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Kobold NBK Operating Instructions Manual

Bypass level indicator
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Operating Instructions
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Bypass Level Indicator
Model: NBK

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Summary of Contents for Kobold NBK

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

  • Page 2: Table Of Contents

    4.4. Remote Sensor with Magnetostrictive Pick-Up (option ..T..)....5 5. Operating Principle..................5 6. Mechanical Connection.................7 7. Electrical Connection ..................9 7.1. Limit contacts NBK-R, NBK-RT ............9 7.2. Remote Sensor: Reed Contact Chain of Resistors (option ..W..) ..10 7.3. Remote Sensor: Chain of Resistors with 2-wire Transmitter (option ..M..)..................11 7.4.

  • Page 3: Note

    NBK-10 <= 107 Art.3, Para.3 Art.3, Para.3 NBK-10 <= 215 Art.3, Para.3 NBK-10 <= 858 NBK-10 <=4292 NBK-10 <= 6500 NBK-12; 13; 14 <= 1470 Art.3, Para.3 Art.3, Para.3 NBK-12; 13; 14 <= 2974 Art.3, Para.3 NBK K01/0906 page 3...

  • Page 4: Instrument Inspection

    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.

  • Page 5: Electrical Limit Switches (Option)

    4.2. Electrical Limit Switches (option) The optional electrical limit switches serve to signal a preset level. NBK-R: Bistable changeover contact fitted in a polycarbonate housing with 3m connection cable NBK-RT200/-RT400: Bistable changeover contact fitted in an aluminium die cast housing with terminal connectors 4.3.
  • Page 6 Ex II (1) G [EEx ia] IIC GL version In the pressure stages PN 16 (NBK-03) and PN 40 (NBK- 06) the bypass level indicators are available with GL approval (Germanischer Lloyd). The magnetic roller indication as well as limit contacts and a reed contact chain can be delivered for level indication and evaluation .

  • Page 7: Mechanical Connection

    6. Mechanical Connection Remove bottom flange from bypass tube, and insert the cylindrical float in the NBK bypass tube with the designa- tion "TOP" at the top. Re-position the gasket and close the bottom flange again; firmly tighten with screws.
  • Page 8 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 K01/0906...

  • Page 9: Electrical Connection

    Valid regulations hazardous areas, Connection box regulations for installation (DIN/VDE 0165), should be observed when installing the NBK level indicator NBK-RT in zone 1 or 2 hazardous areas (no combustible liquids). NBK K01/0906 page 9...

  • Page 10: Remote Sensor: Reed Contact Chain Of Resistors (Option

    *Please note: The colours of internal cables are for internal connections only and therefore are only visible in transmitters with terminal connection box. When connecting remote sensors to a Kobold transmitter, for example models DFA, DST or DFM, please read the relevant operating instructions. page 10...

  • Page 11: Remote Sensor: Chain Of Resistors With 2-Wire Transmitter (Option

    • Unscrew cover and run supply lines through cable gland. • Connect the remote sensor to the electronics according to the wiring diagram below. 16-32 V DC NBK K01/0906 page 11...

  • Page 12: Remote Sensor: Magnetostrictive Sensor With 4-Wire Transmitter (Option

    • Unscrew cover and run supply lines through cable gland. • Connect the remote sensor to the electronics according to the terminal con- nection diagram below. 24 VDC 4-20 mA ± 20% Aout AGND +US GND 24 V DC AGND 4-20 mA AOUT page 12 NBK K01/0906...

  • Page 13: Commissioning

    Hysteresis Hysteresis is the difference between contact closing and opening points. A hysteresis of approximately 15 mm float travel is achieved by factory tuning of the float magnet and contact strength. NBK K01/0906 page 13...

  • Page 14: Trouble Shooting

    The bypass tube can now be mechanically cleaned. The inspection window for the roller indication is made of high-quality plexiglass (glass for high-temperature display). It should be cleaned with a suitable cleaning agent. The indicator requires no further maintenance. page 14 NBK K01/0906...

  • Page 15: Technical Information

    Max. measuring length: up to 6000 mm: single-part, >6000 mm: two-part or multipart Overall length: see dimension drawing Technical Information for additional components Limit contacts model NBK-R Contact operation: bistable changeover contact Switching hysteresis: approximately 15 mm Max. switching capacity: 60 W/VA;...
  • Page 16 4-20 mA Power supply: 24 V , max. 150 mA Load: max. 500 Ω Max. length: 4000 mm Medium temperature: max. 120 °C Ambient temperature: max. 80 °C Accuracy: ± 1mm Housing: Aluminium pressure-cast Protection: IP 65 page 16 NBK K01/0906...

  • Page 17: Options

    • F2- drain valve NAD-MZ15 1/2 NPT, stainless steel 1.4571 • H3- rinsing connection DN15, PN16, top and bottom for NBK-03 • H4- rinsing connection 1/2" ANSI, 150 lbs, top and bottom for NBK-03 • K- Armaflex insulation (thermal conductance 0.025 kcal/m °C, up to 105 °C) •...

  • Page 18: Order Codes

    13. Order Codes Order Details (Example: NBK-03 F15 00 0 A) Nominal Roller Medium density Model Connection Nominal size Transmitter pressure indication Float A=1.0 kg/dm , titanium 0 = without transmitter NBK-03... F=DIN flange 15=DN 15, " 00= without B=0.90 kg/dm...

  • Page 19: Dimensions

    Ventilation screw 73,15 O 60,3 Drain screw Dimensions NBK Dimensions [mm] NBK 10 always without ventilation Model Nominal pressure screw and drain screw. PN 16 / 150 lbs NBK-03... NBK-06... PN 40 / 300 lbs NBK-07...

  • Page 20: Declaration Of Conformance

    43 626-02 HH NBK-07 PN 100 43 627-02 HH NBK-10 The limit contact for bypass level indicators NBK-R , NBK-RT are in conformity with the standards noted below: DIN EN 61010-1 1994-03 Safety requirements for electrical measuring, control and laboratory instruments...
  • Page 21 Low voltage guideline 89/336/EWG Electromagnetic compatibility 97/23/EG Category III (IV), Table 1, pipe, Group 1 dangerous fluids Module B+D, mark CE0098 Notified body: Germanischer Lloyd Germany Hofheim, 04. June 2004 H. Peters M. Wenzel General Manager Proxy Holder NBK K01/0906 page 21...

This manual is also suitable for:

Nbk-01Nbk-04Nbk-06Nbk-03Nbk-10Nbk-07 ... Show all

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