Ultrasonic level transmitters
SITRANS Probe LU240 with mA/
HART
7ML51 (SITRANS Probe LU240)
Getting started
1
Compact Operating Instructions
Introduction
Safety notes
Description
Installing/mounting
Connecting
Commissioning
Service and maintenance
2
3
4
5
6
7
8
Technical data
HART communication
Certificates and support
9
10
11
10/2018
A5E42673704-AB
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property
damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified
personnel are those who, based on their training and experience, are capable of identifying risks and avoiding
potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended or
approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software described.
Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in
this publication is reviewed regularly and any necessary corrections are included in subsequent editions.
Siemens AG
Division Process Industries and Drives
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E42673704
Ⓟ 09/2018 Subject to change
11Certificates and support..............................................................................................................................57
These instructions are a brief summary of important features, functions and safety information,
and contain all information required for safe use of the device. Read the instructions carefully
prior to installation and commissioning. In order to use the device correctly, first review its
principle of operation.
The instructions are aimed at persons who install and commission the device.
To realize optimum performance from the device, read the complete operating instructions.
2.2Designated use
Use the device to measure process media in accordance with the information in the operating
instructions.
NOTICE
Use in a domestic environment
This Class A Group 1 equipment is intended for use in industrial areas.
2
In a domestic environment this device may cause radio interference.
2.3Product compatibility
The following table describes compatibility between document edition, device revision,
engineering system and associated Electronic Device Description (EDD).
Manual
edition
10/2018 First editionHART
RemarksDevice revisionCompatible version of device integration package
FW: 1.00.00 or later
HW: 1.00.00 or later
Device revision 1 or later
SIMATIC PDM V9.1EDD: 1.00.00 or later
AMS Device Manager V13.5EDD: 1.00.00 or later
SITRANS DTM V4.1 SP4EDD: 1.00.00 or later
Field communicator (FC)
375/475 V3.8
SITRANS libraryEDD: 1.00.00 or later
EDD: 1.00.00 or later
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 10/2018, A5E42673704-AB7
Introduction
2.5 Security information
2.4Checking the consignment
1. Check the packaging and the delivered items for visible damages.
2. Report any claims for damages immediately to the shipping company.
3. Retain damaged parts for clarification.
4. Check the scope of delivery by comparing your order to the shipping documents for
correctness and completeness.
WARNING
Using a damaged or incomplete device
Risk of explosion in hazardous areas.
● Do not use damaged or incomplete devices.
2.5Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines, and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is
necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial
security concept. Siemens’ products and solutions constitute one element of such a concept.
Customers are responsible for preventing unauthorized access to their plants, systems,
machines and networks. Such systems, machines and components should only be connected
to an enterprise network or the internet if and to the extent such a connection is necessary
and only when appropriate security measures (e.g. firewalls and/or network segmentation) are
in place.
For additional information on industrial security measures that may be implemented, please
visit:
https://www.siemens.com/industrialsecurity
Siemens’ products and solutions undergo continuous development to make them more secure.
Siemens strongly recommends that product updates are applied as soon as they are available
and that the latest product versions are used. Use of product versions that are no longer
supported, and failure to apply the latest updates may increase customer’s exposure to cyber
threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed under
https://www.siemens.com/industrialsecurity.
To guarantee sufficient protection during transport and storage, observe the following:
● Keep the original packaging for subsequent transportation.
● Devices/replacement parts should be returned in their original packaging.
● If the original packaging is no longer available, ensure that all shipments are properly
packaged to provide sufficient protection during transport. Siemens cannot assume liability
for any costs associated with transportation damages.
NOTICE
Insufficient protection during storage
The packaging only provides limited protection against moisture and infiltration.
● Provide additional packaging as necessary.
Special conditions for storage and transportation of the device are listed in Technical data
(Page 49).
Introduction
2.7 Notes on warranty
2.7Notes on warranty
The contents of this manual shall not become part of or modify any prior or existing agreement,
commitment or legal relationship. The sales contract contains all obligations on the part of
Siemens as well as the complete and solely applicable warranty conditions. Any statements
regarding device versions described in the manual do not create new warranties or modify the
existing warranty.
The content reflects the technical status at the time of publishing. Siemens reserves the right
to make technical changes in the course of further development.
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 10/2018, A5E42673704-AB9
This device left the factory in good working condition. In order to maintain this status and to
ensure safe operation of the device, observe these instructions and all the specifications
relevant to safety.
Observe the information and symbols on the device. Do not remove any information or symbols
from the device. Always keep the information and symbols in a completely legible state.
3.1.1Safety marking symbols
In manualOn productDescription
Dispose of in an environmentally safe manner, and according to local
3
WARNING: refer to accompanying documents (manual) for details.
regulations.
3.1.2Laws and directives
Observe the test certification, provisions and laws applicable in your country during connection,
assembly and operation. These include, for example:
● National Electrical Code (NEC - NFPA 70) (USA)
● Canadian Electrical Code (CEC) (Canada)
Further provisions for hazardous area applications are for example:
● IEC 60079-14 (international)
● EN 60079-14 (EU)
● For Korea only:
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 10/2018, A5E42673704-AB11
Safety notes
3.2 Requirements for special applications
3.1.3Conformity with European directives
The CE marking on the device symbolizes the conformity with the following European
directives:
Electromagnetic compatibili‐
ty EMC
2014/30/EU
Low voltage directive LVD
2014/35/EU
Atmosphère explosible
ATEX
2014/34/EU
2011/65/EU RoHSDirective of the European Parliament and the Council on the re‐
The applicable directives can be found in the EU declaration of conformity of the specific device.
