Problems with Yokogawa electromagnetic flowmeters
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After being in use for a period of time, the Yokogawa electromagnetic flowmeter in question showed a low flow rate. An inspection revealed low insulation resistance; upon sending it for repair, it was found that the lining had been peeled and cracked, yet no repairs were carried out； After using it for a while, the traffic suddenly decreases occasionally again. Upon rechecking, the insulation resistances are low again.
How is the electrode corrosion? The lining is almost ready as well. What about grounding?
What is this measuring? The operating environment seems to be quite harsh
The insulation resistance is low; how low exactly? Even if it’s several dozen megohms, the decrease in traffic you mentioned may not occur. Also, are the electrode-to-ground and coil-to-ground voltages low? As for the reasons for the reduced insulation, it is mostly due to moisture inside the sensor, while cracks at the edges of the lining can allow water vapor to penetrate.