Kobold MAS Operating Instructions Manual
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Kobold MAS Operating Instructions Manual

Electronic mass flow meter
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Operating Instructions
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Electronic Mass Flow Meter
Model: MAS

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  • Page 1 Operating Instructions Electronic Mass Flow Meter Model: MAS...

  • Page 2: Table Of Contents

    14. Order Codes ....................19 15. Dimensions ....................20 16. Disposal ...................... 21 17. Supplement ....................21 18. EU Declaration of Conformance ..............25 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 3: Note

    Please read these operating instructions before unpacking and putting the unit into operation. Follow the instructions precisely as described herein. The instruction manuals on our website www.kobold.com are always for currently manufactured version of our products. Due to technical changes, the instruction manuals available online may not always correspond to the product version you have purchased.

  • Page 4: Regulation Use

    4. Regulation Use Any use of the Electronic Mass Flow Meter, model: MAS, which exceeds the manufacturer’s specifications, may invalidate its warranty. Therefore, any resulting damage is not the responsibility of the manufacturer. The user assumes all risk for such usage.

  • Page 5: Operating Principle

    6. Operating Principle 6.1 Measuring principle The operation of the Mass Flow Meter, model: MAS, is based on the principle of heat transport (first law of thermodynamic). The medium flows through the bypass measuring system. Gas enters the MAS flow body and divides into two flow paths. Part of the flow goes through the laminar flow bypass the other part flows through the above located measuring pipe.

  • Page 6: Mechanical Installation

    In order to ensure a successful installation, inlet and outlet tubing or piping should be in a clean state prior to plumbing your MAS to the system. MAS is applicable to clean gas only because particles and other foreign matter may pollute the sensor tube and laminar flow element and cause wrong measurement results.

  • Page 7: Electrical Connection

    8. Electrical Connection The standard MAS is provided with a 9-pin “D” sub type connector located on the side of the MAS. Attention! Ensure that the voltage of your installation corresponds with the voltage of the measuring device. Attention! A wrong terminal assignment may lead to a damage of the electronic.

  • Page 8: Power Supply

    DC power jack. Both supplies may be damaged. 8.1 Power supply If you use a KOBOLD MAS-5000 or MAS-5015 power pack, insert the jack plug in the foreseen socket on the Mass Flow Meter MAS. Then simply connect the power unit to the mains.

  • Page 9: Output Signals

    8.3 Display KOBOLD Mass Flow Meters, model MAS, for gases are available with an integrated digital display, a remote digital display and without a digital display. The decimal point on the version with digital display is set at the factory. It is always a 3 ½-digit display.

  • Page 10: Operation

    9. Operation Pressure- and temperature conditions The gas flow rate output of your MAS always refers to “standard” conditions of 21 °C (70 °F) and 760 mm of mercury (1 atmosphere), unless you have specified otherwise. Make sure that your MAS is always calibrated on the operating conditions.
  • Page 11 Optional 4-20 mA output signal As an option for all MAS Mass Flow Meters, a 4-20 mA analogue output is available. The output signal is provided at 9-Pin Sub-D-Connector. (Attention! Maximum load 50 to 500 Ohms) Single unit Multiple Installation...

  • Page 12: Totalizer

    10. Totalizer The totalizer is designed to provide a totalizer function for the MAS-11/MAS-31. It will display the totals as well as the flow. Display: The totalizer display has three screens which are accessed by pressing the button as indicated below:...

  • Page 13: Maintenance

    It is recommended that your MAS be returned to Kobold Messring if cleaning, repair, or recalibration are necessary. This is usually your most cost-effective and reliable alternative.

  • Page 14: Technical Information

    5 % either glass-fibre-reinforced nylon or stainless steel material no. 1.4401 Seals: FPM (option: Kalrez, Neopren) Supply voltage: 12-15 VDC linear 0 - 5 VDC (load min. 2000 Ω) Output: option: 4 - 20 mA (load max. 500 Ω) page 14 MAS K05/0722...

  • Page 15: Conversion To Other Working Conditions

    T = Absolute temperature (°K or °R) °K = °C + 273; °R = °F + 460) Example 1 changing „standard“ conditions If your MAS has a flow rate reading of 10.00 SLM and was calibrated at standard conditions of 70 °F (21 °C) and 1 atmosphere (14.7 psia), and if you wish to convert this reading to standard conditions of 32 °F (0 °C) and 1 atmosphere,...
  • Page 16 The temperature difference between the upstream and downstream coils A correction factor for the molecular structure of the gas given by the following table: Number of Atoms in the Gas Molecule ______________________________________________________________ Monatomic 1.040 Diatomic 1.000 Triatomic 0.941 Polyatomic 0.880 page 16 MAS K05/0722...
  • Page 17 K1/K2 directly using Equation (6). In some instances, K1/K2 from the tables may be different from that which you calculate directly. The value from the tables is preferred because in many cases it was obtained by experiment. MAS K05/0722 page 17...
  • Page 18 2-4% of the calculated flow rate. Example: A MAS is calibrated for nitrogen (N2), and the flow rate is 1000 SCCM for a 5 VDC output signal. The flow rate for carbon dioxide at a 5 VDC output is:...

  • Page 19: Order Codes

    MAS-1112 MAS-2012 0-40 Nml/min 88 mbar MAS-1013 MAS-1113 MAS-2013 on customer specification MAS-10XX MAS-11XX MAS-20XX Order details stainless steel version (example: MAS-3001 C1 V2 0) Mesuring range Max. Case size Model Connection Voltage Output for N pressure lost supply with...

  • Page 20: Dimensions

    15. Dimensions page 20 MAS K05/0722...

  • Page 21: Disposal

    1. „Cd" stands for cadmium 2. „Hg" stands for mercury 3. „Pb" stands for lead 4. „Li" stands for lithium Electrical and electronic equipment 17. Supplement Gas tables and K-factors (see tables on the following pages) MAS K05/0722 page 21...
  • Page 22 22 MAS K05/0722...
  • Page 23 MAS K05/0722 page 23...
  • Page 24 24 MAS K05/0722...

  • Page 25: Eu Declaration Of Conformance

    18. EU Declaration of Conformance We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the product: Electronic Mass Flow Meter model: MAS to which this declaration relates is in conformity with the standards noted below: EN 61326-1:2013...

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