .............. 16
4 Incoming acceptance and product
identification ..................... 17
4.1 Incoming acceptance ................... 17
4.2 Product identification .................. 17
4.2.1 Nameplate .................... 18
5 Storage, Transport ................ 19
5.1 Storage conditions ..................... 19
5.2 Transport product to the measuring point .... 19
6 Installation ....................... 20
6.1 Installation conditions .................. 20
6.1.1 Mounting position ............... 20
6.1.2 Vessel installations .............. 21
6.1.3 Reduction of interference echoes .... 21
6.1.4 Measurement in a plastic vessel ..... 22
6.1.5 Optimization options ............. 22
6.1.6 Beam angle .................... 23
6.2 Measuring conditions .................. 24
6.3 Mounting cladded flanges ............... 25
7 Electrical connection .............. 37
7.1 Connection conditions .................. 37
7.1.1 Terminal assignment ............ 37
7.1.2 Cable specification ............... 43
7.1.3 Device plug connectors ........... 44
7.1.4 Supply voltage .................. 45
7.1.5 Overvoltage protection ........... 47
7.2 Connecting the measuring device .......... 47
7.2.1 Opening connection compartment
cover ........................ 48
7.2.2 Connecting .................... 48
7.2.3 Plug-in spring-force terminals ...... 49
7.2.4 Closing connection compartment
cover ........................ 49
7.3 Post-connection check .................. 50
8 Operation options ................. 51
8.1 Overview ............................ 51
8.1.1 Local operation ................. 51
8.1.2 Operation with remote display and
operating module FHX50 .......... 52
8.1.3 Operation via Bluetooth® wireless
technology .................... 53
8.1.4 Remote operation ............... 54
8.2 Structure and function of the operating
menu .............................. 55
8.2.1 Structure of the operating menu .... 55
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Table of contents Micropilot FMR51, FMR52 HART
8.2.2 User roles and related access
authorization .................. 57
8.2.3 Data access - Security ............ 57
8.3 Display and operating module ............ 62
8.3.1 Display appearance .............. 62
8.3.2 Operating elements .............. 65
8.3.3 Entering numbers and text ........ 66
8.3.4 Opening the context menu ......... 68
8.3.5 Envelope curve on the display and
operating module ............... 69
9 System integration via HART
protocol .......................... 70
9.1 Overview of the Device Description files
(DD) ............................... 70
9.2 Measured values via HART protocol ........ 70
10 Commissioning via SmartBlue
(app) ............................. 71
10.1 Requirements ........................ 71
10.2 Commissioning ....................... 71
11 Commissioning via wizard ......... 75
12 Commissioning via operating
menu ............................. 76
12.1 Installation and function check ............ 76
12.2 Setting the operating language ............ 76
12.3 Configuration of a level measurement ...... 77
12.4 Recording the reference curve ............ 79
12.5 Configuration of the on-site display ........ 80
12.5.1 Factory settings of the on-site
display ....................... 80
12.5.2 Adjustment of the on-site display ... 80
12.6 Configuration of the current outputs ........ 80
12.6.1 Factory setting of the current
outputs ....................... 80
12.6.2 Adjustment of the current outputs ... 80
12.7 Configuration management .............. 81
12.8 Protection of the settings against
unauthorized changes .................. 82
13 Diagnostics and troubleshooting ... 83
13.1 General trouble shooting ................ 83
13.1.1 General errors .................. 83
13.1.2 Error - SmartBlue operation ........ 84
13.1.3 Parametrization errors ........... 84
13.2 Diagnostic information on local display ...... 86
13.2.1 Diagnostic message .............. 86
13.2.2 Calling up remedial measures ...... 88
13.3 Diagnostic event in the operating tool ....... 89
13.4 Diagnostic list ........................ 90
13.5 Overview of diagnostic events ............. 91
13.6 Event logbook ........................ 92
13.6.1 Event history ................... 92
13.6.2 Filtering the event logbook ........ 93
13.6.3 Overview of information events ..... 93
13.7 Firmware history ...................... 94
14 Maintenance ...................... 95
14.1 Exterior cleaning ...................... 95
14.2 Replacing seals ....................... 95
15 Repairs ........................... 96
15.1 General information on repairs ............ 96
15.1.1 Repair concept ................. 96
15.1.2 Repairs to Ex-approved devices ..... 96
15.1.3 Replacement of an electronics
module ....................... 96
15.1.4 Replacement of a device .......... 96
15.2 Spare parts .......................... 97
15.3 Return .............................. 97
15.4 Disposal ............................ 97
16 Accessories ....................... 98
16.1 Device-specific accessories ............... 98
16.1.1 Weather protection cover ......... 98
16.1.2 Remote display FHX50 ........... 99
16.1.3 Horn protection for horn antenna .. 100
16.1.4 Horn protection for horn antenna with variable antenna extension ... 101
16.1.5 Overvoltage protection .......... 102
16.1.6 Gas-tight feedthrough ........... 102
16.1.7 Bluetooth module for HART devices 103
16.2 Communication-specific accessories ....... 104
16.3 Service-specific accessories .............. 105
16.4 System components ................... 106
17 Operating menu .................. 107
17.1 Overview of the operating menu
(SmartBlue) ......................... 107
17.2 Overview of the operating menu (display
module) ........................... 112
17.3 Overview of the operating menu (operating
tool) .............................. 119
17.4 "Setup" menu ........................ 125
17.4.1 "Mapping" wizard ............... 133
17.4.2 "Advanced setup" submenu ........ 135
17.5 "Diagnostics" menu .................... 180
17.5.1 "Diagnostic list" submenu ......... 182
17.5.2 "Event logbook" submenu ......... 183
17.5.3 "Device information" submenu ..... 184
17.5.4 "Measured values" submenu ....... 187
17.5.5 "Data logging" submenu .......... 189
17.5.6 "Simulation" submenu ........... 192
17.5.7 "Device check" submenu .......... 197
17.5.8 "Heartbeat" submenu ............ 199
Index ................................. 200
4 Endress+Hauser
Micropilot FMR51, FMR52 HART Wichtige Hinweise zum Dokument
DANGER
WARNING
CAUTION
NOTICE

1 Wichtige Hinweise zum Dokument

1.1 Document function

These Operating Instructions contain all the information that is required in various phases of the life cycle of the device: from product identification, incoming acceptance and storage, to mounting, connection, operation and commissioning through to troubleshooting, maintenance and disposal.

