Kobold NBK-ATEX Series Operating Instructions Manual
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Kobold NBK-ATEX Series Operating Instructions Manual

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Operating Instructions
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Bypass Level Indicator
Model: NBK-ATEX

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Summary of Contents for Kobold NBK-ATEX Series

  • Page 1 Operating Instructions Bypass Level Indicator Model: NBK-ATEX...

  • Page 2: Table Of Contents

    Transmitter LOM ................48     16.3 Limit contact RA (excerpt) ..............53     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: info.de@kobold.com Internet: www.kobold.com page 2 NBK-03 to -33 ATEX K10/0322...

  • Page 3: Note

    Please read these operating instructions before unpacking and setting 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.

  • Page 4: Instrument Inspection

    NBK-03 to -33 ATEX Classification according to Pressure Equipment Directive 2014/68/EU NBK-03 to NBK-33 Category assignment for not dangerous media (from diagram 2) Density Kategorie Category Category Category [kg/dm³] [bar] [mm] [mm] [mm] [mm] 4711 6000 6000 - / - NBK-03 0,9/0,8/0,7/ 4600...

  • Page 5: Bypass Measuring Tube System

    NBK-03 to -33 ATEX 4.1 Bypass Measuring Tube System The bypass tube is attached at the side of the vessel with a connecting flange or a threaded pipe. The installation position is always vertical. The NBK should only be used for liquids with the medium density specified on the nameplate. Otherwise the indication will deviate (float too high or submerged).

  • Page 6: Operating Principle

    NBK-03 to -33 ATEX 5. Operating Principle Kobold Bypass Level Indicators are used for continuous measurement, display and monitoring of liquid levels. The bypass tube is attached onto the side wall of the vessel. According to the law of communicating tubes the level in the bypass tube equals the level in the vessel.

  • Page 7: Mechanical Connection

    NBK-03 to -33 ATEX 6. Mechanical Connection Remove the bottom flange from the bypass tube, insert cylindrical float in the NBK bypass tube with the designation "TOP" upturned. Reposition the gasket and close the bottom flange again; firmly tighten with screws. Mount the bypass tube to the vessel to be monitored via the process connection and seal with...
  • Page 8 NBK-03 to -33 ATEX Mount and tighten the remote sensor - if available and not already mounted - on the bypass tube with the ribbon clamps. The remote sensor must fully cover both process connections. The cable terminal box is situated at the top. page 8 NBK-03 to -33 ATEX K10/0322...

  • Page 9: Electrical Connection

    NBK-03 to -33 ATEX 7. Electrical Connection Limit contacts NBK-RA Attention! Observe the allowed electrical ratings for the limit switch. NBK-RA Maximum values ATEX- contact Switching capacity: 45 W/VA Switching current: 0,6 A Switching voltage: 230 V AC/DC Install the switch (if available) according to the diagram and connect it to the electrical controller.

  • Page 10: Wiring Diagram

    NBK-03 to -33 ATEX Wiring Diagram  Ensure that the electrical supply lines are powerless.  To avoid faults caused by electrical fields from other circuits, the cables should not be installed adjacent to other high voltage power lines.  Unscrew cover and run supply lines through cable gland. ...
  • Page 11 NBK-03 to -33 ATEX 7.2.2 Reed Contact Chain TRANSMITTER Output (Options ...E/...R/...B/...L/...K/...N) 7.2.3 Reed Contact Chain TRANSMITTER Output with display LED display (option …L/…K + option LE or KE) LCD display (option ...L/...K +option LC or KC) (ii) For programming instructions of different transmitter models please consult separate instruction manuals of respective transmitters.
  • Page 12 NBK-03 to -33 ATEX Electrical connection in intrinsically safe mode Ex ia Electrical connection in explosion-proof safe mode Ex d page 12 NBK-03 to -33 ATEX K10/0322...

