Siemens SITRANS LH100 Administrator guide

SITRANS P
Pressure transmitter
SITRANS LH100 Transmitter for
Hydrostatic Level
Compact Operating Instructions
7MF1572-.....
01/2019
A5E32588610-AA
Introduction 1
Safety instructions 2
Description 3
Installing/mounting 4
Connecting 5
Commissioning 6
Service and maintenance 7
Technical specifications 8
Dimension drawings 9
Appendix A A

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: A5E32588610
Ⓟ 01/2019 Subject to change
Copyright © Siemens AG 2019.
All rights reserved

Table of contents
1 Introduction...................................................................................................................................................5
1.1 Purpose of this documentation.................................................................................................5
1.2 Checking the consignment.......................................................................................................5
1.3 Transportation and storage ......................................................................................................6
1.4 Notes on warranty ....................................................................................................................6
2 Safety instructions ........................................................................................................................................7
2.1 Prerequisites for safe use ........................................................................................................7
2.1.1 Laws and directives..................................................................................................................7
2.1.2 Conformity with European directives........................................................................................7
2.2 Improper device modifications .................................................................................................8
2.3 Requirements for special applications .....................................................................................8
2.4 Use in hazardous areas ...........................................................................................................8
3 Description..................................................................................................................................................11
3.1 Application range ...................................................................................................................11
3.2 Structure.................................................................................................................................11
3.3 Design of the nameplate ........................................................................................................11
3.4 Mode of operation ..................................................................................................................12
4 Installing/mounting......................................................................................................................................13
4.1 Basic safety instructions.........................................................................................................13
4.1.1 Proper mounting.....................................................................................................................14
4.2 Installation ..............................................................................................................................15
4.3 Setting up the measuring points.............................................................................................16
4.4 Establishing the measuring range..........................................................................................16
5 Connecting .................................................................................................................................................17
5.1 Basic safety instructions.........................................................................................................17
5.2 Connecting the device............................................................................................................19
6 Commissioning ...........................................................................................................................................21
6.1 Basic safety instructions.........................................................................................................21
6.2 Calibrating ..............................................................................................................................21
7 Service and maintenance ...........................................................................................................................23
7.1 Basic safety instructions.........................................................................................................23
7.2 Calibrating ..............................................................................................................................23
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7.3 Clean diaphragm....................................................................................................................23
7.4 Maintenance and repair work.................................................................................................24
7.5 Return procedure ...................................................................................................................24
7.6 Disposal .................................................................................................................................25
8 Technical specifications..............................................................................................................................27
8.1 Certificates and approvals......................................................................................................30
9 Dimension drawings ...................................................................................................................................31
A Appendix A .................................................................................................................................................33
A.1 Technical support...................................................................................................................33
A.2 Certificates .............................................................................................................................34
Index...........................................................................................................................................................35
Table of contents
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Introduction 1
1.1 Purpose of this documentation
These instructions contain all information required to commission and use 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 mechanically installing the device, connecting it
electronically, configuring the parameters and commissioning it, as well as service and
maintenance engineers.
See also
Technical support (Page 33)
1.2 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.
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1.3 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 27).
1.4 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.
Introduction
1.4 Notes on warranty
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Safety instructions 2
2.1 Prerequisites for safe 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.
Symbol Explanation
Consult operating instructions
2.1.1 Laws and directives
Observe the safety rules, 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)
2.1.2 Conformity with European directives
The CE mark on the device is a sign of conformity with the following European directives:
Electromagnetic compatibili‐
ty 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.
Atmosphère explosible
ATEX
2014/34/EU
Directive of the European Parliament and of the Council on the
harmonisation of the laws of the Member States relating to equip‐
ment and protective systems intended for use in potentially ex‐
plosive atmospheres.
The standards applied can be found in the EC declaration of conformity for the device.
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2.2 Improper device modifications
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.
2.3 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 the device is used for research and development
purposes.
2.4 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.
Safety instructions
2.4 Use in hazardous areas
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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 secified for hazardous
areas. If you have used the device outside the conditions for hazardous areas permanently
make all Ex markings unrecognizable on the nameplate.
See also
Technical specifications (Page 27)
WARNING
Loss of safety of device with type of protection "Intrinsic safety Ex i"
If the device has 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 27).
Safety instructions
2.4 Use in hazardous areas
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Safety instructions
2.4 Use in hazardous areas
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Description 3
3.1 Application range
The pressure transmitter LH100 is a submersible sensor for hydrostatic level measurement.
The pressure transmitter measures the liquid levels in tanks, containers, channels and dams.
The pressure transmitter is available for various measuring ranges and optionally with
explosion protection. A cable box and an anchor clamp are available as accessories to make
installation easier.
The pressure transmitter is used, for example, in the following industrial areas:
● Water supply
● For use in pressureless/open tanks and wells
3.2 Structure
The pressure transmitter has a built-in ceramic sensor which is equipped with a Wheatstone
resistance bridge.
The pressure transmitter is equipped with electronics that is installed, together with the sensor,
in a stainless steel enclosure. There is also a vent pipe in the connecting cable.
The measuring diaphragm is effectively protected against external influences by a protective
cover.
The sensor, the electronics and the connecting cable are housed in an enclosure with small
dimensions.
The pressure transmitter is compensated for a wide temperature range.
3.3 Design of the nameplate
The pressure transmitter has a nameplate with the article number and other important
information, such as design details and technical specifications.
You must also observe the information in the relevant certificate for a transmitter version for use
in hazardous areas.
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,,*([LD,,&7*D
①Article number ②Type of protection
②Characteristics for hazardous area ③Group (gas, dust)
③Serial number ②Maximum surface temperature (temperature class)
①Category for operating area ②Group (gas)
Figure 3-1 Example of a nameplate
3.4 Mode of operation

