Kobold NIR-9 User manual

Operating Instructions
For
Rotating Vane Level
Switch
Model NIR-9 / NIR-E9

NIR.9
Page 2 DT0471
1. Contents
1. Contents........................................................................................................2
2. Note ..............................................................................................................3
3. Instrument Inspection....................................................................................3
4. Description ....................................................................................................3
5. Operating Principle........................................................................................3
6. Mechanical connection..................................................................................4
7. Electrical connection .....................................................................................6
7.1 Signal Output .......................................................................................6
7.2 Sensitivity Adjustment..........................................................................7
8. Technical Data ..............................................................................................8
9. Dimensions ...................................................................................................9
9.1 Side installation....................................................................................9
9.2 High temperature design....................................................................10
9.3 Top installation. Flexible cable extension...........................................10
9.4 Top installation. Rigid extension ........................................................11
10. Accessories/Spare parts .............................................................................12
10.1 Vanes.................................................................................................12
10.2 Mechanical connections:....................................................................13
10.3 Extensions .........................................................................................14
11. Order Details...............................................................................................15
11.1 Spare parts/Accessories model NMZ ................................................16
12. Safety Instructions (ATEX)..........................................................................17
12.1 Area of validity ...................................................................................17
12.2 Guidelines..........................................................................................17
12.3 Protection against E.S.D. ( Electro Static Discharge ) .......................18
12.4 Chemical resistance...........................................................................18
12.5 Maintenance and repairs ...................................................................18
12.6 Storage ..............................................................................................18
13. Installation in hazardous zone.....................................................................19
14. ATEX Label Description ..............................................................................19
15. Declaration of conformity ( ATEX )..............................................................20
16. Declaration of conformity ............................................................................21
17. ATEX Certificate..........................................................................................22
18. Notes...........................................................................................................28
Manufactured by:
Kobold Mesura S.L.U
Guifré 655 1ª Planta
08918 Badalona
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com
Edition: january 2012

NIR.9
DT0471 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 devices have 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.
3. Instrument Inspection
Instruments are inspected before shipping and sent out in perfect condition.
Scope of delivery:
The standard delivery includes:
•Rotating level switch
•Operating instructions
4. Description
This level switch instrument for solids NIR-9, has been designed to be used in all
applications where the level of solids must be detected in tanks and silos.
Example: Grain, cereal, flour, granulated plastics, cement, sand, feed, perlite,
etc.
5. Operating Principle
A synchronous motor whit a low revolution drives a rotating vane. When material
reaches the rotating vane , its rotation is blocked. The restoring force moves the
pivoted motor away from its original position, acting a micro-switch contact
closure, wich gives out an alarm signal. A second micro-switch turns off the
motor.
When the filling level decrease from the rotating vane, a spring draws the motor
back into operation position, the micro-switch returns to operating position, and
the motor is switched back on.
A LED shows that the supply voltage is applied.

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6. Mechanical connection
NIR is normally mounted into the tank top (full level) or through the tank wall (full,
middle or empty level).
For side installation do not use NIR with mechanical extension (except NIR-96 /
NIR-E96).
NIR can be installed through a standard G1”, 1 1 ¼” G, G1 ½”, flange
F1 Ø110 mm and flange F2 Ø200 mm. (Other connections under request).
Switch level with mechanical extension can only be placed in the top.
There is a reinforced model NIR-93 available to be mounted as empty level or
middle level in big tanks and when the bulk density is superior to 1gr/cm3.
Notes:
Ensure cable gland faces
downward to avoid water
intrusion
In case of heavy material
loads and falling material
provide angled protection
Ensure vane is out of any
place where build-up may
occur
Head 360º rotatable

NIR.9
DT0471 Page 5
6.1 Installation
Caution: Never mount the instrument in
region of falling material without an angled protection.
In this case NIR is mounted Caution: Avoid water intrusion.
out of falling material.

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Page 6 DT0471
7. Electrical connection
WARNING! Be sure that power supply corresponds with the
indicated in the equipment´s label.
The supply voltage is connected to terminals L(+) and N(-).
It is very important in case of continuous voltage, to respect the polarity. The
device has polarity protection.
Place fuse of 0,25A in serial with the power, and fuse (max. 2 A) to protect the
alarm contact.
The green LED indicates that the equipment is powered.
Rotary level switch NIR has potential-free changeover contact.
Provide protection for output contact to protect the device against spikes if there
are inductive loads connected.
7.1 Signal Output

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DT0471 Page 7
7.2 Sensitivity Adjustment
NIR has 3 positions of sensitivity adjustment: high, medium and low (factory
setting is medium).
To adjust the sensitivity, be sure that the material reaches the rotation vane, if
the motor is running it is necessary to increase the sensibility until the motor is
stopped. With the optional vanes, sensitivity can be also improved.
Bulk densities with different vanes*:
Vane type High sensibility Medium sensibility Low sensibility
N y R 0,14 gr/cm³ 0,185 gr/cm³ 0,214 gr/cm³
V 0,038 gr/cm³ 0,047 gr/cm³ 0,057 gr/cm³
X 0,04 gr/cm³ 0,05 gr/cm³ 0,06 gr/cm³
A 0,45 gr/cm
3
0,55 gr/cm
3
0,65 gr/cm
3
*Approx. Data

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8. Technical Data
Note: Kobold Mesura makes every attempt to ensure the accuracy of these
specifications but reserves the right to change them at any time.
Power supply: 24 Vdc (18…36 Vdc)
24 Vac ±10% 50/60Hz
48 Vac ±10% 50/60Hz
110 Vac ±10% 50/60Hz
230Vac ±10% 50/60Hz
Electrical connection:wire size Ø2,5 mm2
Power consumption: Max. 2VA
Contact: SPDT max. 250Vac, 2A (125VA max.).
Conduit entry: 2 cable gland M20x1,5, ATEX version
1 cable gland and 1 plug M20x1,5 standard version
Sensibility: Adjustable in 3 points: Low, Medium, High.
Max. grain size: 50 mm
Min. bulk density: 38 g/l depending on vane type. Others on request
Process connection: 1“ G aluminum mod. NIR-94, NIR-E94
1“ G st. st. 1.4305 ( AISI 303 )
1 ½“ G st. st. 1.4305 ( AISI 303 )
1 ¼ “ G st. st. 1.4305 ( AISI 303 )
Flange Ø110 mm 1.4305 ( AISI 303 )
Flange Ø200 mm 1.4305 ( AISI 303 )
Process temperature: -20…+90ºC
-20…+200ºC ( NIR-92, NIR-E92 )
Ambient temperature: -20 … +60ºC
Pressure: - 0.5….+0,5 bar.
Protection type: IP66
Housing: Polyester coated aluminum
Rotatable 360º. Threaded cover
Extensions and vanes: st. st. 1.4301 ( AISI 304 ), 1.4305 ( AISI 303 )

NIR.9
DT0471 Page 9
9. Dimensions
9.1 Side installation
NIR-E910…G6… NIR-E930…G8…
NIR-910…G6… NIR-930…G8…
NIR-E940…G6… NIR-E9620…G6…
NIR-940…G6… NIR-962…G6…

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9.2 High temperature design
NIR-E9200…G6…
NIR-9200…G6…
9.3 Top installation. Flexible cable extension
NIR-E95L0…G6…
NIR-95L0…G6…