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PBD-51041388

SITRANS LG250 - Operating Instructions

46201-EN-150424

SITRANS LG250, rod version

L

SW 36 (1.42") (G¾, ¾ NPT)

SW 41 (1.61") (G1, 1 NPT)

SW 46 (1.81") (G1½, 1½ NPT)

G¾, ¾ NPT,

G1, 1 NPT,

G1½, 1½ NPT

22 mm (0.87")

46 mm  (1.81")

ø 8 mm

(0.32")

L

30mm (1.18")

ø 12¨mm

(0.47")

SW 55 

(2.17")

51 mm  (2.01")

G1½, 1½ NPT

1

2

Fig. 51: SITRANS LG250, threaded version
L  Sensor length, see chapter "Technical data"

1  Rod version ø 8 mm (0.315 in)

2  Rod version ø 12 mm (0.472 in)

Summary of Contents for SITRANS LG250

Page 1: ...Operating Instructions 03 2014 Guided Wave Radar SITRANS LG250 4 20 mA HART two wire Rod and cable probe With SIL qualification ...

Page 2: ...2 PBD 51041388 SITRANS LG250 Operating Instructions 46201 EN 150424 ...

Page 3: ...ctions 13 4 2 Mounting instructions 13 5 Connecting to power supply 5 1 Preparing the connection 21 5 2 Connection 22 5 3 Wiring plan single chamber housing 23 5 4 Wiring plan double chamber housing 23 5 5 Double chamber housing with DIS ADAPT 24 5 6 Wiring plan Ex d ia double chamber housing 25 5 7 Supplementary electronics 26 5 8 Switch on phase 26 6 Functional safety SIL 6 1 Objective 28 6 2 SI...

Page 4: ...ectronics module 68 10 6 Exchanging the cable rod 69 10 7 Software update 71 10 8 How to proceed if a repair is necessary 71 11 Dismount 11 1 Dismounting steps 72 11 2 Disposal 72 12 Supplement 12 1 Technical data 73 12 2 Dimensions 84 Safety instructions for Ex areas Please note the Ex specific safety information for installation and op eration in Ex areas These safety instructions are part of th...

Page 5: ...nts of this manual should be made available to these personnel and put into practice by them 1 3 Symbols used Information tip note This symbol indicates helpful additional information Caution If this warning is ignored faults or malfunctions can result Warning If this warning is ignored injury to persons and or serious damage to the instrument can result Danger If this warning is ignored serious i...

Page 6: ... the art instrument complying with IEC 61508 and all prevailing regulations and guidelines The instrument must only be operated in a technically flawless and reliable condition The operator is responsible for the trouble free operation of the instrument During the entire duration of use the user is obliged to determine the compliance of the necessary occupational safety measures with the current v...

Page 7: ...fication of the safety requirements multiple SIL levels are specified according to safety standard IEC 61508 You can find detailed information in chapter Functional safety SIL The instrument meets the specifications of IEC 61508 2010 Edi tion 2 It is qualified for single channel operation up to SIL2 The instrument can be used homogeneously redundant up to SIL3 in multi channel architecture with HF...

Page 8: ...mber of the instrument 12 Symbol of the device protection class 13 ID numbers instrument documentation 14 Reminder to observe the instrument documentation 15 Notified authority for CE marking 16 Approval directives 17 Marking of the safety function in SIS This operating instructions manual applies to the following instrument versions Hardware from 1 0 0 Software from 1 0 0 DTM from version 1 67 2 ...

Page 9: ...strumented systems SIS The safety function SIF can be a monitoring of the max or min level or a combination of both High frequency microwave pulses are guided along a steel cable or a rod Upon reaching the product surface the microwave pulses are reflected The running time is evaluated by the instrument and output ted as level d h 1 Fig 2 Level measurement 1 Sensor reference plane seal surface of ...

Page 10: ...n find a list of dielectric constants on our home page www siemens com sitranslg The composition of the upper medium must be stable no varying products or mixtures The upper medium must be homogeneous no stratifications within the medium Min thickness of the upper medium 50 mm 1 97 in Clear separation from the lower medium emulsion phase or detri tus layer max 50 mm 1 97 in If possible no foam on ...

