Siemens SITRANS Probe LU240 Administrator guide

SITRANS Probe LU240 with mA/HART
SITRANS L
Ultrasonic level transmitters
SITRANS Probe LU240 with
mA/HART
Compact Operating Instructions
7ML51 (SITRANS Probe LU240)
09/2021
A5E42673704
-AE
Getting started
1
Introduction
2
Safety notes
3
Description
4
Installing/mounting
5
Connecting
6
Commissioning
7
Service and maintenance
8
Technical specifications
9
HART communication
A
Product documentation and
support
B

Siemens AG
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E42673704
Ⓟ
11/2021 Subject to change
Copyright © Siemens AG 2021.
All rights reserved
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.

SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 09/2021, A5E42673704-AE 3
Table of contents
1 Getting started ...................................................................................................................................... 5
2 Introduction ........................................................................................................................................... 6
2.1 Purpose of this documentation ............................................................................................ 6
2.2 Designated use.................................................................................................................... 6
2.3 Product compatibility........................................................................................................... 7
2.4 Checking the consignment................................................................................................... 8
2.5 Security information ............................................................................................................ 8
2.6 Transportation and storage.................................................................................................. 9
2.7 Notes on warranty ............................................................................................................... 9
3 Safety notes......................................................................................................................................... 10
3.1 Preconditions for use ......................................................................................................... 10
3.2 Requirements for special applications................................................................................. 12
3.3 Use in hazardous areas ...................................................................................................... 13
4 Description........................................................................................................................................... 14
5 Installing/mounting ............................................................................................................................. 15
5.1 Basic safety notes .............................................................................................................. 15
5.1.1 Installation location requirements...................................................................................... 16
5.1.1.1 Recommended .................................................................................................................. 17
5.1.1.2 Avoid................................................................................................................................. 18
5.1.2 Proper mounting ............................................................................................................... 19
5.1.2.1 Process connections........................................................................................................... 19
5.2 Disassembly....................................................................................................................... 20
6 Connecting .......................................................................................................................................... 21
6.1 Basic safety notes .............................................................................................................. 21
6.2 Connecting SITRANS Probe LU240...................................................................................... 21
6.2.1 Wiring instructions............................................................................................................. 23
6.3 Hazardous area installations............................................................................................... 24
6.3.1 Nameplates for hazardous area installations....................................................................... 25
6.3.1.1 Intrinsic safety wiring......................................................................................................... 25
6.3.1.2 Non-incendive wiring......................................................................................................... 26
6.3.1.3 Further information related to hazardous area installations ................................................ 26
6.3.2 Instructions specific to hazardous area installations............................................................ 26
6.3.2.1 Instructions in accordance with IEC 60079-0:2011 clause 30.............................................. 27

Table of contents
SITRANS Probe LU240 with mA/HART
4Compact Operating Instructions, 09/2021, A5E42673704-AE
7 Commissioning .................................................................................................................................... 28
7.1 Basic safety notes .............................................................................................................. 28
7.2 Local commissioning ......................................................................................................... 28
7.2.1 Activating SITRANS Probe LU240........................................................................................ 28
7.2.2 Local display...................................................................................................................... 29
7.2.3 Display symbols ................................................................................................................. 29
7.2.4 Display views..................................................................................................................... 30
7.2.5 Parameter menus .............................................................................................................. 32
7.2.6 Programming .................................................................................................................... 33
7.2.7 Wizards ............................................................................................................................. 34
7.2.7.1 Quick commissioning: Level/Space/Distance/Custom .......................................................... 35
7.2.7.2 Quick commissioning: Volume ........................................................................................... 40
7.2.7.3 Quick commissioning: Volume flow ................................................................................... 41
8 Service and maintenance .................................................................................................................... 42
8.1 Basic safety notes .............................................................................................................. 42
8.2 Cleaning............................................................................................................................ 43
8.3 Maintenance and repair work............................................................................................. 43
8.3.1 Replacing the display ......................................................................................................... 44
8.3.1.1 Remove existing display..................................................................................................... 44
8.3.1.2 Install a new display........................................................................................................... 45
8.4 Return procedure............................................................................................................... 45
8.5 Disposal............................................................................................................................. 46
9 Technical specifications....................................................................................................................... 47
9.1 Power................................................................................................................................ 47
9.2 Performance...................................................................................................................... 48
9.3 Interface............................................................................................................................ 49
9.4 Outputs............................................................................................................................. 49
9.5 Construction...................................................................................................................... 49
9.6 Operating conditions ......................................................................................................... 50
9.7 Process .............................................................................................................................. 50
9.8 Communication................................................................................................................. 51
9.9 Approvals .......................................................................................................................... 51
A HART communication .......................................................................................................................... 52
B Product documentation and support .................................................................................................. 53
B.1 Product documentation ..................................................................................................... 53
B.2 Technical support .............................................................................................................. 54
B.3 QR code label .................................................................................................................... 54
Index.................................................................................................................................................... 55

