Endress+Hauser Liquipoint T Series Technical Information

Endress+Hauser Liquipoint T Series Technical Information

Level limit switch for multiple point detection in conductive liquids

Advertisement

Technical Information
TI 375F/00/en
Level Limit Detection in Liquids
liquipoint T FTW 31, FTW 32
Level limit switch for multiple point detection
in conductive liquids
Applications
Liquipoint T sensors are used in
conductive liquids (as of 10 µS/cm) for
determining level limits.
Depending on the number of measuring
points (up to 5 rods or ropes), measuring
tasks such as overspill protection, dry
running protection, two-point control of
pumps or multiple point detection can be
implemented for an existing process
connection.
Your benefits
Detect up to five level limits with one
probe
Two-point control and additional
maximum and minimum detection
Option between rod or rope version for
optimum adaptation to the application
Flexible instrumentation:
– with built-in electronic insert, either
transistor or relay output for 2 or
3 rod/rope probes
– for connection to a separate
transmitter power supply unit
No calibration required;
standard setting for the most common
conductive liquids
No moving parts in the tank:
– long service life
– reliable operation with no wear or
blockages
WHG approval
Four measuring ranges can be set
100 Ω, 1 kΩ, 10 kΩ, 100 kΩ
Cost-effective probe for conductive
liquids
Electronic inserts for:
– NAMUR output
– Relais output
– Transistor output

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Liquipoint T Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Summary of Contents for Endress+Hauser Liquipoint T Series

  • Page 1 Level Limit Detection in Liquids Technical Information TI 375F/00/en liquipoint T FTW 31, FTW 32 Level limit switch for multiple point detection in conductive liquids Applications Liquipoint T sensors are used in conductive liquids (as of 10 µS/cm) for determining level limits. Depending on the number of measuring points (up to 5 rods or ropes), measuring tasks such as overspill protection, dry...
  • Page 2: Table Of Contents

    Liquipoint T FTW 31, FTW 32 Table of contents Function and system design ....3 Certificates and approvals ....23 Measuring principle .
  • Page 3: Function And System Design

    Liquipoint T FTW 31, FTW 32 Function and system design Measuring principle An alternating voltage exists between the rod probes in an empty tank. As soon as the conductive liquid in the tank creates a connection between the ground probe rod and, for example, the maximum probe rod, a measurable current flows and the Liquipoint T switches.
  • Page 4 Liquipoint T FTW 31, FTW 32 Probes without integrated electronic insert (separate-instrument version) for one or two point detection respectively The measuring system consists of: • FTW 31, FTW 32 with two/three rods or ropes • Nivotester FTW 325 or FTW 470 Z •...
  • Page 5: Input

    Liquipoint T FTW 31, FTW 32 Input Measured variable Resistance change between two conductors caused by the presence or absence of a conductive product. Measuring range The measuring range is dependent on the mounting location of the probes. (application) Rod probes can have a max. length of 4000 mm and rope probes up to 15 000 mm. Input signal Probes covered =>...
  • Page 6: Electronic Insert Few 54 (Relay)

    Liquipoint T FTW 31, FTW 32 Measuring ranges A total of four measuring ranges (100 Ω; 1 kΩ; 10 kΩ; 100 kΩ) can be set via two DIL switches (SENS). The setting on delivery is 100 kΩ. 100 Ω 10 kΩ Ω...
  • Page 7 Liquipoint T FTW 31, FTW 32 Fail-safe mode Selecting the correct fail-safe mode ensures that the relay always runs in quiescent current fail-safe. • Maximum fail-safe: the relay de-energises when the switch point is exceeded (probe covered), a fault occurs or the power supply fails. •...
  • Page 8: Electronic Insert Few 58 (Namur)

    Liquipoint T FTW 31, FTW 32 Electronic insert FEW 58 Output signal (NAMUR) For connecting to isolating amplifiers acc. to NAMUR (IEC 60947-5-6) Output signal jump from high to low current on limit (H-L-edge). Fail-safe Level Output signal LEDs circuit 2.2 …...
  • Page 9: Power Supply

