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The electromagnetic flow meter is installed in the water circuit of the HM 500 trainer. It operates according to Faraday's Law of Induction. When a conductor is moved in a magnetic field, a voltage is induced in the conductor. The flowing fluid represents the moving conductor. The magnetic field is generated by a switched direct current of alternating polarity. The induced voltage is tapped at two insulated electrodes. The magnitude of this induced voltage is proportional to the flow rate. A display indicates the flow rate. The necessary connections are provided so that the pressure loss can be determined with the HM 500.
Learning Objectives / Experiments
- familiarisation with the principle of operation
- flow measurement
- plotting a pressure loss curve
- comparison with other flow meters