SITRANS Probe LU240 with mA/HART
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Getting started
1
Introduction
Use this chapter as a quick reference. It provides links to the steps required for startup.
Before you begin, read the following safety information:
•General safety information (Page 10)
•Basic safety information: Installing/mounting (Page 15)
•Basic safety information: Connecting (Page 21)
•Basic safety information: Commissioning (Page 28)
Read the entire Operating Instructions to achieve optimum device performance.
Procedure
1. Install/mount the device.
Installation location requirements (Page 16)
2. Connect the device.
Connecting SITRANS Probe LU240 (Page 21)
3. Install (optional) display
Install a new display (Page 45)
4. Power up the device.
Activating SITRANS Probe LU240 (Page 28)
5. Commission the device via quick commissioning wizard:
Quick commissioning: Level/Space/Distance/Custom (Page 35)
Quick commissioning: Volume (Page 40)
Quick commissioning: Volume flow (Page 41)
Startup is complete.

SITRANS Probe LU240 with mA/HART
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Introduction
2
2.1 Purpose of this documentation
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.
2.2 Designated use
Use the device to measure process media in accordance with the Technical specifications
(Page 47).
For more information, refer to the operating instructions for the device.
NOTICE
Use in a domestic environment
This Class A Group 1 equipment is intended for use in industrial areas.
In a domestic environment this device may cause radio interference.

Introduction
2.3 Product compatibility
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2.3 Product compatibility
The following table describes compatibility between document edition, device revision,
engineering system and associated Electronic Device Description (EDD).
Manual
edition
Remarks Device revision Compatible version of device integration package
10/2020
Updated accuracy
specification
HART
FW: 1.01.02 or later
HW: 1.00.00 or later
Device revision 1 or later
SIMATIC PDM V9.1
EDD: 1.01.00 or later
AMS Device Manager V13.5
EDD: 1.01.00 or later
SITRANS DTM V4.1 SP4
EDD: 1.01.00 or later
Field communicator (FC) 375/475
V3.8
EDD: 1.01.00 or later
SITRANS library
EDD: 1.01.00 or later
mA
FW: 1.01.02 or later
HW: 1.00.00 or later
Device revision 1 or later
SIMATIC PDM V9.1
Not applicable
AMS Device Manager V13.5
SITRANS DTM V4.1 SP4
Field communicator (FC) 375/475
V3.8
SITRANS library
08/2019
New device features
HART
FW: 1.01.02 or later
HW: 1.00.00 or later
Device revision 1 or later
SIMATIC PDM V9.1
EDD: 1.01.00 or later
AMS Device Manager V13.5
EDD: 1.01.00 or later
SITRANS DTM V4.1 SP4
EDD: 1.01.00 or later
Field communicator (FC) 375/475
V3.8
EDD: 1.01.00 or later
SITRANS library
EDD: 1.01.00 or later
mA
FW: 1.01.02 or later
HW: 1.00.00 or later
Device revision 1 or later
SIMATIC PDM V9.1
Not applicable
AMS Device Manager V13.5
SITRANS DTM V4.1 SP4
Field communicator (FC) 375/475
V3.8
SITRANS library
10/2018
First edition
HART
FW: 1.00.00 or later
HW: 1.00.00 or later
Device revision 1 or later
SIMATIC PDM V9.1
EDD: 1.00.00 or later
AMS Device Manager V13.5
EDD: 1.00.00 or later
SITRANS DTM V4.1 SP4
EDD: 1.00.00 or later
Field communicator (FC) 375/475
V3.8
EDD: 1.00.00 or later
SITRANS library
EDD: 1.00.00 or later

Introduction
2.4 Checking the consignment
SITRANS Probe LU240 with mA/HART
8Compact Operating Instructions, 09/2021, A5E42673704-AE
2.4 Checking 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.
2.5 Security 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 (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 (https://www.siemens.com/industrialsecurity).