    Liquipoint T FTW 31, FTW 32 Power supply Electrical connection Compact instrumentation with FEW 52 (wiring diagrams) Transistor circuit for load The load connected to terminal 3 is switched by a transistor, contactless and therefore without bouncing. In normal switching status, terminal 3 has a positive signal. The transistor is blocked in the event of a level alarm or a power failure.
  • Page 10 Liquipoint T FTW 31, FTW 32 Compact instrumentation with FEW 54 Relay contact circuit for load The connected load is switched via potential-free relay contacts (change-over contact). In the event of a level alarm or a power failure, the relay contacts break the connections between terminals 3 and 4 and terminals 6 and 7.
  • Page 11 Liquipoint T FTW 31, FTW 32 Compact instrumentation with FEW 58 To be used with isolating amplifiers acc. to NAMUR (IEC 60947-5-6) Output signal jump from high to low current on limit (H-L-edge). Signal transmission on a two-wire line: H-L-edge 2.2 ... 6.5 mA / 0.4 ... 1.0 mA When using a multiplex the cycle time must be set to a minimum of 2 s.
  • Page 12 Liquipoint T FTW 31, FTW 32 Separate instrumentation for two-rod or two-rope probes with cable monitoring FTW 325 FTW 470 Z L00-FTW3xxxx-04-05-xx-en-003 *1 Printed circuit board for cable monitoring The power supply and evaluation are provided by switching units, e.g. Nivotester FTW 325 or FTW 470 Z Separate instrumentation for three-rod or three-rope probes with cable monitoring FTW 325 FTW 470 Z...
  • Page 13: Cable Entry

    Liquipoint T FTW 31, FTW 32 Separate instrumentation for five-rod or five-rope probes with cable monitoring Master (M) / Slave (S) ∆s ∆s FTW 325 FTW 325 L00-FTW3xxxx-04-05-xx-en-004 *1 Printed circuit board for cable monitoring The power supply and evaluation are provided by switching units, e.g. Nivotester FTW 325 or FTW 470 Z Cable entry M 20x1.5 •...
  • Page 14: Accuracy With Built-In Electronic Insert

    Liquipoint T FTW 31, FTW 32 Accuracy with built-in electronic insert • Reference operating Ambient temperature: 23 °C conditions • Medium temperature: 23 °C • Medium viscosity: medium must release the probe again (drain off). • Medium pressure p : 0 bar •...
  • Page 15 Liquipoint T FTW 31, FTW 32 Orientation Rod probes (Dimensions in mm) Level limit detection for standard applications in tanks made of plastic or metal. L00-FTW3xxxx-11-05-xx-xx-002 Vertical mounting, minimum detection; Probe length set to the level limit required; Rods must not come into contact with the tank. Vertical mounting, maximum detection;...
  • Page 16 Liquipoint T FTW 31, FTW 32 Example applications Level limit detection (standard applications) ∆s ∆s L00-FTW3xxxx-15-05-xx-xx-002 ∆ Two-point control ( s) e.g. pump control Level limit detection (standard applications) L00-FTW3xxxx-15-05-xx-xx-003 Level limit detection (MAX), ∆ maximum and minimum detection for compact-instrument devices only possible with Endress + Hauser...
  • Page 17: Environment

    Liquipoint T FTW 31, FTW 32 Environment Ambient temperature Non-hazardous area range –40 ... 70 °C –40 ... 60 °C (for FEW 58 NAMUR) Storage temperature –40 ... 80 °C Climate class Tropicalised as per DIN EEC 68, part 2-38 Degree of protection IP66 Shock resistance...
  • Page 18: Mechanical Construction

