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UWT GmbH
Mononivo® 4000

Mononivo® 4000

Product catalog summary

Safety Notes and Technical Support:
Installation, maintenance, and commissioning of the MN 4000 level limit switch should be performed by qualified personnel. The product must be used according to the manual, with attention to warnings about electric shock and material damage. For technical support, contact UWT GmbH or your local supplier.

Introduction:
The MN 4000 level limit switch is designed for monitoring levels in containers and silos, suitable for powdery and granulated materials with a density greater than 20 g/l. It is applicable in industries such as building materials, food, plastics, timber, chemical, and mechanical engineering. The device can be mounted laterally or from the top of the container.

Technical Data:
The device operates with a universal voltage and a vibration frequency of approximately 330 Hz. It is suitable for ambient temperatures from -40°C to +60°C and process temperatures up to +150°C. The housing is made of aluminum with a degree of protection IP67.

Approvals:
The device has approvals for general and hazardous locations, including CE, UKCA, ATEX, IEC-Ex, and others. It complies with EMC and RoHS directives and is not subject to the Pressure Equipment Directive.

Options:
Available options include weather protection covers, sliding sleeves, mounting sets, signal lamps, and plugs to enhance functionality and adaptability.

Mounting:
Proper installation is crucial to maintain process pressure and ensure chemical resistance. The device should be mounted to avoid contact with silo walls and incoming materials.

Electrical Installation:
Details include connection terminals, cable entry, and signal output. The device supports various power supplies and has built-in LED indicators for signal status.

Signal Output and Sensitivity Setting:
The device provides a floating relay DPDT signal output and allows for sensitivity adjustments to accommodate different material densities.

Maintenance:
Regular maintenance is necessary to ensure optimal performance, especially in environments with high flow rates of abrasive materials.

Notes for Use in Hazardous Locations:
Special considerations and approvals are required for use in hazardous areas, with specific guidelines provided in the manual.

Assembly MN 4040:
Instructions for assembling the MN 4040 model, including necessary components and configurations.

Disposal:
Guidelines for the proper disposal of the device to comply with environmental regulations.

Technical Specifications:
Key points include the importance of considering the medium and fixtures in the container, especially for extension lengths over 3 meters. The sliding sleeve 'Pressure tight' version requires tightening of straining screws to 12 Nm for pressure resistance. Flange mounting requires a plastic sealing, and the mounting torque for threaded connections should not exceed 80 Nm.

Mounting Instructions:
General safety instructions specify maximum deviation and length parameters. Additional safety instructions for hazardous locations emphasize adherence to installation regulations to prevent sparks. The oscillating rod should not be bent, shortened, or extended, and the housing can be rotated after mounting. Proper sealing and precautions for dismounting/service are also highlighted.

Electrical Installation:
Handling instructions stress the importance of protective earthing and adherence to local regulations. The document specifies the use of a fuse and RCCB protection, and details the requirements for cable glands and conduit systems. Field wiring cables must meet specific insulation and temperature ratings, and protection against static charging is necessary.

Signal Output and Sensitivity Setting:
Guidance is provided on setting the sensor for full or empty load indications, with factory settings covering most applications. Sensitivity settings can be adjusted based on the bulk material's characteristics.

Maintenance:
Maintenance procedures include steps for changing the electronic board and frequent checks for mechanical damage or corrosion. Cleaning instructions emphasize the compatibility of cleaning agents with the unit's materials.

Hazardous Locations:
Notes for use in hazardous locations cover zone classification, marking, process pressure, and temperature ranges. The document explains the limitations of ATEX approvals to atmospheric pressure and provides guidance on electrostatic charge prevention.

Overview: The document provides technical information and instructions for the Series MN 4000 level limit switch, focusing on its use in hazardous locations, assembly, and disposal.

Specifications:

Permitted Zones: Suitable for Zone 20 (EPL Da, Category 1D) and Zone 21 (EPL Db, Category 2D).
Temperature Ratings: Maximum surface temperatures range from 120°C to 150°C, with corresponding temperature classes T4A to T3C.

Assembly Instructions:

Extension Tube Manufacturing: Must be made from stainless steel (various grades) as a single piece, with specific dimensions and thread standards (R 1" or NPT 1").
Mounting: Ensure proper sealing (IP67 or NEMA Type 4) and electrical grounding. Use temperature-resistant sealing and fix threads with 50 Nm torque.
Cable Management: Adjust cable length as needed, using provided hoses and sleeves, and ensure no winding inside the housing.

Procedures:

Connecting the Plug: Follow the correct sequence for connecting wires and securing with a cable tie.
Inserting Electronics: Insert the plug into the electronic unit, place it in the housing, and secure with screws.

Disposal: The product is recyclable, and recycling should be conducted by a specialized company.