1.2 Symbols

1.2.1 Safety symbols

Symbol Meaning
DANGER!
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in serious or fatal injury.
WARNING!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in serious or fatal injury.
CAUTION!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in minor or medium injury.
NOTE!
This symbol contains information on procedures and other facts which do not result in personal injury.

1.2.2 Electrical symbols

Symbol Meaning
Direct current
Alternating current
Direct current and alternating current
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via a grounding system.
Protective Earth (PE)
A terminal which must be connected to ground prior to establishing any other connections.
The ground terminals are situated inside and outside the device:
• Inner ground terminal: Connects the protectiv earth to the mains supply.
• Outer ground terminal: Connects the device to the plant grounding system.

1.2.3 Tool symbols

Symbol Meaning
Torx screwdriver
A0013442
Flat blade screwdriver
A0011220
Endress+Hauser 5
Wichtige Hinweise zum Dokument Micropilot FMR51, FMR52 HART
A
1.
1.
-
.
Symbol Meaning
Cross-head screwdriver
A0011219
Allen key
A0011221
Hexagon wrench
A0011222

1.2.4 Symbols for certain types of information

Symbol Meaning
Permitted
Procedures, processes or actions that are permitted.
Preferred
Procedures, processes or actions that are preferred.
Forbidden
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information.
Reference to documentation.
Reference to page.
Reference to graphic.
Notice or individual step to be observed.
, 2., 3.… Series of steps.
Result of a step.
Help in the event of a problem.
Visual inspection.

1.2.5 Symbols in graphics

Symbol Meaning
1, 2, 3 ... Item numbers
, 2., 3.… Series of steps
A, B, C, ... Views
A-A, B-B, C-C, ... Sections
Hazardous area
Indicates a hazardous area.
Safe area (non-hazardous area)
Indicates the non-hazardous area.
6 Endress+Hauser
Micropilot FMR51, FMR52 HART Wichtige Hinweise zum Dokument

1.2.6 Symbols at the device

Symbol Meaning
Safety instructions
Observe the safety instructions contained in the associated Operating Instructions.
Temperature resistance of the connection cables
Specifies the minimum value of the temperature resistance of the connection cables.

1.3 Additional documentation

Document Purpose and content of the document
Technical Information TI01040F (FMR51, FMR52)
Brief Operating Instructions KA01100F (FMR51/FMR52, HART)
Description of Device Parameters GP01014F (FMR5x, HART)
Special documentation SD01087F
Special documentation SD01870F
Planning aid for your device
The document contains all the technical data on the device and provides an overview of the accessories and other products that can be ordered for the device.
Guide that takes you quickly to the 1st measured value
The Brief Operating Instructions contain all the essential information from incoming acceptance to initial commissioning.
Reference for your parameters
The document provides a detailed explanation of each individual parameter in the operating menu. The description is aimed at those who work with the device over the entire life cycle and perform specific configurations.
Functional Safety Manual
The document is part of the Operating Instructions and serves as a reference for application-specific parameters and notes.
Manual for Heartbeat Verification and Heartbeat Monitoring
The document contains descriptions of the additonal parameters and technical data which are available with the Heartbeat Verification and Heartbeat Monitoring application packages.
For an overview of the scope of the associated Technical Documentation, refer to the following:
• The W@M Device Viewer : Enter the serial number from the nameplate (www.endress.com/deviceviewer)
• The Endress+Hauser Operations App: Enter the serial number from the nameplate or scan the 2-D matrix code (QR code) on the nameplate.
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Wichtige Hinweise zum Dokument Micropilot FMR51, FMR52 HART

1.4 Terms and abbreviations

Term/abbreviation Explanation
BA Document type "Operating Instructions"
KA Document type "Brief Operating Instructions"
TI Document type "Technical Information"
SD Document type "Special Documentation"
XA Document type "Safety Instructions"
PN Nominal pressure
MWP Maximum Working Pressure
The MWP can also be found on the nameplate.
ToF Time of Flight
FieldCare Scalable software tool for device configuration and integrated plant asset management
solutions
DeviceCare Universal configuration software for Endress+Hauser HART, PROFIBUS,
FOUNDATION Fieldbus and Ethernet field devices
DTM Device Type Manager
DD Device Description for HART communication protocol
εr (DC value) Relative dielectric constant
Operating tool The term "operating tool" is used in place of the following operating software:
• FieldCare / DeviceCare, for operation via HART communication and PC
• SmartBlue (app), for operation using an Android or iOS smartphone or tablet.
BD Blocking Distance; no signals are analyzed within the BD.
PLC Programmable Logic Controller
CDI Common Data Interface
PFS Pulse Frequence Status (Switching output)
8 Endress+Hauser
Micropilot FMR51, FMR52 HART Wichtige Hinweise zum Dokument

1.5 Registered trademarks

®
HART
Registered trademark of the FieldComm Group, Austin, USA
Bluetooth®
The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by Endress+Hauser is under license. Other trademarks and trade names are those of their respective owners.
Apple®
Apple, the Apple logo, iPhone, and iPod touch are trademarks of Apple Inc., registered in the U.S.and other countries. App Store is a service mark of Apple Inc.
Android®
Android, Google Play and the Google Play logo are trademarks of Google Inc.
KALREZ®, VITON
Registered trademark of DuPont Performance Elastomers L.L.C., Wilmington, USA
TEFLON
®
Registered trademark of E.I. DuPont de Nemours & Co., Wilmington, USA
TRI CLAMP
Registered trademark of Alfa Laval Inc., Kenosha, USA
®
®
Endress+Hauser 9
Basic safety instructions Micropilot FMR51, FMR52 HART

