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Siemens SITRANS LG270 Operating Instructions Manual

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Guided Wave Radar
SITRANS LG270
Two-wire 4 ... 20 mA/HART
Coax probe
-20 ... +250 °C
Operating Instructions • 01/2020

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Summary of Contents for Siemens SITRANS LG270

  • Page 1 Guided Wave Radar SITRANS LG270 Two-wire 4 … 20 mA/HART Coax probe -20 … +250 °C Operating Instructions • 01/2020...
  • Page 2 SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 3: Table Of Contents

    Saving the parameterisation data ................... 48 Set up with other systems ....................49 DD adjustment programs ....................49 Field Communicator 375, 475 ..................49 Diagnostics and servicing ....................50 Maintenance ........................50 Diagnosis memory ......................50 PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 4 11.2 Dimensions ........................70 11.3 Trademark ........................73 Safety instructions for Ex areas Take note of the Ex specific safety instructions for Ex applications. These instructions are attached as documents to each instrument with Ex approval and are part of the operating instructions. Editing status: 2020-01-24 SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 5: About This Document

    The dot set in front indicates a list with no implied sequence. Sequence of actions Numbers set in front indicate successive steps in a procedure. Battery disposal This symbol indicates special information about the disposal of bat- teries and accumulators. PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 6: For Your Safety

    During work on and with the device, the required personal protective equipment must always be worn. Appropriate use SITRANS LG270 is a sensor for continuous level measurement. You can find detailed information about the area of application in chapter "Product description". Operational reliability is ensured only if the instrument is properly used according to the specifications in the operating instructions manual as well as possible supplementary instructions.

  • Page 7: Eu Conformity

    Installations in the US shall comply with the relevant requirements of the National Electrical Code (ANSI/NFPA 70). Installations in Canada shall comply with the relevant requirements of the Canadian Electrical Code A Class 2 power supply unit has to be used for the installation in the USA and Canada. PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 8: Product Description

    Sensor SITRANS LG270 • Optional accessory The further scope of delivery encompasses: • Documentation – Operating instructions SITRANS LG270 – Instructions for optional instrument features – Ex-specific "Safety instructions" (with Ex versions) – If necessary, further certificates Information: Optional instrument features are also described in this operating instructions manual.

  • Page 9: Principle Of Operation

    13 ID numbers, instrument documentation 14 Hardware and software version Principle of operation Application area The SITRANS LG270 is a level sensor with coax probe for continuous level or interface measurement, suitable for applications in liquids with high temperatures up to 250 °C (482 °F). Functional principle -...
  • Page 10 Distance to the interface d2 Distance to the level TS Thickness of the upper medium (d1 - d2) h1 Height - Interface h2 Height - Level L1 Lower medium L2 Upper medium L3 Gas phase SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 11: Packaging, Transport And Storage

    Ascertained transit damage or con- cealed defects must be appropriately dealt with. Storage Up to the time of installation, the packages must be left closed and stored according to the orientation and storage markings on the outside. PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 12: Accessories

    The LG Remote Interface is an external display and adjustment unit adjustment unit for sensors with single chamber housing and Ex d double chamber housing. Flanges Screwed flanges are available in different versions according to the following standards: DIN 2501, EN 1092-1, BS 10, ASME B 16.5, JIS B 2210-1984, GOST 12821-80. SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 13: Mounting

    Prior to setup you have to replace these protective caps with ap- proved cable glands or close the openings with suitable blind plugs. Note: Process conditions For safety reasons, the instrument must only be operated within the permissible process conditions. You can find detailed information on PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 14: Mounting Instructions

