Endress+Hauser Liquiphant FTL31 Manual
Point level switch
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- Operating instructions manual (40 pages) ,
- Operating instructions manual (56 pages)
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TI01147F/00/EN/02.14
71267728
Products
Technical Information
Liquiphant FTL31
Vibronic
Point level switch for liquids
Application
The Liquiphant FTL31 is a point level switch for liquids and is used in tanks, vessels
and pipes.
It is used for overfill prevention or pump protection in cleaning and filter systems as
well as in cooling and lubrication vessels, for instance.
Ideal for applications in which float switches or conductive, capacitance and optical
sensors have been used up to now. The Liquiphant FTL31 also works in areas where
these measuring principles are not suitable due to conductivity, buildup, turbulence,
flow conditions or air bubbles.
The Liquiphant FTL31 can be used for process temperatures up to:
• 100 °C (212 °F)
• 150 °C (302 °F)
Not suitable for hazardous areas.
The use of the Liquiphant FTL33 is recommended for hygiene areas.
Your benefits
• Operational safety, reliability and universal application thanks to the tuning fork
measuring principle
• Robust stainless steel housing (316L)
• External function test with test magnet
• Onsite function check possible thanks to LED indication
• Compact design for easy installation even in confined conditions or hard-to-access
areas
Solutions
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Table of Contents
Related Manuals for Endress+Hauser Liquiphant FTL31
Summary of Contents for Endress+Hauser Liquiphant FTL31
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Page 1: Technical Information
Vibronic Point level switch for liquids Application The Liquiphant FTL31 is a point level switch for liquids and is used in tanks, vessels and pipes. It is used for overfill prevention or pump protection in cleaning and filter systems as well as in cooling and lubrication vessels, for instance. -
Page 2: Table Of Contents
Liquiphant FTL31 Table of contents Document information ..... . . 3 Process ........17 Document conventions . -
Page 3: Document Information
Liquiphant FTL31 Document information Document conventions Safety symbols Symbol Meaning DANGER! DANGER This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in serious or fatal injury. A0011189-EN WARNING! WARNING This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in serious or fatal injury. -
Page 4: Function And System Design
Function and system design Measuring principle A piezoelectric drive causes the tuning fork of the Liquiphant FTL31 to vibrate at its resonance frequency. When the tuning fork is immersed in a liquid, its intrinsic frequency changes due to the change in density of the surrounding medium. The electronics system in the point level switch monitors the resonance frequency and indicates whether the tuning fork is vibrating in air or is covered by liquid. -
Page 5: Input
Liquiphant FTL31 Input Measured variable Density Measuring range > 0.7 g/cm³ (optionally available: > 0.5 g/cm³) Output Switch output Switching behavior: On/Off Function 3-wire DC-PNP: Positive voltage signal at the switch output of the electronics (PNP), switching capacity 200 mA... -
Page 6: Electrical Connection
Liquiphant FTL31 Electrical connection Two electronic versions and three different connections are available for the device. A fine-wire fuse is necessary for operation: 500 mA slow-blow. Cable entry A0020928 Valve plug (M16x1.5; NPT ½"; QUICKON) M12 connector Cable 5 m (16 ft); 10 m (33 ft), captive when delivered, cannot be dismantled Cable specification •... -
Page 7: Electronic Version 3-Wire Dc-Pnp
Liquiphant FTL31 Electronic version 3-wire DC- 3-wire DC-PNP is preferably used in conjunction with programmable logic controllers (PLC), DI modules as per EN 61131-2. Positive signal at the switch output of the electronics (PNP). Voltage source: non-hazardous contact voltage or Class 2 circuit (North America). - Page 8 Liquiphant FTL31 Valve plug, cable Depending on the assignment of the connector or the wiring of the cable, the device works in either the MAX or MIN operating mode. Electrical connection Operating mode Valve plug – – 0.5A 0.5A L–...
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Page 9: Electronic Version 2-Wire Ac/Dc
Liquiphant FTL31 Electronic version 2-wire The load is switched via an electronic switch directly in the power supply circuit. Always connect in series with a load! AC/DC Not suitable for connection to low-voltage PLC inputs! Selection tool for relays 207 230 253 A0023486 ... -
Page 10: Overvoltage Protection
Liquiphant FTL31 Valve plug, cable Depending on the assignment of the connector or the wiring of the cable, the device works in either the MAX or MIN operating mode. When the cable is wired, one wire of the cable does not have any function in each of the operating modes (brown in the case of MIN, and gray in the case of MAX). -
Page 11: Performance Characteristics
Liquiphant FTL31 Performance characteristics Reference operating Ambient temperature: +25 °C (+77 °F) conditions Process pressure: 1 bar (14.5 psi) Fluid: Water (density: approx. 1 g/cm³, viscosity 1 mm Medium temperature: 25 °C (77 °F) Density setting: > 0.7 g/cm³ Switching time delay: Standard (0.5 s, 1 s) -
Page 12: Installation
Liquiphant FTL31 Installation Orientation The point level switch can be installed in any position in a vessel, pipe or tank. Foam formation does not affect the function. A0023118 2 Installation options Overfill prevention or upper level detection Lower level detection... - Page 13 (Applies for process connections G 1" weld-in adapter for flush-mounted installation, MNPT 1" and R 1") A0022122 Dimensions mm (in) Liquiphant FTL31 with short tube Liquiphant FTL260 Switch point Installation in pipes During installation, pay attention to the position of the fork in order to minimize turbulence in the pipe.