2 Basic safety instructions

2.1 Requirements for the personnel

The personnel for installation, commissioning, diagnostics and maintenance must fulfill the following requirements:
Trained, qualified specialists must have a relevant qualification for this specific function
‣
and task. Are authorized by the plant owner/operator.
‣
Are familiar with federal/national regulations.
‣
Before starting work, read and understand the instructions in the manual and
‣
supplementary documentation as well as the certificates (depending on the application). Follow instructions and comply with basic conditions.
‣
The operating personnel must fulfill the following requirements:
Are instructed and authorized according to the requirements of the task by the facility's
‣
owner-operator. Follow the instructions in this manual.
‣

2.2 Designated use

Application and measured materials
The measuring device described in these Operating Instructions is intended for the continuous, contactless level measurement of liquids, pastes and sludge. The device can also be freely mounted outside closed metal vessels (e.g. above basins, open channels or open piles) because of its operating frequency of about 26 GHz, a maximum radiated pulsed power of 5.7 mW and an average power output of 0.015 mW (for the version with advanced dynamics: maximum pulse power: 23.3 mW; average power: 0.076 mW). Operation is completely harmless to humans and animals.
Observing the limit values specified in the "Technical data" and listed in the Operating Instructions and supplementary documentation, the measuring device may be used for the following measurements only:
Measured process variables: level, distance, signal strength
‣
Calculated process variables: Volume or mass in arbitrarily shaped vessels; flow
‣
through measuring weirs or flumes (calculated from the level by the linearization functionality)
To ensure that the measuring device remains in proper condition for the operation time:
Use the measuring device only for measured materials against which the process-
‣
wetted materials are adequately resistant. Observe the limit values in "Technical data".
‣
Incorrect use
The manufacturer is not liable for damage caused by improper or non-designated use.
Verification for borderline cases:
For special measured materials and cleaning agents, Endress+Hauser is glad to provide
‣
assistance in verifying the corrosion resistance of wetted materials, but does not accept any warranty or liability.
Residual risk
The electronics housing and its built-in components such as display module, main electronics module and I/O electronics module may heat to 80 °C (176 °F) during operation through heat transfer from the process as well as power dissipation within the electronics. During operation the sensor may assume a temperature near the temperature of the measured material.
10 Endress+Hauser
Micropilot FMR51, FMR52 HART Basic safety instructions
Danger of burns due to heated surfaces!
For high process temperatures: Install protection against contact in order to prevent
‣
burns.

2.3 Workplace safety

For work on and with the device:
Wear the required personal protective equipment according to federal/national
‣
regulations.

2.4 Operational safety

Risk of injury.
Operate the device in proper technical condition and fail-safe condition only.
‣
The operator is responsible for interference-free operation of the device.
‣
Conversions to the device
Unauthorized modifications to the device are not permitted and can lead to unforeseeable dangers.
If, despite this, modifications are required, consult with the manufacturer.
‣
Repair
To ensure continued operational safety and reliability,
Carry out repairs on the device only if they are expressly permitted.
‣
Observe federal/national regulations pertaining to repair of an electrical device.
‣
Use original spare parts and accessories from the manufacturer only.
‣
Hazardous area
To eliminate a danger for persons or for the facility when the device is used in the hazardous area (e.g. explosion protection, pressure vessel safety):
Based on the nameplate, check whether the ordered device is permitted for the
‣
intended use in the hazardous area. Observe the specifications in the separate supplementary documentation that is an
‣
integral part of these Instructions.

2.5 Product safety

This measuring device is designed in accordance with good engineering practice to meet state-of-the-art safety requirements, has been tested, and left the factory in a condition in which it is safe to operate. It meets general safety standards and legal requirements.
NOTICE
Loss of degree of protection by opening of the device in humid environments
If the device is opened in a humid environment, the degree of protection indicated on
‣
the nameplate is no longer valid. This may also impair the safe operation of the device.

2.5.1 CE mark

The measuring system meets the legal requirements of the applicable EC guidelines. These are listed in the corresponding EC Declaration of Conformity together with the standards applied.
Endress+Hauser confirms successful testing of the device by affixing to it the CE mark.
Endress+Hauser 11
Basic safety instructions Micropilot FMR51, FMR52 HART

2.5.2 EAC conformity

The measuring system meets the legal requirements of the applicable EAC guidelines. These are listed in the corresponding EAC Declaration of Conformity together with the standards applied.
Endress+Hauser confirms successful testing of the device by affixing to it the EAC mark.

