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Table of contents page 1 About this operating manual.................................................................................... 4 2 Device description................................................................................................... 5 2.1 Intended use.................................................................................................... 6 2.1 Exclusion of liability .........................................................................................
1 About this operating manual • The operating manual is aimed at specialists and semi-skilled personnel. • Before each step, read through the relevant advice carefully and keep to the specified order. • Thoroughly read and understand the information in the section (Safety Instructions "3"). If you have any problems or questions, please contact: One Omega Dr. Box 4047 Stamford, CT 06907-0047 Tel: (203) 359-1660 e-mail: info@omega.
2 Device description The FMG90 series from Omega, is a non-contact flow sensor. The measurement is performed using magnetic induction and works without any moving parts. The FMG90 is used for measuring or metering water and aqueous solutions. The compact design and independence from the intake and discharge sections allows the FMG90 to be used under a variety of conditions. Components: c Sensor housing: The sensor housing consists of plastic and has the IP65 degree of protection.
2.1 Intended use The magnetic inductive flow sensor FMG90 must only be used for measuring and metering liquids with a minimum conductivity of 20 μS/cm. WARNING! No safety component! The magnetic inductive flow sensor of the series FMG90 are not safety components in accordance with Directive 2006-42-EC (Machine Directive). ª Never use the FMG90 as a safety component. The operational safety of the device supplied is only guaranteed within its intended use.
3 Safety instructions Before you install the FMG90, read through this operating manual carefully. If the instructions contained within it are not followed, in particular the safety guidelines, this could result in danger for people, the environment, and the device and the system it is connected to. The FMG90 correspond to the state-of-the-art technology. This concerns the accuracy, the operating mode and the safe operation of the device.
4 Construction and function Construction: The measuring tube with its earthing sleeves and electrodes passes through the sensor housing and forms the external process connection of the FMG90. A magnetic field for the measurement process is generated inside the sensor housing, which also contains the sensor and signal conditioning circuitry. The two stainless steel electrodes are located in the middle of the measuring tube between the earthing sleeves.
5.1 Installation instructions CAUTION! Risk of malfunction due to external magnetic fields! Magnetic fields close to the device can cause malfunctions and should be avoided. ª Ensure that no external magnetic fields are present at the installation site of the FMG90. • The FMG90 can always be installed anywhere along the pipeline. Straight sections of piping are preferable, however. • Installation can occur in horizontal and vertical pipes.
• If two or more FMG90 devices are used side by side, maintain a separation of at least 2.5 cm between adjacent devices. If adjacent devices are too close together, operation of both devices may be impaired due to mutual interference. 5.2 Assembly The FMG90 is installed directly into the pipeline. The compact design and light weight of the unit make wall-mounting unnecessary. IMPORTANT NOTICES: • Only use suitable gaskets for installation. • Observe the flow direction indicated on the type plate.
6 Electrical connection The electrical connection of the FMG90 is via the 4-pin plug M12x1 at the top. The corresponding connection cables with moulded coupling socket are available in various lengths. CAUTION! Electric current! The electrical connection should only be carried out by a fully qualified electrician. ª De-energize the electrical system before connecting the FMG90. Connection and wiring: ª Screw the coupling socket of the connection cable to the plug of the FMG90.
7 Commissioning and measuring operation Before switching on the FMG90 for the first time, please follow the instructions in the following section. 7.1 Commissioning Check that the FMG90 has been installed correctly and that all screw connections are sealed. the electrical wiring has been connected properly. the measuring system is vented by flushing. ª Switch on the supply voltage. If the red LED lights permanently; then the FMG90 is ready for use and goes into measuring operation. 7.
9 Disassembly and disposal CAUTION! Risk of injury! Never remove the device from a plant in operation. ª Make sure that the plant is shut down professionally. Before disassembly: Prior to disassembly, ensure that the equipment is switched off and is in a safe and de-energised state. the equipment is depressurised and has cooled down. Disassembly: ª Remove the electrical connectors. ª Remove the FMG90 using suitable tools.
10 Technical data The technical data of customised versions may differ from the data in these instructions. Please observe the information specified on the type plate. Type FMG 91 FMG 92 FMG 93 Measurement device characteristics Flow range [GPM] 0.066…1.3 0.26…5.3 Accuracy Repeatability Output signal starting from [GPM] Max. flow rate [GPM] 3.3…66 0.27 0.52 1.05 1.3 1.6 6.6 15.8 31.7 63.4 79.3 < 100 ms red LED = Supply voltage • green LED = Flow 3000 1500 750 380 300 1.0 2.5 5.0 10.
10.1 Materials table Component Sensor housing Measuring tube Material Componentwetted ABS PVDF X Process connections PVDF O-ring EPDM X Electrodes Stainless steel 316L X Grounding rings Stainless steel 316L X X 10.
10.3 Dimensions FMG 91 - 95 Type L1 FMG 91 4± 0.02 0.83± 0.01 ½ - 14 NPT Ø 0.31 FMG 92 4± 0.02 0.83± 0.01 ½ - 14 NPT Ø 0.31 4.02± 0.02 0.83± 0.01 ¾ - 14 NPT 1 – 11.5 4.41± 0.02 0.98± 0.01 NPT 1 – 11.5 4.41± 0.02 0.98± 0.01 NPT Ø 0.55 FMG 93 FMG 94 FMG 95 FMG 96 L2 D1 D2 Ø 0.71 Ø 0.
M-5204/1112
