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UWT GmbH
NivoBob® 4000

NivoBob® 4000

Product catalog summary

Safety Notes and Technical Support
Installation, maintenance, and commissioning of the NB 4000 must be conducted by qualified personnel. The product should be used as per the manual, with attention to safety warnings regarding electric shock and material damage. For technical support, contact UWT GmbH or your local supplier.

Introduction
The Nivobob® NB 4000 is an electromechanical level measuring instrument for continuous measurement in silos, hoppers, or tanks, suitable for industries like food, grain, cement, and plastics. Key features include independence from bulk material properties, simple installation, and low maintenance.

Dimensions and Materials
The NB 4000 has a robust cast housing with IP66 ingress protection, supports a measurement range up to 30 meters, and includes components made from aluminum and stainless steel. Process connection options include flanges and threads.

Options and Accessories
Available options include a pin for sensor weight stability and a weather protection cover for outdoor use. Accessories include mounting kits and adapters for different thread sizes.

Technical Data
The NB 4000 operates on AC or DC power, with signal outputs of 4-20mA and optional relay outputs. It supports Modbus RTU communication and offers high measurement accuracy, suitable for various operating conditions, including a wide range of temperatures and pressures.

Mounting and Installation
The device can be mounted directly on a flat silo roof using an aiming flange. Electrical installation requires careful attention to power supply and signal output connections.

Programming and Maintenance
Programming involves setting parameters via Modbus RTU. Maintenance includes regular diagnostics and service intervals, with comprehensive diagnostics capabilities in line with NAMUR NE107 recommendations.

Hazardous Locations and Disposal
The NB 4000 is approved for use in hazardous locations with specific certifications. Disposal should follow environmental regulations and guidelines.

Mounting Instructions

General Safety: Ensure proper installation to maintain process pressure and check chemical compatibility of materials.
Mounting Location: Choose a location with minimal vibrations and follow specific mounting instructions, including vertical positioning and space requirements for sensor movement.
Hazardous Locations: Follow installation regulations to prevent sparks and ensure proper equipment grounding.

Electrical Installation

Handling and Safety: Improper handling can compromise safety. Use fuses and RCCB protection as per local regulations.
Wiring: Follow the wiring diagram, ensure proper cable gland specifications, and use shielded cables if necessary.
Hazardous Locations: Use approved entry devices and follow country-specific regulations.

Signal Input/Output

Signal Inputs: Includes start of measurement, measurement interruption, and full detector signals.
Signal Outputs: Provides 4-20 mA and optional relay outputs, with programmable settings for different operational needs.

Programming and Diagnostics

Quickset Menu: Allows for fast setup, including language and unit selection, and setting parameters like silo height and air distance.
Diagnostics: Provides LED status indicators and failure codes to assist in troubleshooting.

Specifications
The system uses Modbus communication with configurable parameters such as language, unit of measurement, maximum move distance, silo height, air distance, and cone height. The current output mode can be set to 4-20 mA or 20-4 mA, with specific settings for failure conditions.

Procedures
The manual outlines procedures for entering advanced menu settings, adjusting timers for automatic measurements, and manually controlling the motor. It also describes how to reset cycles and run time after maintenance.

Maintenance
Regular checks are recommended to ensure mechanical integrity and electrical safety. The document provides guidelines for cleaning and specifies the expected lifetime of the rope/tape and motor, with failure messages appearing at 90% of their expected lifetimes.

Diagnostics
The manual includes a list of failure codes (F10-F17) and maintenance messages (M11), detailing their causes, indications, and solutions. It emphasizes the importance of addressing these issues promptly to avoid equipment damage.

Recommendations
Users are advised to avoid unnecessary wear by not starting the unit more often than necessary and to ensure proper maintenance to extend the lifespan of components.

General Specifications
The NB 4000 is designed for use in hazardous locations. It is important not to cut the rope or tape as this affects measurement accuracy.

Hazardous Location Use
Devices with Ex-approval are marked on the type plate and are approved for atmospheric pressure. The ATEX directive limits its scope to atmospheric pressure (0.8bar to 1.1bar). Deviating pressures require expert assessment.

Temperature and Zone Classification
The permitted temperature range is indicated on the type plate. The equipment is classified for use in different zones based on dust presence: Zone 20 (Category 1D) - EPL Da, Zone 21 (Category 2D) - EPL Db, Zone 22 (Category 3D) - EPL Dc. Electrostatic charge must be managed to avoid danger.

Static Discharge and Disposal
Ensure no static discharge occurs when the sensor weight or rope/tape contacts the bulk material. A plastic sensor weight and rope insulation are available to maintain a safe distance. Recycling should be done by specialized companies.

Maximum Surface Temperature
The maximum surface temperature is specified for different ambient and process temperatures, with a maximum of 150°C (302°F) for both ambient and process temperatures, corresponding to temperature codes T200 and T3C.