Page 11: ...eft closed and stored according to the orientation and storage markings on the outside Unless otherwise indicated the packages must be stored only under the following conditions Not in the open Dry and dust free Not exposed to corrosive media Protected against solar radiation Avoiding mechanical shock and vibration Storage and transport temperature see chapter Supplement Technical data Ambient con...

Page 12: ... 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 If you are using an instrument with rod version you can extend the rod probe individually with curved segments and rod extensions of different lengths All extensions used must not exceed a total length of 6 m 19 7 ft The extensions ...

Page 13: ...nds or close the openings with suitable blind plugs The suitable cable glands and blind plugs come with the instrument Make sure that all parts of the instrument exposed to the process in particular the active measuring component process seal and process fitting are suitable for the existing process conditions These include above all the process pressure process temperature as well as the chemical...

Page 14: ...n screwing it in Make sure that the plate has direct contact with the process fitting When installing rod or cable probes in vessels without metal walls e g in plastic vessels the measured value can be influenced by strong electromagnetic fields emitted interference according to EN 61326 class A In this case use a probe with coaxial version 1 2 Fig 5 Installation in non metallic vessel 1 Flange 2 ...

Page 15: ...rocedure h d d h DN40 DN150 DN150 DN200 150 100 _ _ Fig 6 Mounting socket When welding the socket make sure that the socket is flush with the vessel top 1 2 Fig 7 Socket must be installed flush 1 Unfavourable installation 2 Socket flush optimum installation Before beginning the welding work remove the electronics module from the sensor By doing this you avoid damage to the electronics through indu...

Page 16: ...temperature The max permissible pressure is specified in chapter Technical data or on the type label of the sensor Standpipes or bypass tubes are normally metal tubes with a diameter of 30 200 mm 1 18 7 87 in Up to a diameter of 80 mm 3 15 in such a tube corresponds to a coax measuring probe Lateral inlets in bypass tubes do not influence the measurement Measuring probes can be mounted in bypass t...

Page 17: ...avoid contact with the tube wall In the case of cable probes the cable can be strained Keep in mind that buildup can form on the spacers Strong buildup can influence the measurement 1 2 3 h Fig 9 Mounting in a bypass tube Position of the spacer or the centering weight 1 Rod probe with spacer PEEK 2 Cable probe with centering weight 3 Spacer PEEK on the gravity weight of a cable probe h Measurable ...

Page 18: ...ndpipes up to DN 200 10 mm 0 39 10 mm 0 39 ø 150 200 mm 5 91 7 87 ø 150 200 mm 5 91 7 87 h 1 2 A B 3 Fig 10 Mounting in a standpipe 1 Holes for mixing 2 Standpipe vertically mounted max deviation 10 mm 0 4 in 3 Ventilation opening A Rod probe with spacer steel B Cable probe with centering weight For standpipes select the probe length such that the upper blocking distance dead band of the probe is ...

Page 19: ...e Measurement in a standpipe is not recommended for extremely adhesive products In case of slight buildup you should choose a standpipe with bigger diameter Instructions for the measurement The 100 point with standpipes should be below the upper ventilation hole The 0 point in standpipes should be above the gravity or center ing weight A false signal suppression with installed sensor is generally ...

Page 20: ...e actual probe length when using bow shaped segments If installations such as struts ladders etc exist on the vessel wall then the probe should have a distance to the vessel wall of at least 300 mm 11 81 in You can find further information in the supplementary instructions of the rod extension In case of difficult installation conditions for example in a socket the probe can be adapted respectivel...

Page 21: ...es of EN 61326 1 for industrial areas screened cable should be used Use cable with round cross section for instruments with housing and cable gland To ensure the seal effect of the cable gland IP protection rating find out which cable outer diameter the cable gland is suitable for Use a cable gland fitting the cable diameter With plastic housing the NPT cable gland or the Conduit steel tube must b...

Page 22: ...or with instruments with external electronics via the screen of the special connection cable You can find specifications on the potential connections inside the instrument in chapter Technical data 5 2 Connection The voltage supply and signal output are connected via the spring loaded terminals in the housing Connection to the display and adjustment module or to the interface adapter is carried ou...