2.6 Safety Instructions (XA)

Depending on the approval, the following Safety Instructions (XA) are supplied with the device. They are an integral part of the Operating Instructions.
Feature
010
BA ATEX: II 1 G Ex ia IIC T6-T1 Ga • FMR51
BB ATEX: II 1/2 G Ex ia IIC T6-T1 Ga/Gb • FMR51
BC ATEX: II 1/2 G Ex d [ia] IIC T6-T1 Ga/Gb • FMR51
BD ATEX: II 1/2/3 G Ex ic [ia Ga] IIC T6-T1
BG ATEX: II 3 G Ex nA IIC T6-T1 Gc • FMR51
BH ATEX: II 3 G Ex ic IIC T6-T1 Gc • FMR51
BL ATEX: II 1/2/3 G Ex nA [ia Ga] IIC T6-T1
B2 ATEX: II 1/2 G Ex ia IIC T6-T1 Ga/Gb
B3 ATEX: II 1/2 G Ex d [ia] IIC T6-T1 Ga/Gb
B4 ATEX:II 1/2 G Ex ia IIC T6-T1 Ga/Gb
CD CSA C/US DIP Cl.II,III Div.1 Gr.E-G FMR51 XA01113F XA01113F XA01113F XA01115F XA01113F
C2 CSA C/US IS Cl.I,II,III Div.1 Gr.A-G, NI Cl.1 Div.
C3 CSA C/US XP Cl.I,II,III Div.1 Gr.A-G, NI Cl.1
FB FM IS Cl.I,II,III Div.1 Gr.A-G, AEx ia, NI Cl.1
FD FM XP Cl.I,II,III Div.1 Gr.A-G, AEx d, NI Cl.1
FE FM DIP Cl.II,III Div.1 Gr.E-G FMR51 XA01117F XA01117F XA01117F XA01119F XA01117F
IA IECEx: Ex ia IIC T6-T1 Ga • FMR51
Approval Available for Feature 020 "Power Supply; Output"
• FMR52
• FMR52
• FMR52
• FMR51
Ga/Gb/Gc
Ga/Gb/Gc
ATEX: II 1/2 D Ex ia IIIC Txx°C Da/Db
ATEX: II 1/2 D Ex ta IIIC Txx°C Da/Db
ATEX: II 1/2 G Ex d [ia] IIC T6-T1 Ga/Gb
2, Ex ia
Div.2, Ex d
Div.2
Div.2
IB IECEx: Ex ia IIC T6-T1 Ga/Gb • FMR51
IC IECEx: Ex d [ia] IIC T6-T1 Ga/Gb • FMR51
ID IECEx: Ex ic [ia Ga] IIC T6-T1 Ga/Gb/Gc • FMR51
• FMR52
• FMR52
• FMR52
• FMR51
• FMR52
• FMR51
• FMR52
• FMR51
• FMR52
• FMR51
• FMR52
• FMR51
• FMR52
• FMR51
• FMR52
• FMR51
• FMR52
• FMR51
• FMR52
• FMR52
• FMR52
• FMR52
• FMR52
1)
A
XA00677F XA00677F XA00677F XA00685F -
XA00677F XA00677F XA00677F XA00685F -
XA00680F XA00680F XA00680F XA00688F XA00680F
XA00678F XA00678F XA00678F XA00686F XA00678F
XA00679F XA00679F XA00679F XA00687F XA00679F
XA00679F XA00679F XA00679F XA00687F XA00679F
XA00678F XA00678F XA00678F XA00686F XA00678F
XA00683F XA00683F XA00683F XA00691F -
XA00684F XA00684F XA00684F XA00692F XA00684F
XA00681F XA00681F XA00681F XA00689F -
XA01112F XA01112F XA01112F XA01114F -
XA01113F XA01113F XA01113F XA01115F XA01113F
XA01116F XA01116F XA01116F XA01118F -
XA01117F XA01117F XA01117F XA01119F XA01117F
XA00677F XA00677F XA00677F XA00685F -
XA00677F XA00677F XA00677F XA00685F -
XA00680F XA00680F XA00680F XA00688F XA00680F
XA00678F XA00678F XA00678F XA00686F XA00678F
2)
B
3)
C
4)/G 5)
E
6)/L 7)
K
12 Endress+Hauser
Micropilot FMR51, FMR52 HART Basic safety instructions
Feature
010
Approval Available for Feature 020 "Power Supply; Output"
IG IECEx: Ex nA IIC T6-T1 Gc • FMR51
1)
A
XA00679F XA00679F XA00679F XA00687F XA00679F
2)
B
3)
C
4)/G 5)
E
• FMR52
IH IECEx: Ex ic IIC T6-T1 Gc • FMR51
XA00679F XA00679F XA00679F XA00687F XA00679F
• FMR52
IL IECEx: Ex nA [ia Ga] IIC T6-T1 Ga/Gb/Gc • FMR51
XA00678F XA00678F XA00678F XA00686F XA00678F
• FMR52
I2 IECEx: Ex ia IIC T6-T1 Ga/Gb
IECEx: Ex ia IIIC Txx°C Da/Db
I3 IECEx: Ex d [ia] IIC T6-T1 Ga/Gb
IEXEx: Ex ta IIIC Txx°C Da/Db
I4 IECEx: Ex ia IIC T6-T1 Ga/Gb
IECEx: Ex d [ia] IIC T6-T1 Ga/Gb
JA JPN Ex d ia IIC T4 Ga/Gb • FMR51
• FMR51
• FMR52
• FMR51
• FMR52
• FMR51
• FMR52
XA00683F XA00683F XA00683F XA00691F -
XA00684F XA00684F XA00684F XA00692F XA00684F
XA00681F XA00681F XA00681F XA00689F -
XA01716F XA01716F - - -
• FMR52
JC JPN Ex d [ia] IIC T4 Ga/Gb • FMR51
XA01717F XA01717F - - -
• FMR52
JD JPN Ex d [ia] IIC T1 Ga/Gb FMR51 XA01717F XA01717F - - -
JE JPN Ex d [ia] IIC T2 Ga/Gb FMR51 XA01717F XA01717F
JF JPN Ex d [ia] IIC T3 Ga/Gb FMR52 XA01717F XA01717F - - -
KA KC Ex ia IIC T6 Ga • FMR51
XA01045F XA01045F XA01045F XA01047F -
• FMR52
KB KC Ex ia IIC T6 Ga/Gb • FMR51
XA01045F XA01045F XA01045F XA01047F -
• FMR52
KC KC Ex d[ia] IIC T6 • FMR51
XA01046F XA01046F XA01046F XA01048F XA01046F
• FMR52
MA INMETRO: Ex ia IIC T6 Ga • FMR51
XA01286F XA01287F XA01288F XA01296F -
• FMR52
MC INMETRO: Ex d[ia] IIC T6 Ga/Gb • FMR51
XA01292F XA01292F XA01293F XA01298F XA01294F
• FMR52
MH INMETRO: Ex ic IIC T6 Gc • FMR51
XA01289F XA01290F XA01291F XA01297F -
• FMR52
NA NEPSI Ex ia IIC T6 Ga • FMR51
XA01199F XA01199F XA01199F XA01208F -
• FMR52
NB NEPSI Ex ia IIC T6 Ga/Gb • FMR51
XA01199F XA01199F XA01199F XA01208F -
• FMR52
NC NEPSI Ex d[ia] IIC T6 Ga/Gb • FMR51
XA01202F XA01202F XA01202F XA01211F XA01202F
• FMR52
NG NEPSI Ex nA II T6 Gc • FMR51
XA01201F XA01201F XA01201F XA01210F XA01201F
• FMR52
NH NEPSI Ex ic IIC T6 Gc • FMR51
XA01201F XA01201F XA01201F XA01210F XA01201F
• FMR52
N2 NEPSI Ex ia IIC T6 Ga/Gb, Ex iaD 20/21 T85…
90oC
• FMR51
• FMR52
XA01205F XA01205F XA01205F XA01214F -
6)/L 7)
K
Endress+Hauser 13
Basic safety instructions Micropilot FMR51, FMR52 HART
Feature
010
N3 NEPSI Ex d[ia] IIC T6 Ga/Gb, DIP A20/21
8A FM/CSA IS+XP Cl.I,II,III Div.1 Gr.A-G • FMR51
1) 2-wire; 4-20mA HART
2) 2-wire; 4-20mA HART, switch output
3) 2-wire; 4-20mA HART, 4-20mA
4) 2-wire; FOUNDATION Fieldbus, switch output
5) 2-wire; PROFIBUS PA, switch output
6) 4-wire 90-253VAC; 4-20mA HART
7) 4-wire 10.4-48VDC; 4-20mA HART
Approval Available for Feature 020 "Power Supply; Output"
T85…90oC IP66
For certified devices the relevant Safety Instructions (XA) are indicated on the nameplate.
If the device is prepared for the remote display FHX50 (product structure: feature 030: Display, Operation", option L or M), the Ex marking of some certificates changes according to the following table
Feature 010 ("Approval")
BG L, M or N ATEX II 3G Ex nA [ia Ga] IIC T6-T1 Gc
BH L, M or N ATEX II 3G Ex ic [ia Ga] IIC T6-T1 Gc
B3 L, M or N ATEX II 1/2G Ex d [ia] IIC T6-T1 Ga/Gb,
IG L, M or N IECEx Ex nA [ia Ga] IIC T6-T1 Gc
IH L, M or N IECEx Ex ic [ia Ga] IIC T6-T1 Gc
I3 L, M or N IECEx Ex d [ia] IIC T6-T1 Ga/Gb,
MH L, M or N Ex ic [ia Ga] IIC T6 Gc
NG L, M or N NEPSI Ex nA [ia Ga] IIC T6-T1 Gc
NH L, M or N NEPSI Ex ic [ia Ga] IIC T6-T1 Gc
N3 L, M or N NEPSI Ex d [ia] IIC T6-T1 Ga/Gb, DIP A20/21 [ia D] TA,
Feature 030 ("Display, Operation")
• FMR51
• FMR52
• FMR52
1)
:
1)
A
XA01206F XA01206F XA01206F XA01215F XA01206F
• XA01112F
• XA01113F
• XA01116F
• XA01117F
2)
B
• XA01112F
• XA01113F
• XA01116F
• XA01117F
Ex marking
ATEX II 1/2D Ex ta [ia Db] IIIC Txx°C Da/Db
IECEx Ex ta [ia Db] IIIC Txx°C Da/Db
Txx°C IP6X
3)
C
• XA01112F
• XA01113F
• XA01116F
• XA01117F
4)/G 5)
E
• XA01114F
• XA01115F
• XA01118F
• XA01119F
6)/L 7)
K
-
1) The marking of certificates not mentioned in this table are not affected by the FHX50.
14 Endress+Hauser
Micropilot FMR51, FMR52 HART Product description
11
2
3 3 3
54
1
1 1 1
2 3 5
4
4
4