    Liquipoint T FTW 31, FTW 32 Mechanical construction Design, dimensions Rod and rope version with G 1 1/2" (compact-instrument version with electronic insert) FTW 31 FTW 32 ø85 ø85 max. 76 max. 76 AF 55 AF 55 G 1½ G 1½ ø5 ø2,5 ø4...
  • Page 19 Liquipoint T FTW 31, FTW 32 Rod and rope version with NPT 1 1/2" (compact-instrument version with electronic insert) FTW 31 FTW 32 ø85 ø85 max. 76 max. 76 AF 55 AF 55 NPT 1½ NPT 1½ ø5 ø2,5 ø4 ø10 L00-FTW3xxxx-06-05-xx-en-003 Rod and rope version with NPT 1 1/2"...
  • Page 20: Weight

    Liquipoint T FTW 31, FTW 32 Weight Separate-instrument version Rod, 1 m long FTW 31 with 2, 3 or 5 rods (415 g; 530 g; 760 g) Rope, 1 m long FTW 32 with 2, 3 or 5 ropes (390 g; 470 g; 640 g) Compact-instrument version Rod, 1 m long FTW 31 with 2 or 3 rods (600 g;...
  • Page 21 Liquipoint T FTW 31, FTW 32 Rope probes Compact-instrument version: 2 or 3 rods; Separate-instrument version: 2, 3 or 5 rods • Diameter without insulation: 1 mm • Maximum rope length: 15000 mm • Minimum rope length: 250 mm • Thickness of insulation: 0.75 mm •...
  • Page 22: Human Interface

    Liquipoint T FTW 31, FTW 32 Human interface Operating elements FEW 52, FEW 54, FEW 58 One DIL switch for min/max position One DIL switch for 0 s or 2 s switching delay Two DIL switches for setting the measuring ranges 100 Ω, 1 kΩ, 10 kΩ, 100 kΩ Display elements Separate-instrument version Dependent on the connected switching unit (e.g.
  • Page 23: Certificates And Approvals

    L00-FTW31xxx-15-05-xx-en-001 Certificates and approvals CE mark The Liquipoint T meets the legal requirements of the EC directives. Endress+Hauser confirms that the device has been successfully tested by applying the CE mark. Overspill protection Approvals • • Leak test (Leakage)
  • Page 24: Ordering Information

    Liquipoint T FTW 31, FTW 32 Ordering information Liquipoint FTW 31 Certificates Version for non-hazardous areas Version for non-hazardous areas, WHG, Leakage detection ATEX II 3 G EEx nA/C(L) IIC T6, WHG ATEX II 2 G EEx ia IIC T6 Special version Process connection and material Threaded connection G 1 1/2", PPS...
  • Page 25: Liquipoint Ftw 32

    Liquipoint T FTW 31, FTW 32 Liquipoint FTW 32 Certificates Version for non-hazardous areas Version for non-hazardous areas, WHG, Leakage detection ATEX II 3 G EEx nA/C(L) IIC T6, WHG ATEX II 2 G EEx ia IIC T6 Special version Process connection and material Threaded connection G 1 1/2", PPS Threaded connection NPT 1 1/2", PPS...
  • Page 26: Accessories

    Liquipoint T FTW 31, FTW 32 Accessories Liquipoint T Lock nut G 1 1/2" Hexagon, AF 60 TN 52014146 Elektronic insert FEW 52 Output PNP 10.8 ... 45 V DC PN 52017271 Elektronic insert FEW 54 Output Relais 20 ... 253 V AC, 20 ... 55 V DC PN 52017272 Elektronic insert FEW 58 Output NAMUR (IEC 60947-5-6)
  • Page 27 Liquipoint T FTW 31, FTW 32 Endress + Hauser...
  • Page 28 Liquipoint T FTW 31, FTW 32 Endress Hauser GmbH+Co. Instruments International P.O. Box 2222 D-79574 Weil am Rhein Germany Tel. (07621) 975-02 Tx 773926 Fax (07621) 975 345 e-mail: info@ii.endress.com Internet: http://www.endress.com 11.01 TI 375F/00/en/07.03 SL/FM+SGML 6.0 ProMoDo...

This manual is also suitable for:

Liquipoint t ftw 32Liquipoint ftw 31

Table of Contents

Save PDF