Catalog excerpts

Level limit switch Series MN 4000 Technical Information / Instruction manual 2 Page Safety notes/ Technical support 2 ----------------------------------------------------------------------------------------------------- Introduction 3 ----------------------------------------------------------------------------------------------------Technical data 4 ----------------------------------------------------------------------------------------------------Electrical installation 14 ----------------------------------------------------------------------------------------------------Signal output 17 Maintenance 18 ----------------------------------------------------------------------------------------------------Notes for use in Hazardous Locations Subject to technical change. We assume no liability for typing errors. Different variations than specified are possible. Please contact our technical consultants.

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Level limit switch Series MN 4000 Technical Information / Instruction manual Safety notes / Technical support Installation, maintenance and commissioning may be accomplished 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: 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: Risk of electric shock...

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Level limit switch Series MN 4000 Technical Information / Instruction manual Applications The Mononivo oscillating probe is normally screwed into the lateral container wall so that it is level with the filling height to be registered and monitored. The device is used for level monitoring in all types of containers and silos. It can be used with all powdery and granulated bulk materials with a densitiy greater than 20 g/l (1.25 lb/ft3) that do not show a strong tendency to form crusts or deposits. The units can be delivered with Ex-approvals for use in Dust Hazardous Areas. Building materials...

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Level limit switch Series MN 4000 Technical Information / Instruction manual Technical data Temperature extended shaft (pos.3 2) 11 Temperature extended shaft (pos.3 2)

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Level limit switch Series MN 4000 Technical Information / Instruction manual Technical data Extension tube NOT part of delivery * Thread on extension tube

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Level limit switch Series MN 4000 Technical Information / Instruction manual Technical data Electrical data Connection terminals Cable entry M20 x 1.5 screwed cable gland NPT 1/2“ conduit connection NPT 3/4” conduit connection Clamping range (diameter) of the factory provided cable glands: M20 x 1.5: 6 .. 12 mm (0.24 .. 0.47"") Signal delay Sensor free -> covered ca. 1 sec Sensor covered -> free ca. 1 .. 2 sec Safety operation (FSL,FSH) Vibration frequency Switchable for minimum or maximum safety Overvoltage category Pollution degree Universal voltage Relay DPDT 21 V .. 230 V 50 - 60 Hz ±10%*...

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Level limit switch Series MN 4000 Technical Information / Instruction manual Technical data Mechanical data Housing Aluminium housing, powder coated RAL 5010 gentian blue Seal between housig and lid: NBR Seal between housing and process connection: NBR Nameplate: polyester film IP67* (EN 60529), NEMA Type 4X * For version with plug the type of protection can be lower (see option plug/ page 10). Partition wall between Zone 20 and Zone 21 (EPL Da/Db) Material: Thickness: Expected lifetime under constant functional vibration stress: 20 years (depending on application and ambient conditions) Note:...

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Level limit switch Series MN 4000 Technical Information / Instruction manual Technical data Material: stainless steel 1.4404 (316L) (food grade) Sound level Operating conditions Ambient temp. (housing) Process temperature 6 For versions with Ex-approvals: see remarks on page 21. Features of bulk material No strong tendency to cake or deposit 400 N (@40°C, 104°F) laterally (on oscillator rod) Recommended protection in case of high material load: mounting of an protective angle above the probe 16 bar (232 psi) For versions with “sliding sleeve without process overpressure” (option pos.25 a,b,c):...

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Level limit switch Series MN 4000 Technical Information / Instruction manual Technical data / Approvals Transport and Storage Transport Observe the instructions as stated on the transport packaging, otherwise the products may get damaged. Transport temperature: -40 .. +80°C (-40 .. +176°F) Transport humidity: 20 .. 85% Transport incoming inspections must be caried out to check for possible transport damage. Storage Products must be stored at a dry and clean place. They must be protected from influence of corrosive environment, vibration and exposure to direct sunlight. 5 Approvals General Purpose...

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Level limit switch Series MN 4000 Technical Information / Instruction manual Weather protection cover When the measuring device is used outdoor, the use of the weather protection cover is recommended. It protects the device from all atmospheric influences such as: • • • • rain water condensation of water excessively high temperatures due to insulation excessively low temperatures in winter Material: PE, weathering and temperature stable Not available for housing version d and de. For use in Hazardous Locations: only permitted for Category 3 (zone 22) or Division 2. Sliding sleeve Version with...

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Level limit switch Series MN 4000 Technical Information / Instruction manual General Safety Instructions Process pressure Improper installation may result in loss of process pressure. Chemical resistance against the medium Materials of construction are chosen based on their chemical compatibility (or inertness) for general purposes. For exposure to specific environments, check with chemical compatibility charts before installing. Temperature range The range of the ambient and process temperature of the device must be observed (see page 8 and for Ex-approvals page 21) Mechanical load The torque...

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