①Sensor ①Protective conductor connection/
Equipotential bonding
②Connection for auxiliary power supply ②Hydrostatic pressure
③Vent pipe
Figure 3-2 Pressure transmitter, mode of operation and wiring diagram
On one side of the sensor ① the diaphragm is exposed to the hydrostatic pressure ⑤, which
is proportional to the immersion depth. This pressure is compared with the atmospheric
pressure. Pressure compensation is carried out using the vent pipe ③ in the connecting cable.
The hydrostatic pressure of the liquid column acts on the diaphragm of the sensor and transmits
the pressure to the Wheatstone resistance bridge in the sensor.
The output voltage signal of the sensor is fed to the electronics, where it is converted into an
output current signal of 4 mA to 20 mA.
The protective conductor connection/equipotential bonding ④ is connected to the enclosure.
Description
3.4 Mode of operation
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Installing/mounting 4
4.1 Basic safety instructions
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 specifications (Page 27).
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
Exceeded maximum ambient or process media temperature
Danger of explosion in hazardous areas.
Device damage.
● Make sure that the maximum permissible ambient and process media temperatures of the
device are not exceeded. Refer to the information in Technical specifications (Page 27).
NOTICE
Using a device with frozen process medium
Damage to the device through ice formation.
● Prevent ice formation on the pressure transmitter. The process medium must not freeze.
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4.1.1 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 27).
CAUTION
Loss of type of protection
Damage to device if the enclosure is open or not properly closed. The type of protection
specified on the nameplate or in Technical specifications (Page 27) is no longer guaranteed.
● Make sure that the device is securely closed.
Installing/mounting
4.1 Basic safety instructions
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4.2 Installation

①Distance from the start of the protective cover
to the height of the measuring diaphragm
③Measurement reference height
②Distance from the start of the thread pick-up
to the height of the measuring diaphragm
(version without protective cover)
④Level
Figure 4-1 Mounting the pressure transmitter, dimensions in mm
1. Install the pressure transmitter suspended downward on the cable.
2. To prevent measuring errors, fasten the pressure transmitter for moved process media.
3. Fasten the pressure transmitter by means of a guide tube or an additional weight on the
transmitter (max. tensile force on connecting cable 250 N).
4. Fasten the cable above the container with the anchor clamp.
5. Connect the cable itself with the cable box.
6. Mount the cable box at a location appropriate to its degree of protection (IP66) in the vicinity
of the measuring point.
7. To ensure proper functioning, make sure that the entry openings on the protective cover of
the pressure transmitter do not get soiled and that the process medium does not freeze.
Installing/mounting
4.2 Installation
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4.3 Setting up the measuring points

