Macnaught MX Series Instruction Manual
Oval gear flowmeter for hazardous areas
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MXEX-INST
Rev 14
12/2020
OVAL GEAR FLOWMETER
FOR HAZARDOUS AREAS
EXPLOSION/ FLAME PROOF
To the Owner
Please read and retain this instruction manual to assist
you in the operation and maintenance of this product.
The manual contains operating and maintenance
instructions for the MX-Series Flow Meters with Ex
outputs. This covers port sizes from 1/4" to 4".
Refer to separate instruction manual for information on
operating modes and features of LCD displays.
Contact local representative or distributor for further
assistance.
This Flow Meter has incorporated the oval gear
principle into its design. Exceptional repeatability and
high accuracy over a wide range of fluid viscosities
and flow rates are features of the oval gear design.
MX SERIES
INSTRUCTION MANUAL
INTRINSICALLY SAFE
With a low pressure drop and high pressure ratings,
oval gear flow meters are suitable for gravity and
(in-line) pump applications.
Macnaught offer a comprehensive set of web based
support materials to complement this instruction
manual.
Access the Instruction manual by scanning below
QR code.
www.macnaught.com.au
Page 1 of 28
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Summary of Contents for Macnaught MX Series
- Page 1 (in-line) pump applications. The manual contains operating and maintenance instructions for the MX-Series Flow Meters with Ex Macnaught offer a comprehensive set of web based outputs. This covers port sizes from 1/4” to 4”. support materials to complement this instruction manual.
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Page 2: Table Of Contents
Index Page 3 Important Information …………………………………………………………. Installation Page 4 Operating Principle …………………………………………………………. Page 4-5 Installation Instructions …………………………………………………………. Page 5 Earthing Points on Flow meter …………………………………………………………. Maintenance Procedure Page 6 Disassembly …………………………………………………………. Page 6 Reassembly …………………………………………………………. Page 7 Pictorial Representation …………………………………………………………. Flow meter Specifications Page 8 Flow meter Specifications... -
Page 3: Important Information
(READ CAREFULLY) EQUIPMENT CATEGORY: The Macnaught oval gear flow meters are designed in category II 2 G according to EN 60079-0 and EN 60079-11 for use in zone 1 (GASES). The inside of the measuring unit is also approved for zone 1. -
Page 4: Operating Principle
OPERATING PRINCIPLE Fluid passing through the meter causes the rotors to turn, as shown below. One of the rotors (the active rotor) is fitted with magnets. The passing of the magnets are picked up by the electronic sensor. The excitation of this switch provides a ‘Raw Pulse Output’... -
Page 5: Earthing Points On Flow Meter
INSTALLATION INSTRUCTIONS 1. It is recommended that a bypass line be included in the design. This provides the facility for a meter The flow meter can accept flow in any direction. removed maintenance without interrupting production. (see figure) 5. The meter can be installed in any orientation as long as the meter shafts are in a horizontal plane as per the picture. -
Page 6: Maintenance Procedure
1. Before reassembling, check the condition of flow meter parts (rotors, body, cap, seal O-ring and shafts). Re place if necessary. Contact Macnaught to check for spare parts availability. 2. One of the rotors is active (have magnets) and other one is neutral. The active rotor can be identified by running a metal object over the face of the rotor. -
Page 7: Pictorial Representation
PICTORIAL REPRESENTATION OF FLOWMETER AND DISASSEMBLED PARTS Flow meter FIG 1 Flow Meter Cap FIG 2 Shafts Dimple Flow meter Body FIG 3 Groove Dimple Rotors Chamfer Area Rotors (At 90°) FIG 6 FIG 4 Active Rotor Neutral Rotor For MX06 and MX09 meters, the flat side of rotors with chamfer edges... -
Page 8: Flow Meter Specifications
FLOWMETER SPECIFICATIONS Flow Range Flow Range Flow Meter < > (Viscosity 5 cP) (Viscosity 5 cP) Series Metric Metric MX06 2 to 100 LPH 0.5 to 26 GPH 0.5 to 100 LPH 0.13 to 26.4 GPH MX09 25 to 500 LPH 6.6 to 132 GPH 15 to 500 LPH 4 to 132 GPH... -
Page 9: Pulser Specifications & Wirings
Output type „B‟ Intrinsically Safe (Ex ia) SPECIFICATIONS & WIRING This sensor must be installed with an approved safety barrier. SENSOR TYPE Omni Polar Supply Tracking , NPN with 3.1kΩ pull-up resistor ATEX & IECEx: II 1 G Ex ia IIC T6...T4 Ga, T6@ -40°c ≤T ≤+65°c US &... - Page 10 Intrinsically Safe (Ex ia) SPECIFICATIONS & WIRING Sensor Cable Connector End of Mating Cable Available Cable lengths are 2-meters, 5-meters, 10-meters, 15-meters and 50-meters. By Default meter fitted with 2-meter cable. Contact Macnaught, if longer cable is required. Page 10 of 28...
- Page 11 Output type „N‟ Intrinsically Safe (Ex ia) SPECIFICATIONS & WIRING This sensor must be installed with an approved safety barrier SENSOR TYPE Magnet-inductive Proximity Sensor NAMUR ATEX & IECEx: II 1 G Ex ia IIC T4...T6 Ga Markings Class 1, Division 1 GROUP ABCD T4 resp.