Page 23: ...he seal ring must completely encircle the cable 10 Screw the housing lid back on The electrical connection is finished Information The terminal block is pluggable and can be removed from the electronics To do this lift the terminal block with a small screwdriver and pull it out When reinserting the terminal block you should hear it snap in 5 3 Wiring plan single chamber housing The following illus...

Page 24: ...l display and adjustment unit is not pos sible with this double chamber housing 5 1 2 6 7 8 4 20mA Display 2 3 4 1 Fig 15 Connection compartment double chamber housing 1 Voltage supply Signal output 2 For display and adjustment module or interface adapter 3 Ground terminal for connection of the cable screen 5 5 Double chamber housing with DIS ADAPT 3 4 1 2 Fig 16 Top view of the plug connector 1 P...

Page 25: ...4 20mA Fig 17 Electronics compartment double chamber housing 1 Internal connection to the terminal compartment 2 For display and adjustment module or interface adapter 3 Internal connection to the plug connector for external display and adjust ment unit optional 4 20mA 1 2 2 1 Fig 18 Connection compartment with double chamber housing Ex d 1 Voltage supply Signal output 2 Ground terminal for connec...

Page 26: ...upply The additional current output II cannot be used in safety instrument ed systems according to SIL 1 2 I 4 20mA I I 4 20mA 7 8 3 1 2 Fig 20 Terminal compartment double chamber housing supplementary elec tronics additional current output 1 Current output I Voltage supply of the sensor and signal output with HART 2 Additional current output II Voltage supply and signal output without HART 3 Grou...

Page 27: ...t loop name on the display or PC Indication of the status message F 105 Determine measured value on the display or PC The output signal jumps to the set fault current As soon as a plausible measured value is found the corresponding current is outputted to the signal cable The value corresponds to the actual level as well as the settings already carried out e g factory setting ...

Page 28: ...alification When developing instruments that can be used in safety instrument ed systems the focus is on avoiding systematical errors as well as determining and controlling random errors Here are the most important characteristics and requirements from the perspective of functional safety according to IEC 61508 Edi tion 2 Internal monitoring of safety relevant circuit parts Extended standardizatio...

Page 29: ...tment with PACTware and DTM To prevent unintentional or unauthorized adjustment the set param eters must be protected from unauthorized access For this reason the instrument is shipped in locked condition The PIN in delivery status is 0000 When shipped with a specific parameter adjustment the instruments are accompanied by a list with the values deviating from the basic setting All safety relevant...

Page 30: ... and thus unsafe status Warning In case of a reset to basic settings all safety relevant parameters will also be reset to default Therefore all safety relevant parameters must be checked or readjusted 6 5 Setup process Operating sequence A parameter change with SIL qualified instruments must always be carried out as follows Unlock adjustment Change parameters Lock adjustment and verify modified pa...

Page 31: ...50 with a suitable multi meter and compare the measured output current with the calculated output current If you have to interrupt the function you can leave the SITRANS LG250 in the respective situation As long as SITRANS LG250 is powered the display and adjustment module remains in the currently set adjustment menu To interrupt the function test you have to push the button ESC If you carry out t...

Page 32: ...com pare the measured value Result In all cases the output current must correspond to the respective level For this purpose you have to measure for all levels the current output and compare the values with the calculated current values You have to determine the permissible deviation of the values yourself This deviation depends on the the accuracy requirements of your measurement loop Determine th...

Page 33: ...d by 90 3 Press the display and adjustment module onto the electronics and turn it to the right until it snaps in 4 Screw housing cover with inspection window tightly back on Disassembly is carried out in reverse order The display and adjustment module is powered by the sensor an ad ditional connection is not necessary Fig 21 Insert display and adjustment module Note If you intend to retrofit the ...

Page 34: ...nguage 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 After switching on the SITRANS LG250 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 informati...

Page 35: ...are and software version date of manu facture instrument features Note For optimum adjustment of the measuring point the individual sub menu items in the main menu item Setup should be selected one after the other and provided with the correct parameters If possible go through the items in the given sequence The procedure is described below The following submenu points are available The submenu po...

Page 36: ... the key you change the sign and with the 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 In this menu item you select the distance unit and the temperature unit For the distance units you can choose between m mm and ft and for the temperature units C F and K In this menu ...