  • Page 13: Safety Instructions

    NBK-03 to -33 ATEX 7.3 Safety Instructions 7.3.1 Area of validity These safety instructions apply to MM…E Series of magnetic level switch for use in explosion-proof atmospheres conforming to CE certificate LOM 06ATEX2054 X and MM…F Series conforming to CE certificate LOM 14ATEX2075 X 7.3.2 Guidelines These safety instructions must be applied to the MM…E and MM…F Series used in...
  • Page 14 Maintenance and repairs The instrument does not require maintenance or servicing. By measuring substances, which tend to deposit and contamination, cleaning may be necessary. Repairs must be only carried out by Kobold Mesura (manufacturer). 7.3.6 Storage Measuring instruments should be protected against humidity and dust.

  • Page 15: Ground Connection For Atex Models

    NBK-03 to -33 ATEX 7.4 Ground connection for ATEX models The bypass has to be integrated into the potential equalisation system of the installation. This can be carried out through the earth terminal which is shown in the following drawing: Potential equalisation NBK-03 to -33 ATEX K10/0322 page 15...

  • Page 16: Commissioning

    NBK-03 to -33 ATEX 8. Commissioning Because of the setting behaviour of seals, all screw connections must be retightened. Fill vessel and switch on electrical controller, if available. If there are gate valves between bypass process connection and tank, first slowly open the upper valve (pressure equalisation) and then the lower valve (liquid side).

  • Page 17: Trouble Shooting

    NBK-03 to -33 ATEX 9. Trouble Shooting Error: The tank is full but there is no indication  Check that both flanges (process connection), top and bottom, are open to the vessel, and that the bypass tube fills with liquid. ...

  • Page 18: Technical Information

    NBK-03 to -33 ATEX Technical Information Process Connection: flange DIN EN 1092-1, type 11, form B, DN 15, DN 20, DN 25, DN 32 DN 40, DN 50, Flange ASME B 16.5 RF-2009 ½”, ¾”, 1”, 1¼”, 2” R-Thread DIN EN 10226-1 ½“, ¾”, 1”, 1¼”...
  • Page 19 NBK-03 to -33 ATEX Ball display model KP (max. length 3800 mm one-piece)* Material ball: Sight tube: PMMA Sealing plug: Aluminium Seal: Ball support rail: Aluminium, black anodised Carrier frame: Stainless steel 1.4301 Scale: PVC, stainless steel 1.4301 (option MV) Medium temperature: -20...+80 °C Ambient temperature:...
  • Page 20 NBK-03 to -33 ATEX ATEX approval ATEX limit contact, model NBK-RA Contact operation: bistable changeover contact encapsulated Switching hysteresis: approximately 15 mm Max. switching capacity: 45 VA; 230 V ; 0.6 A AC/DC Temperature class: T5 / T6 Max. ambient temperature: 70 °C / 85 °C Connection: 3 m PVC cable...
  • Page 21 NBK-03 to -33 ATEX Option E Transmitter model: 5333D Common specifications: Power supply: 8.0...35 V Communication interface: Loop Link 5905 Linear resistance input: 0...10 kΩ Current output: Signal range: 4...20 mA Min. signal range: 16 mA Updating time: 135 ms Load resistance: ≤(V -8)/0.023 [Ω]...
  • Page 22 NBK-03 to -33 ATEX Current output: Signal range: 4...20 mA Min. signal range: 16 mA Updating time: 440 ms Load resistance: ≤(V -8)/0.023[Ω] supply Sensor error detection: Programmable: 3.5...23 mA 23 mA (factory default) Data for intrinsically safe current circuit: see instruction manual ATEX approval transmitter: KEMA 03ATEX1537:...
  • Page 23 NBK-03 to -33 ATEX Option B Transmitter model: 5350B Common specifications: Power supply: 9...32 V Consumption: <11 mA Isolation voltage, test/operation: 1.5 kV /50 V Signal/noise ratio: min. 60 dB Response time (programmable): 1...60 s Updating time: <400 ms Dimensions: ø44x20.2 mm Linear resistance input: 0...10 kΩ...
  • Page 24 NBK-03 to -33 ATEX Option L Transmitter model: 5333D Common specifications: Power supply: 8.0…35 V Communication interface: Loop Link 5905 Linear resistance input: 0…10 kΩ Current output: Signal range: 4…20 mA Min. signal range: 16 mA Updating time: 135 ms Load resistance: ≤(V -8/0.023 [Ω]...
  • Page 25 NBK-03 to -33 ATEX LED or LCD display (options KE/KC): Power supply: loop powered Voltage drop: LED 3.3 V at 4 mA 3.7 V at 20 mA LCD max. 2.5 V Medium temperature: -40...+120 °C (with option N up to 250 °C) Ambient temperature: -40...+80 °C Resolution:...

