Siemens SITRANS P LH300 Administrator guide

SITRANS P
Pressure transmitter
SITRANS LH300 Transmitter for
Hydrostatic Level
Compact Operating Instructions
7MF1575-.....-....
11/2022
A5E37897183-AD
Introduction 1
Safety instructions 2
Description 3
Installing/mounting 4
Connecting 5
Commissioning 6
Service and maintenance 7
Technical speci󹪝cations 8
Dimension drawings 9
Product documentation
and support 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.
Quali󹪝ed Personnel
The product/system described in this documentation may be operated only by personnel quali󹪝ed for the speci󹪝c
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Quali󹪝ed 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 identi󹪝ed 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
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number:A5E37897183
Ⓟ 01/2023 Subject to change
Copyright © SiemensAG 2022.
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 .................................................................................................. 5
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
2.1.3 Conformity with UK directives .............................................................................................. 8
2.2 Improper device modi󹪝cations.............................................................................................. 8
2.3 Requirements for special applications................................................................................... 8
2.4 Use in hazardous areas......................................................................................................... 9
3 Description........................................................................................................................................... 11
3.1 Application range .............................................................................................................. 11
3.2 Structure ........................................................................................................................... 11
3.3 Design of the nameplate.................................................................................................... 12
3.4 Mode of operation ............................................................................................................. 12
4 Installing/mounting ............................................................................................................................. 15
4.1 Basic safety instructions ..................................................................................................... 15
4.1.1 Proper mounting................................................................................................................ 16
4.1.2 Use in maritime deployment .............................................................................................. 16
4.2 Installation ........................................................................................................................ 17
4.3 Setting up the measuring points......................................................................................... 18
4.4 Establishing the measuring range ...................................................................................... 18
5 Connecting .......................................................................................................................................... 19
5.1 Basic safety instructions ..................................................................................................... 19
5.2 Connecting the device ....................................................................................................... 21
6 Commissioning .................................................................................................................................... 23
6.1 Basic safety instructions ..................................................................................................... 23
6.2 Calibrating......................................................................................................................... 23
7 Service and maintenance .................................................................................................................... 25
7.1 Basic safety instructions ..................................................................................................... 25
SITRANS LH300 Transmitter for Hydrostatic Level
Compact Operating Instructions, 11/2022, A5E37897183-AD 3

7.2 Calibrating......................................................................................................................... 25
7.3 Clean diaphragm ............................................................................................................... 25
7.4 Maintenance and repair work............................................................................................. 26
7.5 Return procedure............................................................................................................... 26
7.6 Disposal............................................................................................................................. 27
8 Technical speci󹪝cations ....................................................................................................................... 29
8.1 Certi󹪝cates and approvals................................................................................................... 32
9 Dimension drawings............................................................................................................................ 33
A Product documentation and support .................................................................................................. 35
A.1 Product documentation ..................................................................................................... 35
A.2 Technical support............................................................................................................... 36
Index .................................................................................................................................................... 37
Table of contents
SITRANS LH300 Transmitter for Hydrostatic Level
4Compact Operating Instructions, 11/2022, A5E37897183-AD

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, 󹪝rst review its principle of operation.
The instructions are aimed at persons mechanically installing the device, connecting it
electronically, con󹪝guring the parameters and commissioning it, as well as service and
maintenance engineers.
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 clari󹪝cation.
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.
1.3 Transportation and storage
To guarantee su󹪟cient 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 su󹪟cient protection during transport. Siemens cannot assume liability
for any costs associated with transportation damages.
NOTICE
Insu󹪟cient protection during storage
The packaging only provides limited protection against moisture and in󹪝ltration.
• Provide additional packaging as necessary.
SITRANS LH300 Transmitter for Hydrostatic Level
Compact Operating Instructions, 11/2022, A5E37897183-AD 5

Special conditions for storage and transportation of the device are listed in Technical
speci󹪝cations (Page29).
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 re󹪞ects 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
SITRANS LH300 Transmitter for Hydrostatic Level
6Compact Operating Instructions, 11/2022, A5E37897183-AD

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 speci󹪝cations 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 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.
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
equipment and protective systems intended for use in potentially
explosive atmospheres.
2011/65/EU RoHS Directive of the European Parliament and of the Council on the
restriction of the use of certain hazardous substances in electrical
and electronic equipment
SITRANS LH300 Transmitter for Hydrostatic Level
Compact Operating Instructions, 11/2022, A5E37897183-AD 7

The standards applied can be found in the EC declaration of conformity for the device.
2.1.3 Conformity with UK directives
The UKCA marking on the device shows conformity with the following UK regulations:
Electromagnetic Compatibility SI2016/1091 Electromagnetic Compatibility Directive 2016
Explosive Atmospheres SI2016/1107 Directive for Equipment and Protective Sys‐
tems Intended for use in Potentially Explosive
Atmospheres 2016
Directive on the Restriction of the Use of Cer‐
tain Hazardous Substances SI 2012/3032
Directive on the Restriction of the Use of Cer‐
tain Hazardous Substances in Electrical and
Electronic Equipment 2012
The applicable regulations can be found in the UKCA declaration of conformity of the speci󹪝c
device.
2.2 Improper device modi󹪝cations
WARNING
Improper device modi󹪝cations
Risk to personnel, system and environment can result from modi󹪝cations to the device,
particularly in hazardous areas.
• Only carry out modi󹪝cations 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 o󹪟ce 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.
Safety instructions
2.3Requirements for special applications
SITRANS LH300 Transmitter for Hydrostatic Level
8Compact Operating Instructions, 11/2022, A5E37897183-AD