    Fig. 4: Vessel with conical bottom Welding work Before beginning the welding work, remove the electronics module from the sensor. By doing this, you avoid damage to the electronics through inductive coupling. Inflowing medium Do not mount the instruments in or above the filling stream. Make sure that you detect the product surface, not the inflowing product. SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 15 If there is a danger of the coaxial probe touching the vessel wall, then the probe must be fastened at the bottom end. Keep in mind that measurement is not possible below the fastening point. PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 16 Information: The spacer may be incorporated in the vessel insulation up to max. 50 mm (2 in). Only then is a reliable temperature decoupling guaran- teed. Fig. 7: Mounting the instrument on insulated vessels. Temperature insulation Ambient temperature on the housing SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 17 If there is a danger of the coaxial probe touching the vessel wall, then the probe must be fastened at the bottom end. Keep in mind that measurement is not possible below the fastening point. Fig. 8: Fasten the probe Coax probe Retaining sleeve PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 18: Connecting To Power Supply

    In the case of instrument housings with self-sealing NPT threads, it is not possible to have the cable entries screwed in at the factory. The free openings for the cable glands are therefore covered with red dust protection caps as transport protection. SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 19: Connecting

    2. If a display and adjustment module is installed, remove it by turn- ing it slightly to the left 3. Loosen compression nut of the cable gland and remove blind plug 4. Remove approx. 10 cm (4 in) of the cable mantle, strip approx. 1 cm (0.4 in) of insulation from the ends of the individual wires 5. Insert the cable into the sensor through the cable entry PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 20: Wiring Plan, Single Chamber Housing

    10. Reinsert the display and adjustment module, if one was installed 11. Screw the housing lid back on The electrical connection is finished. Wiring plan, single chamber housing The following illustration applies to the non-Ex, Ex-ia and Ex-d ver- sion. SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 21: Wiring Plan, Double Chamber Housing

    The following illustration applies to the non-Ex, Ex-ia and Ex-d ver- sion. Electronics compartment 4...20mA 6 7 8 Fig. 11: Electronics compartment - double chamber housing Internal connection to the connection compartment For display and adjustment module or interface adapter PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 22: Wiring Plan, Ex-D-Ia Double Chamber Housing

    For display and adjustment module or interface adapter Internal connection to the plug connector for external display and adjust- ment unit (optional) Note: HART multidrop mode is not possible when using an Ex-d-ia instru- ment. SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 23: Supplementary Electronics

    PC • The output signal jumps briefly to the set fault current Then the actual measured value is output to the signal cable. The value takes into account settings that have already been carried out, e.g. default setting. PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 24: Set Up With The Display And Adjustment Module

    Fig. 16: Installing the display and adjustment module in the electronics compart- ment of the single chamber housing Fig. 17: Installing the display and adjustment module in the double chamber housing In the electronics compartment In the connection compartment SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 25: Adjustment System

    5 s, the display returns to the main menu. The menu language is then switched over to "English". Approx. 60 minutes after the last pressing of a key, an automatic reset to measured value indication is triggered. Any values not confirmed with [OK] will not be saved. PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 26: Parameter Adjustment - Quick Setup