  • Page 26: Options

    NBK-03 to -33 ATEX Options Code Description Sketch/picture Availability Top bypass tube connections NBK-03/06/07 Without vent plug NBK-10/31/32/33, standard NBK-10 With vent plug G ½ NBK-03/06/07, standard Flange connection DN50 (pressure rating as process NBK-03/06/07/10 flange) Flange connection 2” ASME NBK-03/06/07/10 (pressure rating as process flange) Vent flange DN15, stainless steel 1.4571...
  • Page 27 NBK-03 to -33 ATEX Code Description Sketch/picture Availability Drain valve NAD-MMR15, G ½, stainless steel 1.4571, NBK-03/06 max. temp.: +120 °C Drain valve NAD MMN15, ½” NPT, stainless steel NBK-03/06 1.4571 (316 Ti), max. temp.: +120 °C Drain socket DN15 see sketch NBK-03 Drain valve NAD-MMN15, ½”...
  • Page 28 NBK-03 to -33 ATEX Code Description Sketch/picture Availability Additional options Connection flange for 2-part version (not possible with see sketch NBK-03/06/07/10 sensor), split roller display and scale possible. Retaining plate, centric between process connections, NBK- see sketch 03/06/07/10/31/32/33 necessary from L5000 mm (alternative option HF) Retaining flange, centric between process connections, NBK- see sketch...
  • Page 29 NBK-03 to -33 ATEX Option ST Option TS Option A Model Dimension X NBK-03 NBK-06 NBK-07 NBK-10 Option HL Option HF (centred to dimens.) (centred to dimens. L) Options process connection Option F/A Option R/N Option S NBK-03 to -33 ATEX K10/0322 page 29...
  • Page 30 NBK-03 to -33 ATEX Measuring scale, Measuring scale, Aluminium Screen print st. steel carrier Option M1 – engraved scale (standard scope of supply with Option M2 – polyester toil ball display) Float models (closed design) Model min. density Material [kg/dm Titan Titan Titan...

  • Page 31: Order Codes

    NBK-03 to -33 ATEX Order Codes ATEX-version only NBK-03...NBK-10 Order Details (Example: NBK-03 F15 00 1 A0) Rated Roller/ Sensor/ Model Connection Nominal size Medium density float Options pressure ball indicator Transmitter 1 = without electrical attached parts ATEX - II 1G / 2G D NBK-03 PN16/Class 150 2* = with reed contact chain...