Page 37: ...nstration purposes and must not be used in a safety instrumented application SIL In this menu item you can define the type of medium product This menu item is only available if you have selected level measure ment under the menu item Application You can choose between the following medium types Dielectric con stant Type of medium Examples 10 Water based liq uids Acids alcalis water 3 10 Chemical m...

Page 38: ...he max adjustment for the level With interface measurement this is the maximum total level Adjust the requested percentage value with and store with OK Enter the appropriate distance value in m corresponding to the percentage value for the full vessel The distance refers to the sensor reference plane seal surface of the process fitting Keep in mind that the max level must lie below the dead band I...

Page 39: ... interface measurement If you select Yes the current setting will be displayed If you have selected No you can enter the adjustment for the inter face separately Enter the requested percentage value For the full vessel enter the distance value in m matching the per centage value This menu item is only available if you have selected interface meas urement under the menu item Application If you have...

Page 40: ...me The linearization applies to the measured value indication and the current output By activating the appropriate curve the volume per centage of the vessel is displayed correctly If the volume should not be displayed in percent but e g in l or kg a scaling can be also set in the menu item Display Warning If a linearisation curve is selected the measuring signal is no longer necessarily linear to...

Page 41: ...height h Positive socket correction value h Negative socket correction value Since scaling is very extensive scaling of the level value was divided into two menu items In menu item Level 1 you define the scaling variable and the scaling unit for the level value on the display e g volume in l Setup Scaling Level Setup Scaling Level 1 ...

Page 42: ...scaling unit for the interface value on the display e g volume in l You can accept the scaling of the level measurement also for the interface measurement If you select Yes the current setting is displayed If you have selected No you can enter the scaling for the interface separately In menu item Interface 2 you define the scaling format on the display and the scaling of the interface measured val...

Page 43: ...lementary electronics with an additional current output is implemented in the instrument you can adjust the additional current output separately In menu item Current output 2 you specify which measured value the additional current output refers to The additional current output cannot be used as an output in the sense of a safety instrumented application SIL The procedure corresponds to the previou...

Page 44: ...lues you have to use the adjustment software PACTware HART functions are not relevant for SIL applications The following circumstances cause interfering reflections and can influence the measurement High sockets Vessel installations such as struts Note A false signal suppression detects marks and saves these false signals so that they are no longer taken into account for the level and interface me...

Page 45: ... avoid possible errors during parameterization in a non safe user environment a verification procedure is used that makes it possible to detect parameterization errors reliably For this safety relevant parameters must be verified before they are stored in the device In normal operating condition the instrument is also locked against parameter changes through unauthorized access For this reason the...

Page 46: ...ine the permissible deviation of the values yourself This deviation depends on the the accuracy requirements of your measurement loop Determine the permissible tolerance for the deviation If you have to interrupt the function you can leave the SITRANS LG250 in the respective situation As long as SITRANS LG250 is powered the display and adjustment module remains in the currently set adjustment menu...

Page 47: ...ed subsequently and provided with the correct parameters to ensure the optimum adjustment of the display options The procedure is described in the following The following submenu points are available The submenu points described below This menu item enables the setting of the requested national lan guage In the delivery status the sensor is set to the ordered national lan guage In this menu item y...

Page 48: ...played in addition to the peak values of the level measurement In another window you can carry out a reset of the two peak values separately The respective min and max measured values are saved in the sensor 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 l...

Page 49: ...ho curve shows the signal strength of the echoes over the measuring range in 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 magnificati...

Page 50: ...th this you can detect signal changes over the operating time With the adjustment software PACTware and the PC the high resolution echo curve can be displayed and used to compare the echo curve of the setup with the actual echo curve The function Echo curve memory enables storing echo curves of the measurement Under the sub menu item Echo curve memory you can store the current echo curve Parameter...

Page 51: ...he following reset functions are available Delivery status Restoring the parameter settings at the time of ship ment from the factory incl the order specific settings A created false signal suppression user programmable linearization curve as well as the measured value memory will be deleted Basic settings Resetting of the parameter settings incl special parameters to the default values presetting...