Catalog excerpts

Continuous level measuring system NB 4000 Technical information / Instruction manual Page Safety notes/ Technical support 2 ------------------------------------------------------------------------------------------------------ Introduction 3 -----------------------------------------------------------------------------------------------------Dimensions and materials 4 ------------------------------------------------------------------------------------------------------ Options/ Accessories 7 -----------------------------------------------------------------------------------------------------Technical data 8 -----------------------------------------------------------------------------------------------------Mounting 11 -----------------------------------------------------------------------------------------------------Mounting with aiming flange -----------------------------------------------------------------------------------------------------Signal overview 18 -----------------------------------------------------------------------------------------------------Programming 20 -----------------------------------------------------------------------------------------------------Maintenance General items 27 Diagnostics Maintenance 29 Diagnostics Failure 29 -----------------------------------------------------------------------------------------------------Notes for use in Hazardous Locations 11 Subject to technical change. We assume no liability for typing errors. Different variations to those specified are possible. Please contact our technical consultants.

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Continuous level measuring system NB 4000 Technical information / Instruction manual Safety notes / Technical support Installation, maintenance and commissioning must be carried out only by qualified technical personnel. The product must be used only in the manner outlined in this instruction manual. 3 Special attention must be paid to warnings and notes as follows: WARNING Relates to a caution symbol on the product and means, that a failure to observe the necessary precautions can result in death, serious injury and/ or considerable material damage. Relates to a caution symbol on the product:...

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Continuous level measuring system NB 4000 Technical information / Instruction manual The Nivobob® NB 4000 is an electromechanic level measuring instrument for continuous measuring of level or volumes in silos, hoppers or tanks. Applications • Powder, granulate, small or coarse bulk goods Available for industries such as • Food • Grain • Cement • Plastics • others Features Process • Suitable for most types of bulk goods • Independent of bulk material properties, such as: Dielectricity and conductivity of the bulk good Dusty atmosphere in the silo Changing humidity inside the product Products that...

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Continuous level measuring system NB 4000 Technical information / Instruction manual 2 Process connection: Flange 5 Process connection: Aiming flange To be screwed directly to the silo roof 0° - 50° adjustable Including screws, nuts and sealing 6 Process connection: Thread 7 Rope/ tape Silo roof 8 Flange plate outside dimensions: Width x Heigth: 120 mm x 180 mm (4.7" x 7.1") Dimensions X = Length to bottom of sensor weight (in upper stop position, see next page) Housing outside Aluminium, outside powder coated Thread/ flange A = Length of socket pipe 100 mm (3.9") Optional 200 mm (7.9")/ 500...

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Continuous level measuring system NB 4000 Technical information / Instruction manual Sensor weights Rope version Stainless steel Folding cover 5 380 x 380 mm (15 x 15") Material: 1.4310 (301)/ PA canvas For material densitiy >20g/l (1.2 lb/ft3) Fits through 11/2" mounting hole Tape version Stainless steel Fixing elements between tape and sensor weight: aluminium/ 1.4305 (304)

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Continuous level measuring system NB 4000 Technical information / Instruction manual 2 Folding cover Spider 380 x 380 mm (15 x 15") Material: 1.4310 (301)/ 1.4305 (303)/ PA canvas For material densitiy >20 g/l (1.2 lb/ft3) Fits through 11/2" mounting hole Fixing elements between tape and sensor weight: aluminium/ 1.4305 (304) All sensor weights: 1.6 kg (3.5 lbs)

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Continuous level measuring system NB 4000 Technical information / Instruction manual Options Pin for sensor weight Weather protection cover Recommended for powder The pin penetrates into the material and avoids slipping or tilting of the sensor weight on the steep bulk surface. If the unit is used outdoors, the use of the weather protection cover is recommended. It protects the device from all atmospheric influences such as • rain water • condensation water • excessively high temperatures • excessively low temperatures in winter Material: PE, weather and temperature stable For use in Hazardous...

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Continuous level measuring system NB 4000 Technical information / Instruction manual Technical data Electrical data Power supply AC version 230 V or 115 V 50 - 60 Hz +10%/ -15% (incl. 10% of EN 61010) DC version 20 .. 28 V (incl. 10% of EN 61010) Installed load DC version: One unit: 150 W (with or without internal heater) * Further units which are connected to the same power supply: 25 W per unit (without internal heater, motor off) ** 50 W per unit (without internal heater, motor running) 80 W per unit (with internal heater, supply voltage 20 V DC) 100 W per unit (with internal heater, supply...

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Continuous level measuring system NB 4000 Technical information / Instruction manual Technical data Extension cables for Modbus Use common recommended cables Power supply to all other outputs/ inputs: Relay to relay: 2,210 Vrms Protection class Overvoltage category Pollution degree AC version 2,210 Vrms DC version: 1,000 VDC 4 Mechanical data Ingress protection Process connection Aiming flange: R 11/2" EN 10226 tapered, NPT 11/2" ANSI B1.20.1 tapered (Adapter for NPT 3" available) DN100 PN16 EN 1092-1 (unit fits to this flange) 2" or 3" or 4" 150lbs ANSI B16.5 (unit fits to this flange) To be...

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