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micronAir MICROMISER 12 Operator's Handbook Manual

Atomisers and controller
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MICROMISER 12 & 16
CONTROLLER
Operator's Handbook
Micron Sprayers Limited
Bromyard Industrial Estate
Bromyard
Herefordshire
United Kingdom
Telephone: +44 (0) 1885 482397
Fax:
+44 (0) 1885 483043
E-mail:
micron@micron.co.uk
Web site:
www.micron.co.uk
ATOMISERS
AND
Parts Catalogue
HR7 4HS
and
Iss 4W
11/2021

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Summary of Contents for micronAir MICROMISER 12

  • Page 1 MICROMISER 12 & 16 ATOMISERS CONTROLLER Operator's Handbook Parts Catalogue Micron Sprayers Limited Bromyard Industrial Estate Bromyard Herefordshire HR7 4HS United Kingdom Telephone: +44 (0) 1885 482397 Fax: +44 (0) 1885 483043 E-mail: micron@micron.co.uk Web site: www.micron.co.uk Iss 4W 11/2021...

  • Page 2: Table Of Contents

    3.4. Motor Venting................9 3.5. Electrical Connections..............10 3.5.1. Use with Micronair Controller ..........10 3.5.2. Use with External Power Supply .........10 3.5.3. Atomiser Speed Control (Micromiser 12 Only) ....13 3.5.4. Atomiser Speed Output............14 3.6. Controller ..................15 3.6.1. Mounting ................15 3.6.2. Electrical Connections............16 3.6.2.1.
  • Page 3 USE OF WARNING SYMBOLS There are two safety warning symbols used throughout this handbook: Danger related to electricity – warns of high voltage which can cause physical injury or death and/or damage to the equipment. General danger – warns about conditions, other than those related to electricity, which can result in physical injury and/or damage to the equipment.

  • Page 4: Introduction

    The atomiser is available in two versions: Micromiser 12 with rotational speed variable over the range of 1,500 – 12,000 RPM to produce spray droplets of 60 – 300 µm VMD. This atomiser can be used for spray application on surfaces, in industrial processes etc.

  • Page 5: Specification

    (excluding hose connector) Weight: 30 g Drain outlet connection: Hosetail for 6 mm I/D flexible tube Spray segment: 60˚ included angle Liquid in spray segment: 25% (remainder drained from outlet) MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 6: Controller

    Motor inhibit/enable (pull low to inhibit) Outputs: Motor status (NPN transistor, pulled low when running) Disc RPM (DC voltage) Front panel: Speed control knob LED indicators (green) for power, motor enabled and motor running MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...
  • Page 7 Fig 1. – Micromiser Atomiser Fig 2. – Micromiser 12 with Segmental Attachment MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 8: Installation

    3. INSTALLATION 3.1. Atomiser The Micronair Micromiser atomiser has a wide range of uses and the specific details of the installation will depend upon the application and the operating environment. The following sections are provided for general guidance only. It is the responsibility of the installer and/or end user to ensure that the installation of the atomiser and all associated wiring, pipework and equipment complies with all applicable standards and statutory requirements.

  • Page 9: Mounting - With Segmental Attachment

    66% of the width of the spray band as viewed on the motor end of the atomiser – see Fig. 4. The segmental attachment should be rotated to achieve the correct lateral position of the spray band. MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...
  • Page 10 Fig. 4 – Mounting of Atomiser with Segmental Attachment Fig. 5 – Connections to Atomiser MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 11: Liquid Feed

    Alternatively, a positive displacement dosing pump can be used without a flow restrictor. MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 12: Liquid Drain

    2 m. In this case, the tube must run upwards throughout its length so as to avoid any loops that could trap moisture – see Fig. 6. Fig. 6 – Orientation of Atomiser Vent Tube MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 13: Electrical Connections

    See section 3.6 for further details of the installation of the controller. 3.5.2. Use with External Power Supply A Micromiser 12 atomiser can be operated from a 24 V DC power supply instead of the Micronair controller and a Micromiser 16 atomiser must always be operated from a 24 V DC supply.
  • Page 14 Micromiser 16 when operated from a 24 V supply. If a Micromiser 12 atomiser is operated from a power supply provided by the installer it is necessary to use an external variable or fixed resistor to adjust the speed of the disc.
  • Page 15 8000 9000 10000 11000 12000 ATOMISER RPM Graph 2 – Current Consumption of Micromiser 12 vs Atomiser RPM and Flow Rate FLOW (ml/MIN) Graph 3 – Current Consumption of Micromiser 16 vs Flow Rate at 24 V Input MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 16: Atomiser Speed Control (Micromiser 12 Only)

    3.5.3. Atomiser Speed Control (Micromiser 12 Only) The speed the Micromiser 12 atomiser is determined by the voltage on pin 4 of the motor connector. This pin is pulled up to the internal +5 V supply of the motor controller and an external resistor between pin 4 and ground forms a potential divider to set the control voltage.