  • Page 32: Dimensions

    NBK-03 to -33 ATEX Dimensions NBK-ATEX-version reed chain Model 2 Dimension NBK Model Rated pressure ø Dimensions [mm] NBK-10/-31/-32/ -33 always NBK-03... PN16/Class 150 without vent plug NBK-06... PN40/Class 300 60.3 and without drain NBK-07... PN63/Class 400 plug NBK-10... PN100/Class 600 NBK-31…...
  • Page 33 At intermediate temperatures e.g. 120 °C, a linear interpolation is to be carried out between 2 following creep resistance values, e.g. of 100 °C and 150 °C. The pressure/temperature assignment is valid for the following flange models with sizes up to DN 100 used by KOBOLD. Model No. and nomination: 05 Blind flange, 11 Welding neck flange...
  • Page 34 NBK-03 to -33 ATEX NBK-...with thermal screen option N NBK-...with transmitter options E/R/B/4/L/K/N (not possible with options VA/VF) NBK-...with transmitter options NBK-... with transmitter 2/E/R/B/4L/K/N and option MU options 2/E/R/B/4/L/K/N and option MS page 34 NBK-03 to -33 ATEX K10/0322...
  • Page 35 NBK-03 to -33 ATEX NBK-...with transmitter options NBK-...with transmitter options E/R/L/K and display options E/R/L/K and display LE/KE or LC/KC option LE/KE or LC/KC and option S NBK-… with transmitter NBK-… with transmitter model E/R/B/L/K/N option ST E/R/B/L/K/N option TT NBK-03 to -33 ATEX K10/0322 page 35...
  • Page 36 NBK-03 to -33 ATEX NBK-… with transmitter display options LE/KE or LC/KC and option TT NBK-RA page 36 NBK-03 to -33 ATEX K10/0322...

  • Page 37: Ec Declaration Of Conformance

    NBK-03 to -33 ATEX EC Declaration of Conformance We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare that the bypass level indicators fulfil the following standards: EC type Pressure Category Model examination stage as per PED certificate NBK-03 PN 16 88 254-12 HH...
  • Page 38 NBK-03 to -33 ATEX Also the following EC guidelines are fulfilled: 2014/30/EU EMC Directive 2014/35/EU Low Voltage Directive 2011/65/EU RoHS (category 9) 2014/68/EU  Category III (IV) Diagram 1, vessel, group 1 dangerous fluids  Module D, marking CE0575  Notified body: DNV GL ...
  • Page 39 NBK-03 to -33 ATEX NBK-03 to -33 ATEX K10/0322 page 39...

  • Page 40: Certificates

    NBK-03 to -33 ATEX Certificates 16.1 NBK-EXAM page 40 NBK-03 to -33 ATEX K10/0322...
  • Page 41 NBK-03 to -33 ATEX NBK-03 to -33 ATEX K10/0322 page 41...
  • Page 42 NBK-03 to -33 ATEX page 42 NBK-03 to -33 ATEX K10/0322...
  • Page 43 NBK-03 to -33 ATEX NBK-03 to -33 ATEX K10/0322 page 43...
  • Page 44 NBK-03 to -33 ATEX page 44 NBK-03 to -33 ATEX K10/0322...
  • Page 45 NBK-03 to -33 ATEX NBK-03 to -33 ATEX K10/0322 page 45...
  • Page 46 NBK-03 to -33 ATEX page 46 NBK-03 to -33 ATEX K10/0322...
  • Page 47 NBK-03 to -33 ATEX NBK-03 to -33 ATEX K10/0322 page 47...

  • Page 48: Transmitter Lom

    NBK-03 to -33 ATEX 16.2 Transmitter LOM page 48 NBK-03 to -33 ATEX K10/0322...
  • Page 49 NBK-03 to -33 ATEX NBK-03 to -33 ATEX K10/0322 page 49...
  • Page 50 NBK-03 to -33 ATEX page 50 NBK-03 to -33 ATEX K10/0322...
  • Page 51 NBK-03 to -33 ATEX NBK-03 to -33 ATEX K10/0322 page 51...
  • Page 52 NBK-03 to -33 ATEX page 52 NBK-03 to -33 ATEX K10/0322...

  • Page 53: Limit Contact Ra (Excerpt)

    NBK-03 to -33 ATEX 16.3 Limit contact RA (excerpt) NBK-03 to -33 ATEX K10/0322 page 53...
  • Page 54 NBK-03 to -33 ATEX page 54 NBK-03 to -33 ATEX K10/0322...
  • Page 55 NBK-03 to -33 ATEX NBK-03 to -33 ATEX K10/0322 page 55...
  • Page 56 NBK-03 to -33 ATEX page 56 NBK-03 to -33 ATEX K10/0322...
  • Page 57 NBK-03 to -33 ATEX NBK-03 to -33 ATEX K10/0322 page 57...

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