Reasons for small flow values in electromagnetic flow meters may include contaminated or damaged electrodes, inaccurate range settings, and improperly set temperature compensation coefficients.
The electromagnetic flowmeter is a common flow measurement instrument, but in actual use, the flow value sometimes appears to be low. The possible reasons are as follows:
1. The electrode of the electromagnetic flowmeter is contaminated or damaged, making the current signal unstable and affecting the accuracy of flow measurement.
2. The range setting of the electromagnetic flowmeter is inaccurate, resulting in a small flow display value.
3. The temperature compensation coefficient setting of the electromagnetic flowmeter is inaccurate, so that the influence of temperature on flow measurement is not correctly compensated.
2. Adjustment method
1. Clean and repair the electrodes
First of all, check whether the electrodes of the electromagnetic flowmeter are contaminated or damaged. If there are any problems, they should be repaired in time. Perform cleaning or repairs. When cleaning the electrode, you should use appropriate cleaning fluid and operate in strict accordance with the manufacturer's standards to avoid damage to the electrode.
2. Recalibrate the range
If the range setting of the electromagnetic flowmeter is inaccurate, it can be corrected by recalibrating the range. The specific method is to inject a certain amount of standard liquid into the pipeline, then calculate the actual flow rate based on the volume and time of the standard liquid, and finally compare it with the flow rate displayed by the electromagnetic flowmeter to obtain the correct range setting.
3. Calibrate temperature compensation
Inaccurate setting of the temperature compensation coefficient of the electromagnetic flowmeter may lead to a small flow display value, which can be corrected by calibrating temperature compensation. The specific method is to conduct flow tests at different temperatures and calculate the correct temperature compensation coefficient based on the test results to correct the problem of small flow values.
3. Summary
When the flow value of the electromagnetic flowmeter is too small, it can be repaired by cleaning and repairing the electrode, re-calibrating the range, calibrating temperature compensation and other methods. These methods require professional operation to ensure the accuracy and reliability of the electromagnetic flowmeter.
Hangzhou Economic Development Area，Hangzhou 310018，China