Page 52: ...obe length take dead band into account Accept adjustment of the level measurement Yes Max adjustment Interface 100 Max adjustment Interface Distance 0 000 m d note block ing distances Min adjustment Interface 0 Min adjustment Interface Distance Probe length take dead band into account Integration time Level 0 0 s Integration time Interface 0 0 s Linearization type Linear Linearization Socket corre...

Page 53: ...rrent output Max 20 5 mA Third HART variable TV Measurement certainty level Fourth HART variable QV Electronics temperature Display Menu item Default value Modified value Language Order specific Displayed value 1 Filling height Level Displayed value 2 Electronics temperature Backlight Switched on Diagnostics Menu item Default value Modified value Status signals Function control Switched on Status ...

Page 54: ...ngs 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 The copied data are permanently saved in an EEPROM memory in the display and adjustment module and remain there even in case of power failure From there they can be written into one or more sen sors or kept as back...

Page 55: ... current output and the address 00 In this menu you read out the instrument name and the instrument serial number In this menu item the hardware and software version of the sensor is displayed In this menu item the date of factory calibration of the sensor as well as the date of the last change of sensor parameters are displayed via the display and adjustment module or via the PC In this menu item...

Page 56: ...t module in the menu item Copy sensor data The data remain there permanently even if the sensor power supply fails 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 settings the items Distance unit tem perature unit and linearization The values of the user programmable linearization curve The ...

Page 57: ...nsor via the interface adapter 1 USB cable to the PC 2 Interface adapter 3 Sensor 1 3 2 5 4 Fig 25 Connecting the PC via HART to the signal cable 1 Sensor 2 HART resistance 250 Ω optional depending on processing 3 Adapter cable for HART modem 4 Processing system PLC Voltage supply 5 HART modem Via the interface adapter directly on the sensor Connection via HART ...

Page 58: ...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 Fig 26 Example of a DTM view The device DTM includes an assistant for simple project configuration simplifying the adjustment considerably You can save and print your project documentation as well ...

Page 59: ...50 Operating Instructions 46201 EN 150424 8 3 Saving the parameter adjustment data We recommend documenting or saving the parameter adjustment data via PACTware That way the data are available for multiple use or service purposes ...

Page 60: ...ce Description EDD are available for DD adjustment programs such as for example AMS and PDM 9 2 Communicator 375 475 Device descriptions for the instrument are available as DD or EDD for parameter adjustment with the Field Communicator 375 or 475 A free of charge download of these files is available via Internet Move via www vega com and Downloads to Software ...

Page 61: ...afety Manual SIL 10 2 Diagnosis memory The instrument has several memories which are available for diagno sis purposes The data remain even with voltage interruption Up to 100 000 measured values can be stored in the sensor in a ring memory Each entry contains date time as well as the respective measured value Storable values are for example Distance Filling height Percentage value Lin percent Sca...

Page 62: ...s are divided into the following categories Failure Due to a malfunction in the instrument a failure message is outputted This status message is always activated and cannot be deactivated Function check The instrument is in operation the measured value is temporarily invalid for example during simulation This status mes sage is always activated and cannot be deactivated by the user Out of specific...

Page 63: ...ion table Delete create a new lineari zation table F036 No operable software Failed or interrupted soft ware update Repeat software update Check electronics version Exchanging the electronics Send instrument for repair F040 Error in the electronics Hardware defect Exchanging the electronics Send instrument for repair F041 Probe loss Cable probe broken or rod probe defective Check probe and exchang...

Page 64: ...age briefly F266 Impermissi ble operating voltage Operating voltage below specified range Check electrical connection If necessary increase operating voltage F267 No executable sensor soft ware Sensor cannot start Exchanging the electronics Send instrument for repair The following table shows the error codes and text messages in the status message Function check and provides information on causes ...

Page 65: ...ed range Check electrical connection If necessary increase operating voltage The following table shows the error codes and text messages in the status message Maintenance and provides information on causes as well as corrective measures Code Text mes sage Cause Rectification M500 Error in the delivery sta tus With the reset to delivery status the data could not be restored Repeat reset Load XML fi...

Page 66: ...t measures to be taken are to check the output signal as well as to evaluate the error messages via the display and adjustment module Further comprehensive diagnostics can be carried out on a PC with the software PACTware and the suitable DTM In many cases the causes can be determined this way and faults rectified Connect a handmultimeter in the suitable measuring range according to the wiring pla...