Introduction
2.6 Transportation and storage
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 09/2021, A5E42673704-AE 9
2.6 Transportation and storage
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
specifications (Page 47).
2.7 Notes 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.

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Safety notes
3
3.1 Preconditions for use
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.
In manual
On product
Description
WARNING: refer to accompanying documents (manual) for details.
Dispose of in an environmentally safe manner, and according to local
regulations.
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 Part I) (Canada)
Further provisions for hazardous area applications are for example:
•IEC 60079-14 (international)
•EN 60079-14 (EU and UK)
•For Korea only:

Safety notes
3.1 Preconditions for use
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 09/2021, A5E42673704-AE 11
The CE marking on the device symbolizes the conformity with the following European
directives:
Electromagnetic compatibil-
ity EMC
2014/30/EU
Directive of the European Parliament and of the Council on the
harmonisation of the laws of the Member States relating to elec-
tromagnetic compatibility
Low voltage directive LVD
2014/35/EU
Directive of the European Parliament and of the Council on the
ha
rmonisation of the laws of the Member States relating to the
making available on the market of electrical equipment de-
signed for use within certain voltage limits
Atmosphère explosible ATEX
2014/34/EU
Directive of the European Parliament and the Council on the
harmonisation of the laws of the Member States relating to
equipment and protective systems intended for use in potential-
ly explosive atmospheres
2011/65/EU RoHS
Directive of the European Parliament and the Council on the
restriction of the use of
certain hazardous substances in electri-
cal and electronic equipment
The applicable directives can be found in the EU declaration of conformity of the specific
device.
The UKCA marking on the device symbolizes the conformity with the following UK
regulations:
Electromagnetic compatibility EMC SI
2016/1091
Electromagnetic Compatibility Regulations
2016
Low Voltage LVD SI 2016/1101
Electrical Equipment (Safety) Regulations
2016
UKEX SI 2016/1107
Equipment and Protective Systems Intended
for use in Potentially Explosive Atmospheres
Regulations 2016
RoHS SI 2012/3032
The Restriction of the Use of Certain Hazard-
ous Substances in Elect
rical and Electronic
Equipment Regulations 2012
The applicable regulations can be found in the UKCA 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.

Safety notes
3.2 Requirements for special applications
SITRANS Probe LU240 with mA/HART
12 Compact Operating Instructions, 09/2021, A5E42673704-AE
3.2 Requirements 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 t
he 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 CO
2concentrations), should
be properly assessed to ensure safe, reliable use in the event of measurement errors due to
sound wave velocity changes.

Safety notes
3.3 Use in hazardous areas
SITRANS Probe LU240 with mA/HART
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3.3 Use 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.
•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 labeled
accordingly.
•Do not 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,
make all Ex markings unrecognizable on the nameplate.
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
specifications (Page 47).

SITRANS Probe LU240 with mA/HART
14 Compact Operating Instructions, 09/2021, A5E42673704-AE
Description
4
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).
Specific device versions (6 m, 12 m) support HART communication protocol.
Typical PLC/mA configuration
①
power supply
④
HART modem
②
PLC
⑤
HART communicator
③
R = 250 Ω

SITRANS Probe LU240 with mA/HART
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Installing/mounting
5
5.1 Basic safety notes
CAUTION
Hot surfaces resulting from hot process media
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 specifications
(Page 47).
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 wetted parts are unsuitable for the
process medium.
•
Ensure that the material of the device parts wetted by the process medium is suitable for
the medium. Refer to the information in Technical specifications (Page 47).
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.