3 Product description

3.1 Product design

3.1.1 Micropilot FMR51

 1 Design of the Micropilot FMR51 (26 GHz)
1 Electronics housing 2 Process connection (Thread) 3 Horn antenna 4 Flange 5 Antenna extension

3.1.2 Micropilot FMR52

 2 Design of the Micropilot FMR52 (26 GHz)
1 Electronics housing 2 Tri-Clamp process connection 3 Dairy coupling 4 PTFE cladding 5 Flange
A0016818
A0016788
Endress+Hauser 15
Product description Micropilot FMR51, FMR52 HART
1
2
3
4
6
7
8
5
9

3.1.3 Electronics housing

A0012422
 3 Design of the electronics housing
1 Electronics compartment cover 2 Display module 3 Main electronics module 4 Cable glands (1 or 2, depending on instrument version) 5 Nameplate 6 I/O electronics module 7 Terminals (pluggable spring terminals) 8 Connection compartment cover 9 Grounding terminal
16 Endress+Hauser

Micropilot FMR51, FMR52 HART Incoming acceptance and product identification

4 Incoming acceptance and product
identification

4.1 Incoming acceptance

Upon receipt of the goods check the following:
• Are the order codes on the delivery note and the product sticker identical?
• Are the goods undamaged?
• Do the nameplate data match the ordering information on the delivery note?
• Is the DVD with the operating tool present? If required (see nameplate): Are the Safety Instructions (XA) present?
If one of these conditions is not satisfied, contact your Endress+Hauser Sales Center.

4.2 Product identification

The following options are available for identification of the measuring device:
• Nameplate specifications
• Extended order code with breakdown of the device features on the delivery note
• Enter serial numbers from nameplates in W@M Device Viewer ( www.endress.com/deviceviewer ): All information about the measuring device is displayed.
• Enter the serial number from the nameplates into the Endress+Hauser Operations App or scan the 2-D matrix code (QR code) on the nameplate with the Endress+Hauser Operations App: all the information for the measuring device is displayed.
For an overview of the scope of the associated Technical Documentation, refer to the following:
• The W@M Device Viewer: Enter the serial number from the nameplate (www.endress.com/deviceviewer)
• The Endress+Hauser Operations App: Enter the serial number from the nameplate or scan the 2-D matrix code (QR code) on the nameplate.
Endress+Hauser 17
Incoming acceptance and product identification Micropilot FMR51, FMR52 HART
20
21
22
24
25
23
26
1
2
3 4
5
6
7
8
9
10
19
18
17
16
15
14
Ext. ord. cd.:
Order code: Ser. no.:
T max =
p
LN =
Mat.:
Date:
FW:
Dev.Rev.:
Ta:
if modification see sep. label
X =
MWP:
12
11
47 (1.85)
92 (3.62)
mm (in)
13