Page 67: ...t setting of the current output to Hold value If the level indication is too low the reason could be a line resist ance that is too high Measurement error with constant level Fault description Error pattern Cause Rectification 1 Measured value shows a too low or too high level Level time 0 Min max adjustment not correct Adapt min max adjustment Incorrect linearization curve Adapt linearization cur...

Page 68: ...ted Eliminate false signals in the close range Check installation conditions If possible switch off the func tion Overfill protection Measurement error during emptying Fault description Error pattern Cause Rectification 7 Measured value re mains unchanged in the close range during emptying Level time 0 False signal larger than the level echo Level echo too small Eliminate false signals in the clos...

Page 69: ...tronics module A new setup is no more necessary After the new setup and the transfer of the parameterization date you have to verify the parameters Only then the instrument will be ready for operation again 10 6 Exchanging the cable rod If necessary the cable or rod measuring part of the probe can be exchanged Loosen the rod or cable with a fork wrench wrench size 7 rod ø 8 cable ø 2 and 4 or wren...

Page 70: ... requested length with mounted measuring rod 2 Cable Loosen the pins on the gravity weight hexagon 3 3 Cable remove the pins 4 Cable Pull the cable out of the gravity weight 5 Shorten the cable rod with a cut off wheel or metal saw at the marking Take note of the specifications in the following illustration when shortening the cable 6 Cable with gravity weight Shift the cable according to the draw...

Page 71: ...r Voltage supply HART modem PC with PACTware Current sensor software as file You can find the actual sensor software as well as detailed infor mation of the procedure in the download area on our homepage www siemens com sitranslg You can find information about the installation in the download file Caution Instruments with approvals can be bound to certain software versions Therefore make sure that...

Page 72: ...panies We use recyclable materials and have designed the parts to be easily separable Correct disposal avoids negative effects on humans and the environ ment and ensures recycling of useful raw materials Materials see chapter Technical data If you have no way to dispose of the old instrument properly please contact us concerning return and disposal WEEE directive 2002 96 EG This instrument is not ...

Page 73: ...ty weight optionally available 316L Ʋ Ʋ Centering weight optionally available 316L Materials non wetted parts Ʋ Ʋ Plastic housing plastic PBT Polyester Ʋ Ʋ Aluminium die casting housing Aluminium die casting AlSi10Mg powder coated basis Polyester Ʋ Ʋ Stainless steel housing precision casting 316L Ʋ Ʋ Stainless steel housing electropol ished 316L Ʋ Ʋ Second line of defence optional Borosilicate gla...

Page 74: ... 250 g 8 04 oz Ʋ Ʋ Centering weight ø 75 mm 2 953 in 825 g 26 52 oz Ʋ Ʋ Centering weight ø 95 mm 3 74 in 1050 g 33 76 oz Probe length L from seal surface Ʋ Ʋ Rod ø 8 mm 0 315 in up to 6 m 19 69 ft Ʋ Ʋ Rod ø 12 mm 0 472 in up to 6 m 19 69 ft Ʋ Ʋ Trimming accuracy rod 1 mm 0 05 of the rod length Ʋ Ʋ Cable ø 2 mm 0 079 in up to 75 m 246 1 ft Ʋ Ʋ Cable ø 4 mm 0 157 in up to 75 m 246 ft Ʋ Ʋ Trimming ac...

Page 75: ... probes εr 1 6 Ʋ Ʋ Rod probes εr 1 6 2 4 5 3 2 4 5 3 1 1 Fig 38 Measuring ranges SITRANS LG250 1 Reference plane 2 Probe length L 3 Measuring range default setting refers to the measuring range in water 4 Upper dead band see diagrams under Accuracy grey section 5 Lower dead band see diagrams under Accuracy grey section Output variable Output signal 4 20 mA HART Range of the output signal 3 8 20 5 ...

Page 76: ... passive Range of the output signal 3 8 20 5 mA default setting Signal resolution 0 3 µA Failure signal current output adjustable Last valid measured value 21 mA 3 6 mA Max output current 21 5 mA Starting current 10 mA for 20 ms after switching on 3 6 mA Load Load resistor see chapter Voltage supply Damping 63 of the input variable adjustable 0 999 s Indication value DIsplay and adjustment module3...