    Switch-on phase After switching on, the SITRANS LG270 carries out a short self-test where the device software is checked. The output signal transmits a fault signal during the switch-on phase. The following information is displayed on the display and adjustment module during the startup procedure: •...
  • Page 27 "->" key you jump to the next position. You can enter names with max. 19 characters. The character set comprises: • Capital letters from A … Z • Numbers from 0 … 9 • Special characters + - / _ blanks PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 28 In this menu item, you can define the type of medium (product). Application - Medium, dielectric constant This menu item is only available if you have selected level measure- ment under the menu item "Application". SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 29 Max. adjustment level In this menu item you can enter the max. adjustment for the level. With interface measurement this is the maximum total level. Adjust the requested percentage value with [+] and store with [OK]. PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 30 As an alternative, you have the possibility taking over the adjustment of the level measurement also for the interface. Enter the respective distance value in m for the surface of the upper medium corresponding to the percentage value. SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 31 In the following, you have to enter the values for your vessel, for example the vessel height and the socket correction. PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 32 Current output, min./max. In the menu item "Current output Min./Max.", you determine the reac- tion of the current output during operation. The default setting is min. current 3.8 mA and max. current 20.5 mA. SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 33 The menu item "Delete" is used to completely delete an already cre- ated false signal suppression. This is useful if the saved false signal suppression no longer matches the metrological conditions in the vessel. PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 34 The following submenu points are available: The submenu points are described below. Menu language This menu item enables the setting of the requested national lan- guage. In delivery status, the sensor is set to English. SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 35 In delivery status, the lighting is switched on. 6.4.3 Diagnostics Sensor status In this menu item, the device status is displayed. When the instrument displays a failure message, you can here get detailed information on the failure reason. PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 36 The respective min. and max. measured values are saved in the sensor. The values are displayed in the menu item "Peak values Ad- ditional". This menu item displays the peak values of the electronics tempera- ture as well as the dielectric constant. SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 37 Select the requested simulation variable and set the requested value. Caution: During simulation, the simulated value is output as 4 … 20 mA current value and digital HART signal. PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 38 6.4.4 Additional adjustments Date/Time In this menu item, the internal clock of the sensor is set. Reset After a reset, certain parameter adjustments made by the user are reset. SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 39 Max. adjustment - Level 100 % Distance: 0.000 m(d) - Note dead zones Min. adjustment - Level Distance: Probe length - Note dead zones Max. adjustment - Interface 100 % Distance: 0.000 m(d) - Note dead zones Min. adjustment - Interface Distance: Probe length - Note dead zones Damping - Level 0.0 s Damping - Interface 0.0 s PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 40 Selected language Displayed value 1 Filling height Displayed value 2 Electronics temperature Display format 1 Automatically Display format 2 Automatically Backlight Switched on Menu - Additional adjustments Menu item Default value 0000 Date Actual date SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 41 We recommend to save the instrument adjustments. In case of an electronics exchange the saved parameter adjustment data relieve this process. Scaling level Since scaling is very extensive, scaling of the level value was divided into two menu items. PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 42 Scaling interface - Scal- In menu item "Scaling format" you define the scaling format on the ing format display and the scaling of the measured interface value for 0 % and 100 %. SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 43 The default setting is "Analogue current output" and the address 00. Special parameters In this menu item you gain access to the protected area where you can enter special parameters. In exceptional cases, individual PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 44: Saving The Parameterisation Data

    In the display and adjust- If the instrument is equipped with a display and adjustment module, ment module the parameter adjustment data can be saved therein. The procedure is described in menu item "Copy device settings". SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 45: Setup With Pactware

    Note: For power supply units with integrated HART resistance (inner resist- ance approx. 250 Ω), there is no additional external resistance neces- sary. Standard Ex separators are often provided with a sufficiently high current limitation resistance. In such cases, the modem can be connected in parallel to the 4 … 20 mA cable. PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 46: Parameter Adjustment With Pactware

    Furthermore a tank calculation program as well as a multiviewer for indication and analysis of the saved measured value and echo curves are available. The supplied DVD includes the respective device DTM. How- ever, you can also download the DTM from our homepage www.siemens.com/sitranslg. SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 47: Set Up With The Quick Setup

    Extended adjustment Maintenance Quick setup With quick setup you can carry out the parameter adjustment of SITRANS LG270 for your application in just a few simple steps. The assistant-driven adjustment includes the basic settings for simple, reliable setup and commissioning. Information: If the function is inactive, then possibly no instrument is connected.

  • Page 48: Saving The Parameterisation Data

    Click to the button "Quick setup", to start the assistant-driven adjust- ment for a simplified and reliable setup. Saving the parameterisation data We recommend documenting or saving the parameterisation data via PACTware. That way the data are available for multiple use or service purposes. SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 49: Set Up With Other Systems

    This software is updated via the Internet and new EDDs are automatically accepted into the device catalogue of this software after they are released by the manufacturer. They can then be transferred to a Field Communicator. PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 50: Diagnostics And Servicing

