Set up with other systems ....................47 DD adjustment programs ....................47 Field Communicator 375, 475 ..................47 Diagnostics and servicing ....................48 Maintenance ........................48 Diagnosis memory ......................48 Status messages ......................49 Rectify faults ........................52 PBD-51041071 SITRANS LG270 - Operating Instructions...
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11.3 Dimensions ........................77 11.4 Trademark ........................80 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 manual. Editing status: 2017-09-14 SITRANS LG270 - Operating Instructions PBD-51041071...
This arrow indicates a single action. 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-51041071 SITRANS LG270 - Operating Instructions...
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.
English language. 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 PBD-51041071 SITRANS LG270 - Operating Instructions...
The respective scope of delivery results from the order specification. 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 450 °C (842 °F). Functional principle -...
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Example: upper medium dielectric constant 2, lower medium at least dielectric constant 12. Gas phase (L3) • Air or gas mixture • Gas phase - dependent on the application, gas phase does not always exist (d2 = 0) SITRANS LG270 - Operating Instructions PBD-51041071...
"LG Local Display Interface" (Document-ID 43838). External display and 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. PBD-51041071 SITRANS LG270 - Operating Instructions...
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"Flanges according to DIN-EN-ASME-JIS" (Document-ID 47574). Electronics module The electronics module SITRANS series LG is a replacement part for TDR sensors of SITRANS series LG. There is a different version avail- able for each type of signal output. You can find further information in the operating instructions manual "Electronics module SITRANS series LG". SITRANS LG270 - Operating Instructions PBD-51041071...
Make sure before mounting that all parts of the instrument exposed to conditions the process are suitable for the existing process conditions. These are mainly: • Active measuring component • Process fitting • Process seal Process conditions in particular are: PBD-51041071 SITRANS LG270 - Operating 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-51041071...
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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-51041071 SITRANS LG270 - Operating Instructions...
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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. SITRANS LG270 - Operating Instructions PBD-51041071...
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The prerequisite is constant temperature and pressure in the vessel. Automatic correction via the reference distance The SITRANS LG270 can be equipped optionally with a running time correction via reference distance. The probe can carry out an auto- matic running time correction with it.
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Fig. 8: Measuring ranges - SITRANS LG270 with steam compensation Reference plane Probe length L Measuring range Upper blocking distance with steam compensation Lower dead band Reference measurement distance to steam compensation Length of the reference measuring distance SITRANS LG270 - Operating Instructions...
Max. torque for all housings, see chapter "Technical data". Cable screening and Make sure that the cable screen and grounding are carried out ac- grounding cording to Fieldbus specification. We recommend to connect the cable screen to ground potential on both ends. PBD-51041071 SITRANS LG270 - Operating Instructions...
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 Fig. 9: Connection steps 5 and 6 - Single chamber housing SITRANS LG270 - Operating Instructions PBD-51041071...
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-ia version. PBD-51041071 SITRANS LG270 - Operating Instructions...
For external display and adjustment unit Ground terminal for connection of the cable screen Switch-on phase After SITRANS LG270 is connected to the bus system, the instrument carries out a self-test for approx. 30 seconds. The following steps are carried out: •...
Fig. 14: Insertion of the display and adjustment module with single chamber housing Note: If you intend to retrofit the instrument with a display and adjustment module for continuous measured value indication, a higher lid with an inspection glass is required. SITRANS LG270 - Operating Instructions PBD-51041071...
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-51041071 SITRANS LG270 - Operating Instructions...
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: •...
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In this menu item you can enter the probe length or have the length Setup - Probe length determined automatically by the sensor system. When choosing "Yes", then the probe length will be determined automatically. When choosing "No", you can enter the probe length manually. PBD-51041071 SITRANS LG270 - Operating Instructions...
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This menu item is only available, if you have chosen interface meas- phase urement under the menu item "Application". In this menu item you can enter if there is a superimposed gas phase in your application. SITRANS LG270 - Operating Instructions PBD-51041071...
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Setup - Min. adjustment In this menu item you can enter the min. adjustment for the level. With Level interface measurement this is the minimum total level. PBD-51041071 SITRANS LG270 - Operating Instructions...
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"Application". Enter the requested percentage value for the min. adjustment (inter- face). Enter the respective distance value in m for the interface correspond- ing to the percentage value of the interface. SITRANS LG270 - Operating Instructions PBD-51041071...