Page 77: ... deviation Total level interface measurement See following diagrams Typical deviation Level measurement5 6 See following diagrams L 0 2 mm 0 079 2 mm 0 079 15 mm 0 591 10 mm 0 394 0 3 m 11 811 0 08 m 3 15 0 02 m 0 787 1 Fig 39 Deviation SITRANS LG250 in rod version in water 1 Dead band no measurement possible in this area L Probe length 4 With interface measurement 2 0 5 Depending on the installat...

Page 78: ... m 1 97 0 07 m 2 756 1 1 Fig 40 Deviation SITRANS LG250 in rod version in oil 1 Dead band no measurement possible in this area L Probe length 0 2 mm 0 079 2 mm 0 079 15 mm 0 591 10 mm 0 394 0 08 m 3 15 0 3 m 11 811 0 1 m 3 94 L 1 Fig 41 Deviation SITRANS LG250 in cable version in water 1 Dead band no measurement possible in this area L Probe length ...

Page 79: ...urement possible in this area L Probe length 0 15 mm 0 591 2 mm 0 079 2 mm 0 079 15 mm 0 591 0 3 m 11 811 0 15 m 5 906 0 15 m 5 906 20 mm 0 787 0 05 m 1 969 1 1 L Fig 43 Deviation SITRANS LG250 in cable version ø 4 mm 0 157 in in oil 1 Dead band no measurement possible in this area L Probe length Repeatability 1 mm Specifications of the safety tolerance SIL See Safety Manual Variables influencing ...

Page 80: ...e resulting deviation for some typical gases and vapours The specified values refer to the distance Positive values mean that the measured distance is too large negative values that the measured distance is too small Gas phase Temperature Pressure 1 bar 14 5 psig 10 bar 145 psig 50 bar 725 psig Air 20 C 68 F 0 0 22 1 2 200 C 392 F 0 01 0 13 0 74 400 C 752 F 0 02 0 08 0 52 Hydrogen 20 C 68 F 0 01 0...

Page 81: ...sure stage see supplementary instructions manual Flanges ac cording to DIN EN ASME JIS Process temperature thread or flange temperature Ʋ Ʋ PPS GF 40 40 80 C 40 176 F Ʋ Ʋ FKM SHS FPM 70C3 GLT 40 150 C 40 302 F Ʋ Ʋ EPDM A P 75 5 KW75F 40 150 C 40 302 F Ʋ Ʋ Silicone FEP coated A P FEP O SEAL 40 150 C 40 302 F Ʋ Ʋ FFKM Kalrez 6375 20 150 C 4 302 F Ʋ Ʋ FFKM Kalrez 6375 with tempera ture adapter 20 200...

Page 82: ...nce with rod length 50 cm 19 69 in Shock resistance Ʋ Ʋ Instrument housing 100 g 6 ms according to EN 60068 2 27 mechanical shock Ʋ Ʋ Rod probe 25 g 6 ms according to EN 60068 2 27 mechanical shock with rod length 50 cm 19 69 in Electromechanical data version IP 66 IP 67 and IP 66 IP 68 0 2 bar Cable entry Ʋ Ʋ M20 x 1 5 1 x cable gland M20 x 1 5 cable ø 6 12 mm 1 x blind plug M20 x 1 5 Ʋ Ʋ NPT 1 x...

Page 83: ...nt module Ʋ Ʋ Non Ex instrument Ex d instrument 16 35 V DC Ʋ Ʋ Ex ia instrument 16 30 V DC Ʋ Ʋ Ex d ia instrument 20 35 V DC Reverse voltage protection Integrated Permissible residual ripple Non Ex Ex ia instrument Ʋ Ʋ Frequency 16 400 Hz Ʋ Ʋ for 12 V UN 18 V 0 7 Veff Ʋ Ʋ for 18 V UN 35 V 1 0 Veff Permissible residual ripple Ex d ia instrument Ʋ Ʋ Frequency 16 400 Hz Ʋ Ʋ for 18 V UN 35 V 1 0 Veff ...

