Kobold DON-H Series Operating Instructions Manual
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Kobold DON-H Series Operating Instructions Manual

Oval wheel flowmeter high pressure
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Operating Instructions
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Oval Wheel Flowmeter
High pressure
Model:
DON-H...

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Summary of Contents for Kobold DON-H Series

  • Page 1 Operating Instructions Oval Wheel Flowmeter High pressure Model: DON-H...

  • Page 2: Table Of Contents

        Statement of Conformity ................43     State of safeness ..................48     KOBOLD Instruments Inc. Manufactured and sold by: 1801 Parkway View Drive Pittsburgh PA 15205-1422 Tel.: 412-788-2830 Fax: 412-788-4980 E-Mail: info@koboldusa.com Internet: www.koboldusa.com DON-H 01/0721...

  • Page 3: Note

    DON-H 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 &...

  • Page 4: Regulation Use

    DON-H 4. Regulation Use The oval gear meter is a precise positive displacement flowmeter incorporating a pair of oval geared rotors. These meters are capable of measuring the flow of a broad range of clean liquids. Stainless Steel flowmeters are suited to most water-based products and chemicals and aluminium meters are suitable for fuels, fuel oils, &...

  • Page 5: Mechanical Connection

    Be sure that all wetted parts are identified and confirmed suitable for use with the media being measured. If unsure, please contact a KOBOLD engineer for guidance in obtaining the proper reference materials.  Verify that the operational pressure and temperature limits are within capability of the fully specified meter.

  • Page 6: Orientation

    DON-H Orientation When installing the flowmeter, orientation must be considered. The rotor shafts must be in a horizontal plane. To verify that the rotor shafts are in a horizontal plane, electronic cover or optional digital display will be facing in a horizontal direction.
  • Page 7 DON-H Flow Conditioning and installation location Filter: It is highly recommended to INSTALL a filter immediately before (prior to) the meter. Filters are available and sold separately. Recommended Filter: DON-H05…DON-H15: < 75 µm particle size (200 mesh) DON-H20: < 150 µm particle size (100 mesh) Flow conditioning: Flow conditions are not required since the DON flowmeter does not require any straight pipe runs before or after the flowmeter.

  • Page 8: Electrical Connection

    DON-H 7. Electrical Connection Connecting Cable Proper shielded instrument cable is highly recommended. Low capacitance twisted pair 7 x 0.3 mm (0.5 mm²) for use with the DON and any remote receiving instrumentation. Typical cable would be Belden® 9363 or similar. Connect the cable shield to DC common or designated grounding terminal at the receiving instrument.
  • Page 9 DON-H Note! The electronic option H0 is available with reed switch output. DON-H 01/0721 page 9...
  • Page 10 DON-H 7.2.2 Reed Switch Pulse Output (option H0/HA) The DON reed switch output is a SPST potential free N/O 2-wire output. This is a passive output so no power is required. Note: when using the reed switch output the liquid temperature must not change at a rate greater than 10 ºC per minute (50 ºF per minute).

  • Page 11: Internal Wiring With Electronic Options -Zx

    DON-H Internal wiring with electronic options –Zx The -Zx electronic options are pre-configured ex works in connection with the sensor boards. Reconfiguration is available on request. 7.3.1 For Z1/Z2/Z3/Z5 electronic options (reed switch and Hall sensor) a) Wiring diagram with reed switch (ex works standard, mandatory for supply with battery or in 2-wire 4-20 mA operation) DON-H 01/0721 page 11...
  • Page 12 DON-H b) Wiring diagram with Hall sensor (recommended in connection with external supply) 7.3.2 For 1A…5A electronics options See supplement to operating instructions ZOK-Ex for electronics options 1A… 5A 7.3.3 Calibration Factor (scale or K Factor) The DON flowmeter is delivered with a factory calibration certificate. Within this certificate, a calibration factor is provided.

  • Page 13: External Wiring With Electronic Unit Zok-Zx

    DON-H 7.4 External wiring with electronic unit ZOK-Zx 7.4.1 Wiring with ZOK-ZxK a) Circuit with Hall sensor (not for battery operation) b) Circuit with Reed switch DON-H 01/0721 page 13...
  • Page 14 DON-H 7.4.2 Wiring with ZOK-ZxP a) Circuit with Hall sensor b) Circuit with Reed switch DON-H 01/0721 page 14...

  • Page 15: Commissioning

    DON-H 8. Commissioning The piping MUST be flushed of debris before installation. Debris such as slag from welding, grinding dust, rust, pipe tape or sealing compound are common within new piping installations and will damage the flowmeter if not flushed or filtered from the process piping before installation and operation.

