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Dichuan instrument electromagnetic flowmeter field failure treatment case of a circuit board factory

Update: 2015-12-4 0:34:12 Click:
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Introduction

Dichuan instrument electromagnetic flowmeter field failure treatment case of a circuit board factory

                        Dichuan instrument electromagnetic flowmeter field failure treatment case of a circuit board factory

Installation site: sewage disposal system of a chemical plant
Fault appearance:
装置后流量计运转正常,丈量准确度高,在运用一段时间后发现流量计显现有时会回零,并且显现值也有动摇表象。 After the electromagnetic flowmeter device is installed, the flowmeter operates normally, and the measurement accuracy is high. After using it for a period of time, it is found that the appearance of the flowmeter sometimes returns to zero, and the displayed value also shakes.

Cause:
The field survey found that because the electromagnetic flowmeter is a separate device, the sensor device is in the shaft. Due to the rain, there is deep water in the shaft. The sensor enters the junction box through long-term immersion in moisture, causing the insulation resistance between the field coil and the ground. It is lowered so that the flowmeter cannot work normally.

Solution:

        。 Open the junction box at the sensor and dry the water vapor in the junction box with a hair dryer to make the insulation resistance greater than 20MΩ . Seal the junction box inlet with silicone.

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