Kobold NZJ Bedienungsanleitung

Operating Instructions

for

By-pass level indicator

Model: NZJ

NZJ

page 2 NZJ K03/0522

1. Contents

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

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

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

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

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

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

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

7.1.Capacitive switch (option) .................................................................... 5

8.Operation ...................................................................................................... 5

9.Maintenance ................................................................................................. 6

10.Technical Information .................................................................................... 7

11.Order Codes ................................................................................................. 8

12.Dimensions ................................................................................................... 9

13.EU Declaration of Conformance ................................................................. 10

14.EU Declaration of Conformance (contact) ................................................... 11

Manufactured by: Sold by:

Kobold-Unirota Ltd. Kobold Messring GmbH

4400 Nyíregyháza Nordring 22-24

Derkovits út 132-136. D-65719 Hofheim

Tel.: +36-42-342-215 Tel.: +49(0)6192-2990

Fax: +36-42-500-175 Fax: +49(0)6192-23398

E-Mail: [email protected] E-Mail: [email protected]

Internet: www.unirota.hu Internet: www.kobold.com

NZJ

Model NZJ K03/0522 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.

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.

as per PED 2014/68/EU

In acc. with Article 4 Paragraph (3), "Sound Engineering Practice", of the PED

2014/68/EU no CE mark.

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:

 By-pass level indicator: NZJ

 Capacitive switch (option)

4. Regulation Use

Any use of the device, which exceeds the manufacturer’s specification, may

invalidate its warranty. Therefore, any resulting damage is not the responsibility of

the manufacturer. The user assumes all risk for such usage.

NZJ

page 4 NZJ K03/0522

5. Operating Principle

The Kobold Unirota NZJ model by-pass level indicator works on the basis of the

intercommunicating vessels principle. The NZJ type glass tube level indicator is

applicable for the indication of liquid level in small and middle-sized, standing or

lying round containers used in food, pharmaceutical and chemical industries. The

level of the liquid in the glass tube of the appliance is the same with the level in

the round containers. The level of the liquid can be seen through the sight glass.

The loads occurring at the installation is absorbed by the fixing device, thus the

glass tube is protected against breaking. The fixing device also protects the

glass tube against the mechanical impacts that may occur following the

installation. We recommend that the normal design level indicators be fitted on

vessels containing pure liquids, while the indicators mounted with cleaning

stubs (a low, or low-top stub) be fitted on containers filled with contaminated

liquid.

6. Mechanical Connection

Before installation:

•

Remove all transportation safety locks and ensure that no packing material

remains within the unit.

•

Be sure that the maximum allowable operating pressure and temperature is

not exceeded (see Technical data).

•

Install the by-pass level indicator at the side of the round containers, ensure

the instrument is under no mechanical stress/tension (install support bracing if

necessary).

•

Protect the measuring tube from external damage.

•

Avoid pressure peaks in the measuring tube, e.g. from sudden surges or

stoppage of flow.

•

If possible, immediately after making mechanical connections, check whether

the connections are properly sealed with no evidence of leakage.

•

Make sure that the connections are in plain.

NZJ

Model NZJ K03/0522 page 5

7. Electrical Connection

7.1. Capacitive switch (option)

8. Operation

Capacitive proximity switches are designed for non-contact and wear-free

detection of metal (electrically conductive) and nonmetal (electrically non-

conductive) objects.

Installing of the capacitive switch

 Slide the switch housing up until the glass tube is empty under the switch.

 Set the switching state LED off by adjusting the potentiometer located the end

of the switch.

 Slide the switch housing down until the glass tube is full under the switch.

 The LED must be on. If not, repeat the process from the first step util the LED

on.

Adjustment of limit-values

The switch-point can be adjusted to the desired levels by using the clamping screw

on the holder of switch.

Reference edge: approx. the middle of the sensor.

Slide the switch housing up or down until the reference edge coincides with the

desired switch- point scale reading.

pnp BK

NZJ

page 6 NZJ K03/0522

9. Maintenance

If the medium to be measured is clean, the series NZJ is virtually maintenance-

free.

If deposits form is on the inner housing or parts, periodic cleaning of the unit is

recommended.



Remove the units from the container with a suitable tool.



Screw the side flats out.



Clean the glass tube with a suitable cleaning.



Do the reassembly in reverse order.

NZJ

Model NZJ K03/0522 page 7

10. Technical Information

Installation position: vertical

Installation length: 100…540 mm

Measuring length: 60…500 mm

Material: stainless steel (1.4301/1.4404) / Alu

Gasket: NBR, FPM, EPDM, PTFE

Process connection: G ¼, ¼” NPT (male) union nut

Scale resolution: 2 mm on stick foil

Max. pressure: 16 bar

Ambient temperature: -25...+70 °C

Medium temperature: 0 °C...+100 °C (0° C...+70 °C with switch)

Density: any (no float used)

Max. viscosity: 50 mm²/s

Limit contacts

Type: capacitive sensor (without ATEX)

Operating Voltage UB: 10...65 VDC

Short-circuit protection: pulsing Voltage drop UD: ≤ 1.8 V

Operating current IL: ≤ 200 mA

No-load supply current I0: ≤ 15 mA

Output function: 3-wire, N/O-contact, PNP

Connection type: Ø

5.2 mm, LifYY, PVC, 2 m

Core cross-section: 3 x 0.34 mm2

Fine adjustment: via potentiometer

Switching indication: LED, yellow

Protection: IP67

Material combinations

Code Tube Body Connection Seal

NZJ-A

borosilicate

glass

aluminum

1.4404

NBR

NZJ-K stainless steel 1.4301 FPM

NZJ-S stainless steel 1.4404 FPM

NZJ

page 8 NZJ K03/0522

11. Order Codes

Model Version Seals Connection Switch Option

NZJ-A

NZJ-K

NZJ-S

0 = without scale

1 = with scale in mm

2 = with scale in %*

1 = FPM

3 = EPDM

4 = NBR

5 = PTFE

G2 = G” ¼

N2 = ¼ NPT

00 = without

= 1x N/O

= 2x N/O

= 1x N/O

= 2x N/O

0 = without

Y = customer

specification

*Please specify the 0% and 100% level relative to the bottom and top connection level in clear text.

1) Ideal for water, water-based solutions and solvent-based liquids.

2) Ideal for oils, greases, lubricants, inks, acids, sauces, water-based alkalis and cleaning agents.

NZJ

Model NZJ K03/0522 page 9

12. Dimensions

L+ 20

L‐ 58

max.

min.

L‐

NZJ‐12110

NZJ

page 10 NZJ K03/0522

13. EU Declaration of Conformance

We, KOBOLD Unirota Kft. Nyíregyháza Hungary, declare under our sole

responsibility that the product:

By-pass level indicator Model: NZJ-…

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

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 guidelines are fulfilled:

2011/65/EU RoHS (category 9)

2015/863/EU Delegated Directive (RoHS III)

Nyíregyháza, 10 May 2022

Dénes Szabó

General Manager

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