  • Page 16: Maintenance

    DON-H 9. Maintenance Flowmeter maintenance precautions:  Remove/disconnect power to the flowmeter.  Ensure that flow supply to the meter is turned off and the system is not under pressure.  Completely drain the flowmeter  Confirm that any signal output(s) will not affect the system when de- energized or removed from the circuit.

  • Page 17: Disassembly Of Don-H With Pulse Meter

    DON-H Disassembly of DON-H with Pulse meter Concerning option H0/HA 9.1.1 Pulse output board removal (refer exploded view diagram To remove the pulse output board, remove the 4 electronic cover screws (10), and remove the electronic cover (9). The pulse output board (6) can now be accessed and removed via the removal of the electronic board screws (7).
  • Page 18 DON-H 9.1.3 Removal of oval gears for DON-H15...H20 (refer exploded view) For access to the oval gears, remove the 8 or 10 upper meter body screws (5). With care, remove the upper meter body assembly (4) being careful not to damage or misplace the O-ring (3).

  • Page 19: Demounting Of The Electronics Mounted On A Don With Zx And 1A

    To remove the electronics, the screws used to connect the electronics housing to the oval gearbox housing should be loosened. Spare Parts Please consult your closest KOBOLD-Office Internet: www.koboldusa.com Inspection (refer Exploded View) Inspection points will be the following: O-rings –...
  • Page 20 DON-H 9.5.1 Re-assembly of DON-H05...DON-H10 The small flowmeters DON-H05 to DON-H10 have dimples on both housing parts (1 and 4). The referencing dimples must be in alignment when reassembling. In addition, with these small flow meters, only one oval gear is equipped with magnets.
  • Page 21 DON-H 9.5.2 Re-assembly of DON-H15...DON-H20 Both oval gears are placed on the axle shafts with the magnets oriented towards the upper meter body (4). Verify that the axle shafts are not loose. Both oval gears are equipped with embedded magnets, allowing them to each be mounted on either axle.
  • Page 22 DON-H DON-H20... Optional Tightening torques of the screws used Thread Quality Material Tightening torques 6 Nm 10 Nm 12.9 Steel 20 Nm 40 Nm DON-H 01/0721 page 22...

  • Page 23: Technical Data

    DON-H 10. Technical Data Material: Body: stainl. Steel 1.4404 DON-H05...DON-H20 Oval wheels: stainl. Steel 1.4404 DON-H05...DON-H20 Bearing: carbon graphite Axes: stainl. Steel 1.4404 O-Rings: media temperature FKM: -20...+150 °C NBR: -20...+100 °C FEP-O-seal: -15…+130 °C (FEP-O-seal, FEP encased, with solid core EPDM) ®...
  • Page 24 DON-H H0/HA electronics options: Supply voltage: 8 to 30 V (Hall sensor + reed switch Supply current: max. 5 mA (without load) pulse output) Hall pulse output: active push-pull, max. 100 mA, short-circuit- proof HIGH level: Min. +Vs – 1.3 V LOW level: max.
  • Page 25 DON-H Output Pulse Resolution -H0/HA Measuring Pulse / litre Model range Reedswitch Hall sensor [L/min] DON-H05 0,5 - 36 L/h 2670 2670 DON-H06 2-36 L/h 2670 2670 DON-H10 2 - 100 L/h 1054 1054 DON-H15 15 – 550 L/h DON-H20 1-40 The values in above table are only approximate guidelines.

  • Page 26: Pressure Drop Curves

    DON-H 11. Pressure drop curves Pressure drop limit versus flowrate The curves above represent the pressure drop for standard cut oval rotors. Special cut rotors option "Y" have alternate tooth relieve which effectively reduces the pressure drop by 50%. When sizing a meter, be sure your selection falls below the 1 bar maximum allowable pressure drop line on the graph.

  • Page 27: Order Codes

    DON-H 12. Order codes Order Details (Example: DON-H10G N1 1 R0 M 0) Stainless Steel Measuring Connection O-Ring Material Electronics Cable Entry Option Range Housing ..N1.. = ⁄ " NPT 0.13...9.5 GPH DON-H05G..R1.. = G ⁄ ..H0.. = Hall Sensor (Push-Pull) / Reed Switch, Pulse Output ..1..

  • Page 28: Dimensions

    DON-H 13. Dimensions [mm] Electronic Options -Zx/1A…5A Option -M/-N (standard) Option -S/-T (with cooling fin) DON-H 01/0721 page 28...