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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-51041071 SITRANS LG270 - Operating Instructions...
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For the socket correction you have to enter the height of the socket above the upper edge of the vessel. If the socket is lower than the up- per edge of the vessel, this value can also be negative. SITRANS LG270 - Operating Instructions PBD-51041071...
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Select menu items and show data • Read data from sensor into the display and adjustment module. Caution: When the PIN is active, adjustment via PACTware/DTM as well as other systems is also blocked. PBD-51041071 SITRANS LG270 - Operating Instructions...
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In this menu item, you define the indication of the measured value Display - Displayed value on the display. You can display two different measured values. In this menu item, you define measured value 2. The default setting for the displayed value 2 is the electronics tem- perature. Display - Display format In this menu item, you define the display format of the measured value on the display. You can define different display formats for the two measured values. You can thus define the number of decimal positions the measured value is displayed with. SITRANS LG270 - Operating Instructions PBD-51041071...
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The two values are displayed in the menu item "Peak values, measurement certainty". The measurement can be influenced by the process conditions. In this menu item, the measurement certainty of the level measure- ment is displayed in mV. The higher the value, the more reliable the measurement. PBD-51041071 SITRANS LG270 - Operating Instructions...
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V. The signal strength enables an evalua- tion of the quality of the measurement. With the following functions you can zoom part sections of the echo curve. • "X-Zoom": Zoom function for the meas. distance • "Y-Zoom": 1, 2, 5 and 10x signal magnification in "V" • "Unzoom": Reset the presentation to the nominal measuring range without magnification SITRANS LG270 - Operating Instructions PBD-51041071...
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PACTware. With the adjustment software PACTware and the PC the high-reso- lution echo curve can be displayed and used later on to assess the quality of the measurement. PBD-51041071 SITRANS LG270 - Operating Instructions...
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The following table shows the default values of the instrument. De- pending on the instrument version or application, all menu items may not be available or some may be differently assigned: SITRANS LG270 - Operating Instructions PBD-51041071...
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0 mm Linearisation - Vessel height Probe length Menu - Display Menu Menu item Default value Display Language Selected language Displayed value 1 Filling height Level Displayed value 2 Electronics temperature Backlight Switched on PBD-51041071 SITRANS LG270 - Operating Instructions...
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The following data or settings for adjustment of the display and ad- justment module are saved: • All data of the menu "Setup" and "Display" • In the menu "Additional adjustments" the items "Reset, Date/Time" • Special parameters SITRANS LG270 - Operating Instructions PBD-51041071...
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In this menu item, the date of factory calibration of the sensor as well date as the date of the last change of sensor parameters are displayed via the display and adjustment module or via the PC. PBD-51041071 SITRANS LG270 - Operating Instructions...
If it is necessary to exchange a sensor, the display and adjustment module is inserted into the replacement instrument and the data are likewise written into the sensor via the menu item "Copy device settings". SITRANS LG270 - Operating Instructions PBD-51041071...
DTM. Furthermore, not all described functions are included in older firmware versions. You can download the latest instrument software from our homepage. A description of the update procedure is also available in the Internet. The further setup steps are described in the online help of PACTware and the DTMs. PBD-51041071 SITRANS LG270 - Operating Instructions...
The quick setup is another option for parameter adjustment of the sensor. It allows fast, convenient adjustment of the most important parameters to adapt the sensor quickly to standard applications. To use it, select the function "Quick setup" in the start screen. SITRANS LG270 - Operating Instructions PBD-51041071...
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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.
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-51041071...
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-51041071 SITRANS LG270 - Operating Instructions...
Echo curve of the setup: This is used as reference echo curve for the measurement conditions during setup. Changes in the measure- ment conditions during operation or buildup on the sensor can thus be recognized. The echo curve of the setup is stored via: • PC with PACTware/DTM • Control system with EDD SITRANS LG270 - Operating Instructions PBD-51041071...
This status message is inactive by default. It can be activated by the user via PACTware/DTM or EDD. Maintenance: Due to external influences, the instrument function is limited. The measurement is affected, but the measured value is still valid. Plan in maintenance for the instrument because a failure is expected in the near future (e.g. due to buildup). PBD-51041071 SITRANS LG270 - Operating Instructions...