Page 84: ... 67 IP 66 IP 68 0 2 bar NEMA 4X NEMA 6P Overvoltage category III9 Protection class III10 Approvals Instruments with approvals can have deviating technical data depending on the version For such instruments the corresponding approval documents must be noted 12 2 Dimensions Plastic housing 69 mm 2 72 ø 77 mm 3 03 114 mm 4 49 M20x1 5 NPT 86 mm 3 39 M16x1 5 114 mm 4 49 M20x1 5 NPT ø 77 mm 3 03 1 2 Fig...

Page 85: ... is 9 mm 0 35 in higher 1 Single chamber version 2 Double chamber version Stainless steel housing 69 mm 2 72 ø 77 mm 3 03 119 mm 4 69 M20x1 5 NPT 59 mm 2 32 ø 80 mm 3 15 112 mm 4 41 M20x1 5 NPT 90 mm 3 54 ø 84 mm 3 31 123 mm 4 84 M20x1 5 NPT M16x1 5 3 2 1 Fig 48 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 hig...

Page 86: ...1 1 NPT G NPT G1 1 NPT G1 1 NPT 22 mm 0 87 46 mm 1 81 100 mm 3 94 50 mm 1 97 ø 16 mm 0 63 ø 4 mm 0 16 ø 4 mm 0 16 ø 16 mm 0 63 ø 16 mm 0 63 100 mm 3 94 ø 20 mm 0 79 ø 20 mm 0 79 ø 20 mm 0 79 ø 2 mm 0 08 96 mm 3 78 22 mm 0 87 L Fig 49 SITRANS LG250 threaded version with gravity weight all gravity weights with thread M8 for eye bolt L Sensor length see chapter Technical data ...

Page 87: ...NPT SW 41 1 61 G1 1 NPT SW 46 1 81 G1 1 NPT G NPT G1 1 NPT G1 1 NPT 22 mm 0 87 46 mm 1 81 ø 4 mm 0 16 30 mm 1 18 X 30 mm 1 18 X ø 2 mm 0 08 1 2 Fig 50 SITRANS LG250 threaded version L Sensor length see chapter Technical data x ø 40 mm 1 57 in ø 45 mm 1 77 in ø 75 mm 2 95 in ø 95 mm 3 74 in 1 Cable version ø 2 mm 0 079 in with centering weight see supplementary instructions Centering 2 Cable versio...

Page 88: ...2 G NPT SW 41 1 61 G1 1 NPT SW 46 1 81 G1 1 NPT G NPT G1 1 NPT G1 1 NPT 22 mm 0 87 46 mm 1 81 ø 8 mm 0 32 L 30 mm 1 18 ø 12 mm 0 47 SW 55 2 17 51 mm 2 01 G1 1 NPT 1 2 Fig 51 SITRANS LG250 threaded version L Sensor length see chapter Technical data 1 Rod version ø 8 mm 0 315 in 2 Rod version ø 12 mm 0 472 in ...

Page 89: ...89 PBD 51041388 SITRANS LG250 Operating Instructions 46201 EN 150424 12 3 Trademark All the brands as well as trade and company names used are property of their lawful proprietor originator ...

Page 90: ... curve of the setup 50 EDD Enhanced Device Description 60 Electronics and terminal compartment single chamber housing 23 Electronics compartment with double chamber housing 24 Event memory 61 F Factory calibration date 55 False signal suppression 44 Fault rectification 66 Functional principle 9 Functional safety SIL 28 Function test 30 46 G Gas phase 37 Grounding 21 H HART address 55 HART variable...

Page 91: ...module 12 Rod extension 12 Spacer 12 Reset 51 S Scaling measured value 41 42 Sensor characteristics 55 Sensor status 48 Shielding 21 SIL 28 Simulation 49 Special parameters 55 Status messages 62 Storage 11 T Type label 8 Type of medium 36 U Units 36 Unlock adjustment 45 V Verify parameter 32 Voltage supply 21 ...

Page 92: ...25 Peterborough ON Canada K9J7B1 email techpubs smpi siemens com www siemens com processautomation Subject to change without prior notice PBD 51041388 Rev 1 0 Siemens AG 2015 For more information www siemens com level www siemens com weighing Printed in Canada ...

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