Measuring ammonia water electromagnetic flow meter is not full pipe

Case introduction

The unfilled pipeline with electromagnetic flowmeter measuring liquid can be divided into two environments where the liquid level is higher than the level of the metering electrode or lower than the level.

a. Electromagnetic flowmeter When the liquid level in the pipe is higher than the electrode level, and if there is a straight pipe section before and after the pipe, the measurement of the electromagnetic flowmeter may also fluctuate, but the liquid volume measured by the flowmeter includes The volume of the non-full pipe part in the pipeline is reduced, so this type of measurement has great measurement benefits.

b. When the liquid level in the tube is lower than the electrode contour, the electrode is exposed in the atmosphere and the metering loop is actually in an open circuit state. The measurement value and output of the electromagnetic flowmeter are in a random state, constantly fluctuating the apparent fullness.

In most cases where the pipe is not full, the direct flow of fluid or the direct discharge port without any back pressure behind the flow meter is usually used.

1. The aforementioned bubble determination method can be used. At this time, the electrode resistance is measured with a pointer multimeter. It can be found that the loop resistance of the electrode becomes significantly higher.

2. When installing the flowmeter, the electromagnetic flowmeter should be installed at the lowest end of the pipe as much as possible, and the outlet should be elevated or the flowmeter should be installed deliberately in the U-shaped pipe.

Supmea Co., Ltd. is a company specializing in the production of electromagnetic flowmeters, turbine flowmeters, vortex flowmeters, magnetic flap level gauges, thermocouples, thermal resistors, bimetal thermometers and various other products. pressure gauges of various specifications, etc., as well as manufacturers of various non-standard flow meters. The company has advanced management levels, modern professional production equipment, and advanced calibration devices.