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Error in the EEPROM bration • • F261 Error during setup Repeat setup Bit 9 • • False signal suppression faulty Repeat reset Error in the in- • Error when carrying out a reset strument settings SITRANS LG270 - Operating Instructions PBD-51041071...
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Remove possible interfering signals in the close range • Use coaxial probe • • S602 Compensation echo superim- 100 % adjustment: Increase value Bit 25 posed by medium Level within the search range, compensation echo PBD-51041071 SITRANS LG270 - Operating Instructions...
Further comprehensive diagnostics options are available with a PC with PACTware and the suitable DTM. In many cases, the reasons can be determined in this way and faults rectified. Treatment of measure- The below tables show typical examples for application-relevant ment errors measurement errors. There are two measurement errors: SITRANS LG270 - Operating Instructions PBD-51041071...
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Echo from the probe end larger Check parameter "Medium" mains in the area of the than the product echo, for exam- and "Vessel height", adapt if bottom during filling ple, with products with ε < 2.5 necessary oil-based, solvents, etc. time PBD-51041071 SITRANS LG270 - Operating Instructions...
The electron- ics modules are adapted to the respective sensor and differ in signal output or voltage supply. The new electronics module must be loaded with the default settings of the sensor. These are the options: SITRANS LG270 - Operating Instructions PBD-51041071...
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 Sie- mens Milltronics Process Instruments. You find the locations on "www.siemens.com/sitranslg". PBD-51041071 SITRANS LG270 - Operating Instructions...
Pass the instrument directly on to a spe- cialised recycling company and do not use the municipal collecting points. These may be used only for privately used products according to the WEEE directive. SITRANS LG270 - Operating Instructions PBD-51041071...
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16 mA, ±0.5 mA Resolution, digital > 1 mm (0.039 in) Accuracy (according to DIN EN 60770-1) Process reference conditions according to DIN EN 61298-1 Ʋ Temperature +18 … +30 °C (+64 … +86 °F) SITRANS LG270 - Operating Instructions PBD-51041071...
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Ʋ Medium 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 With interface measurement = 2.0 PBD-51041071 SITRANS LG270 - Operating Instructions...
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Fig. 30: Measuring ranges - SITRANS LG270 Reference plane Probe length L Measuring range (default setting refers to the measuring range in water) Upper dead band (see following diagrams - grey section) Lower dead band (see following diagrams - grey section) Typical deviation - Interface measure- ±...
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" 0,15 m (5.906 " (3.937 ") Fig. 31: Deviation SITRANS LG270 in coax version in water (measurement length up to 1.5 m/4.92 ft) Dead band (no measurement possible in this area) Probe length 6 mm (0.236 ") -6 mm (-0.236 ")
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") 0,05 m (1.968 ") Fig. 34: Deviation SITRANS LG270 in coax version in oil (measurement length up to 6 m/19.69 ft) Dead band (no measurement possible in this area) Probe length Max. deviation and max. deviating upper blocking distance - version with refer-...
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DIN-EN-ASME-JIS" Process temperature -196 … +280 °C (-321 … +536 °F) 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). PBD-51041071 SITRANS LG270 - Operating Instructions...
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-40°C / -40°F Fig. 36: Ambient temperature - process temperature, standard version Ambient temperature Process temperature (depending on the seal material) Aluminium housing Plastic housing Stainless steel housing, precision casting Stainless steel housing, electropolished SITRANS LG270 - Operating Instructions PBD-51041071...
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2-3.11, permissible temperature range: -60 … +400 °C (-76 … 752 °F) Viscosity - dynamic 0.1 … 500 mPa s (requirement: with density 1) Vibration resistance Ʋ Coax probe 1 g with 5 … 200 Hz according EN 60068-2-6 (vibration at resonance) with tube length 50 cm (19.69 in) PBD-51041071 SITRANS LG270 - Operating Instructions...
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25 mm (0.984 in) with 25 °C (77 °F) Ʋ Diameter approx. 8 mm (0.315 in) Ʋ Colour - Non-Ex version Black Ʋ Colour - Ex-version Blue Display and adjustment module Display element Display with backlight SITRANS LG270 - Operating Instructions PBD-51041071...
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16 … 32 V DC Operating voltage U - illuminated display and adjustment module Ʋ Non-Ex instrument 13.5 … 32 V DC Ʋ Ex-ia instrument - Power supply 13.5 … 17.5 V DC FISCO model PBD-51041071 SITRANS LG270 - Operating Instructions...
