Kobold NUS-4x04 Instruction Manual
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Kobold NUS-4x04 Instruction Manual

Ultrasonic level meter nus-4 series
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Ultrasonic Level Meter
Model: NUS-4...

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Summary of Contents for Kobold NUS-4x04

  • Page 1 Instruction Manual Ultrasonic Level Meter Model: NUS-4...

  • Page 2: Table Of Contents

    NUS-4 1. Contents Contents ......................2     Note ......................4     Instrument Inspection ..................4     Regulation Use ....................4     Operating Principle ..................5     Mechanical connection .................. 5     Block distance ..................5  ...
  • Page 3 NUS-4 Manufactured and marketed by: Kobold Messring GmbH Nordring 22-24 D-65719 Hofheim Tel.: 06192-2990 Fax: 06192-23398 Internet: http: //www.kobold.com e-mail: info.de@kobold.com NUS-4 K05/0216 Seite 3...

  • Page 4: Note

    NUS-4 2. Note Please read these operating instructions before unpacking and putting the unit into operation. Follow the instructions precisely as described herein. The devices are only to be used, maintained and serviced by persons familiar with these operating instructions and in accordance with local regulations applying to Health & Safety and prevention of accidents.

  • Page 5: Operating Principle

     Mount the sensor high enough that even with maximum filling of the container, the block distance is not violated. Violation of the block distance may lead to device-malfunction. Model Block distance 0,20 m NUS-4x04 0,25 m NUS-4x06 0,35 m NUS-4x08 0,35 m...

  • Page 6: Installation (Liquid Level Measurement)

    NUS-4 6.2 Installation (Liquid Level Measurement)  Never mount two ultrasonic level-measuring devices in one container, because the two devices can interfere with each other's functioning. POSITION The optimal position of the NUS-4 is on the radius r = (0.3 … 0.5) R of the (cylindrical) tank / silo.

  • Page 7: Installation (Open Channel Flow Measurement)

    NUS-4 STAND-OFF PIPE The structure of the stand off pipe should be rigid; the inner rim where the ultrasonic beam leaves the pipe should be rounded. D min D min NUS- NUS- NUS- NUS- NUS- NUS- 4x04 4x06 4x08 4x10 4x15 4x25* Ø...

  • Page 8: Mechanical Connection

    NUS-4 6.4 Mechanical connection  Screw the unit in to its place. Use open wrench for tightening; max torque is 20Nm  After tightening the enclosure can be rotated to the proper position. (Safety bolt prevents rotation more than 350°) 7.

  • Page 9: Programming

    NUS-4 8. Programming 8.1 BASIC CONCEPTS AND ELEMENTS OF THE ULTRASONIC MEASUREMENT Close end blocking (programmed value DIST= distance (measured) Programmed measurement range of the application LEV= level calculated; H - DIST) VOL= volume (calculated from DIST  LEV) Far end blocking 8.2 Programming without Display Module Programming is only possible if the Transmitter is in Level Measuring Mode and receives valid echo i.e.
  • Page 10 NUS-4 Procedure of programming: press button in the relevant sequence and check the state of the LED-s. Symbols for the states of the LED-s: = LED is off, = LED is blinking, = LED is on, = LEDs are blinking alternatively = Dont care Minimum level, (0%, empty tank) assignment to 4 mA...

  • Page 11: Programming With The Display Module Nus-400P

    NUS-4 Damping time setting (Check for a valid echo as above) Action Led state following the action Press ENTER button NUS-4 in programming mode steadily – 10 sec Press any of the NEXT = – 30 sec , UP , DOWN –...

  • Page 12: Display Module Nus-400P

    NUS-4 The NUS-4 will be delivered with the following Factory Default:  Current output, display and bargraph: LEVEL  Current output and bargraph proportional to the level  4 mA: assigned to the minimum level 0 %  20 mA: assigned to the maximum level 100 % ...

  • Page 13: Programming Steps With The Display Module Nus-400P

    NUS-4 8.3.2 Programming steps with the Display Module NUS-400P Programming will be performed by the pressing and releasing the relevant one or two keys (simultaneously). Single key pressing ENTER to select parameter address and go to parameter value to save parameter value and return to parameter address NEXT to move the blinking (sign of change) of the digit to the left parameter address (P01,...

  • Page 14: Get Level Function

    NUS-4 8.3.3 GET LEVEL Function Special function used only in level and distance measurement modes + DOWN Notes: If after pressing ENTER blinking does not spring over from the parameter address to the parameter value this means that  the parameter is either a read-out type, or ...

