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Summary of Contents for Kobold NBK-16
- Page 1 Operating Instructions Plastic Bypass Level Indicator Model: NBK -16...
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Page 2: Table Of Contents
13. Order Codes ....................15 14. Dimensions ....................16 15. Disposal ...................... 18 16. EU Declaration of Conformance ..............19 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-16/ -17 K05/0722... -
Page 3: Note
• Bypass Level Indicator model: NBK-16/ -17 4. Regulation Use Any use of the Bypass Level Indicator, model: NBK-16 or 17, 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. -
Page 4: Operating Principle
NBK-16/ -17 5. Operating Principle Kobold plastic level indicators are used for continuous measurement, display and monitoring of liquid levels. The bypass tube is attached to the sidewall of the vessel. According to the hydrostatic pressure principle the level in the bypass tube equals the level in the vessel. -
Page 5: Mechanical Connection
• The magnetic roller display and attached magnetic switches must be aligned with the supplied float before installation. • The bypass level indicator may not be placed in the immediate vicinity (< 1 meter) of strong electromagnetic fields. NBK-16/ -17 K05/0722 page 5... -
Page 6: Electrical Connection
2. Replace the base fitting, insert the gasket and fix with screws. Note! All cabling and electrical connections must be carried out in accordance with the regulations applicable in the country where the equipment is installed and by qualified personnel. page 6 NBK-16/ -17 K05/0722... -
Page 7: Magnetic Switches
RC Network (AC loads) or a suppression diode. With a capacitive load, connecting cables longer than 50m or connection to a PLC with capacitive input circuit, a 22. resistor is required to be connected in series to limit current spikes. NBK-16/ -17 K05/0722 page 7... -
Page 8: Level Transmitter (Type
The cable gland must then be sealed and the lid of the terminal box be closed tightly. 7.4 Two-wire Head transducer (Type ...M) The principal connection of Two-wire 4-20 mA transmitter is shown in the wiring diagram below. The wiring diagram of the actual used transmitter should always be observed. page 8 NBK-16/ -17 K05/0722... -
Page 9: Configuration / Adjustments
8.3 Setting Limit Values (Model – RPVC) See the operating instructions of the limit value transmitters used for setting limit values. 8.4 Two-wire Head Transducer (Type ...M) Level sensors and transmitters are matched at the factory. No adjustment is necessary. NBK-16/ -17 K05/0722 page 9... -
Page 10: Commissioning
Warning! During functional testing, certain actions in the control circuit may be triggered unintentionally resulting in possible harm to persons or goods. Control circuits have to be switched off or components have to be disconnected for testing. page 10 NBK-16/ -17 K05/0722... -
Page 11: Assembly
Gaskets, screws, washers and nuts suitable for the process connection must be used for assembly. Choose a gasket with a suitable corrosion resistance. Isolation valves should be mounted between the vessel and the bypass tube if possible. NBK-16/ -17 K05/0722 page 11... -
Page 12: Maintenance
Please use protective wear (gloves, safety mask, gas mask and breathing equipment). The float can be removed after dismantling the bottom fitting. The float should be reinstalled as described in the Assembly Section after being checked visually. page 12 NBK-16/ -17 K05/0722... -
Page 13: Technical Information
Reed contact chain Sensor tube: stainless steel 1.4571 Total resistance: 3.2...50 kΩ (depending on length) Measuring-circuit voltage: max. 24 V Measuring current: max. 0,1 A Resolution: 10 mm Protection: IP 65 Cable entry: M20 x 1.5 NBK-16/ -17 K05/0722 page 13... - Page 14 1000 Ω at U Max. load: = 30 V 700 Ω at U = 24 V 50 Ω at U =12 V Ambient temperature: -20... +60 °C Resolution: 10 mm Protection: IP 65 Cable entry: M20 x 1.5 page 14 NBK-16/ -17 K05/0722...
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Page 15: Order Codes
Tared/balanced float according to media density is optional available at extra charge. Float tare must be specified. Standard is without tare. Any deviation between media density and floats nominal causes an additional error in measurement. Without float tare the minimum float density is stated on the instrument label. NBK-16/ -17 K05/0722 page 15... -
Page 16: Dimensions
NBK-16/ -17 14. Dimensions Bypass Float Diameter D Length L Model Material [mm] [mm] PVDF PVDF PVDF PVDF PVDF page 16 NBK-16/ -17 K05/0722... - Page 17 Clearance dimension A [mm] Model Material Medium density 590 kg/m 660 kg/m 750 kg/m 910 kg/m 1200 kg/m NBK-16 Model Material Medium density 790 kg/m 850 kg/m 930 kg/m 1070 kg/m 1340 kg/m NBK-17 PVDF NBK-RPVC NBK-16/ -17 K05/0722 page 17...
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Page 18: Disposal
(Cd, Hg, Li or Pb) of the heavy metal that is decisive for the classification as containing pollutants: 1. „Cd" stands for cadmium 2. „Hg" stands for mercury 3. „Pb" stands for lead 4. „Li" stands for lithium Electrical and electronic equipment page 18 NBK-16/ -17 K05/0722... -
Page 19: Eu Declaration Of Conformance
NBK-16/ -17 16. EU Declaration of Conformance We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the product: Bypass Level Indicator model: NBK -16/ -17 to which this declaration relates is in conformity with the standards noted below:...
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