Instruments with approvals can have deviating technical data (depending on the version). For such instruments, the corresponding approval documents must be noted. 11.2 Supplementary information Foundation Fieldbus The following table gives you an overview of the instrument versions and the corresponding device When used with fulfilled housing protection IEC 61010-1 SITRANS LG270 - Operating Instructions PBD-51041071...
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PID Control Output Splitter (OS) Signal Characterizer (SC) Integrator Input Selector (IS) Arithmetic (AR) Diagnostics Standard Advanced Performance Function Blocks Instantiable General Information LAS (Link Active Scheduler) Master Capable Number of VCRs (Virtual Communication Re- lationships) PBD-51041071 SITRANS LG270 - Operating Instructions...
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Number and makes it available to additional function blocks on its output. Fig. 41: Schematic presentation function block Discret Input (DI) Function block PID Control The function block "PID Control " is a key component for various tasks in the process automation SITRANS LG270 - Operating Instructions PBD-51041071...
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Optionally the function axis can be exchanged in channel 2 so that the block can be also used in a reverse control loop. PBD-51041071 SITRANS LG270 - Operating Instructions...
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Typical input signals are AI blocks. Selection possibilities are maximum, minimum, mean value, average value and first useful signal. Through parameter combination, the block can be used as rotary switch or as preselection switch for the first useful value. Switch information can be received by other input blocks or the user. Mean value selection is also supported. SITRANS LG270 - Operating Instructions PBD-51041071...
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Fourth order polynomial • Simple HTG compensated level • Fourth order Polynomial Based on PV Fig. 47: Schematic presentation function block Arithmetic Parameter list The following table gives you an overview of the parameters used. PBD-51041071 SITRANS LG270 - Operating Instructions...
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FIRMWARE_VERSION_MAIN Firmware versions major, minor, revision and build PHYSICAL_VALUES Distance, distance unit, distance status, level and status DEVICE_UNITS Distance and temperature units of the instrument APPLICATION_CONFIG Medium type, media, application type, vessel bottom, vessel height LINEARIZATION_TYPE_SEL Type of linearization SITRANS LG270 - Operating Instructions PBD-51041071...
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SIL_MODE EDENVELOPE_CURVE_FIL- Parameters of envelope curve filter, activation of smooth raw value curve EDDETECTION_CURVE_FIL- Parameters of the detection filter, offset threshold value curve EDECHO_COMBINATION Parameters for echo combination, function combine echoes, amplitude difference of combined echoes, position difference of combined echoes LIN_TABLE_A … LIN_ 32 couples of percentage and lin. percentage values TABLE_Q ELECTRONICS_INFORMA- Electronics version TION PBD-51041071 SITRANS LG270 - Operating Instructions...
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Width focusing range, time for opening the focusing range, min. measurement reliability in and outside the focusing range NOISE_DETECTION_INFO Increase of the system noise NOISE_DETECTION_CON- System noise treatment ECHO_MEM_SAVE_CURVE_ TYPE ECHO_MEM_STATE Busy, curve type, error code SITRANS LG270 - Operating Instructions PBD-51041071...
Fig. 49: Housing versions with protection rating IP 66/IP 68 (0.2 bar) - with integrated display and adjustment module the housing is 9 mm/0.35 in higher Aluminium - single chamber Aluminium - double chamber PBD-51041071 SITRANS LG270 - Operating Instructions...
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Fig. 50: Housing versions with protection rating IP 66/IP 68 (0.2 bar) - with integrated display and adjustment module 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) SITRANS LG270 - Operating Instructions PBD-51041071...
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ø 42,2 mm ø 42,2 mm (1.66") (1.66") Fig. 51: SITRANS LG270, threaded version Sensor length, see chapter "Technical data" Temperature version -196 … +280 °C (-321 … 536 °F) Temperature version -196 … +450 °C (-321 … 842 °F) Max.
11.4 Trademark All the brands as well as trade and company names used are property of their lawful proprietor/ originator. SITRANS LG270 - Operating Instructions PBD-51041071...
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Simulation 37 Special parameters 41 Type label 8 Type of medium 28 Units 27 Vessel insulation 16 SITRANS LG270 - Operating Instructions PBD-51041071...