  • Page 29: Troubleshooting

    DON-H 14. Troubleshooting Oval gear flowmeters have two clearly distinct portions: one of which is mechanical, wetted areas with the oval gears surrounded by a housing, and the other is the electrical area, which includes the pulse output board. Details of some key troubleshooting steps will now be provided. Please also refer to the instructions on troubleshooting errors contained on the following page.
  • Page 30 DON-H Problem Possible cause Solution 1. Ground shielding of the signal cable 1. Disruption of the output signal 2. Re-lay the cable away from sources of high current 1. Eliminate the source of the air or gas pocket 2. Air or gas pockets 2.

  • Page 31: Use In Ex Areas

    15.1 General information The flow meter is intended for commercial systems and may only be used in accordance with the information in the technical documentation from Kobold and the information on the nameplate. It is operated exclusively together with certified products via an intrinsically safe circuit.
  • Page 32 DON-H b) If the instructions given here are not followed or if the product is handled improperly, our liability is void. In addition, the warranty on products and spare parts does not apply. c) The products are not safety elements in the sense of their intended use. d) Only original parts from the manufacturer may be used.
  • Page 33 DON-H 15.1.4 Servicing, maintenance Definition of terms according to IEC 60079-17: Maintenance and repair: A combination of all activities carried out in order to keep an object in a condition or to bring it back into a condition that meets the requirements of the relevant specification and ensures the execution of the required functions.

  • Page 34: Atex Version Exi (Electronics Options Xa)

    DON-H 15.1.5 Troubleshooting No changes may be made to products that are operated in connection with potentially explosive areas. Repairs to the product may only be carried out by specially trained and authorized specialists. 15.1.6 Disposal The packaging and used parts must be disposed of in accordance with the regulations of the country in which the product is installed.
  • Page 35 DON-H External earthing clamp 15.2.2 Electrical parameters of the electronic option HA when used in Zone 1/2 Electrical data:  • Pi ≤ 1 W @ max. 80 ° C ambient temperature Electronics Use in zone option 270 nF Hall sensor HA ≤...
  • Page 36 DON-H 15.2.3 Wiring examples for electronics option HA with Zener barriers Control Drawing for DON-***HA - Oval Gear Flowmeter with pulse output (Reedswitch, usage with zener barrier) for Group IIB zone 1 Safe Area Hazardous Area Flowmeter DON-* ** ** ** HA * * Group IIB, zone 1 -20°C ≤...
  • Page 37 DON-H Control Drawing for DON-***HA - Oval Gear Flowmeter with pulse output (Hallsensor, usage with zener barrier) for group IIB zone 1 Safe Area Hazardous Area Flowmeter DON-* ** ** ** HA * * Group IIB, zone 1 -20°C ≤ Ta ≤ +60°C simple apparatus Zener barrier 300R...
  • Page 38 DON-H 15.2.5 Commissioning, installation Depending on the IP degree of protection, the time for cleaning the equipment (dust deposits) must be specified. Other important facts: a) The product may only be put into operation in Zone 2 (Cat. 3G, EPL Gc) or in Zone 1 (Cat.
  • Page 39 DON-H s) The ignition limit curves from EN 60079-11 must be taken into account in Zone 2 without a safety factor and must be observed during installation. The safety factor 1.5 is to be used in zone 1. A control drawing (system description) to be created by the installer / operator is required for the installation of the intrinsically safe circuit.
  • Page 40 DON-H 15.2.6 Identification of the flow meter (nameplate) Basic device label DON-H (example) Device label for Ex version intrinsically safe, option HA (example) DON-H 01/0721 page 40...

  • Page 41: Eu Declaration Of Conformance

    DON-H 16. EU Declaration of Conformance We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the product: Oval Gear Flow Meter Model: DON-H... to which this declaration relates is in conformity with the directives noted below: 2014/68/EU ...
  • Page 42 DON-H Also complies with the following European and national standards and technical regulations:  Technical rules for hazardous substances (TRGS) 727: 2016, avoidance of ignition hazards due to electrostatic charges Hofheim, 30 July 2021 H. Volz M. Wenzel General Manager Proxy Holder DON-H 01/0721 page 42...

  • Page 43: Statement Of Conformity

    DON-H 17. Statement of Conformity DON-H 01/0721 page 43...
  • Page 44 DON-H DON-H 01/0721 page 44...
  • Page 45 DON-H DON-H 01/0721 page 45...
  • Page 46 DON-H DON-H 01/0721 page 46...
  • Page 47 DON-H DON-H 01/0721 page 47...

  • Page 48: State Of Safeness

    DON-H 18. State of safeness DON-H 01/0721 page 48...

This manual is also suitable for:

Don-05Don-10Don-15Don-20

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