倍加福

LVL-A7

LVL-A7 Vibration Limit Switch

订货号: 275573
产品分类: 振动限位开关

Vibration Limit Switch

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TECHNICAL DATA

规格参数

General specifications

Measuring method	The tuning fork is brought to its resonance frequency by means of a piezoelectric drive. If the tuning fork is covered by liquid, this frequency changes. The electronics monitor the resonance frequency and indicate whether the tuning fork is freely vibrating or is covered by liquid.
Construction type	compact devicedevice with short tube
Operating mode	MAX = maximum safety:The device keeps the electronic switch closed as long as the liquid level is below the fork.example application: overspill protectionMIN = minimum safety:The device keeps the electronic switch closed as long as the fork is immersed in liquid.example application: dry running protection of pumpsThe electronic switch opens if the limit is reached, if a fault occurs or in the event of a power fails (quiescent current principle)
Series	Vibracon LVL-A7
Rated voltage	- DC-PNP: 10 ... 35 V DC, 3-wire- AC/DC: 20 ... 253 V AC/DC, 2-wire
Current consumption	- DC-PNP: < 15 mA- AC/DC: < 3.8 mA
Power consumption	- DC-PNP: < 975 mW- AC/DC: < 850 mW
Measured variable	density
Measuring range	min. 0.7 g/cm3, optional> 0.5 g/cm3
Output type	switching output
Switching current	max. 250 mA
Electromagnetic compatibility	Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2006 , EN 61326-2-3:2006	Directive 2014/30/EUEN 61326-1:2006 , EN 61326-2-3:2006
Low voltage	Low voltage
Directive 2014/35/EUEN 61010-1:2010	Directive 2014/35/EUEN 61010-1:2010
Directive 2014/30/EU	EN 61326-1:2006 , EN 61326-2-3:2006
Directive 2014/35/EU	EN 61010-1:2010
Electromagnetic compatibility	NE 21
Degree of protection	IEC 60529
Shock resistance	EN 60068-2-27
Vibration resistance	EN 60068-2-64
Climate class	DIN EN 60068-2-38/IEC 68-2-38
Reference operating conditions	- ambient temperature: 25 °C (+77 °F)- process pressure: 1 bar (14.5 psi)- fluid: water (density: approx. 1 g/cm3, viscosity: 1 mm2/s)- medium temperature: 25 °C (+77 °F)- density setting: > 0.7 g/cm3- switching time delay: standard (0,5 s, 1 s)
Measured value resolution	< 0.5 mm
Measuring frequency	approx. 1100 Hz in air
Switching point	13 mm ± 1 mm
Non-repeatability	± 1 mm acc. to DIN 61298-2
Hysteresis	max. 3 mm
Influence of ambient temperature	negligible
Influence of medium temperature	-25 µm/°C
Influence of medium pressure	-20 µm/bar
Switching time	- 0.5 s when tuning fork is covered- 1.0 s when tuning fork is uncovered- other switching times on request
Installation conditions	Installation conditions
Installation positionsee section mounting position	Installation positionsee section mounting position
Ambient conditions	Ambient conditions
Ambient temperature-40 ... 70 °C (-40 ... 158 °F)Storage temperature-40 ... 85 °C (-40 ... 185 °F)Shock resistancea = 300 m/s2 = 30 g, 3 planes x 2 directions x 3 shocks x 18 ms, as per test EaVibration resistancea(RMS) = 50 m/s2, ASD = 1.25 (m/s2)2/Hz, f = 5 to 2000 Hz, t = 3 x 2 h	Ambient temperature-40 ... 70 °C (-40 ... 158 °F)Storage temperature-40 ... 85 °C (-40 ... 185 °F)Shock resistancea = 300 m/s2 = 30 g, 3 planes x 2 directions x 3 shocks x 18 ms, as per test EaVibration resistancea(RMS) = 50 m/s2, ASD = 1.25 (m/s2)2/Hz, f = 5 to 2000 Hz, t = 3 x 2 h
Process conditions	Process conditions
Process temperature-40 ... +100 °C (-40 ... +212 °F)-40 ... +150 °C (-40 ... +302 °F)Process pressure (static pressure)-1 ... +40 bar (-14.5 ... +580 psi)State of aggregationliquidDensitymin. 0.7 g/cm3, optional> 0.5 g/cm3Viscosity1 ... 10000 mPa/s, dynamic viscositySolid contents< ∅5 mm	Process temperature-40 ... +100 °C (-40 ... +212 °F)-40 ... +150 °C (-40 ... +302 °F)Process pressure (static pressure)-1 ... +40 bar (-14.5 ... +580 psi)State of aggregationliquidDensitymin. 0.7 g/cm3, optional> 0.5 g/cm3Viscosity1 ... 10000 mPa/s, dynamic viscositySolid contents< ∅5 mm
Installation position	see section mounting position
Ambient temperature	-40 ... 70 °C (-40 ... 158 °F)
Storage temperature	-40 ... 85 °C (-40 ... 185 °F)
Shock resistance	a = 300 m/s2 = 30 g, 3 planes x 2 directions x 3 shocks x 18 ms, as per test Ea
Vibration resistance	a(RMS) = 50 m/s2, ASD = 1.25 (m/s2)2/Hz, f = 5 to 2000 Hz, t = 3 x 2 h
Process temperature	-40 ... +100 °C (-40 ... +212 °F)-40 ... +150 °C (-40 ... +302 °F)
Process pressure (static pressure)	-1 ... +40 bar (-14.5 ... +580 psi)
State of aggregation	liquid
Density	min. 0.7 g/cm3, optional> 0.5 g/cm3
Viscosity	1 ... 10000 mPa/s, dynamic viscosity
Solid contents	< ∅5 mm
Degree of protection	- IP65/IP67, NEMA 4X enclosure (plug M12)- IP65, NEMA 4X enclosure (valve plug)- IP65/68, NEMA 4X/6P enclosure (cable)
Connection	- cable 5 m- valve plug NPT1/2- valve plug QUICKON- valve plug M16- plug M12
Material	see technical information (TI)
Surface quality	Ra < 3.2 µm
Mass	see technical information (TI)
Dimensions	see technical information (TI)
Process connection	- thread ISO 228 G1/2, G3/4, G1- thread EN 10226 R1/2, R3/4, R1- thread ASME MNPT1/2, MNPT3/4, MNPT1
Display elements	The LED display is on the connection side.- green LED: indication of ready to operate- red LED: fault indication- yellow LED: operating mode indication
Function test	function test with test magnet (optional accessory)
Overspill protection	Z-65.11-554 (overspill protection acc. to WHG)Z-65.40-555 (leak detection system acc. to WHG) If you need the approvals also in paper form, select the option WH in the type code.
Supplementary documentation	technical information (TI) manual (BA) approval (ZE)
Supplementary information	Statement of Conformity, Declaration of Conformity, Attestation of Conformity and instructions have to be observed where applicable. For information see www.pepperl-fuchs.com.
Designation	see technical information (TI)

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资料与附件

产品数据表 Datasheet

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