Flow meter verification experiment report

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1. Siemens flowmeter displays upper limit

The core problem of Siemens flowmeter displaying "upper limit" is that the measured value exceeds the set upper limit, and the common reasons are concentrated in three aspects: actual flow rate, parameter setting, and equipment interference. 1. Possible cause analysis: The actual flow rate is too high: The instantaneous flow rate of the fluid does indeed exceed the upper limit of the sensor range, which is common in working conditions such as sudden increase in production load or abnormal pipeline pressurization. Parameter setting error: The upper threshold was mistakenly set too low, causing the alarm to be triggered incorrectly for normal traffic. Interference or hardware failure: External electromagnetic interference, abnormal sensor signals, or circuit board faults may cause false high readings

2. Targeted solution steps: Verify the actual flow rate by comparing parallel instruments (such as pressure gauges, other flow meters) or process parameters to confirm the authenticity of the flow rate. If it exceeds the range, it is necessary to replace the equipment with a higher specification or adjust the process control. Check parameter settings: Enter the equipment menu to check the Upper Limit setting value, and refer to the nameplate to mark the range or process requirements to correct it to a reasonable range. Eliminate interference and faults: Turn off peripheral high-frequency equipment to detect electromagnetic interference, check whether the sensor circuit is loose, and whether the grounding is reliable. If the issue persists, contact Siemens after-sales service for firmware diagnosis or component replacement. Tip: Parameter adjustment requires strict adhe

2. Experimental report on flowmeter calibration

3. How to judge the quality of a mass flowmeter

Hello, KNKE, an imported mass flowmeter manufacturer from the United States, is pleased to answer your question..

1、 Electrode inspection: Use a multimeter resistance range to measure whether each electrode is conducting. One probe contacts the electrode end and the other probe measures the corresponding terminal in the junction box. If it continues to conduct, there is no problem. 2. Use a multimeter to check the quality of the excitation coil: Use the resistance range of the multimeter to measure the resistance of the coil. The value cannot be infinitely large, nor can it approach conduction. Normally, it should be between tens of ohms and hundreds of ohms (the resistance of different models of flow meters may vary). The above is the answer from the American imported quality flow meter manufacturer - KNKE. If you have a need for purchasing quality flow meters, please feel free to visit the official website of KNKE in the United States for selection and procurement, or inquire with KNKEs professional technical personnel to seek the most suitable source products for you.

4. Can differential pressure flow meters be adjusted to a larger range?

Differential pressure flow meters can be adjusted to a larger range under certain conditions, but strict evaluation and calculation must be carried out.

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