    Up to 500 events are automatically stored with a time stamp in the sensor (non-deletable). Each entry contains date/time, event type, event description and value. Event types are for example: • Modification of a parameter • Switch-on and switch-off times • Status messages (according to NE 107) • Error messages (according to NE 107) The data are read out via a PC with PACTware/DTM or the control system with EDD. SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 51: Status Messages

    Failure: Due to a malfunction in the instrument, a fault message is output. This status message is always active. It cannot be deactivated by the user. Function check: The instrument is being worked on, the measured value is temporarily invalid (for example during simulation). This status message is inactive by default. PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 52 5 min. F113 EMC interference Remove EMC influences Bit 12 of Byte 0 … 5 Communica- Transmission error during ex- Exchange 4-wire power supply tion error ternal communication with unit or electronics 4-wire power supply unit SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 53 Level echo in the close range not Reduce level Bit 9 of available Byte 14 … 24 Overfilling 100 % adjustment: Increase value Check mounting socket Remove possible interfering signals in the close range Use coaxial probe PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 54: Rectify Faults

    The operator of the system is responsible for taking suitable meas- tion occurs ures to rectify faults. The first measures are: Fault rectification • Evaluation of fault messages • Checking the output signal • Treatment of measurement errors SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 55 If the output level is constant, the cause could also be the fault setting of the current output to "Hold value". If the level is too low, the reason could be a line resistance that is too high PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 56 Level echo is no longer detected in the Eliminate false signals in the close range ≥ 100 % or 0 m distance close range due to false signals in the Check installation conditions close range. The sensor goes into over- If possible, switch off the function "Over- fill protection mode. The max. level (0 m fill protection" distance) as well as the status message "Overfill protection" are output. time SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 57: Exchanging The Electronics Module

    Internet (see operating instructions "Electronics module"). Caution: All application-specific settings must be entered again. That's why you have to carry out a fresh setup after exchanging the electronics. If you saved the parameter settings during the first setup of the sen- sor, you can transfer them to the replacement electronics module. A fresh setup is then not necessary. PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 58: Software Update

    Instruments with approvals can be bound to certain software versions. Therefore make sure that the approval is still effective after a software update is carried out. You can find detailed information in the download area on our home- page: www.siemens.com/sitranslg. How to proceed if a repair is necessary If it is necessary to repair the instrument, please contact Siemens. You find the locations on "www.siemens.com/processautomation". SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 59: Dismount

    Pass the instrument directly on to a specialised recycling company and do not use the municipal collecting points. If you have no way to dispose of the old instrument properly, please contact us concerning return and disposal. PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 60: Supplement

