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Kobold nbk-m Operating Instruction

Mini bypass level indicator
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Operating Instruction
Mini Bypass Level Indicator
Model: NBK-M
NBK-M_manual_3-4-04

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Summary of Contents for Kobold nbk-m

  • Page 1 Operating Instruction Mini Bypass Level Indicator Model: NBK-M NBK-M_manual_3-4-04...

  • Page 2: Table Of Contents

    13. Dimensions ....................14 Manufactured and sold by: Kobold Messring GmbH CANADA Nordring 22-24 Kobold Instruments, Inc. KOBOLD Instruments Canada Inc. D-65719 Hofheim 1801 Parkway View Drive 9A de l'Aviation Tel.: +49(0)6192-2990 Pittsburgh, PA 15228 Pointe Claire, QC H9R 4Z2...

  • Page 3: Note

    Please inspect the devices using the packing slip. All options are listed here. 4. Regulation Use Any use of the model: NBK-M which exceeds the manufacturers specification may invalidate its warranty. Therefore any resulting damage is not the responsibility of the manufacturer. The user assumes all risk for such usage.
  • Page 4 NBK-M 4.1. Bypass measuring tube system The bypass tube is attached at the side of the vessel with a connecting flange or a threaded coupling. The installation position is always vertical. The NBK should only be used for liquids with the medium density specified on the nameplate.

  • Page 5: Operating Principle

    5. Operating Principle The NBK-M is a bypass tube which is attached to the top and bottom of a vessel. The liquid level in the bypass tube will equalize with the liquid level in the vessel and will therefore will correspond to the level in the vessel to which it is attached.

  • Page 6: Mechanical Connection

    NBK-M 6. Mechanical Connection Remove bottom flange from bypass tube, and insert the cylindrical float in the NBK bypass tube with the designa- Standpipe tion "TOP" at the top. Re-position the Indicator gasket and close the bottom flange again; firmly tighten the flange bolts.

  • Page 7: Electrical Connection

    *Please note: The colors of internal cables are for internal connections only and therefore can only be seen in transducers with terminal box. When connecting transducer to a Kobold transmitter, for example models DFA, DST or DFM, please read the relevant operating instructions.

  • Page 8: Resistive Level Transducer With Transmitter (Option

    NBK-M Service in hazardous areas To operate the transducer in hazardous areas, the measuring circuit must contain the appropriate intrinsic safety barrier to separate intrinsically safe circuits from non-intrinsically safe circuits. Specially designed liquid level transducers with a total resistance of 40 k Ohm are required for this purpose. Only the resistive transducer (option W) can be installed in hazardous locations.

  • Page 9: Magnetostrictive Sensor With 4-Wire Transmitter (Option

    NBK-M 7.4. Magnetostrictive Pick-up with 4-wire Transmitter (option ..T..) • Ensure that the electrical supply lines are de-energized. • To avoid faults caused by electrical fields from other circuits, the cables should not be laid in conduits with power cables.

  • Page 10: Trouble Shooting

    NBK-M The float must pass the switch once in both directions so that the switching function is in line with the wiring diagram and table on page 10. Note that the switch cable must point downwards. These instructions are often ignored when an alarm lamp is connected and it is assumed that the switch is damaged.

  • Page 11: Technical Information

    NBK-M 10. Technical Information Bypass tube: Ø 40 mm (1.57”) Material: 1.4571/316 SS O-Ring (Ground flange): Buna-N (other materials as options) Operating pressure: PN 6/16/40 (87/232/580 PSIG) Service temperature: to 120°C (250°F) with polypropylene rollers to 200°C (390°F) with ceramic rollers Viscosity: max.
  • Page 12 NBK-M Resistance Transducer with 2-wire transmitter Output: 4-20 mA Auxiliary power: 16-32 V Load: –9 V) /0.02 A [Ω] Medium temperature: max. 130 °C (265°F) Ambient temperature: max. 80 °C (176°F) Protection type: IP 65/NEMA 4 Resolution: ±10 mm (0.4”) for measuring length < 78”...

  • Page 13: Order Codes

    NBK-M 11. Order Codes Model Nominal Pressure Connection Nominal Diameter Roller Indicator Transmitter Medium Density Optionsn 1= PN 6 10= DN 10 F= DIN Flange 0= without 0= without 8= from 0.8 g/cm³ 0= without NBK-M (not for ASME-Fl.) (only fori DIN Fl.)

  • Page 14: Dimensions

    NBK-M 13. Dimensions NBK-M with roller indication (millimeters) Dimension C [mm] for DIN V-Flange Model DN 10 DN 15 DN 20 DN 25 PN 6 PN 16 PN 40 Page 14 NBK-M_manual_3-5-04.doc...
  • Page 15 NBK-M NBK-M with roller indicator and magnetostrictive transmitter (millimeters) Dimension C [mm] for ASME V-Flange Model ½“ ¾“ 1“ 150 lbs 300 lbs Dimension C for R- or NPT thread: 60 mm Dimension A: Medium density 0,8 g/cm³: 285 mm Medium density 1,0 g/cm³: 180 mm...
  • Page 16 NBK-M 14. Options Display model ADI-B with bar graph, sturdy aluminum housing, mounted on bypass tube, for description, see brochure Z2 Display model ADI-K with bar graph and digital display, sturdy aluminum housing, mounted on bypass tube, for description, see brochure Z2...

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