  • Page 15: Quickset

    NUS-4 8.3.5 QUICKSET Recommended as a simple and fast way to start up NUS-4. QUICKSET programming (aided by 6 screens) is used in uncomplicated level metering applications to set the 6 basic parameters. The other parameters can only be modified in the Full Parameter Access Mode see 9.1 (P01).
  • Page 16 NUS-4 Screens Actions APplication xx= select “EU” (European) for metric or “US” for US engineering units (Use / DOWN keys) yy= indicating “Li” for liquids AP:xxyy DEFAULT: EU Programming of this parameter will result in loading the factory default with the corresponding engineering units. H = xxxx maximum measuring distance –...

  • Page 17: Full Parameter Access

    NUS-4 8.3.6 Full Parameter Access Full Parameter Access is the highest programming level to access all features: Example:  Setting the measurement  Programming of the output  Optimization of measurement  Selection of 11 pre-programmed tank shapes for volume measurement ...

  • Page 18: Parameters - Description And Programming

    NUS-4 9. Parameters – Description and Programming 9.1 Measurement Configuration P00: - cba Application/Engineering Units Programming of this parameter will result in loading the factory default with the corresponding engineering units. Operating (measurement) mode Liquid level measurement Engineering units (according to “c”) Attention: mind the sequence! When programming this parameter the Metric...
  • Page 19 NUS-4 P02: - cba Calculation units Temperature Attention: mind the sequence! °C When programming this parameter the right °F value “a” will be blinking first. This table is interpreted according to P00(c), P01(a) and P02(c) and is irrelevant in case of percentage measurement ( P01(a)= 2 or 4 ) Volume Weight (set also P32)
  • Page 20 “GET LEVEL” function (by double key pressing of UP + DOWN ) provided the bottom is flat. Enter the actual measured value displayed as P04. Model Factory default of maximum measuring distance (m/ft) NUS-4x04 4/13 NUS-4x06 6/20 NUS-4x08 8/26...

  • Page 21: Current Output

    NUS-4 P06: Far end blocking Far end blocking is used to neglect incorrect level/volume readings and output actions below a pre-set level programmed in P06. A). Level measurement The far-end blocking can be used to avoid disturbing effect of stirrer or "SUB 0"...

  • Page 22: Relay Output

    NUS-4 P12: - - - a Error indication by the current output In case of error the NUS-4 will provide one of the current outputs below. (For errors and their interpretation see Chapter 10). NAMUR) RROR INDICATION ACCORDING TO Hold last value 3.8 mA 22 mA FACTORY DEFAULT: 0...

  • Page 23: Measurement Optimisation

    NUS-4 9.4 Measurement Optimisation P20: - - - a Damping This parameter can be used to reduce unwanted fluctuation of the display and output. Damping LIQUIDS time None/moderate Heavy/dense (second fume or waves fume or turbulent waves no filter applicable not recommended recommended applicable...
  • Page 24 NUS-4 P25: - - - a Selection of Echo within the measuring window A so-called measuring window is formed around the echo signal. The position of this measuring window determines the flight time for calculation of the distance to the target. (the picture below can be seen on the test oscilloscope) Received Echo 2.
  • Page 25 NUS-4 P28: - - - a Echo loss indication Echo loss Remark indication During echo-loss, display and analogue output will hold last value. If the echo-loss prevails for 10 sec plus the time period set in P20 (damping time), the reading on the display will change to "no Echo" and the outputs will change according to the "Error Indication Mode"...

  • Page 26: Volume Measurement

    NUS-4 P31: Sound velocity at 20C (m/sec or ft/sec depending on P00(c) ) Use this parameter if the sound velocity in the gases above the measured surface differs largely from that of in air. Recommended for applications where the gas is more or less homogeneous. If it is not, the accuracy of the measurement can be improved using 32-point linearisation (P48, P49).

  • Page 27: Volume Flow Measuring

    NUS-4 9.6 Volume Flow Measuring P40: - - ba Devices, formula, data Devices, formula, data Also to be set Under preparation Under preparation Under preparation Under preparation Under preparation Under preparation Under preparation Under preparation Under preparation General PARSHALL flume P46, P42 PALMER-BOWLUS (D/2) P46, P41...
  • Page 28 NUS-4 P41-45: Flume/weir dimensions FACTORY DEFAULT: 0 P40= 00 KOBOLD Parshall Channels (in preparation) P40= 09 General Parshall flume 0.305 < P42(width) <2.44         Sensor 2.5 < P42 /s]= K*P42*h P42[m] 3.05 2.450 Sensor 4.57...
  • Page 29 NUS-4 15cm P40= 13 Khafagi Venturi flume /s]= P42*1.744*h + 0.091*h Sensor Sensor P40= 14 P40=14 Bottom step weir 0.0005 < Q[m /s] < 1 0.3 < P42[m] < 15 0.1 < h[m] < 10 /s]= 5.073*P42*h Accuracy: 10% P40= 15 Suppressed rectangular or BAZIN weir P40=15 0.001 <...
  • Page 30 NUS-4 P40= 19 P40=19 THOMSON (90°-notch) weir 0.0002 < Q[m3/s] < 1 0.05 < h[m] < 1 Q[m3/s]= 1.320*h2.47 Accuracy: 3% P40= 20 P40=20 Circular weir 0.0003 < Q[m /s] < 25 0.02 < h[m] < 2 /s]= m*b*D m= 0.555+0.418h/P41+(P41/(0.11*h)) Accuracy: 5% P46...

