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Summary of Contents for Flomec EGM Series
- Page 1 EGM Series Oval Gear Flow-meters Operation Manual Version 18.16...
- Page 2 General Information This manual provides the necessary information for operation and maintenance of your Oval Gear flow-meter; for information on any integral electronics or accessories fitted to your flow-meter please consult the relevant electronics or accessory manual. Your Oval Gear flow-meter should only be installed and maintained by persons familiar with local regulations, particularly those for workplace Health and Safety.
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Page 3: Table Of Contents
Table of Contents Introduction ....................4 Operating Principle ..................4 Specifications ....................5 1.2.1 Small Capacity Models ................5 1.2.2 Medium Capacity Models .................6 1.2.3 Electrical Specifications ................7 Pre-Installation ....................8 Pre-Installation Testing ..................9 Mechanical Installation ................10 Installation Orientation .................10 Piping Construction ..................11 Filtration / Straining ..................12 Pipe Connections ....................12 Fuel Consumption Measurement ..............13... -
Page 4: Introduction
Aluminium meters are suitable for fuels, fuel oils & lubricating liquids. EGM Series Oval Gear flow-meters provide a pulse signal output capable of interfacing to most monitoring and control systems, such as a PLC or DCS. The cable output from the flow-meter can also be wired to instruments such as totalisers, rate totalisers or batch controllers. -
Page 5: Specifications
1.2 Specifications 1.2.1 Small Capacity Models Model EGM004 EGM006 EGM008 Nominal Size 4mm / 1/8” 6mm / 1/4” 8mm / 3/8” Nominal 3cP Flow range (L/hr) 1 ~ 36 2 ~ 100 15 ~ 550 Nominal 3cP Flow range (GPH) 0.26 ~ 9.5 0.5 ~ 26.4 4 ~ 145... -
Page 6: Medium Capacity Models
1.2.2 Medium Capacity Models Model EGM015 EGM020 Nominal Size 15mm / 1/2” 20mm / 3/4” Nominal 3cP Flow range (L/min) 1 ~ 40 3 ~ 80 Nominal 3cP Flow range (GPM) 0.3 ~ 10.6 0.8 ~ 21.1 Accuracy ( liquids ≥ 3cP) ±... -
Page 7: Electrical Specifications
1.2.3 Electrical Specifications Standard Pulse Output Output Type NPN Open Collector Voltage Range 5 ~ 24VDC (±0.5%) Hall Effect Output Current Draw 20mA Maximum Switching Current 10mA Maximum Fuel Consumption Option Output Type NPN Open Collector Voltage Range 5 ~ 24VDC Hall Effect Output Current Draw 20mA Maximum... -
Page 8: Pre-Installation
Aluminium meters are generally only suitable for fuels and oils, if you have purchased an Aluminium meter for a water based liquid please check suitability with your Flomec distributor prior to installation That the system pressure and temperature are within the limits shown on the flow- meter name-plate. -
Page 9: Pre-Installation Testing
2.1 Pre-Installation Testing Testing of a flow-meter before installation is a common source of mistakes that has the possibility to permanently damage your flow-meter. Tests should always be carried out in conditions that match the operation parameters that the meter was selected for; most importantly flow rate and chemical compatibility. -
Page 10: Mechanical Installation
3. Mechanical Installation It is strongly advised that before installation of your meter, you thoroughly read and understand the information presented in this section, as failure to install your meter according to the guidelines below may cause permanent damage to your meter, or a reduction in system performance and reliability. -
Page 11: Piping Construction
Liquid can flow in a horizontal direction, or a vertical direction, but in each case the rotor shafts must be in a horizontal plane. The direction of flow is not important, as the output is non-directional; for any installations where pulses from reverse flow are not desired a check valve (or other suitable non-return valve) should be used. -
Page 12: Filtration / Straining
The best piping designs provide a bypass line, as shown in the following diagram, which allows isolation of the flow-meter and associated strainer from the main process line. The benefits of installing a bypass line are that your system can be purged before start-up, to remove any foreign particles or air slugs that would cause serious damage to your meter. -
Page 13: Fuel Consumption Measurement
3.5 Fuel Consumption Measurement When purchased with the ‘Fuel Consumption’ option the EGM Series flow meters are well suited to the measurement of fuel consumption on injected diesel or petrol/gasoline combustion engines. The flowmeters should be purchased and installed in pairs; with flowmeter ‘A’... -
Page 14: Electrical Installation
4. Electrical Installation Two types of output are available on an EGM Series Oval Gear flow-meter; the standard output is a single NPN Hall Effect sensor, providing a square wave frequency output signal which is linearly proportional to volumetric flow. -