4.2.1 Nameplate

A0019444
 4 Nameplate of the Micropilot
1 Device name 2 Address of manufacturer 3 Order code 4 Serial number (Ser. no.) 5 Extended order code (Ext. ord. cd.) 6 Process pressure 7 Antenna length (only for FMR51 with antenna extension) 8 Certificate symbol 9 Certificate and approval relevant data 10 Degree of protection: e.g. IP, NEMA 11 Document number of the Safety Instructions: e.g. XA, ZD, ZE 12 Data Matrix Code 13 Modification mark 14 Manufacturing date: year-month 15 Temperature resistance of the cable 16 Device revision 17 Additional information about the device version (certificates, approvals, communication): e.g. SIL, PROFIBUS 18 Firmware version (FW) 19 CE mark, C-Tick 20 Profibus PA: Profil-Version; FOUNDATION Fieldbus: Device ID 21 Material in contact with process 22 Permitted ambient temperature (Ta)
23 Size of the thread of the cable glands 24 Maximum process temperature 25 Signal outputs 26 Operating voltage
Only 33 digits of the extended order code can be indicated on the nameplate. If the extended order code exceeds 33 digits, the rest will not be shown. However, the complete extended order code can be viewed in the operating menu of the device: Extended order code 1 to 3 parameter
18 Endress+Hauser
Micropilot FMR51, FMR52 HART Storage, Transport

5 Storage, Transport

5.1 Storage conditions

• Permitted storage temperature: –40 to +80 °C (–40 to +176 °F)
• Use the original packaging.

5.2 Transport product to the measuring point

NOTICE
Housing or antenna horn may be damaged or break away.
Risk of injury!
Transport the measuring device to the measuring point in its original packaging or at
‣
the process connection. Do not fasten lifting devices (hoisting slings, lifting eyes etc.) at the housing or the
‣
antenna horn but at the process connection. Take into account the mass center of the device in order to avoid unintended tilting. Comply with the safety instructions, transport conditions for devices over 18kg
‣
(39.6lbs) (IEC61010).
A0016875
Endress+Hauser 19
Installation Micropilot FMR51, FMR52 HART
A
1 2 3

6 Installation

6.1 Installation conditions

6.1.1 Mounting position

• Recommended distance A from wall to outer edge of nozzle: ~ 1/6 of tank diameter. Nevertheless the device should not be installed closer than 15 cm (5.91 in) to the tank wall.
• Not in the center (2), as interference can cause signal loss.
• Not above the fill stream (3).
• It is recommended to us a weather protection cover (1) in order to protect the device from direct sun or rain.
A0016882
20 Endress+Hauser
Micropilot FMR51, FMR52 HART Installation

6.1.2 Vessel installations

Avoid any installations (point level switches, temperature sensors, braces, vacuum rings, heating coils, baffles etc.) inside the signal beam. Take into account the beam angle →  23.
A0018944

6.1.3 Reduction of interference echoes

Metallic screens mounted at a slope spread the radar signal and can, therefore, reduce interference echoes.
A0016890
Endress+Hauser 21
Installation Micropilot FMR51, FMR52 HART
2
3
1

6.1.4 Measurement in a plastic vessel

If the outer wall of the vessel is made of a non-conductive material (e.g. GRP), microwaves can also be reflected off interfering installations outside the vessel (e.g. metallic pipes (1), ladders (2), grates (3), ...). Therefore, there should be no such interfering installations in the signal beam. Please contact Endress+Hauser for further information.

6.1.5 Optimization options

• Antenna size The bigger the antenna, the smaller the beam angle α and the fewer interference echoes →  23.
• Mapping The measurement can be optimized by means of electronic suppression of interference echoes. See the Confirm distance parameter (→  129) for details.
• Antenna alignment Take into account the marker on the flange or threaded connection .
• Stilling well A stilling well can be applied to avoid interferences →  30.
• Metallic screens mounted at a slope They spread the radar signals and can, therefore, reduce interference echoes.
A0017123
22 Endress+Hauser
Micropilot FMR51, FMR52 HART Installation
a
D
W
a
D
_
=
2
2
. .
tan
W

6.1.6 Beam angle

A0016891
 5 Relationship between beam angle α, distance D and beamwidth diameter W
The beam angle is defined as the angle α where the energy density of the radar waves reaches half the value of the maximum energy density (3-dB-width). Microwaves are also emitted outside the signal beam and can be reflected off interfering installations.
Beam diameter W as a function of beam angle α and measuring distance D:
FMR51
Antenna size 40 mm (1½ in) 50 mm (2 in) 80 mm (3 in) 100 mm (4 in)
Beam angle α 23° 18° 10° 8°
Measuring
distance (D)
3 m (9.8 ft) 1.22 m (4 ft) 0.95 m (3.1 ft) 0.53 m (1.7 ft) 0.42 m (1.4 ft)
6 m (20 ft) 2.44 m (8 ft) 1.9 m (6.2 ft) 1.05 m (3.4 ft) 0.84 m (2.8 ft)
9 m (30 ft) 3.66 m (12 ft) 2.85 m (9.4 ft) 1.58 m (5.2 ft) 1.26 m (4.1 ft)
12 m (39 ft) 4.88 m (16 ft) 3.80 m (12 ft) 2.1 m (6.9 ft) 1.68 m (5.5 ft)
15 m (49 ft) 6.1 m (20 ft) 4.75 m (16 ft) 2.63 m (8.6 ft) 2.10 m (6.9 ft)
20 m (66 ft) 8.14 m (27 ft) 6.34 m (21 ft) 3.50 m (11 ft) 2.80 m (9.2 ft)
25 m (82 ft) 10.17 m (33 ft) 7.92 m (26 ft) 4.37 m (14 ft) 3.50 m (11 ft)
30 m (98 ft) - 9.50 m (31 ft) 5.25 m (17 ft) 4.20 m (14 ft)
35 m (115 ft) - 11.09 m (36 ft) 6.12 m (20 ft) 4.89 m (16 ft)
40 m (131 ft) - 12.67 m (42 ft) 7.00 m (23 ft) 5.59 m (18 ft)
45 m (148 ft) - - 7.87 m (26 ft) 6.29 m (21 ft)
60 m (197 ft) - - 10.50 m (34 ft) 8.39 m (28 ft)
70 m (230 ft) - - - 9.79 m (32 ft)
Beamwidth diameter W
Endress+Hauser 23
Installation Micropilot FMR51, FMR52 HART
FMR52
Antenna size 50 mm (2 in) 80 mm (3 in)
Beam angle α 18° 10°
Measuring distance (D) Beamwidth diameter W
3 m (9.8 ft) 0.95 m (3.1 ft) 0.53 m (1.7 ft)
6 m (20 ft) 1.9 m (6.2 ft) 1.05 m (3.4 ft)
9 m (30 ft) 2.85 m (9.4 ft) 1.58 m (5.2 ft)
12 m (39 ft) 3.80 m (12 ft) 2.1 m (6.9 ft)
15 m (49 ft) 4.75 m (16 ft) 2.63 m (8.6 ft)
20 m (66 ft) 6.34 m (21 ft) 3.50 m (11 ft)
25 m (82 ft) 7.92 m (26 ft) 4.37 m (14 ft)
30 m (98 ft) 9.50 m (31 ft) 5.25 m (17 ft)
35 m (115 ft) 11.09 m (36 ft) 6.12 m (20 ft)
40 m (131 ft) 12.67 m (42 ft) 7.00 m (23 ft)
45 m (148 ft) - 7.87 m (26 ft)
60 m (197 ft) - 10.50 m (34 ft)