    Ʋ Supporting material 316L Ʋ Glass potting Borosilicate glass GPC 540 Ʋ Contacts Alloy C22 (2.4602) Ʋ Helium leak rate < 10 mbar l/s Ʋ Pressure resistance See process pressure of the sensor Process fittings Ʋ Pipe thread, cylindrical (ISO 228 T1) G¾, G1, G1½ (DIN 3852-A) SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 61 Indication value - Display and adjustment module Ʋ Displayed value 1 Filling height Level Ʋ Displayed value 2 Electronics temperature The output values can be assigned individually. The indication values can be assigned individually. PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 62 Water/Oil (dielectric constant ~2.0) Ʋ Mounting Probe end does not touch the vessel bottom Sensor parameter adjustment No gating out of false signals carried out The indication values can be assigned individually. With interface measurement = 2.0 SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 63 Fig. 26: Measuring ranges - SITRANS LG270 Reference plane Probe length Measuring range Upper dead zone (see following diagrams - grey section) Lower dead zone (see following diagrams - grey section) Typical deviation - Interface measure- ± 5 mm (0.197 in) ment Typical deviation - Total level interface...
  • Page 64 " 0,15 m (5.906 " (3.937 ") Fig. 27: Deviation SITRANS LG270 in coax version in water (measurement length up to 1.5 m/4.92 ft) Dead zone (no measurement possible in this area) Probe length 6 mm (0.236 ") -6 mm (-0.236 ")
  • Page 65 " " (3.937 ") 0,05 m (1.968 ") Fig. 30: Deviation SITRANS LG270 in coax version in oil (measurement length up to 6 m/19.69 ft) Dead zone (no measurement possible in this area) Probe length Non-repeatability ≤ ±1 mm Variables influencing measurement accuracy Specifications for the digital measured value Temperature drift - Digital output ±3 mm/10 K relating to the max. measuring range or...
  • Page 66 The measurement error from the process conditions is in the specified pressure and temperature range of below 1 %. Time span after a sudden measuring distance change by max. 0.5 m in liquid applications, max 2 m with bulk solids applications, until the output signal has taken for the first time 90 % of the final value (IEC 61298-2). SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 67 7 … 12 mm 10 … 14 mm – ● ● – ● Brass, nickel- ● ● ● – – plated Stainless – ● ● – ● steel Wire cross-section (spring-loaded terminals) Ʋ Massive wire, stranded wire 0.2 … 2.5 mm² (AWG 24 … 14) PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 68 Ʋ Mounted in the housing without lid IP 40 Materials Ʋ Housing Ʋ Inspection window Polyester foil Functional safety SIL non-reactive Integrated clock Date format Day.Month.Year Time format 12 h/24 h Time zone, factory setting Max. rate deviation 10.5 min/year SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 69 IP66/IP68 (1 bar) Stainless steel (electro-pol- Single chamber IP66/IP68 (0.2 bar) Type 6P ished) Stainless steel (precision Single chamber IP66/IP68 (0.2 bar) Type 6P casting) IP66/IP68 (1 bar) Double chamber IP66/IP68 (0.2 bar) Type 6P IP66/IP68 (1 bar) Galvanic separation between electronics and metal housing parts PBD-51041507 SITRANS LG270 - Operating Instructions...

  • Page 70: Dimensions

    (3.03") M16x1,5 M20x1,5/ ½ NPT M20x1,5/ ½ NPT Fig. 32: Housing versions in protection IP66/IP67 (with integrated display and adjustment module the housing is 9 mm/0.35 in higher) Plastic single chamber Plastic double chamber SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 71 Fig. 34: Housing versions with protection rating IP66/IP68 (0.2 bar), (with integrated display and adjustment mod- ule the housing is 9 mm/0.35 in higher) Stainless steel single chamber (electropolished) Stainless steel single chamber (precision casting) Stainless steel double chamber housing (precision casting) PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 72 SITRANS LG270, coax version (-20 … +250 °C/-4 … +482 °F) SW 41 mm ø 21,3 mm (0.84") Fig. 35: SITRANS LG270, coax version with thread (-20 … +250 °C/-4 … +482 °F) Sensor length, see chapter "Technical data" SITRANS LG270 - Operating Instructions PBD-51041507...

  • Page 73: Trademark

    11.3 Trademark All the brands as well as trade and company names used are property of their lawful proprietor/ originator. PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 74 Electronics and connection compartment 21 Electronics compartment - double chamber Quick setup 26 housing 21 Error codes 53 Event memory 50 Read out info 44 Repair 58 Reset 38 Factory calibration date 44 False signal suppression 33 SITRANS LG270 - Operating Instructions PBD-51041507...
  • Page 75 Scaling measured value 41, 42 Sensor characteristics 44 Sensor status 35 Simulation 37 Special parameters 43 Type label 8 Type of medium 28 Units 28 Vessel insulation 16 PBD-51041507 SITRANS LG270 - Operating Instructions...
  • Page 76 For more information www.siemens.com/level www.siemens.com/weighing Siemens Canada Limited Subject to change without prior notice PD PA PI LW PBD-51041507 Rev. 5.0 1954 Technology Drive P.O. Box 4225 © Siemens AG 2020 Peterborough, ON K9J 7B1, Canada email: techpubs.smpi@siemens.com Printed in Canada www.siemens.com/processautomation...

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