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Summary of Contents for Endress+Hauser nivocompact FTC 731
- Page 1 BA 023F/00/en/03.92 nivocompact 015172-0001 FTC 731 Level Limit Switch Installation and Operating Manual Endress Hauser The Power of Know How...
- Page 2 BA 023F/00/en/03.92 015172-0001 HD/CV4.2...
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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 30 (Two-Wire Connection) for AC EC 32 (Three-Wire PNP) for DC EC 33 (Three-Wire NPN) for DC EC 34 (Relay Output) for DC and AC Wiring On-Site Calibration... - Page 4 Nivocompact FTC 731...
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Page 5: Application
Application Application The Nivocompact FTC 731 is used for limit detection in silos containing bulk solids (for minimum or maximum indication). It is also for use in the food processing industry. It can be mounted in the silo from any direction. -
Page 6: Technical Data
• Housing IP 55: standard PG in nickel-plated brass with NBR gasket Cable Gland for cable diameter 7…10 mm. • Housing IP 66: water-tight PG in polyamide with Neoprene-CR gasket for cable diameter 5…12 mm. Fig. 2 Dimensions Nivocompact FTC 731. - Page 7 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 • Power supply U∼: 21 V…250 V, 50/60 Hz Electronic Insert EC 30 •...
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Page 8: The Measuring System
The Measuring System The Nivocompact is an electronic switch. The entire measuring system consists of: • Nivocompact FTC 731 • power supply and • connected control systems, switches, signal transmitters (e.g. process control systems, PLC, relays, microcontactors, lamps, sirens etc.). -
Page 9: Function
This change in the time constant is evaluated and causes the Nivocompact FTC 731 to switch. Fig. 5 Operation of the Nivocompact FTC 731 with rod probe is not affected by material build-up, even when several centimetres thick, at the silo wall. -
Page 10: Installation
Nivocompact FTC 731 instruments must be maintained to ensure that there is no mutual interference. The distance between the probe end of a Nivocompact FTC 731 and the probe end a Nivocompact FTC 831 must be at least 500 mm. -
Page 11: Examples For Mounting
(half socket length = 25 mm); with minimum distance of 200 mm to the next Nivocompact FTC 731; with minimum distance > 500 mm to a Nivocompact FTC 831. b) Threaded socket + silo wall + material build-up is a maximum 50 mm thick so that no calibration is required before start-up. -
Page 12: Mounting
Nivocompact FTC 731 Installation Mounting • Open-end spanner 60 AF Tools Required for Installation • Screwdriver, blade width 5…6 mm or Phillips screwdriver PZD 2 Preparation Compare the order code on the nameplate of your instrument with the order specification key to ensure that the correct instrument is being installed. - Page 13 Installation The housing can be rotated if the cable gland is facing in the wrong Rotating the Housing direction after the Nivocompact has been securely screwed in: Loosening • Unscrew and remove the housing cover • Loosen the central screw in the electronic insert •...
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Page 14: Connection
Main Features of the Different The last number of the order code on the nameplate identifies which type of Electronic Inserts electronic insert is mounted in the Nivocompact FTC 731: 1=Electronic insert EC 30 Two-wire AC: 21 V…250 V Electronic switch, max. 350 mA 2=Electronic insert EC 32 Three-wire DC: 10 V…55 V... -
Page 15: Ec 30 (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. 12 Connecting the Nivocompact FTC 731 with electronic insert EC 30 ∼:21 V...250 V across Terminals 1 and 2 of the EC 30 Connected (external) load, e.g. -
Page 16: Ec 32 (Three-Wire Pnp) For Dc
Nivocompact FTC 731 Connection Connecting the Nivocompact with Electronic Insert EC 32 (Three-Wire PNP) for DC Transistor Circuit for Load The load connected to Terminal 3 is switched by a transistor, contactless and therefore without bouncing. Terminal 3 has a positive signal in normal switching mode. -
Page 17: Ec 33 (Three-Wire Npn) For Dc
Connection Connecting the Nivocompact with Electronic Insert EC 33 (Three-Wire NPN) for DC The load connected to Terminal 3 is switched by a transistor, contactless Transistor Circuit for Load and therefore without bouncing. Terminal 3 has a negative signal in normal switching mode. The transistor is blocked on level alarm or with a power failure. -
Page 18: Ec 34 (Relay Output) For Dc And Ac
Nivocompact FTC 731 Connection Connecting the Nivocompact with Electronic Insert EC 34 (Relay Output) for DC and AC Power Supply With AC, it is unimportant whether L1 or N is connected to Terminal 1. With DC, it is unimportant whether L+ or L– is connected to Terminal 1. -
Page 19: Wiring On-Site
Connection Wiring On-Site • Open-end spanner 22 AF Tools Required for Installation • Screwdrivers, blade width approx. 4 mm and 7 mm or Phillips screwdrivers PZD 1 and PZD 2 • Usual 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 20: Calibration
Nivocompact FTC 731 Calibration Calibration Tools Required for Calibration • Screwdriver with blade width approx. 3 mm • Screwdriver with blade width approx. 4 mm The rotary switches and adjusting elements for calibration are on the electronic insert in the housing. -
Page 21: Saftey Switching
Calibration By using the rotary switch, select the fail-safe mode for your particular Safety Switching application: • Maximum fail-safe: the current circuit is blocked if the probe is covered or the power supply fails. • Minimum fail-safe: The current circuit is blocked if the probe is uncovered of the power supply fails. -
Page 22: Particular Cases: Capacitance Calibration
Nivocompact FTC 731 Calibration Particular Cases Capacitance Calibration • the installation cannot be carried out according to Fig. 7 b, (Changing Factory Setting) • the dielectric constant ε of the bulk solid is lower than 2.0, e.g. plastic granulate, then it may be necessary to change the factory-set adjustment. - Page 23 Calibration Determining the Switching Point Fig. 20 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. 90° (2 divisions) ε approx. 1.6...2.0 With low build-up approx.
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Page 24: 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 731 requires no maintenance when correctly installed and used properly under the normal conditions specified by the system. - Page 25 Troubleshooting Error with maximum fail-safe mode Possible causes Probe free (level below maximum) - High material build-up on the vessel wall or on probe rod - Water in housing but with electronic switch blocked LED on Probe covered (level above maximum) - Dielectric constant of the material too small - Drier (or different) material now...
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Page 26: Replacement Of Parts
• If required: Carry out a capacitance calibration. Returning Parts for Repair If a Nivocompact FTC 731 cannot be repaired and needs to be sent back to Endress+Hauser, then please note the following: Cleaning the Probe Remove all material residue attached to the probe. - Page 28 Belorgsintez Canada Poland Singapore Minsk Endress+Hauser Ltd. Endress+Hauser Polska Sp. z o.o. Endress+Hauser (S.E.A.) Pte., Ltd. Tel. (01 72) 508473, Fax (01 72) 508583 Burlington, Ontario Warszawy Singapore Tel. (9 05) 6 81 92 92, Fax (9 05) 6 81 94 44 Tel.
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