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Kobold NWS Operating Instructions Manual

Level switch tuning fork principal
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Operating Instructions
for
Level Switch
Tuning Fork Principal
Model: NWS

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Summary of Contents for Kobold NWS

  • Page 1 Operating Instructions Level Switch Tuning Fork Principal Model: NWS...

  • Page 2: Table Of Contents

    3.  Instrument Inspection ..................4  4.  Intended Use ....................5  5.  Operating Principle ..................6  5.1  Foreseeable Misuse ................6  6.  Use in Hazardous Areas (NWS-2E) .............. 7  6.1  Device function ..................7  6.2  Commissioning/Installation ..............7  6.3  Designation ..................8 ...

  • Page 3: Note

    If you need an instruction manual that corresponds to the purchased product version, you can request it from us free of charge by email (info.de@kobold.com) 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.

  • Page 4: Instrument Inspection

    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:  Level Switch model: NWS page 4 NWS K23/0325...

  • Page 5: Intended Use

     Pollution degree 2 In addition to the above, the following applies to devices with a mains voltage supply:  Fluctuations in the mains supply voltage up to 10 % of the nominal voltage;  Overvoltage category II NWS K23/0325 page 5...

  • Page 6: Operating Principle

    The liquid viscosity of up to 5000 mm²/s (cSt) can increase the response time. The NWS switches are ideal for hygienic and sterile applications and are designed for CIP cleaning up to 150°C.

  • Page 7: Use In Hazardous Areas (Nws-2E)

    6. Use in Hazardous Areas (NWS-2E) 6.1 Device function The intrinsically safe NAMUR oscillating fork sensor is used to detect the fill levels of combustible and non-combustible liquids. The sensor is supplied with current from a switching amplifier with an intrinsically safe output circuit in accordance with the NAMUR specification and behaves accordingly when the oscillating fork is dampened by liquid or can oscillate freely.

  • Page 8: Designation

    6.3 Designation Model: NWS***2E* **** II 1 G Ex ia IIC T6 Ga BVS 03 ATEX E 119 IECEx BVS 13.0004 Identification number: 0158 Production-No.: SN: E999999 (consecutively numbered) 6.4 Temperature resistance The values for ambient temperatures ranging from -20 °C up to the values indicated in the following table apply to this sensor, depending on the max.

  • Page 9: Mechanical Connection

    When working on electrical and pneumatic plants, the special safety requirements shall be observed. The NWS switch can be installed in containers or piping by screwing it into a threaded mounting flange or other type of mounting device. The threaded con- nection must be sealed with Teflon (PTFE) tape.
  • Page 10 10 NWS K23/0325...

  • Page 11: Electrical Connection

    - The outer cable diameter must correspond to the specified clamping range of the cable gland - The conductor cross-section and dielectric strength of the cable must cover the maximum electrical connection values of the device - Fire NWS K23/0325 page 11...

  • Page 12: Nws

    IEC 60332.2. We recommend H03VV-F 3x 0.5 mm2 as a flexible connection cable. Series wiring with a 2-wire connection There is a risk of suffering a life-threatening electric shock if the NWS-...200 is connected without first disconnecting it from the mains! Danger Please note: ...
  • Page 13 NWS K23/0325 page 13...
  • Page 14 "OFF" threshold voltages. If you should have problems with this set- ting, please contact us for assistance. Wiring diagram: 3-wire, V = 24 V output PNP: U ~ 20 V; U ~ 3.5 V; I ≤ 400 mA HIGH page 14 NWS K23/0325...

  • Page 15: Nws

    +Vs(n.o.) / GND +Vs (n.o.) blue GND / +Vs (n.c.) black Switch Out +Vs (n.c.) GND (n.o.) Switch Wiring diagram NWS-2ES.. (NAMUR, ATEX, 2-wire, 8.2 V Lead-/Pinnumber NWS-...2EF (n.o.) +S (n.o.) ground (n.c.) +S (n.c.) NWS K23/0325 page 15...

  • Page 16: Settings

    The LED provides visual confirmation that the NWS is operating correctly and that the status of the wet side is correctly displayed. With its oper- ating mode switch, the NWS can be set to operate as either an N/C contact or an N/O contact.
  • Page 17  Hysteresis Level 1(approx. 1-1.5mm): LED flashes briefly 1x, then LED 2 seconds off.  Hysteresis Level 2 (approx. 3-4.5mm, Standard): LED flashes briefly 2x, then LED 2 seconds off.  Hysteresis Level 3 (approx. 5-7.5mm): LED flashes briefly 3x, then LED 2 seconds off. NWS K23/0325 page 17...

  • Page 18: Settings For Nws

    The LED provides visual confirmation that the NWS is operating correctly and that the status of the wet side is correctly displayed. With its oper- ating mode switch, the NWS can be set to operate as either an N/C contact or an N/O contact.
  • Page 19 9.2.2 Selecting operating mode By reversing the polarity of the power supply, the switching function of the NWS- ...23/24 can be changed from a N/C contact to a N/O contact. For the NWS-2E the operating modus is selected by connecting the corresponding connector (plug connector or cable pin assignment) (see 8.2).
  • Page 20 The magnet supplied with the device can be used to switch off the electrical output of the NWS- independent of status of the tuning fork. In this case, the magnet must be placed on the location indicated on the device nameplate. After approximately 2 seconds, the NWS- switches the output off and the LED begins blinking.

  • Page 21: Service And Maintenance

    If the device becomes defective, it usually means that there is a fault in the device electronics that must be diagnosed and repaired. In this case, we recommend that the device be returned to the manufacturer for servicing. NWS K23/0325 page 21...

  • Page 22: Technical Information

    13. Technical Information Operating instructions, data sheet, approvals and further information via the QR code on the device or via www.kobold.com 14. Order Codes Operating instructions, data sheet, approvals and further information via the QR code on the device or via www.kobold.com 15.

  • Page 23: Eu Declaration Of Conformance (Atex)

    The above-mentioned product complies with Directive 2014/34/EU. New editions may have already replaced one or more of the standards mentioned in the EU type examination certificates. Kobold Messring declares that the product mentioned in this declaration of conformity either meets the requirements of the new editions or is not affected by the changes.

  • Page 24: Eu Declaration Of Conformance

    Additionally, the options 20 are in accordance with: 2014/35/EU Low Voltage Directive All level switches type NWS comply with the following standard: EN IEC 63000:2018 Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous substances...
  • Page 25 Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 1: General requirements, Industrial area (measurement of immunity to HF fields up to 2.7 GHz)   Hofheim, 14 Nov. 2023 H. Volz J. Burke General Manager Compliance Manager NWS K23/0325 page 25...

  • Page 26: Declaration Of Conformity

    Additionally, the electronics options 20 is in accordance with: S.I. 2016/1101 Electrical Equipment (Safety) Regulations 2016 All level switches type NWS comply with the following standard: BS EN IEC 63000:2018 Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous substances.
  • Page 27 Electrical equipment for measurement, control and laboratory use. EMC requirements. General requirements, Industrial area (Measurement of interference immunity to HF fields up to 2.7 GHz) Hofheim, 21 Feb. 2024 H. Volz J. Burke General Manager Compliance Manager NWS K23/0325 page 27...

  • Page 28: Eu-Type Examination Certificate

    20. EU-Type Examination certificate page 28 NWS K23/0325...
  • Page 29 NWS K23/0325 page 29...
  • Page 30 30 NWS K23/0325...

  • Page 31: Iecex Certificate

    21. IECEx Certificate NWS K23/0325 page 31...
  • Page 32 32 NWS K23/0325...
  • Page 33 NWS K23/0325 page 33...

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