- Page 12 Output type „N‟ Intrinsically Safe (Ex ia) SPECIFICATIONS & WIRING Sensor Cable Connector Available Cable lengths are 2-meters, 5-meters, 10-meters, 15-meters and 50-meters. By Default meter fitted with 2-meter cable. Contact Macnaught, if longer cable is required. Page 12 of 28...
- Page 13 Output type „C‟ Flame Proof (Ex d) SPECIFICATIONS & WIRING SENSOR TYPE Omni Polar Supply Tracking , NPN with 3.1kΩ pull-up resistor ATEX & IECEx: II 2 G Ex db IIC T6...T3 Gb, T3@ Ta = -55°C… +140°C USA & CAN: Markings Class 1 Division 1 GROUP ABCD T6...T3...
- Page 14 Output type „C‟ Flame Proof (Ex d) SPECIFICATIONS & WIRING Sensor and Cable Assembly Available Cable length is 3-meters Flow Meter Process Connection Conduit Thread G Thread M20x1.5-6H ANSI(AUS) / DIN / JIS NPT Thread 1/2-14 NPT ANSI (US) The green wire MUST be connected to an Earth ground. Page 14 of 28...
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Page 15: Engraving / Data Plate Information
Flow meter Specs / Data Plate MX75-MX100: Serial number, Model number, MX06-MX50: Serial number, Model number, k-factor, k-factor, flow rate range and temperature details are flow rate range and temperature details are engraved on flow meter data plate. See below FIG engraved on meter body. -
Page 16: Exploded Diagrams
EXPLODED DIAGRAM (Models MX06-MX50) METER COMPONENTS ITEM NO SENSOR SENSOR HOLDER CIRCLIP METER BODY METER CAP O-RING ROTORS MAGNET HOUSING MAGNETS ROTOR SHAFTS LOCATING PIN METER CAP METER CAP SCREWS EXPLODED DIAGRAM (Models MX75-MX100) METER COMPONENTS ITEM NO METER COMPONENTS ITEM NO METER BODY CIRCLIP... -
Page 17: Troubleshooting Guide
Check wiring connections MAINTAINENCE VIDEOS Macnaught provides an comprehensive set of ‘Maintenance Videos’ to assist the end user in all aspects of service and / or repair of the flow meter range. This web based resource can be accessed by scanning the QR. -
Page 18: Wetted Parts
WETTED PARTS Wetted Parts MX06P MX09P - MX12P MX19P - MX50P MX75P - MX100P METER BODY SS 316 SS 316 SS 316 METER CAP SS 316 SS 316 SS 316 ROTORS SS 316 SS 316 SS 316/PEEK HIGH VISCOSITY ROTORS SS 316 SS 316 ROTOR SHAFTS... -
Page 19: Spare Parts Kits
Ex ia, NAMUR PULSER KIT Sensor kit MXD-CS Ex d Conduit: M20 x 1.5 Sensor Socket kit MXS-SOCKETM12 Sensor kit MXD-C2S Ex d Conduit: ½” NPT Sensor Socket kit MXS-SOCKETM12 To check for more service kits, Contact Macnaught. Page 19 of 28... -
Page 20: Pressure Drop Graphs
PRESSURE DROP v VISCOSITY 100% Page 20 of 28... -
Page 21: Dimensional Diagrams
16 flanges are raised faced (RF) while JIS 10k MX40 240* flanges are flat faced (FF) by default. Contact MX50 264* Macnaught if a different configuration is required. DIMENSIONS Flow Meters MX75 DIMENSIONS Flow Meters MX100 Page 21 of 28... - Page 22 DIMENSIONS MX06 - MX50 meters with sensors Sensor “B” Sensor “N” Sensor “C” Flow meter (mm) (mm) (mm) MX06 MX09 MX12 MX19 MX25 MX40 MX50 MX75 MX100 Page 22 of 28...
- Page 23 WALL MOUNT ADAPTOR (MX06 - MX25) Meters (Ø mm) (Ø mm) (mm) (mm) (mm) (mm) (mm) (Ø mm) (mm) (mm) (Ø mm) MX06 - MX09 M5x0.8 MX12 M5x0.8 MX19 M6x1.0 MX25 M6x1.0 Wall Mount Holes (4) SS Countersunk screws to be supplied with the wall mount bracket 5 mm in diameter and 16 mm in length for MX06 - MX12 meters 6 mm in diameter and 20 mm in length for MX19 - MX25 meters Earthing Point...
- Page 24 WALL MOUNT THREAD POSITION ON FLOWMETER‟S CAP (MX06 - MX50) Meters MX06 M5 x 0.80 MX09 M5 x 0.80 MX12 M5 x 0.80 MX19 M6 x 1.00 MX25 M6 x 1.00 MX40 M8 x 1.25 MX50 M8 x 1.25 Mounting Holes x 4 Earthing Points x 4 (Any of them can be used) Page 24 of 28...
- Page 25 EU Declaration of Conformity Page 25 of 28...
- Page 26 EU Declaration of Conformity Page 26 of 28...
- Page 27 The WEEE Directive requires the recycling of waste electrical and electronic equip- ment in the European Union. Whilst the WEEE Directive does not apply to some of Macnaught’s products, we sup- port its policy and ask you to be aware of how to dispose of this product.
- Page 28 Macnaught Americas 614 South Ware Boulevard Tampa Florida USA, 33619 T: +1813 628 5506 E: info@macnaughtusa.com W: www.macnaughtusa.com Note: This product should be disposed of according to all applicable local and national government environment regulations and Page 28 of 28...
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