  • Page 31: 32- Point Linearisation

    NUS-4 9.7 32- Point Linearisation P47: - - - a Linearisation Linearisation is the method of assigning requested (calibrated or calculated) level, volume or flow to values measured by the transmitter. It can be used for instance if the sound velocity is not known (LEVELLEVEL) or in the case of tank with other shape than under 6.4 or open channel other than under 6.5 (LEVEL ...

  • Page 32: Informational Parameters (Read Out Parameters)

    NUS-4 9.8 Informational Parameters (Read Out Parameters) P60: Overall operating hours of the unit (h) Indication varies according to the elapsed time: Operating hours Indication form 0 to 999.9h xxx,x 1000 to 9999h xxxx Over 9999h X,xx: e meaning x,xx 10 P61: Time elapsed after last switch-on (h) P62:...

  • Page 33: Additional Parameters Of Flow Metering In Open Channels

    NUS-4 9.9 Additional Parameters of Flow Metering in Open Channels P76: Head of flow (LEV) The Headwater value can be checked here. This is the “h” value in the formula for flow calculation. P77: TOT1 volume flow totaliser (resetable) P78: TOT2 volume flow totaliser (non-resetable) Resetting TOT1 totaliser: 1).

  • Page 34: Access Lock

    NUS-4 P85: Cycle time for simulation (sec) P86: Simulated low level value (m) P87: Simulated high level value (m) 9.12 Access Lock P99: dcba Access Lock by Secret Code The purpose of this feature is to provide protection against accidental (or intentional) re-programming of parameters.

  • Page 35: Parameter Table

    NUS-4 11. Parameter Table Par. Page Description Value Par. Page Description Value d c b a d c b a Application/Engineering Units Echo loss indication Measurement Mode Blocking out of disturbing object Calculation units N.A. Rounding Sound velocity in different gases Maximum Measuring Distance Specific gravity Minimum Measuring Distance...

  • Page 36: Sound Velocities In Different Gases

    NUS-4 Par. Page Description Value Par. Page Description Value window Distance of the in the measuring N.A. window Signal / noise ratio N.A. Blocking Distance Software code Waterhead of the flow N.A. TOT1 volume flow totaliser Access lock 12. Sound Velocities in Different Gases The following table contains the sound velocity of various gases measured at.

  • Page 37: Technical Data

    Process temperature: -30...+90 °C Ambient temperature: -30..+70 °C -25..+70 °C (with programming unit) Operating pressure: 0.5..3 bar abs. (for use <1 bar abs contact Kobold) Housing: Aluminium, powder coated Sensor and connection: Polypropylene, PVDF Process connection: NUS-4x04:...

  • Page 38: Order Codes

    NUS-4 Conical beam diameter (r) NUS- NUS- NUS- NUS- NUS- NUS- 4x04 4x06 4x08 4x10 4x15 4x25 0.15 m 0.14 m 0.18 m 0.16 m 0.21 m 0.27 m 0.25 m 0.23 m 0.30 m 0.25 m 0.30 m 0.39 m 0.46 m 0.40 m 0.54 m...

  • Page 39: Dimensions

    NUS-4 15. Dimensions NUS-4x04 NUS-4x06 2 x M20x1,5 2 x M20x1,5 2 x 1/2" NPT 2 x 1/2" NPT 2" BSP 1 1/2" BSP oder NPT oder NPT BSP Länge 15 NPT Länge 22 BSP Länge 15 NPT Länge 22...

  • Page 40: Eu Declaration Of Conformance

    NUS-4 16. EU Declaration of Conformance We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the product: Ultrasonic Level Meter Model: NUS-... to which this declaration relates is in conformity with the standards noted below: Safety requirements...

This manual is also suitable for:

Nus-4x06Nus-4x08Nus-4x15Nus-4x25Nus-4x10

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