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Summary of Contents for Endress+Hauser nivocompact FTC 831
- Page 1 BA 024F/00/en/07.98 nivocompact 015191-0001 FTC 831 Level Limit Switch Installation and Operating Manual Endress Hauser The Power of Know How...
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Page 3: Table Of Contents
Contents Page Application Application Examples Technical Data The Measuring System Function Installation Project Planning Examples for Mounting Mounting Type key Connection Wiring Connection EC 40 (Two-Wire Connection) for AC EC 42 (Three-Wire PNP) for DC EC 43 (Three-Wire NPN) for DC EC 44 (Relay output) for DC and AC Wiring On-Site Calibration... - Page 4 Nivocompact FTC 831...
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Page 5: Application
Application Application The Nivocompact FTC 831 is used for limit detection in silos containing bulk solids (for minimum or maximum indication). Also for use in the food processing industry. For mounting in silos from above. Fig. 1 Limit detection in bulk solid silos with the capacitive level limit switch Nivocompact FTC 831. -
Page 6: Technical Data
Nivocompact FTC 831 Technical Data Technical Data • Operating temperature in silo: –20 °C…+60 °C Operating Data • Operating pressure p in silo: up to 6 bar • Max. permissible load on probe: 2500 N vertical • Grain size of bulk solid: up to approx. 10 mm •... - Page 7 Technical Data Fig. 2 Dimensions Nivocompact FTC 831...
- Page 8 Nivocompact FTC 831 Technical Data • Terminal connections: for max. 2.5 mm Electronic Inserts • Measuring frequency: approx. 1.6 MHz • Switching delay: approx. 0.5 s…approx. 20 s, selectable • Minimum/maximum fail-safe switching: selectable with rotary switch • Switching indication: red LED •...
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Page 9: The Measuring System
The Measuring System The Nivocompact is an electronic switch. The entire measuring system consists of: • Nivocompact FTC 831 • power supply and • connected control systems, switches, signal transmitters (e.g. process control systems, PLC, relays, microcontactors, lamps, sirens etc.). -
Page 10: Function
This change in the time constant is evaluated and the Nivocompact FTC 831 is activated according to its switching mode. Fig. 5 The operation of the Nivocompact FTC 831 with rope probe is totally unaffected by material build-up on the walls of the silo. -
Page 11: Installation
FTC 731 must also be at least 500 mm. The distance from the probe end of a Nivocompact FTC 831 to the silo wall or to any material build-up must be at least 200 mm. To ensure that no error... -
Page 12: Examples For Mounting
Nivocompact FTC 831 Installation Examples for Mounting Correct Installation Incorrect Installation Fig. 6 Noting the information given will prevent errors when installating the instrument. Correct Installation a) Protective sun cover for mounting in the open. b) Sufficient distance from the material inlet and to the next probe. -
Page 13: Mounting
Check that the probe is the correct length for the installation point and application. The length of the Nivocompact FTC 831 probe at delivery is stated on the nameplate. The probe may be shortened if it is too long. Refer to Section: »Shortening the Cable«... - Page 14 Nivocompact FTC 831 Installation Rotating the Housing The housing can be rotated if the cable gland is facing in the wrong direction after the Nivocompact has been securely screwed in: Loosening • Unscrew and remove the housing cover. In the housing are 2 four-pole connections which are required if the cable needs to be shortened.