Page 15: Hall Effect Outputs
Do not install a meter in close proximity to any sources of strong magnetic fields, such as high power electric motors or solenoids, as these may affect the magnetic sensors within the meter. Likewise, it is recommended that instrument cables are not located close to sources of strong magnetic or electric fields due to the risk of induced interference in the cables. -
Page 16: Rtd Output (Pt100)
4.3 RTD Output (PT100) The RTD (Resistance Temperature Detector) is a 3-wire 100 Ohm Platinum Resistance thermometer (PT100), built into the meter cap of the flow meter. The RTD is directly mounted to the PCB of the flowmeter, which is then encapsulated into the meter cap using a thermally conductive epoxy potting compound, ensuring quick thermal transfer from the process liquid to the temperature sensor. -
Page 17: Wiring Diagrams
4.4 Wiring Diagrams 4.4.1 Standard Pulse Output Board *A Pull-Up Resistor must be installed between the signal and +VDC connections on the receiving instrument – unless the instrument has an integral pull-up* 4.4.2 Fuel Consumption Option *A Pull-Up Resistor must be installed between the signal and +VDC connections on the receiving instrument –... -
Page 18: Fuel Consumption Wiring With F127 Flow Computer
4.4.3 Fuel Consumption Wiring with F127 Flow Computer * Regulated DC supply should be in the range of 8-30 Volts DC. When powering the flow computer from a vehicle charging system a DC-DC converter is recommended to protect the system from voltage spikes. 4.5 Meter Calibration Factor (K-Factor, Scale Factor) Each flow-meter is individually calibrated and is marked with the number of pulses per unit volume (e.g. -
Page 19: Commissioning
5. Commissioning The most common cause of damage to Oval Gear meters is improper start-up procedure after an installation or piping modification. New or modified piping is generally full of large volumes of air, and possibility contains foreign matter. If your piping has been designed carefully as outlined in this manual, it will be an easy task to prepare your system for safe commissioning of your flow-meter. -
Page 20: Maintenance
6. Maintenance Adhering to the installation instructions is the most important requirement to ensure that your Oval Gear meter provides the maximum level of operational performance. Oval Gear meters are a mechanical device, and so will be subject to some wear and tear over their operational life, except under ideal circumstances. -
Page 21: Parts Identification
6.1 Parts Identification For identification of the parts within your Oval Gear meter refer to the following image and parts identification table. Part numbers for replacement components are found in the next section of this manual. Parts Identification Table Item No. Description Meter Body Rotors... -
Page 22: Flowmeter Disassembly
6.2 Flowmeter Disassembly To access the oval gear rotors, or to remove/replace the meter cap and pulse output board; undo the meter cap screws (6), and carefully separate the meter cap from the meter body (1), avoiding misplacing or damaging the O-ring (3) or the rotors (2) – when servicing an EGM004 meter please note that the rotors can stick to the underside of the meter cap due to liquid surface tension, making it very easy to drop and subsequently damage the rotors. -
Page 23: Spare Parts
Stainless Steel cap assembly 1402199 1402201 with Standard PCB Stainless Steel cap assembly 1402205 1402207 with Fuel Consumption PCB Cover Plate FLOMEC Cover Plate 1306106 1306107 Meter Cap A2-70 Button Head Cap Screws M5x25 BHCS 304SS Screws Viton / FKM BS022V... -
Page 24: Medium Capacity Models
(inc. PCB) Stainless Steel cap assembly 1402203 with Standard PCB Stainless Steel cap assembly 1402209 with Fuel Consumption PCB Cover Plate FLOMEC Cover Plate 1306108 Meter Cap A2-70 Button Head Cap M6x25 BHCS 304SS Screws Screws Viton / FKM BS142V... -
Page 25: Troubleshooting
8. Troubleshooting 8.1 Fault Finding Pulse meters have two distinct sections: the mechanical wetted section housing the rotors and the electrical section housing the pulse output board. The aim of fault finding is to trace the source of the fault to one of these sections. If a fault is traced to an instrument section, refer to the relevant instruction manual. -
Page 26: Troubleshooting Guide
8.2 Troubleshooting Guide Possible Symptom Solution Cause - confirm shielded cable has been used Output Signal - ground cable shield at instrument end Interference - re-route cabling from high electrical energy sources, or power carrying cables. Entrained air - Remove source of air or gas entrapment Meter or gas - Install an upstream air-eliminator... - Page 27 Notes:...
- Page 28 EGM Series Operation Manual IM-EGM-1816...
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