Germany dissatisfied with flow meters

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1. German E+H electromagnetic flowmeter Chinese manual: [5]

The core content of the German E+H electromagnetic flowmeter Chinese manual covers product usage methods and common troubleshooting solutions. The following is a detailed introduction: Usage, Installation Requirements, Location Selection: It should be installed in a place that is not easily affected by strong vibrations, away from strong magnetic field sources (such as large motors, transformers, etc.), to avoid interference from external factors on the measurement accuracy of the flowmeter. For example, the flow meter cannot be installed near the outlet of a large pump, as the strong vibrations and possible magnetic fields generated during pump operation can affect the normal operation of the flow meter. Pipeline conditions: The installation of the pipeline should be kept horizontal or vertical, ensuring that the fluid fills the pipeline without bubbles or impurities. For horizontal pipelines, the electrode axis of the flowmeter should be perpendicular to the horizontal line to prevent sediment from accumulating on the electrode and affecting the measurement. For example, when measuring sewage, it is necessary to ensure smooth flow of sewage in the pipeline, without blockage or sedimentation. Grounding requirement: Good grounding is the key to the normal operation of electromagnetic flow meters. The flowmeter casing, sensor, and converter should be reliably grounded, with a grounding resistance generally not exceeding 10 Ω. Grounding can eliminate external electromagnetic interference and ensure stable transmission of measurement signals. For example, in chemical production environments, poor grounding may cause significant fluctuations in flow meter

measurement data. Operation steps: Check before starting up: Check whether the installation of the flowmeter is firm, whether the connection parts are well sealed, and ensure that there is no leakage. Check if the power supply voltage meets the requirements. Generally, the power supply voltage for electromagnetic flow meters is 220V or 24V. For example, if the power supply voltage is too high or too low, it may damage the electronic components inside the flow meter. Parameter setting: Set the measurement parameters of the flowmeter according to actual measurement needs, such as range, unit, output signal type, etc. The range setting should be determined based on the maximum flow rate of the fluid inside the pipeline to ensure measurement accuracy. For example, if the maximum flow rate inside the pipeline is 100m ³/h, the range can be set to 0-120m ³/h. Start up: After confirming that all settings are correct, turn on the power and start the flowmeter. Observe whether the display of the flowmeter is normal and whether there are any alarm messages. During the initial operation of the flowmeter, close attention should be paid to its measurement data and compared with the actual flow rate to ensure accurate measurement. Common troubleshooting solutions: Inaccurate measurement data may be caused by electrode contamination, fluid medium changes, improper installation of flow meters, etc. Electrode contamination can cause changes in the conductivity between the electrode and the fluid, thereby affecting measurement accuracy; Changes in fluid media, such as density, viscosity, and other parameters, can also cause measurement results to deviate; Improper installation, such as pipelines not being filled with fluid or the presence

1. German E+H electromagnetic flowmeter Chinese manual: [5]

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