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Page 15: Connection
The last number of the order code on the nameplate identifies which type of Main Features of the Different Electronic Inserts electronic insert is mounted in the Nivocompact FTC 831: 1=Electronic insert EC 40 Two-wire AC; voltage: 21 V…250 V Electronic switch, max. -
Page 16: Ec 40 (Two-Wire Connection) For Ac
In this case connect an additional load in parallel to the relay, e.g. a resistor or signal lamp. Fig. 10 Connecting the Nivocompact FTC 831 with electronic insert EC 40 ∼ : 21 V...250 V across Terminals 1 and 2 of the EC 40 R: Connected (external) load, e.g. -
Page 17: Ec 42 (Three-Wire Pnp) For Dc
Connection Connecting the Nivocompact with Electronic Insert EC 42 (Three-Wire PNP) for DC The load connected to Terminal 3 is switched by a transistor, contactless Transistor Circuit for Load and therefore without bounce. Terminal 3 has a positive signal in normal switching mode. The transistor is blocked on level alarm or with a power failure. -
Page 18: Ec 43 (Three-Wire Npn) For Dc
Nivocompact FTC 831 Connection Connecting the Nivocompact with Electronic Insert EC 43 (Three-Wire NPN) for DC Transistor Circuit for Load The load connected to Terminal 3 is switched by a transistor, contactless and therefore without bounce. Terminal 3 has a negative signal in normal switching mode. -
Page 19: Ec 44 (Relay Output) For Dc And Ac
Connection Connecting the Nivocompact with Electronic Insert EC 44 (Relay output) for DC and AC With AC, it is unimportant whether L1 or N is connected to Terminal 1. Power Supply With DC, it is unimportant whether L+ or L– is connected to Terminal 1. The load is connected over a potential-free relay contact (change-over Relay Contact for Load contact). -
Page 20: Wiring On-Site
Nivocompact FTC 831 Connection Wiring On-Site • Open-end spanner 22 AF Tools Required for Connection • Screwdrivers, blade width approx. 4 mm and approx. 7 mm or Phillips screwdrivers PZD 1 and PZD 2 • Common electrical tools Before connecting, make sure that the power supply used is the same as that stated on the nameplate of the electronic insert. -
Page 21: Calibration
Calibration Calibration • Screwdriver with blade width approx. 3 mm Tools Required for Calibration • Screwdriver with blade width approx. 4 mm The rotary switches and adjusting elements for calibration are on the electronic insert in the housing. Directly beside these calibration elements are the power connections with voltages up to 250 V. -
Page 22: Safety Switching
Nivocompact FTC 831 Calibration Safety Switching By using the rotary switch, select the fail-safe mode for your particular application: • Maximum fail-safe: The circuit is blocked if the probe is covered or the power supply fails. • Minimum fail-safe: The circuit is blocked if the probe is covered or the power supply fails. -
Page 23: Special Applications
Calibration Special Applications • When the dielectric constant ε of the material is smaller than 2.0, Capacitance Calibration e.g. with plastic granulate, it may be necessary to change the factory-set (Changing Factory-Set value. Adjustment) Calibration is possible for ε > 1.6. •... - Page 24 Nivocompact FTC 831 Calibration Determining the Switching Point Fig. 18 The capacitance calibration must be carried out both slowly and carefully. Adjusting for Material Characteristics Material characteristics (bulk solid) Very low dielectric constant No build-up approx. 180° (4 divisions) ε...
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Page 25: Function Control
For applications in the open, a protective sun cover (accessory) is to be used to cover the aluminium housing of the Nivocompact. Maintenance The capacitive level limit switch Nivocompact FTC 831 requries no maintenance when correctly installed and used properly under the normal conditions specified by the system. - Page 26 Nivocompact FTC 831 Troubleshooting Error with maximum fail-safe mode Possible causes Probe free (level below maximum) - High material build-up at end of probe - Water in housing but with electronic switch blocked LED on Probe covered (level above maximum)
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Page 27: Replacement Of Parts
• Carry out a new capacitance calibration with an empty silo. • Check operation. Returning Parts for Repair If a Nivocompact FTC 831 cannot be repaired and needs to be sent back to Endress+Hauser, then please note the following: Remove all material residue attached to the probe. -
Page 28: Shortening The Cable
Nivocompact FTC 831 Shortening the Cable Shortening the Cable • Open-end spanner 17 AF Tools Required • Screwdriver, blade width 5...6 mm or Phillips screwdriver PZD 2 • Universal pliers • Wire cutter • Wire stripper • Unscrew and remove the housing cover. - Page 29 Shortening the Cable Fig. 22 Left: Exploded view of the upper part of the Nivocompact FTC 831. Above right: The cores shown being cut off and the plug connector pulled apart. Below right: Diagram to show how far the shortened...
- Page 30 Nivocompact FTC 831 Shortening the Cable • Put the 4 free cores into the connector supplied so that after connecting Connection the colours correspond. The plug connector has cutting terminals so that the cores must not be bared. • Crimp the plug connector together (e.g with universal pliers or a multiwrench).
- Page 32 Tel. 4 68 82 22, Fax 4 66 68 48 Belgium Endress+Hauser S.A./N.V. Poland Chile South Korea Brussels Endress+Hauser Polska Sp. z o.o. DIN Instrumentos Ltda. Endress+Hauser (Korea) Co., Ltd. Tel. (02) 2 48 06 00, Fax (02) 2 48 05 53 Warszawy Santiago Seoul Tel.
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