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Interruttore di livello a vibrazione LFV300 Riels Instruments.pdf

Interruttore di livello a vibrazione LFV300 Riels Instruments.pdf
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Interruttore di livello a vibrazione LFV300 Riels Instruments.pdf - 1

UNIVERSAL LIMIT SWITCH FOR LIQUIDS The LFV300 universal limit switch for liquids – rugged and reliable measurement of liquids using the tuning fork principle The level sensors of the Riels LFV300 series are universally usable limit switches that detect predefined filling heights in liquid systems with millimetre-accuracy – even under difficult operating conditions. The 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. The rugged sensor requires no calibration with the medium and operates without wear or maintenance. Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Area of use There 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 LFV300 and its flexible design. A tube-extended variant for vertical mounting with up to 6 metres switching distance to the top of the container is also available – the LFV330. A wide selection of flange, threads and hygienic connections allow customer-specific solutions. The device is suitable for hygienic applications and can be cleaned using SIP and CIP processes. There are also variants for use in potentially explosive atmospheres, to prevent overfilling (in compliance with WHG), and with marine certification. Advantages: - Rugged device design - Flexible concept allows customer - specific solutions, particularly in hygienic areas and Ex-zones - Teaching without filling - Very high reproducibility Level switch for full and empty messages. Vibronic level switch Fault monitoring The electronics module of Riels LFV300 monitors continuously the following criteria: - Strong corrosion or damage on the tuning fork - Loss of vibration - Line break to the piezo drive Type overview Attributes Preferred application Length Process connection Process temperature Process pressure Signal output Liquids Liquids 80… 6000 mm (3.15… 236.22 in) tube extention Thread G¾ A, G1 A, flanges, hygienic fittings Thread G¾ A, G1 A, flanges, hygienic fittings -50… +150°C (-58… +302 °F) -50… +150°C (-58… +302 °F) -50… +250°C (-58… +482 °F) with -50… +250°C (-58… +482 °F) with temperature adapter temperature adapter -1 … 64 bar (-14.5… 928 psi) -1 … 64 bar (-14.5… 928 psi) Relay, transistor, NAMUR output, contactless electronic switch Relay, transistor, NAMUR output, contactless electronic switch

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Interruttore di livello a vibrazione LFV300 Riels Instruments.pdf - 2

Plastic housing Aluminium housing Dimensions LFV310 Temperature adapter - LFV310/330 Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments 1 Thread 2 Tri-Clamp 3 Cone DN 25 4 Bolting DN 40 5 Flange Dimensions LFV330 2 Tri-Clamp 3 Cone DN 25 4 Bolting DN 40 5 Flange L Sensor length, see chapter „Technical data"

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Interruttore di livello a vibrazione LFV300 Riels Instruments.pdf - 3

1. Preparing the connection - Note safety instructions Always keep in mind the following safety instructions: - Connect only in the complete absence of line voltage. Take 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 LVF310/330. Select connection cable for Ex applications. Take note of the corresponding installation regulations for Ex applications. Tutti i dati ed i contenuti di...

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Interruttore di livello a vibrazione LFV300 Riels Instruments.pdf - 4

LFV300 - Wiring plan - NAMUR output Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Technical data Process pressure Process temperature Fili material density Viscosity Materials, non-wetted parts Material, housing Response time Process connection Accuracy Reproducibility Hysteresis switching output Temperature drift Ambient temperature operation Ambient temperature storage Enclosure rating Length (only for LFV330) Simulation key The simulation key is located in a recess on the upper side of the oscillator: Push the simulation key with a suitable...

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Interruttore di livello a vibrazione LFV300 Riels Instruments.pdf - 5

Overfill protection according to WHG ATEX Marine certification Type code LFV 310 Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Process fitting / Material StSt (electropolished) 316L / IP66/IP67 / M20x1.5 StSt (electropolished) 316L / IP66/IP67 / /NPT Electronics Contactless electronic switch 20...250VAC/DC Double relay (DPDT) 20...72VDC/20...250VAC (3A) NAMUR signal Switching point Standard Switching point prolongued 118 mm

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Interruttore di livello a vibrazione LFV300 Riels Instruments.pdf - 6

Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Type code LFV 330 Process fitting / Material

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Interruttore di livello a vibrazione LFV300 Riels Instruments.pdf - 7

Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Switching point In generai, Riels LFV300 can be installed in any position. The instrument simply has be mounted in such a way that the vibrating element is at the height of the desired switching point. The tuning fork has lateral markings (notches) marking the switching point with vertical installation. The 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/cmb (0.016 lbs/in3) are detected...

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Interruttore di livello a vibrazione LFV300 Riels Instruments.pdf - 8

Influence of the product density on the switching point 1 Shifting of the switching point in mm (in) 2 Product 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 Tuning fork Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Influence of the process pressure to the switching point 1 Shifting of the switching point in mm (in) 2 Process pressure in bar (psi) 3 Switching point at reference conditions (notch) 4 Tuning fork Repeatability...

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