LFV300 UNIVERSAL LIMIT SWITCH FOR LIQUIDS CONTROLLI DI LIVELLO

Transcription

1 L300 UIESL LII SWIH O LIQUIS OOLLI I LIELLO he L300 universal limit switch for liquids rugged and reliable measurement of liquids using the tuning fork principle he level sensors of the iels L300 series are universally usable limit switches that detect predefined filling heights in liquid systems with millimetre-accuracy even under difficult operating conditions. he measurement principle of the oscillating fork reacts to changes in density between the surrounding air and the liquid, and thus operates independently of the tank material, container structures or the liquid involved. he rugged sensor requires no calibration with the medium and operates without wear or maintenance. rea of use here are almost no restrictions to the device s areas of use as a limit switch in tanks, storage and intermediate containers, or to protect pumps from dry-running thanks to the universal measurement principle of the L300 and its flexible design. tube-extended variant for vertical mounting with up to 6 metres switching distance to the top of the container is also available the L330. wide selection of flange, threads and hygienic connections allow customer-specific solutions. he device is suitable for hygienic applications and can be cleaned using SI and I processes. here are also variants for use in potentially explosive atmospheres, to prevent overfilling (in compliance with WHG), and with marine certification. dvantages: - ugged device design - lexible concept allows customer - specific solutions, particularly in hygienic areas and Ex-zones - eaching without filling - ery high reproducibility ault monitoring he electronics module of iels L300 monitors continuously the following criteria: - Strong corrosion or damage on the tuning fork - Loss of vibration - Line break to the piezo drive ype overview Level switch for full and empty messages. ibronic level switch ttributes L310 L330 referred application Length rocess connection rocess temperature rocess pressure Signal output Liquids Liquids mm ( in) tube extention hread G¾, G1, flanges, hygienic fittings hread G¾, G1, flanges, hygienic fittings ( ) ( ) ( ) with ( ) with temperature adapter temperature adapter bar ( psi) bar ( psi) elay, transistor, U output, contactless electronic switch elay, transistor, U output, contactless electronic switch

2 Housing types lastic housing luminium housing Stainless steel imensions L310 emperature adapter - L310/330 imensions L330 1 hread 2 ri-lamp 3 one 25 4 Bolting 40 5 lange 1 hread 2 ri-lamp 3 one 25 4 Bolting 40 5 lange L Sensor length, see chapter echnical data

3 Electrical onnection 1. reparing the connection - ote safety instructions lways keep in mind the following safety instructions: - onnect only in the complete absence of line voltage. ake note of safety instructions for Ex applications In hazardous areas you should take note of the appropriate regulations, conformity and type approval certificates of the sensors and power supply units. In hazardous areas, only use approved cable connections for L310/330. Select connection cable for Ex applications. ake note of the corresponding installation regulations for Ex applications. 2. Wiring plan elay output We recommend connecting L300 in such a way that the switching circuit is open when there is a level signal, line break or failure (safe condition). he relays are always shown in non-operative condition. L300 - oscillator with relay output ontactless electronic switch We recommend connecting L300 in such a way that the switching circuit is open when there is a level signal, line break or failure (safe condition). he contactless electronic switch is always shown in non-operative condition. ransistor output 1 ontrol lamp 2 IL switch for mode adjustment 3 IL switch for sensitivity adjustment L300 - wiring plan - relay output 1 elay output 2 elay output 3 oltage supply We recommend connecting L300 in such a way that the switching circuit is open when there is a level signal, line break or failure (safe condition). he instrument is used to control relays, contactors, magnet valves, warning lights, horns as well as L inputs. L300 - oscillator with transistor output he instrument is used for direct control of relays, contactors, magnet valves, warning lights, horns etc. It must not be operated without an intermediately connected load, because the electronics would be destroyed if connected directly to the mains. It is not suitable for connection to low voltage L inputs. omestic current is temporarily lowered below 1m after switching off the load so that contactors, whose holding current is lower than the constant domestic current of the electronics, are reliably switched off. When L300 is used as part of an overfill protection system according to WHG, also note the regulations of the general type approval. L300 - oscillator with contactless electronic switch 1 ontrol lamp 2 IL switch for mode adjustment 3 IL switch for sensitivity adjustment L300 - wiring plan - output, contactless electronic switch 1 ontrol lamp 2 IL switch for mode adjustment 3 IL switch for sensitivity adjustment L300 transistor output action L300 transistor output action