WARNING
Improper device modifications
Risk to personnel, system and environment can result from modifications to the device,
particularly in hazardous areas.
● Only carry out modifications that are described in the instructions for the device. Failure
to observe this requirement cancels the manufacturer's warranty and the product
approvals.
Directive of the European Parliament and of the Council on the
harmonisation of the laws of the Member States relating to elec‐
tromagnetic compatibility
Directive of the European Parliament and of the Council on the
harmonisation of the laws of the Member States relating to the
making available on the market of electrical equipment designed
for use within certain voltage limits
Directive of the European Parliament and the Council on the har‐
monisation of the laws of the Member States relating to equip‐
ment and protective systems intended for use in potentially ex‐
plosive atmospheres
striction of the use of certain hazardous substances in electrical
and electronic equipment
3.2Requirements for special applications
Due to the large number of possible applications, each detail of the described device versions
for each possible scenario during commissioning, operation, maintenance or operation in
systems cannot be considered in the instructions. If you need additional information not
covered by these instructions, contact your local Siemens office or company representative.
Note
Operation under special ambient conditions
We highly recommend that you contact your Siemens representative or our application
department before you operate the device under special ambient conditions as can be
encountered in nuclear power plants or when the device is used for research and development
purposes.
Note
Operation under special atmospheric conditions
Ultrasonic measurement requires that the sound wave travel through the atmosphere in a
consistent manner. Applications with atmospheric conditions different from air (including, but
not limited to, gas layer stratification, very high methane or CO2 concentrations), should be
properly assessed to ensure safe, reliable use in the event of measurement errors due to sound
wave velocity changes.
3.3Use in hazardous areas
Qualified personnel for hazardous area applications
Persons who install, connect, commission, operate, and service the device in a hazardous
area must have the following specific qualifications:
● They are authorized, trained or instructed in operating and maintaining devices and systems
according to the safety regulations for electrical circuits, high pressures, aggressive, and
hazardous media.
Safety notes
3.3 Use in hazardous areas
● They are authorized, trained, or instructed in carrying out work on electrical circuits for
hazardous systems.
● They are trained or instructed in maintenance and use of appropriate safety equipment
according to the pertinent safety regulations.
WARNING
Use in hazardous area
Risk of explosion.
● Only use equipment that is approved for use in the intended hazardous area and labelled
accordingly.
● Don't use devices that have been operated outside the conditions specified for hazardous
areas. If you have used the device outside the conditions for hazardous areas permanently
make all Ex markings unrecognizable on the nameplate.
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 10/2018, A5E42673704-AB13
Safety notes
3.3 Use in hazardous areas
WARNING
Loss of safety of device with type of protection "Intrinsic safety Ex i"
If the device or its components have already been operated in non-intrinsically safe circuits
or the electrical specifications have not been observed, the safety of the device is no longer
ensured for use in hazardous areas. There is a risk of explosion.
● Connect the device with type of protection "Intrinsic safety" solely to an intrinsically safe
circuit.
● Observe the specifications for the electrical data on the certificate and/or in Technical
data (Page 49).
SITRANS Probe LU240 ultrasonic level transmitter with HART, 4 to 20 mA is ideal for level,
volume, and volume flow measurements. It works with liquids, slurries, and bulk materials up
to 12 meters (40 feet).
This device supports HART communication protocol.
Typical PLC/mA configuration
① power supply④ HART modem
② PLC⑤ HART communicator
③ R = 250 Ω
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 10/2018, A5E42673704-AB15
Risk of burns resulting from surface temperatures above 65 °C (149 °F).
● Take appropriate protective measures, for example contact protection.
● Make sure that protective measures do not cause the maximum permissible ambient
temperature to be exceeded. Refer to the information in Technical data (Page 49).
WARNING
Wetted parts unsuitable for the process media
Risk of injury or damage to device.
Hot, toxic and corrosive media could be released if the process medium is unsuitable for the
wetted parts.
● Ensure that the material of the device parts wetted by the process medium is suitable for
the medium. Refer to the information in Technical data (Page 49).
5
Note
Material compatibility
Siemens can provide you with support concerning selection of sensor components wetted by
process media. However, you are responsible for the selection of components. Siemens
accepts no liability for faults or failures resulting from incompatible materials.
WARNING
Unsuitable connecting parts
Risk of injury or poisoning.
In case of improper mounting, hot, toxic, and corrosive process media could be released at
the connections.
● Ensure that connecting parts (such as flange gaskets and bolts) are suitable for connection
and process media.
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 10/2018, A5E42673704-AB17
Installing/mounting
5.1 Basic safety notes
Exceeded maximum permissible operating pressure
Risk of injury or poisoning.
The maximum permissible operating pressure depends on the device version, pressure limit
and temperature rating. The device can be damaged if the operating pressure is exceeded.
Hot, toxic and corrosive process media could be released.
Ensure that maximum permissible operating pressure of the device is not exceeded. Refer
to the information on the nameplate and/or in Technical data (Page 49).
External stresses and loads
Damage to device by severe external stresses and loads (e.g. thermal expansion or pipe
tension). Process media can be released.
● Prevent severe external stresses and loads from acting on the device.
WARNING
CAUTION
5.1.1Installation location requirements
NOTICE
Strong vibrations
Damage to device.
● In installations with strong vibrations, mount the transmitter in a low vibration environment.
CAUTION
Aggressive atmospheres
Damage to device through penetration of aggressive vapors.
● Ensure that the device is suitable for the application.