①Cable box ③Pressure transmitter
②Anchor clamp
Figure 4-2 Basic procedure for setting up the measuring points
4.4 Establishing the measuring range
Calculating the measuring range with process media with a density ≠ 1000 kg/m3 (process medium ≠
water)
p = ρ * g * h
with:
ρ = density of the process medium
g = local gravitational acceleration
h = maximum level
Installing/mounting
4.4 Establishing the measuring range
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Connecting 5
5.1 Basic safety instructions
WARNING
Unsuitable cables, cable glands and/or plugs
Risk of explosion in hazardous areas.
● Use only cable glands/plugs that comply with the requirements for the relevant type of
protection.
● Tighten the cable glands in accordance with the torques specified in Technical
specifications (Page 27).
● Close unused cable inlets for the electrical connections.
● When replacing cable, glands use only cable glands of the same type.
● After installation, check that the cables are seated firmly.
WARNING
Improper power supply
Risk of explosion in hazardous areas and loss of device safety as a result of incorrect power
supply, e.g. using direct current instead of alternating current.
● Connect the device in accordance with the specified power supply and signal circuits. The
relevant specifications can be found in the certificates, in Chapter "Technical specifications
(Page 27)" or on the nameplate.
● Always power the device with limited energy. Observe the following standards on limited
energy: UL61010-1 3rd Edition, Section 9.3 or LPS (Low Power Supply) in accordance with
UL60950-1 or Class 2 in accordance with UL1310 or UL1585.
WARNING
Lack of equipotential bonding
Risk of explosion through compensating currents or ignition currents through lack of
equipotential bonding.
● Ensure that the device is potentially equalized.
Exception: It may be permissible to omit connection of the equipotential bonding for devices
with type of protection "Intrinsic safety Ex i".
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WARNING
Unprotected cable ends
Risk of explosion through unprotected cable ends in hazardous areas.
● Protect unused cable ends in accordance with IEC/EN 60079-14.
WARNING
Improper laying of shielded cables
Risk of explosion through compensating currents between hazardous area and the
non‑hazardous area.
● Shielded cables that cross into hazardous areas should be grounded only at one end.
● If grounding is required at both ends, use an equipotential bonding conductor.
WARNING
Connecting device in energized state
Risk of explosion in hazardous areas.
● Connect devices in hazardous areas only in a de-energized state.
Exceptions:
● Devices having the type of protection "Intrinsic safety Ex i" may also be connected in
energized state in hazardous areas.
● Exceptions for type of protection "Increased safety ec" (Zone 2) are regulated in the
relevant certificate.
Note
Electromagnetic compatibility (EMC)
You can use this device in industrial environments, households and small businesses.
For metal housings there is an increased electromagnetic compatibility compared to high-
frequency radiation. This protection can be increased by grounding the housing,
see Connecting (Page 17).
Note
Improvement of interference immunity
● Lay signal cables separately to cables with voltages > 60 V.
● Use cable with twisted wires.
● Keep the device and the cables at a distance from strong electromagnetic fields.
Connecting
5.1 Basic safety instructions
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5.2 Connecting the device
Procedure

①Ventilation pipe or ventilation pipes ③Humidity filter
②Connection to transmitter ④Connection to measured value processing
Figure 5-1 Cable box (example for applications in hazardous area)
1. Connect the cable of the pressure transmitter to the terminals as follows:
– Green (-)
– Brown (+)
– White (protective conductor connection/potential equalization)
2. Insert the ventilation pipe ① into the cable box.
The ventilation pipe must be connected to the atmosphere. The humidity filter is used for this
purpose ③.
Connecting
5.2 Connecting the device
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Wiring diagram

①Atmospheric pressure ③Transmitter
②Vent pipe ④Cable box
Figure 5-2 Example for applications in hazardous area
Connecting
5.2 Connecting the device
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