  • Page 17: Atomiser Speed Output

    Fig. 7 – Schematic of Speed Control for Micromiser 12 3.5.4. Atomiser Speed Output A pulse output is provided to enable the rotational speed of the atomiser to be measured without the use of an external tachometer or stroboscope on the disc.

  • Page 18: Controller

    Controller Fig. 8 – Controller Mounted on DIN Rail The Micronair controller is designed specifically for use with the Micromiser 12 atomiser and should not be used for any other application. It is the responsibility of the installer to ensure that the controller is installed and connected in accordance with all applicable standards and statutory requirements.

  • Page 19: Electrical Connections

    Enable control input (see section 3.6.2.4). Regardless of the means employed to control the atomiser, the power supply to the controller must be connected via a switch or circuit breaker to isolate the unit for maintenance. MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 20: Atomiser

    The atomiser will therefore run when this terminal is open circuit. The rotation of the atomiser can be stopped by pulling the Enable input low by means of a switch, relay contact or NPN transistor connected between the EN I/P and GND terminals. MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 21: Atomiser Run Output

    RPM O/P and GND terminals could result in damage to the controller. The impedance of a load connected to the RPM O/P terminal should be 5 K ohms or more for maximum accuracy of the reading. MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 22: Control Ground

    The cap is not required for a Micromiser 12 atomiser with a segmental attachment. The atomiser disc must be running at its required speed before the liquid flow commences.

  • Page 23: Calibration

    RPM O and GND terminals. The voltmeter will read 1 V per 2,000 RPM (ie 4 V corresponds to 8,000 RPM). When liquid is fed to the atomiser the motor controller of th e Micromiser 12 maintains a constant rotational speed regardless of the load of the liquid on the atomiser disc.

  • Page 24: Spray Droplet Size

    Graph 4 – Spray Droplet Size vs Atomiser RPM for Micromiser 12 Graph 4 shows the measured VMD (Volume Median Diameter) of spray droplets from the Micromiser 12 at rotational speeds of 1,500 – 12,000 RPM when spraying plain water.
  • Page 25 When using a Micromiser 12 atomiser with a DC power supply provided by the user the atomiser speed must be set by an external control resistor or potentiometer as described in section 3.5.3.

  • Page 26: Maintenance

    If necessary, remove the liquid feed tube from the atomiser and remove any residue or blockage from the hole through the housing. Replace the feed nozzle in the housing. Replace the atomiser disc as described above MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 27: Routine Maintenance - Controller

    Aiming a jet of liquid at the underside of the feed body with the disc removed will contaminate the motor bearings and will result in premature failure of the motor. 6.2. Routine Maintenance – Controller The atomiser controller does not require any regular maintenance. MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 28: Fault Finding

    Check disc for free illuminated when controller above minimum speed rotation and remove supplied with power and obstructions as necessary enabled Check for excessive liquid flow rate and reduce to 300 ml/min max MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...
  • Page 29 Fig. 9 – Components of Micromiser Atomiser MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 30: Parts Lists

    Note that there are no user serviceable parts in the atomiser controller and individual spare parts are not available. 7.3. Cable Assembly with Moulded M12 Connector Cable, 22 AWG x 2 m: CBP3430 MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...

  • Page 31: Segmental Attachment

    Notes EX7450 Cone } Items 1 & 2 EX7452 Catcher ring } supplied together 4911 Catcher lip EX7451 Securing ring 5027 Screw, self-tapping EX7453 Outlet fitting EX7454 Nut, outlet fitting CBP3868 O-ring MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER...
  • Page 32 Notes Micronair is the registered trademark of Micron Sprayers Limited, Bromyard, United Kingdom. Every care has been taken in the design of this equipment and the preparation of this Handbook. However, Micron Sprayers Limited cannot accept responsibility for errors or the consequences thereof.

This manual is also suitable for:

Micromiser 16

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