PEPPERL plus FUCHS LVL-A7-AG1A-E5V1-CG-EMS Vibration Limit Switch
Function
The Vibracon LVL-A7 is a limit switch for liquids and is used in tanks, vessels and pipes. The device is used for overfill prevention or pump protection in cleaning and filter systems as well as in cooling and lubrication vessels, for instance.
The device is suitable for applications in which float switches or conductive, capacitance and optical sensors have been used up to now. The device also works in areas where these measuring principles are not suitable due to conductivity, buildup, turbulence, flow conditions or air bubbles.
The device can be used for process temperatures up to 100 °C (212 °F).
The device is not suitable for use in hazardous areas.
For hygienic areas we recommend the use of Vibracon LVL A7H.
Connection
Dimensions
Technical Data
| 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 device | |
| 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 protection MIN = minimum safety: The device keeps the electronic switch closed as long as the fork is immersed in liquid. example application: dry running protection of pumps The electronic switch opens if the limit is reached, if a fault occurs or in the event of a power fails (quiescent current principle) |
|
| Series | LVL-A* | |
| Supply | ||
| Connection | This device may be used with any sequential circuit, as long as the circuit can support the electrical circuit values of the switching elements. | |
| Rated voltage | Ur | 10 … 35 V DC |
| Fusing | external 500 mA slow | |
| Current consumption | < 15 mA | |
| Power consumption | 975 mW | |
| Residual ripple
Input Measured variable |
5 V ss at 0 … 400 Hz
density |
|
| Measurement range | min. 0.7 g/cm3 | |
| Output | ||
| Output type | switching output | |
| Switching current
Directive conformity Electromagnetic compatibility |
max. 250 mA | |
| Directive 2014/30/EU | EN 61326-1:2006 , EN 61326-2-3:2006 | |
| Directive 2004/108/EC
Conformity Electromagnetic compatibility |
EN 61326-1:2006 , EN 61326-2-3:2006
NE 21 |
|
| Degree of protection | IEC 60529 | |
| Shock resistance | EN 60068-2-27 | |
| Vibration resistance | EN 60068-2-64 | |
| Climate class
Measurement accuracy Reference operating conditions |
DIN EN 60068-2-38/IEC 68-2-38
– 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 |
|
| Switch-on delay
Operating conditions Installation conditions |
max. 3 s | |
| Installation position see technical information (TI) | |
| Ambient conditions | |
| 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 conditions | |
| Medium temperature | -40 … 100 °C (-40 … 212 °F) |
| Process pressure (static pressure) | -1 … +40 bar (-14.5 … +580 psi) |
| State of aggregation | liquid |
| Density | min. 0.7 g/cm3 |
| Viscosity | 1 … 10000 mPa/s, dynamic viscosity |
| Solid contents | < ∅5 mm |
| Mechanical specifications | |
| Degree of protection | IP65/IP67 , NEMA 4X |
| Connection | M12 connector, 4-pin |
| Material | process connection and short tube: stainless steel 316L (1.4401/1.4435) tuning fork: stainless steel 316L housing cover and connector: PPSU |
| Surface quality | Ra < 3.2 µm |
| Mass | approx. 140 g |
| Process connection Indication and operation Display elements | thread G1/2 to ISO 228
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) |
| Certificates and approvals | |
| CSA approval | cCSAus Listed, General Purpose |
| Overspill protection
General information Supplementary documentation |
see approval (ZE)
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. |
| Accessories | |
| Designation | see technical information (TI) |
Customer Support
Pepperl+Fuchs Group
www.pepperl-fuchs.com
USA: +1 330 486 0002
pa-info@us.pepperl-fuchs.com
Documents / Resources
 |
PEPPERL plus FUCHS LVL-A7-AG1A-E5V1-CG-EMS Vibration Limit Switch [pdf] Owner's Manual 275573-100021, LVL-A7-AG1A-E5V1-CG-EMS Vibration Limit Switch, LVL-A7-AG1A-E5V1-CG-EMS, Vibration Limit Switch, Limit Switch, Switch |