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Page 14: Length Of Connecting Cable
Liquiphant FTL31 Installation in vessels If installed horizontally, pay attention to the position of the tuning fork to ensure that the liquid can drip off easily. The electrical connection, e.g. M12 connector, should be pointing down with the cable. This can prevent moisture from penetrating. -
Page 15: Environment
Liquiphant FTL31 Environment Ambient temperature range –40 to +70 °C (–40 to +158 °F) [°F] [°C] +158 +122 –40 –40 [°C] –40 +100 [°F] –40 +122 +212 +176 A0022002 5 Derating curve: 100 °C (212 °F) : 200 mA (DC-PNP), 250 mA (AC/DC) -
Page 16: Degree Of Protection
Electromagnetic compatibility in accordance with all relevant requirements of the EN 61326 series compatibility and NAMUR recommendation EMC (NE21). For details, refer to the EC Declaration of Conformity. The EC Declaration of Conformity is available in the Download Area of the Endress+Hauser website: www.endress.com: • Select your country from the menu bar •... -
Page 17: Process
Liquiphant FTL31 Process Process temperature range –40 to +100 °C (–40 to +212 °F) –40 to +150 °C (–40 to +302 °F) Process pressure range Max. –1 to +40 bar (–14.5 to +580 psi) Density > 0.7 g/cm³ (optionally available: > 0.5 g/cm³) -
Page 18: Mechanical Construction
Liquiphant FTL31 Mechanical construction Design Various versions of the point level switch are available, the features of which can be selected to suit your user needs. The versions can be selected via the product structure in the Product Configurator, see the "Ordering information"... -
Page 19: Connector
Liquiphant FTL31 Connector Dimensions Dimensions mm (in) The following graphics illustrate the connectors together with the suitable housing covers on the housing of the point level switch. Electrical connection with housing cover Designation 40 (1.6) 45 (1.8) Valve plug M16, NPT ½"... - Page 20 Liquiphant FTL31 Sensor type Dimensions Dimensions mm (in) The total dimensions of the device can vary depending on the connector selected. To determine the total dimensions, please refer also to the "Electrical connection" section (→ 19). Information on the following tables •...
- Page 21 Liquiphant FTL31 Dimensions Version Description Thread ISO 228 G 1" 129.7 (5.11)** • Material: 316L 105.1 (4.14)* • Scope of delivery: flat seal (FA) • Pressure and temperature (maximum): 66.4 (2.6) +40 bar (+580 psi) at +150 °C (+302 °F) 38 (1.5)
- Page 22 Liquiphant FTL31 Dimensions Version Description Thread ASME MNPT ½" 129.7 (5.11)** Thread ASME MNPT ¾" 105.1 (4.14)* 63.9 (2.52) Thread EN10226 R ½" 47.9 (1.89) Thread EN10226 R ¾" 38 (1.5) Pressure and temperature (maximum): +40 bar (+580 psi) at +150 °C (+302 °F) The dimensions apply for MNPT ½", MNPT ¾";...
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Page 23: Tuning Fork
Liquiphant FTL31 Pay attention to the temperature and pressure specifications for seals used at the customer site. Endress+Hauser supplies DIN/EN process connections with threaded connection in stainless steel in accordance with AISI 316L (DIN/EN material number 1.4404 or 14435). With regard to their stability-temperature property, the materials 1.4404 and 1.4435 are grouped together... -
Page 24: Operability
Liquiphant FTL31 Operability LED display A0016856 M12 connector, (cable without graphic) Valve plug Item Function Description Green LED (gn) Device is operational M12 connector Indicates the sensor state: tuning fork is covered by liquid Yellow LED (ye) Valve plug / cable Indicates the switching state: •... -
Page 25: Certificates And Approvals
• ROHS-compliant in accordance with Endress+Hauser regulation Pressure Equipment The Liquiphant FTL31 does not fall within the scope of Pressure Equipment Directive 97/23/EC as it Directive does not have a pressurized housing as defined in Article 1, Section 2.1.4 of the directive. -
Page 26: Ordering Information
• Automatic verification of exclusion criteria • Automatic creation of the order code and its breakdown in PDF or Excel output format • Ability to order directly in the Endress+Hauser Online Shop Services (optional) In addition, the following services can be selected via the product structure in the Product Configurator: •... -
Page 27: Accessories
Liquiphant FTL31 Accessories Weld-in adapter Various weld-in adapters are available for installation in vessels or pipes. The adapters are optionally available with inspection certificate 3.1 EN10204. View (example) Description G ¾" ø29 pipe installation ø50 vessel installation FDA-listed materials as per 21 CFR Part 175-178 G 1"... -
Page 28: Additional Accessories
Liquiphant FTL31 Additional accessories Socket wrench for mounting Description Order number • Hexagonal 52010156 • Size across flats AF32 A0022273 Test magnet Description Order number Information is available on (→ 24) 71267011 A0021732 Endress+Hauser... -
Page 29: Supplementary Documentation
Liquiphant FTL31 Supplementary documentation The following document types are also available in the Download Area of the Endress+Hauser website: www.endress.com → download Liquiphant FTL31 → BA01285F/00/EN Operating Instructions TI00426F/00/EN → weld-in adapter and flanges (overview) Additional documentation SD00352F/00/A6 → weld-in adapter G 1", G ¾" (installation instructions) SD00356F/00/EN →... - Page 32 *71267728* 71267728 www.addresses.endress.com...
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