Kobold NMT Bedienungsanleitung

Operating Instructions

for

Magnetostrictive Level Meter

Model: NMT/NBK-T

NMT/NBK-T

Seite 2 NMT/NBK-T K05/0123

1. Contents

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

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

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

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

5.Operation Principle ............................................................. 4

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

7.Electrical Inspection ............................................................ 5

8.Commissioning ................................................................... 5

9.Maintenance ....................................................................... 5

10.Technical Information ......................................................... 6

11.Order Codes ....................................................................... 6

12.Dimensions ......................................................................... 6

13.Disposal .............................................................................. 7

14.EU Declaration of Conformance ......................................... 8

15.UK Declaration of Conformity ............................................. 9

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

NMT/NBK-T

NMT/NBK-T K05/0123 Seite 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 with the prevailing regulation applying to

procedural safety and the prevention of accidents.

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

machines fulfil the EC machinery directive.

3. Instrument Inspection

These devices are checked before shipping and sent out in perfect condition.

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

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

forwarding agent immediately, since they are responsible for damages during

transit.

Scope of delivery NMT:

 Magnetostrictive Level Meter, model: NMT

Scope of delivery NBK-…T:

The standard scope of delivery includes:

 Sensor with transmitter type: NBK-…T

NMT/NBK-T

Seite 4 NMT/NBK-T K05/0123

4. Regulation Use

The level meter is to be installed only in the specified applications. Any usage

which exceeds the specifications is considered to be non-specified. Any damages

resulting therefrom are not the responsibility of the manufacturer. The user

assumes all risk for such usage. The application specifications include the

installation, start-up and service requirements specified by the manufacturer.

5. Operation Principle

The Kobold level meter NMT/NBK-…T is a very accurate float-controlled sensor

for the continuous measurement of levels.

The principle of measurement is based on echo time measurement. A magne-

tostrictive wire is tensioned in the guide tube. Current pulses are transmitted

through the wire thus generating an annular magnetic field around the wire. The

wire is also magnetized axially by magnets fitted in the float. Due to the superim-

position of both magnetic fields, a torsional impulse is generated in the vicinity of

the float magnet, which propagates with ultrasonic speed in both directions. The

distance from the float magnet to a defined zero-point is measured by an echo

time measurement. The integrated electronics transforms the signal to a stan-

dardized analog signal.

6. Mechanical Connection

NMT

Mount the level meter with guide tube on the vessel.

Use a suitable flat gasket for screwing.

NBK-…T

The measuring transducer is installed and adjusted at the factory on the level

bypass tube.

NMT/NBK-T

NMT/NBK-T K05/0123 Seite 5

7. Electrical Inspection

Connect level meter according to the following wiring diagram:

GND

+Us

AGND

AOUT

4-20mA

24 V DC

Terminal assignments

GND: 0 V supply

+US: 24 VDC supply

AGND: analog output GND

AOUT: analog output 4-20 mA

8. Commissioning

The magnetostrictive level meter is ready for operation after mechanical and

electrical connection.

9. Maintenance

The instrument needs no maintenance when the measured medium is not

polluted.

Remove any dirt from guide tube and float with a suitable cleaning agent.

To dismantle the float, undo the retaining washer with the flat-head screw.

For installation after cleaning, secure the flat-head screw with a Locktite fluid to

prevent loosening.

NMT/NBK-T

Seite 6 NMT/NBK-T K05/0123

10. Technical Information

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

code on the device or via www.kobold.com

11. Order Codes

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

code on the device or via www.kobold.com

12. Dimensions

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

code on the device or via www.kobold.com

NMT/NBK-T

NMT/NBK-T K05/0123 Seite 7

13. 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

NMT/NBK-T

Seite 8 NMT/NBK-T K05/0123

14. EU Declaration of Conformance

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

responsibility that the product:

Magnetostrictive Level Meter model: NMT/NBK-…T

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

EN 61000-6-2:2005/AC:2005

Electromagnetic compatibility (EMC) - Part 6-3: Generic standards - Emission

standard for residential, commercial and light-industrial environments

EN 61000-6-3:2007/A1:2011

Electromagnetic compatibility (EMC) - Part 6-3: Generic standards - Emission

standard for residential, commercial and light-industrial environments

EN IEC 63000:2018

Technical documentation for the assessment of electrical and electronic products

with respect to the restriction of hazardous substances.

Also, the following EC guideline is fulfilled:

2014/30/EU EMC Directive

2011/65/EU RoHS (category 9)

Hofheim, 22 March 2023 H. Volz M. Wenzel

General Manager Proxy Holder

NMT/NBK-T

NMT/NBK-T K05/0123 Seite 9

15. UK Declaration of Conformity

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

responsibility that the product:

Magnetostrictive Level Meter model: NMT/NBK-…T

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

EN 61000-6-2:2005/AC:2005

Electromagnetic compatibility (EMC) - Part 6-3: Generic standards - Emission

standard for residential, commercial and light-industrial environments

EN 61000-6-3:2007/A1:2011

Electromagnetic compatibility (EMC) - Part 6-3: Generic standards - Emission

standard for residential, commercial and light-industrial environments

EN IEC 63000:2018

Technical documentation for the assessment of electrical and electronic products

with respect to the restriction of hazardous substances.

Also, the following UK guidelines are fulfilled:

S.I. 2016/1091 Electromagnetic Compatibility Regulations 2016

S.I. 2012/3032 The Restriction of the Use of Certain Hazardous

Substances in Electrical and Electronic Equipment

Regulations 2012

Hofheim, 22 March 2023

H. Volz M. Wenzel

General Manager Proxy Holder

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