4 U output L300 - oscillator with U electronics Simulation key he simulation key is located in a recess on the upper side of the oscillator. ush the simulation key with a suitable object (screwdriver, pen, etc.). When the key is pushed, a line break between sensor and processing unit is simulated. he signal lamp on the sensor extinguishes. he measuring system must signal a fault and take on a safe condition when the key is pushed. L300 - Wiring plan - U output U-amplifier 1 ontrol lamp 2 IL switch for characteristics reversal 3 IL switch for sensitivity adjustment 4 Simulation key or connection of the amplifier according to U (IE , E 50227). Keep in mind that downstream connected instruments will be activated during operation. his allows you to check the correct function of the measuring system. haracteristics reversal he characteristics of the U electronics can be reversed with the IL switch. You can choose between falling characteristic curve (switch position max.) and rising characteristic curve (switch position min.). You can thus have the desired current outputted. odes: min. - rising characteristic curve (High current when immersed) max. - falling characteristics (Low current when immersed) he U-output can be switched to falling or rising characteristics. or applications according to WHG, the IL switch must be set to position max.. echnical data rocess pressure rocess temperature ill material density iscosity aterials, non-wetted parts aterial, housing esponse time rocess connection ccuracy eproducibility Hysteresis switching output emperature drift mbient temperature operation mbient temperature storage Enclosure rating Length (only for L330) Output load Switching output Signal voltage HIGH Signal voltage LOW Output current I 1 64 bar (optional 250 ) > 0, g/cm mas (Optional a < 0,8 μm) luminium, plastic, stainless steel 500 ms G ¾, G1, flange, triclamp, pipe connection I (further see type code) ± 2 mm ± 1 mm 2 mm 0,03 mm/k I66/67 or I66/I68 (0.2bar) 80mm mm tube extension Electronic (ersion ) Electronic (ersion ) ransistor output U 3 < 1 < 300 m ontactless electronic switch < 400 m apacitive load Inductive load Supply voltage esidual ripple urrent consumption Initialization time rotection class 100 n 1 H < 10 m < 2 s 100 n 1 H / < 4.2 m < 3 s Electronic (ersion ) Electronic (ersion ) Switching output Output current I elay output >10u; <3, 1 amur output 1m / 2,5m Output load apacitive load Inductive load Supply voltage urrent consumption Initialization time rotection class W W ; m < 2 s 4, m / 2,5m < 2 s

5 pprovals Overfill protection according to WHG E arine certification E II 1G, 1/2G, 2G EEx ia II 6 E II 1/2G, 2G EEx ia II 6 GL ype code L 310 L310 pproval without approval Overfill protection acc. to WHG E II 1G, 1/2G, 2G EEx ia II 6 + WHG E II 1/2G, 2G EEx d II 6 + WHG E II 1G, 1/2G,2G EEx ia II 6 + marine certification E II 1/2G,2G EEx d II 6 + marine certification arine certification rocess fitting / aterial hread G¾ 64 / 316L hread ¾ 64 / 316L hread G1 64 / 316L hread 1 64 / 316L ri-lamp 1 16 / 316L a<0.3μm ri-lamp 1 16 / 316L a<0.8μm ri-lamp 2 16 / 316L a<0.3μm ri-lamp 2 16 / 316L a<0.8μm Bolting I11851 / 316L a<0,3μm Bolting I11851 / 316L a<0,8μm arivent / 316L a<0,8μm -lange 40/316L ZB3007 lange orm, I 2501 / 316L lange orm, I 2501 / 316L lange orm,i 2501/ 316L lange orm,i 2501/ 316L lange 1 150lb, SI B16.5 / 316L lange 2 150lb, SI B16.5 / 316L others on request dapter / rocess temperature without / with / Housing lastic I66/67 / 20x1.5 lastic I66/67 / ½ lastic I66/67 / lug 12x1 (4-pin) lastic I66/67 / lug 12x1 (5-pin) lastic I66/67 / lug 12x1(5-pin; E50044) lastic I66/67 / lug 12x1(4-pin; E50044) luminium I66/I67 / 20x1.5 luminium I66/I67 / ½ luminium I66/67 / lug 12x1 (4-pin) StSt (electropolished) 316L / I66/I67 / 20x1.5 StSt (electropolished) 316L / I66/I67 / ½ G G B B E I W Y U Z 8 9 Electronics ontactless electronic switch / ouble relay () / (3) ransistor (/) U signal Switching point Standard Switching point prolongued 118 mm L