2.4 Use in hazardous areas
Quali󹪝ed personnel for hazardous area applications
Persons who install, connect, commission, operate, and service the device in a hazardous
area must have the following speci󹪝c quali󹪝cations:
• 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 labelled
accordingly.
• Don't use devices that have been operated outside the conditions seci󹪝ed 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 speci󹪝cations (Page29)
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
speci󹪝cations 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 speci󹪝cations for the electrical data on the certi󹪝cate and/or in Technical
speci󹪝cations (Page29).
Safety instructions
2.4Use in hazardous areas
SITRANS LH300 Transmitter for Hydrostatic Level
Compact Operating Instructions, 11/2022, A5E37897183-AD 9

Safety instructions
2.4Use in hazardous areas
SITRANS LH300 Transmitter for Hydrostatic Level
10 Compact Operating Instructions, 11/2022, A5E37897183-AD

Description 3
3.1 Application range
The LH300 pressure transmitter 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
• Shipbuilding and marine equipment
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 e󹪜ectively protected against external in󹪞uences by a protective
cover.
The sensor, the electronics and the connecting cable are housed in an enclosure with small
dimensions.
The pressure transmitter is suitable for a wide temperature range.
SITRANS LH300 Transmitter for Hydrostatic Level
Compact Operating Instructions, 11/2022, A5E37897183-AD 11

3.3 Design of the nameplate
,,*([LD,,&7*D
①Article number ⑤Type of protection
②Characteristics for hazardous area ⑥Group (gas, dust)
③Serial number ⑦Maximum surface temperature (temperature class)
④Category for operating area ⑧Group (gas)
Figure3-1 Example of a nameplate
The pressure transmitter has a nameplate with the article number and other important
information, such as design details and technical speci󹪝cations.
You must also observe the information in the relevant certi󹪝cate for a transmitter version for
use in hazardous areas.
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.
Description
3.4Mode of operation
SITRANS LH300 Transmitter for Hydrostatic Level
12 Compact Operating Instructions, 11/2022, A5E37897183-AD

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
SITRANS LH300 Transmitter for Hydrostatic Level
Compact Operating Instructions, 11/2022, A5E37897183-AD 13

Description
3.4Mode of operation
SITRANS LH300 Transmitter for Hydrostatic Level
14 Compact Operating Instructions, 11/2022, A5E37897183-AD

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 speci󹪝cations (Page29).
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 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 speci󹪝cations (Page29).
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.
SITRANS LH300 Transmitter for Hydrostatic Level
Compact Operating Instructions, 11/2022, A5E37897183-AD 15

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 speci󹪝cations
(Page29).
CAUTION
Loss of type of protection
Damage to device if the enclosure is open or not properly closed. The type of protection
speci󹪝ed on the nameplate or in Technical speci󹪝cations (Page29) is no longer guaranteed.
• Make sure that the device is securely closed.
See also
Installing/mounting (Page15)
4.1.2 Use in maritime deployment
Note
In order to meet the 󹪞ame-retardant requirements of the attached cable, only use type-tested
sheathed cables with a cable connection length of ≥ 6m for a cable length.
Installing/mounting
4.1Basic safety instructions
SITRANS LH300 Transmitter for Hydrostatic Level
16 Compact Operating Instructions, 11/2022, A5E37897183-AD

4.2 Installation

①Level
②Measurement reference height
Figure4-1 Mounting the pressure transmitter (example with protective cover made of PPE)
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 360 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 on
the pressure transmitter.
Installing/mounting
4.2Installation
SITRANS LH300 Transmitter for Hydrostatic Level
Compact Operating Instructions, 11/2022, A5E37897183-AD 17

4.3 Setting up the measuring points

①Cable box ③Pressure transmitter
②Anchor clamp  
Figure4-2 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
SITRANS LH300 Transmitter for Hydrostatic Level
18 Compact Operating Instructions, 11/2022, A5E37897183-AD

Connecting 5
5.1 Basic safety instructions
WARNING
Maximum cable length exceeded for devices with type of protection "Intrinsic safety Ex
i"
Risk of explosion in hazardous areas.
To meet the requirements of devices with intrinsic safety "Ex i" type of protection, observe the
maximum permissible cable length in section Technical speci󹪝cations (Page29).
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 speci󹪝ed in Technical speci󹪝cations
(Page29).
• 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 󹪝rmly.
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 speci󹪝ed power supply and signal circuits. The
relevant speci󹪝cations can be found in the certi󹪝cates, in Chapter "Technical speci󹪝cations
(Page29)" 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.
SITRANS LH300 Transmitter for Hydrostatic Level
Compact Operating Instructions, 11/2022, A5E37897183-AD 19

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".
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
certi󹪝cate.
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19).
Connecting
5.1Basic safety instructions
SITRANS LH300 Transmitter for Hydrostatic Level
20 Compact Operating Instructions, 11/2022, A5E37897183-AD