Kobold NMF Manuel utilisateur

Operating Instructions

for

Membrane Level Monitor

for Bulk Goods

Model: NMF

NMF

page 2 NMF K07/0123

1. Contents

1.Contents ........................................................................................................ 2

2.Note .............................................................................................................. 3

3.Instrument Inspection .................................................................................... 3

4.Regulation Use ............................................................................................. 3

5.Operating Principle ........................................................................................ 4

6.Mechanical Connection ................................................................................. 4

6.1Installation with very coarse-grained and sharp-edged bulk goods ..... 4

7.Electrical Connection .................................................................................... 5

7.1Connection diagram ............................................................................. 5

8.Technical Information / Configuration ............................................................ 6

9.Order Codes ................................................................................................. 6

10.Dimensions ................................................................................................... 6

11.Disposal ........................................................................................................ 7

12.EU Declaration of Conformance ................................................................... 8

Manufactured and sold by:

Kobold Messring GmbH

Nordring 22-24

D-65719 Hofheim

Tel.: +49(0)6192-2990

Fax: +49(0)6192-23398

E-Mail: [email protected]

Internet: www.kobold.com

NMF

NMF K07/0123 page 3

2. Note

Please read these operating instructions before unpacking and putting the unit

into operation. Follow the instructions precisely as described herein.

The instruction manuals on our website www.kobold.com are always for currently

manufactured version of our products. Due to technical changes, the instruction

manuals available online may not always correspond to the product version you

have purchased. If you need an instruction manual that corresponds to the

purchased product version, you can request it from us free of charge by email

([email protected]) in PDF format, specifying the relevant invoice number and

serial number. If you wish, the operating instructions can also be sent to you by

post in paper form against an applicable postage fee.

Operating instructions, data sheet, approvals and further information via the QR

code on the device or via www.kobold.com

The devices are only to be used, maintained and serviced by persons familiar

with these operating instructions and in accordance with local regulations

applying to Health & Safety and prevention of accidents.

When used in machines, the measuring unit should be used only when the

machines fulfil the EC-machine guidelines.

3. Instrument Inspection

Instruments are inspected before shipping and sent out in perfect condition.

Should damage to a device be visible, we recommend a thorough inspection of

the delivery packaging. In case of damage, please inform your parcel service /

forwarding agent immediately, since they are responsible for damages during

transit.

Scope of delivery:

The standard delivery includes:

 Membrane Level Monitor model: NMF

4. Regulation Use

Any use of the Membrane Level Monitor, model: NMF, which exceeds the

manufacturer’s specifications, may invalidate its warranty. Therefore, any

resulting damage is not the responsibility of the manufacturer. The user assumes

all risk for such usage.

NMF

page 4 NMF K07/0123

5. Operating Principle

Membrane level monitors allow economic level monitoring of bulk goods in

storage vessels. They may be used to indicate full and empty states and load

demand for dusty, powdery, granulated and grainy bulk goods. They are suitable

for use with bulk materials (0.3 to 2.5 t/m3) and particle sizes up to 30 mm. The

devices will operate faultlessly provided the bulk goods flow easily at not too

small an angle. Only such materials exert sufficient operating pressure on the

detector fitted in the wall of the silo.

The housing made of cast aluminium or glass-fibre reinforced plastic carries the

membrane retained by a screwed-on ring. With its own weight the bulk material

presses against the membrane which is prestressed with a spring through to the

support. A plunger fixed to the membrane transfers the pressure directly to a

microswitch with changeover contact. If the bulk material subsides, the

membrane is relieved and the contact is switched back. The sensitivity can be

adjusted with a spring. The monitor can thus be optimised for the type of fill and

the installation conditions.

6. Mechanical Connection

6.1 Installation with very coarse-grained and sharp-edged bulk

goods

The installation of guards is recommended for very large grained and sharp-

edged materials with high specific weight.

A proposal for such a guard is

shown in the sketch. The guard

mounted over the level monitor

protects sensor and membrane

against damage from dropping bulk

material. The curtain (made of

rubber or plastic, for instance) protects

the membrane from excessive

wear by hanging against the membrane

as the amount of bulk material

increases. Make sure that

the monitor is not in the path of

the inflowing material, as otherwise

monitor and membrane would be

destroyed very quickly.

NMF

NMF K07/0123 page 5

7. Electrical Connection

7.1 Connection diagram

Attention! Make sure that the voltage values of your system

correspond with the voltage values of the measuring unit.

 Make sure that the supply wires are de-energised.

 Plug in the system according to the connecting diagrams.

Attention! Incorrect wiring will lead to damage of the unit’s

electronics.

NONC C

3 or 4

NMF

page 6 NMF K07/0123

8. Technical Information / Configuration

Operating instructions, data sheet, approvals and further information via the QR

code on the device or via www.kobold.com

9. Order Codes

Operating instructions, data sheet, approvals and further information via the QR

code on the device or via www.kobold.com

10. Dimensions

Operating instructions, data sheet, approvals and further information via the QR

code on the device or via www.kobold.com

NMF

NMF K07/0123 page 7

11. Disposal

Note!

 Avoid environmental damage caused by media-contaminated parts

 Dispose of the device and packaging in an environmentally friendly

manner

 Comply with applicable national and international disposal regulations and

environmental regulations.

Batteries

Batteries containing pollutants are marked with a sign consisting of a crossed-out

garbage can and the chemical symbol (Cd, Hg, Li or Pb) of the heavy metal that

is decisive for the classification as containing pollutants:

Cd1 Hg2 Pb3 Li4

1. „Cd" stands for cadmium

2. „Hg" stands for mercury

3. „Pb" stands for lead

4. „Li" stands for lithium

Electrical and electronic equipment

NMF

page 8 NMF K07/0123

12. EU Declaration of Conformance

We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole

responsibility that the product:

Membrane Level Monitor Model: NMF-...

to which this declaration relates is in conformity with the standards noted below:

EN 61010-1:2010 Safety requirements for electrical equipment for

measurement, control and laboratory use - Part 1: General requirements

EN 60529:2013 Degrees of protection provided by enclosures (IP Code)

EN 50581:2012 Technical documentation for the assessment of electrical

and electronic products with respect to the restriction of hazardous substances

Also the following EC guidelines are fulfilled:

2014/35/EU Low Voltage Directive

2011/65/EU RoHS (category 9)

2015/863/EU Delegated Directive (RoHS III)

Hofheim, 30 July 2019

H. Peters M. Wenzel

General Manager Proxy Holder

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