6 ype code L 330 L330 pproval without approval Overfill protection acc. to WHG E II 1G, 1/2G, 2G EEx ia II 6 + WHG E II 1/2G, 2G EEx d II 6 + WHG E II 1G, 1/2G,2G EEx ia II 6 + marine certification E II 1/2G,2G EEx d II 6 + marine certification arine certification rocess fitting / aterial hread G¾ 64 / 316L hread ¾ 64 / 316L hread G1 64 / 316L hread 1 64 / 316L ri-lamp 1 16 / 316L a<0.3μm ri-lamp 1 16 / 316L a<0.8μm ri-lamp 2 16 / 316L a<0.3μm ri-lamp 2 16 / 316L a<0.8μm ipe connection 4040 I11851 / 316L a<0,3μm ipe connection 4040 I11851 / 316L a<0,8μm arivent / 316L a<0,8μm -lange 40/316L ZB3007 lange 2540 orm, I 2501 / 316L lange 5040 orm, I 2501 / 316L lange 4040 orm,i 2501/316L lange 8040 orm,i 2501/316L lange 1 150lb, SI B16.5 / 316L lange 2 150lb, SI B16.5 / 316L others on request dapter / rocess temperature without / with / Housing lastic I66/67 / 20x1.5 lastic I66/67 / ½ lastic I66/67 / lug 12x1 (4-pin) lastic I66/67 / lug 12x1 (5-pin) lastic I66/67 / lug 12x1(5-pin; E50044) lastic I66/67 / lug 12x1(4-pin; E50044) luminium I66/I67 / 20x1.5 luminium I66/I67 / ½ luminium I66/67 / lug 12x1 (4-pin) StSt (electropolished) 316L / I66/I67 / 20x1.5 StSt (electropolished) 316L / I66/I67 / ½ Electronics G G B B E I W Y U Z 8 9 ontactless electronic switch / ouble relay () / (3) ransistor (/) U signal Length min. 80mm max. 6000mm

7 ounting instructions Switching point In general, iels L300 can be installed in any position. he instrument simply has be mounted in such a way that the vibrating element is at the height of the desired switching point. he tuning fork has lateral markings (notches) marking the switching point with vertical installation. he switching point refers to the medium water with basic setting of the density switch 0.7g/cm³ (0.025 lbs/in³). Keep in mind that foams with a density > 0.45 g/cm³ (0.016 lbs/in³) are detected by the sensor. Inflowing medium If L300 is mounted in the filling stream, unwanted mismeasurements may result. ount L300 at a location in the vessel where no disturbing influence from e.g. filling openings, agitators, etc. can occur. lows o minimise flow resistance caused by the tuning fork, L300 should be mounted in such a way that the surfaces of the blades are parallel to the product movement. Socket he vibrating element should protrude into the vessel to avoid build-up. or that reason, avoid using mounting bosses for flanges and screwed fittings. his applies particularly for horizontal installation and with adhesive products. gitators ue to agitators, vibrations or similar, the level switch can be subjected to strong lateral forces. or this reason, do not use an overly long extension tube for L330, but check if you can mount a L200 or L310 level switch on the side of the vessel in horizontal position. Extreme vibration caused by the process or the equipment, e.g. agitators or turbulence in the vessel, can cause the extension tube of L300 to vibrate in resonance. his leads to increased stress on the upper weld joint. Should a longer tube version be necessary, you can provide a suitable support or guy directly above the vibrating element to secure the extension tube. easuring accuracy eviation: ±1 mm (0.04 in) his measure applies particularly to applications in Ex areas. ake sure that the tube is not subjected to bending forces through this measure. Influence of the process temperature on the switching point 1 Shifting of the switching point in mm (in) 2 rocess temperature in ( ) 3 Switching point at reference conditions (notch) 4 uning fork

8 Influence of the product density on the switching point 1 Shifting of the switching point in mm (in) 2 roduct density in g/cm³ (lb/in³) 3 Switch position 0.5 g/cm³ (0.018 lb/in³) 4 Switch position 0.7 g/cm³ (0.025 lb/in³) 5 Switching point at reference conditions (notch) 6 uning fork Influence of the process pressure to the switching point epeatability Hysteresis Switching delay requency 0.1 mm (0.004 in) approx. 2 mm (0.08 in) with vertical installation approx. 500 ms (on/off) approx Hz 1 Shifting of the switching point in mm (in) 2 rocess pressure in bar (psi) 3 Switching point at reference conditions (notch) 4 uning fork mbient temperature - roduct temperature 1 roduct temperature 2 mbient temperature 3 emperature range with temperature adapter