6.2 Measuring conditions

• In case of boiling surfaces, bubbling or tendency for foaming use FMR53 or FMR54. Depending on its consistence, foam can either absorb microwaves or reflect them off the foam surface. Measurement is possible under certain conditions. For FMR50, FMR51 and FMR52, the additional option "Advanced dynamics" is recommended in these cases (feature 540: "Application Package", option EM).
• In case of heavy steam development or condensate, the maximum measuring range of FMR50, FMR51 and FMR52 may decrease depending on density, temperature and composition of the steam → use FMR53 or FMR54.
• For the measurement of absorbing gases such as ammonia NH3 or some
fluorocarbons
• The measuring range begins, where the beam hits the tank bottom. Particularly with dish bottoms or conical outlets the level cannot be detected below this point.
• In stilling well applications, the electromagnetic waves do not propagate completely outside the tube. It must be taken into account that the accuracy may be reduced in the area C. In order to guarantee the required accuracy in these cases, it is recommended to position the zero-point at a distance C above the end of the tube (see figure).
• In case of media with a low dielectric constant (εr = 1.5 to 4) visible through the medium at low levels (low height C). Reduced accuracy has to be expected in this range. If this is not acceptable, we recommend positioning the zero point at a distance C (see figure) above the tank bottom in these applications.
• In principle it is possible to measure up to the tip of the antenna with FMR51, FMR53 and FMR54. However, due to considerations regarding corrosion and build-up, the end of the measuring range should not be chosen any closer than A (see figure) to the tip of the antenna.
• When using FMR54 with planar antenna, especially for media with low dielectric constants, the end of the measuring range should not be closer than A: 1 m (3.28 ft) to the flange.
• The smallest possible measuring range B depends on the antenna version (see figure).
• The tank height should be at least H (see table).
2)
, please use Levelflex or Micropilot FMR54 in a stilling well.
3)
the tank bottom can be
2) Affected compounds are e.g. R134a, R227, Dymel 152a.
3) Dielectric constants of important media commonly used in various industries are summarized in the DC manual (CP01076F) and in the Endress +Hauser "DC Values App" (available for Android and iOS).
24 Endress+Hauser
Micropilot FMR51, FMR52 HART Installation
100%
0%
B
A
C
H
øD
A0018872
Device A [mm (in)] B [m (ft)] C [mm (in)] H [m (ft)]
FMR51 50(1.97)
FMR52 200(7.87)
> 0.2 (0.7) 50 to 250 (1.97 to 9.84) > 0.3 (1.0)

6.3 Mounting cladded flanges

• Use flange screws according to the number of flange holes.
• Tighten the screws with the required torque (see table).
• Retighten the screws after 24 hours or after the first temperature cycle.
• Depending on process pressure and process temperature check and retighten the screws at regular intervals.
Usually, the PTFE flange cladding also serves as a seal between the nozzle and the device flange.
Flange size Number of screws Recommended torque [Nm]
minimum maximum
EN
DN50/PN16 4 45 65
DN80/PN16 8 40 55
DN100/PN16 8 40 60
DN150/PN16 8 75 115
ASME
2"/150lbs 4 40 55
3"/150lbs 4 65 95
4"/150lbs 8 45 70
6"/150lbs 8 85 125
Endress+Hauser 25
Installation Micropilot FMR51, FMR52 HART
90°
90°
90°
90°
90°
90°
90°
90°
90°
90°
A
B
Flange size Number of screws Recommended torque [Nm]
minimum maximum
JIS
10K 50A 4 40 60
10K 80A 8 25 35
10K 100A 8 35 55
10K 100A 8 75 115