Installing/mounting
5.1 Basic safety notes
SITRANS Probe LU240 with mA/HART
16 Compact Operating Instructions, 09/2021, A5E42673704-AE
WARNING
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 specifications (Page 47).
CAUTION
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.
5.1.1 Installation location requirements
NOTICE
Strong vibrations
Damage to device.
•In installations with strong vibrations, mount the transmitter in a low vibration
environment.
NOTICE
Aggressive atmospheres
Damage to device through penetration of aggressive vapors.
•
Ensure that the device is suitable for the application.

Installing/mounting
5.1 Basic safety notes
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 09/2021, A5E42673704-AE 17
NOTICE
Direct sunlight
Damage to device.
The device can overheat or materials become brittle due to UV exposure.
•Protect the device from direct sunlight.
•Make sure that the maximum permissible ambient temperature is not exceeded. Refer to
the information in Technical specifications (Page 47).
NOTICE
Mounting location
•Ideally, mount device so that face of transducer is at least 300 mm (1 ft) above the
highest anticipated material level.
5.1.1.1 Recommended
•Ambient temperature within –40 to +80 °C (–40 to +176 °F)
•Process temperature within –40 to +85 °C (–40 to +185 °F)
•Environment suitable to the housing rating and materials of construction
•Sound path perpendicular to the material surface
•Display and local buttons easily accessible for programming
•Cable entries easily accessible for wiring
•Sufficient room to open device lid with clear access
•Mounting surface free from vibration
•Place for a laptop computer provided for on-site configuration (optional, as laptop not
required for configuration)
NOTICE
Device rotation
The device can be rotated separate from the process connection.
•
There is no limit to the number of times device can be rotated without damage.

Installing/mounting
5.1 Basic safety notes
SITRANS Probe LU240 with mA/HART
18 Compact Operating Instructions, 09/2021, A5E42673704-AE
①
Customer-supplied flange
②
Ambient temperature surrounding enclosure –40 to +80 °C (–40 to +176 °F)
③
Device tag (optional)
5.1.1.2 Avoid
•Proximity to high voltage or current wiring, high voltage or current contacts, and to
variable frequency motor speed controllers
•Exposure to direct sunlight. (Provide a sun shield to avoid direct sunlight.)
•Interference to sound path from obstructions (such as rough walls, seams, rungs, etc.), or
from fill path
①
Pipe
②
Rungs
③
Seams

Installing/mounting
5.1 Basic safety notes
SITRANS Probe LU240 with mA/HART
Compact Operating Instructions, 09/2021, A5E42673704-AE 19
5.1.2 Proper mounting
NOTICE
Incorrect mounting
The device can be damaged, destroyed, or its functionality impaired through improper
mounting.
•Before installing ensure there is no visible damage to the device.
•Make sure that process connectors are clean, and suitable gaskets and glands are used.
•Mount the device using suitable tools. Refer to the information in Technical
specifications (Page 47).
5.1.2.1 Process connections
Process connections are available with three thread types:
•2" NPT [(Taper), ASME B1.20.1]
•R 2" [(BSPT), EN 10226]
•G 2" [(BSPP), EN ISO 228-1]
NOTICE
Process connection type
The thread type can be found on the device process connection, defined by a letter in the
mold, near the end of the threads.

Installing/mounting
5.2 Disassembly
SITRANS Probe LU240 with mA/HART
20 Compact Operating Instructions, 09/2021, A5E42673704-AE
N=NPT
B=R2/BSPT
P=G2/BSPP/PF2
1. Before inserting device into its mounting connection, ensure threads are of the same type to
avoid damaging them.
2. Screw device into process connection and hand tighten, or use a strap wrench to seat gasket
if required (1/4 turn past hand tight is recommended).
The process connection should be checked periodically following the initial installation, and
retightened accordingly.
5.2 Disassembly
WARNING
Incorrect disassembly
The following risks may result from incorrect disassembly:
- Injury through electric shock
- Risk through emerging media when connected to the process
- Risk of explosion in hazardous area
In order to disassemble correctly, observe the following:
•Before starting work, make sure that you have switched off all physical variables such as
pressure, temperature, electricity etc. or that they have a harmless value.
•If the device contains hazardous media, it must be emptied prior to disassembly. Make
sure that no environmentally hazardous media are released.
•Secure the remaining connections so that no damage can result if the process is started
unintentionally.