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SITRANS
Pressure transmitter
SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level
Compact Operating Instructions
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.
1
Introduction
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 21)
© Siemens AG 2016. All rights reserved
A5E37897183-AA, 09/2016
3
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Summary of Contents for Siemens SITRANS LH300
- Page 1 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.
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Page 2: Safety Instructions
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. -
Page 3: Improper Device Modifications
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. -
Page 4: Application Range
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 suitable for a wide temperature range. SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016... -
Page 5: Design Of The Nameplate
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. ④ The protective conductor connection/equipotential bonding is connected to the enclosure. SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016... -
Page 6: Basic Safety Instructions
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. 4.1.1... -
Page 7: Installation
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. SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016... -
Page 8: Setting Up The Measuring Points
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 SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016... - Page 9 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. • SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016...
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Page 10: Connecting The Device
③ Brown Blue ② ④ Black Protective conductor connection/equipotential bonding Figure 5-1 Electrical connection Example In the case of applications in non-hazardous areas, you can connect the pressure transmitter as follows: SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016... - Page 11 Transmitter ② ④ Vent pipe Cable box Figure 5-2 Connection diagram ① ③ Vent pipe(s) Cable box venting ② ④ To transmitter To measured value processing Figure 5-3 Cable box, open SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016...
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Page 12: Maintenance And Servicing
The device is maintenance-free. WARNING Impermissible repair of explosion protected devices Risk of explosion in areas subject to explosion hazard. Repair must be carried out by Siemens authorized personnel only. • WARNING Use of a computer in a hazardous area If the interface to the computer is used in the hazardous area, there is a risk of explosion. -
Page 13: Return Procedure
Dispose of the device properly and environmentally through a local waste disposal contractor. • Technical specifications Gauge pressure input Measured variable Hydrostatic level Measuring range, max. Measuring range Maximum operating pressure MAWP (PS) SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016... - Page 14 Rated voltage 24 V DC • Measurement deviation with 0.15% of full-scale value (typical) limit setting, including 0.3% of full-scale value (maximum) hysteresis and for repeatability for measuring range Effect of ambient temperature SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016...
- Page 15 Cable box 7MF1575-8AA construction (accessory) Field of application For connecting the transmitter cable Weight 0.2 kg (0.44 lb) Electrical connection 2 x 3-way (cable diameter from 1 mm to 1.5 mm SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016...
- Page 16 Galvanized steel, polyamide Auxiliary power U Terminal voltage at transmitter 10 V DC to 30 V DC 10 V DC to 33 V DC Current consumption < 20.5 mA Reverse polarity protection SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016...
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Page 17: Certificates And Approvals
1 mm diameter (inside diameter) ③ ⑥ + (brown) Protective cover with 4 x 2.5 mm diameter hole Figure 9-1 Pressure transmitter with protective cover made of PPE/ETFE, dimensions in mm SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016... - Page 18 Pressure transmitter with protective cover made of stainless steel, dimensions in mm Cable box ① ③ Fastening hole Screwed gland Pg 13.5 ② Vent valve Figure 9-3 Cable box, dimensions in mm (inches) Anchor clamp Anchor clamp, dimensions in mm (inches) SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level A5E37897183-AA, 09/2016...
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Page 19: Technical Support
● Service&Support (http://www.siemens.com/automation/service&support) Personal contact If you have additional questions about the device, please contact your Siemens personal contact at: ● Partner (http://www.automation.siemens.com/partner) In order to find the contact for your product, select under 'All Products and Branches' the path 'Automation Technology >... - Page 20 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.