6.4 Installation in vessel (free space)

6.4.1 Horn antenna (FMR51)

Alignment
• Align the antenna vertically to the product surface. The maximum range may be reduced if the horn antenna is not vertically aligned.
• A marking at the flange (somewhere between the flange holes) or the boss enables alignment of the antenna. This marking must be aligned towards the tank wall as well as possible.
Depending on the device version the marking may be a circle or two short parallel lines.
Nozzle mounting
For optimum measurement, the tip of the antenna should extend below the nozzle. Depending on the antenna size this is achieved by the following maximum nozzle heights:
26 Endress+Hauser
A0018974
Micropilot FMR51, FMR52 HART Installation
H
max
H
max
øD
A0016820
 6 Nozzle height for horn antenna (FMR51)
Antenna
1)
Maximum nozzle height H
max
BA: Horn 40mm/1-1/2" 86 mm (3.39 in)
BB: Horn 50mm/2" 115 mm (4.53 in)
BC: Horn 80mm/3" 211 mm (8.31 in)
BD Horn 100mm/4" 282 mm (11.1 in)
1) Feature 070 of the product structure
Conditions for longer nozzles
If the medium has good reflective properties, higher nozzles can be accepted. In this case the maximum nozzle height, H
, is dependent on the nozzle diameter, D:
max
A0023611
Nozzle diameter D Maximum nozzle height
H
max
Recommended antenna
1)
40 mm (1.5 in) 100 mm (3.9 in) BA: Horn 40mm/1-1/2"
50 mm (2 in) 150 mm (5.9 in) BB: Horn 50mm/2"
80 mm (3 in) 250 mm (9.8 in) BC: Horn 80mm/3"
Endress+Hauser 27
Installation Micropilot FMR51, FMR52 HART
Nozzle diameter D Maximum nozzle height
H
max
100 mm (4 in) 500 mm (19.7 in) BD: Horn 100mm/4"
150 mm (6 in) 800 mm (31.5 in) BD: Horn 100mm/4"
1) Feature 070 of the product structure
Recommended antenna
1)
If the antenna doesn't extend below the nozzle, observe the following:
• The nozzle end must be smooth and free of burrs. If possible its edge should be rounded.
• An interference echo suppression must be performed.
• Please contact Endress+Hauser for applications with higher nozzles than those indicated in the table.
• For mounting in heigh nozzles the device is available in a version with an antenna extension of up to 1 000 mm (39.4 in)
4)
• The antenna extension may cause interference echoes in the near range. In this case it may occur that the maximum measurable level is reduced.
Threaded connection
For devices with a threaded connection it may be necessary - depending on the antenna size - to unmount the horn before fastening the device and to mount it again afterwards.
• Tighten with the hexagonal nut only.
• Tool : 55 mm hexagonal wrench
• Maximum permissible torque: 60 Nm (44 lbf ft)

6.4.2 Measurement from the outside through plastic walls (FMR50/ FMR51)

• Dielectric constant of the medium: εr > 10
• If possible, use an antenna 100 mm (4 in).
• The distance from the lower edge of the antenna to the tank ceiling should be about
100 mm (4 in).
• If possible, avoid mounting locations where condensation or build-up might occur.
• In case of outdoor mounting, the space between antenna and vessel has to be protected
from the elements.
• Do not mount any potential reflectors (e.g. pipes) outside the tank in the signal beam.
Suitable thickness of the tank ceiling:
Penetrated material PE PTFE PP Perspex
DK / ε
r
Optimum thickness
1) Other possible values for the thickness are multiples of the values listed (e.g. for PE: 7,6 mm (0.3 in), 11,4
mm (0.45 in)
1)
2.3 2.1 2.3 3.1
3.8 mm (0.15 in) 4.0 mm (0.16 in) 3.8 mm (0.15 in) 3.3 mm (0.13 in)
4) Feature 610 "Accessory mounted" of the product structure.
28 Endress+Hauser
Micropilot FMR51, FMR52 HART Installation
90°
90°
90°
90°
90°
90°
90°
90°
90°
90°
A
B
H
max

6.4.3 Horn antenna, flush mount (FMR52)

Alignment
• Align the antenna vertically to the product surface. The maximum range may be reduced if the horn antenna is not vertically aligned.
• A marking at the flange (somwhere between the flange holes) or the boss enables alignment of the antenna. This marking must be aligned towards the tank wall as well as possible.
A0018974
Depending on the device version the marking may be a circle or two short parallel lines.
Nozzle mounting
A0016819
 7 Nozzle height for horn antenna, flush mount (FMR52)
Antenna
BO: Horn 50mm/2" 500 mm (19.7 in)
BP: Horn 80mm/3" 500 mm (19.7 in)
1) Feature 070 of the product structure
1)
Maximum nozzle height H
max
Please contact Endress+Hauser for applications with higher nozzle.
• For flanges with PTFE cladding: Observe the notes on the mounting of cladded flanges →  25.
• Usually, the PTFE flange cladding also serves as a seal between the nozzle and the device flange.
Endress+Hauser 29
Installation Micropilot FMR51, FMR52 HART
1
90°

6.5 Installation in stilling well

A0016841
 8 Installation in stilling well
1 Marking for antenna alignment
• For horn antenna: Align the marking towards the slots of the stilling well.
• Measurements can be performed through an open full bore ball valve without any problems.
• After mounting, the housing can be turned 350° in order to facilitate access to the display and the terminal compartment →  34.

6.5.1 Recommendations for the stilling well

• Metal (no enamel coating; plastic on request).
• Constant diameter.
• Diameter of stilling well not larger than antenna diameter.
• Diameter difference between horn antenna and inner diameter of the stilling well as small as possible.
• Weld seam as smooth as possible and on the same axis as the slots.
• Slots offset 180° (not 90°).
• Slot width or diameter of holes max. 1/10 of pipe diameter, de-burred. Length and number do not have any influence on the measurement.
• Select horn antenna as big as possible. For intermedaite sizes (e.g. 180 mm (7 in)) select next larger antenna and adapt it mechanically (for horn antennas)
• At any transition (i.e. when using a ball valve or mending pipe segments), no gap may be left exceeding 1 mm (0.04 in).
• The stilling well must be smooth on the inside (average roughness Rz ≤
6.3 μm (248 μin)). Use extruded or parallel welded metal pipe. An extension of the pipe is possible with welded flanges or pipe sleeves. Flange and pipe have to be properly aligned at the inside.
• Do not weld through the pipe wall. The inside of the stilling well must remain smooth. In case of unintentional welding through the pipe, the weld seam and any unevenness on the inside need to be carefully removed and smoothened. Otherwise, strong interference echoes will be generated and material build-up will be promoted.
• In the case of smaller nominal widths flanges must be welded to the pipe such that they allow for a correct orientation (marker aligned toward slots).
30 Endress+Hauser
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