Electromagnetic flowmeter probe good or bad judgment need to pay attention to the details of installation, cable connection, electrode and gap, and standard flow calibration to ensure accurate measurement.
1. Check whether the probe is installed correctly
Incorrect installation of the electromagnetic flowmeter probe will affect the test results, resulting in errors or even failure to use normally. Therefore, first check whether the probe is installed correctly to ensure that the installation position is correct, the fixation is firm, the inside and outside of the pipe are smooth, there is no corrosion, no dents, no accumulation and other problems.
2. Check whether the cable connection is good
Whether the cable connection of the electromagnetic flowmeter probe is good is also one of the key factors to judge its quality. If the cable contact is poor or the cable is damaged, it will cause distortion or interference of the data signal, resulting in inaccurate measurement data. Therefore, it is necessary to check the tightness of the probe cable connector, whether the contact is good, and whether the appearance of the cable is intact.
3. Check whether the electrode and the distance between the electrodes meet the requirements
The electrode is the core component of the electromagnetic flowmeter probe. It is generally made of stainless steel. Its length, spacing, etc. must meet the specifications and requirements. . If the electrodes are damaged or the spacing is inconsistent, the electromagnetic field distribution and measurement accuracy will be affected, resulting in errors in the measurement data. Therefore, it is necessary to check whether the surface of the electrode is smooth, damaged, and whether the distance between electrodes meets the specifications.
4. Check whether the gap between the electrode and the pipe wall is consistent
The gap between the electromagnetic flowmeter probe electrode and the pipe wall will also affect the measurement results. Generally, the gap should be within the allowable range of the specifications. . If the gaps are inconsistent or abnormal, it will affect the electromagnetic field distribution, resulting in measurement errors. Therefore, it is necessary to check whether the gap between the electrode and the pipe wall is consistent and whether there are any abnormalities.
5. Perform standard flow calibration
Finally, in order to ensure that the measurement results of the electromagnetic flowmeter probe are accurate and reliable, it is necessary to conduct standard flow calibration to check whether the measurement error of the probe is within the specified limit. within the range. If the measurement error exceeds the specified range, the probe needs to be adjusted or replaced.
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