Metering liquid unfilled pipeline can be divided into

1. When the liquid level in the pipe of portable ultrasonic flowmeter is higher than the electrode plane, if the front and back of the pipe are connecting pipe sections, most of the electromagnetic flowmeter's measurement is also lax, but the liquid volume measured by the flowmeter includes a part of the volume of the non full pipe in the pipe, so this measurement has a big measurement disadvantage. The liquid level is higher than or less than the metering electrode plane.

2. When the liquid level in the pipe is lower than the electrode corridor, the electrode is exposed in the atmosphere, and the practical activities of the metering control circuit are in the way of leading. The measurement value and output of small flow gas flowmeter are in an arbitrary state,

The natural environment of the non full pipe is mostly the immediate drain outlet with no back pressure at present, which depends on the direct current of hydrodynamics or the flowmeter. No, the Jedi's survival is about perfect.

1. The gate diameter of the bubble in the above situation can be selected. At this time, the electrode resistor is measured by the pointer type digital multimeter, which can create a significant rise in the loop resistance of the electrode.

2. When installing the flowmeter, try to install the electromagnetic flowmeter in the middle and low end of the pipeline Zui, and pull it up at the inlet and outlet or install the flowmeter in the U-shaped pipeline.

The flowmeter with good linearity, wide measurement range ratio, high credibility and improved reliability has been widely used in the power supply manufacturing industry, especially in the raw water at the water inlet / outlet of the water plant and the original water measurement verification. Although the design scheme and production process of electromagnetic induction flowmeter continue to improve, in the whole process of customers' specific application on the spot, many elements will immediately endanger the characteristics of the instrument panel, and can not achieve the expected value of customers. In the whole process of instrument design model selection, installation, adjustment and maintenance, the customer must try to ensure all the basic standards for normal operation of the instrument panel, so as to make the instrument panel operate in a good working attitude. In consideration of rationality and durability, it is highly recommended to use a flow rate range of 1-5m / s. In this category, the flowmeter has the advantages of high measurement accuracy, good linearity, less loss of driving force, and less damage of fluid medium to the flowmeter lining and electrical stage.

b. For the fluid medium with solid particles, it is strongly recommended to use the flow rate range of 1-3m / s. Such selection is beneficial to prevent excessive damage of solid particles to the flowmeter lining and electric stage due to high flow rate

c. For the fluid medium that will lead to sediment in the pipeline, it is strongly recommended to use a flow rate range of 2-5M / s. If it can not meet the requirements, under the condition that the working pressure damage is allowed, the flowmeter smaller than the pipe diameter can be used, and the reducer can be modified. Higher flow rates facilitate removal of excess sediment. Install the flowmeter vertically or at the V-bend to remove excessive deposits..

Corrosion resistance

The selection of installation metal electrode and lining raw materials of electromagnetic flowmeter shall be based on the corrosion level of the measured fluid medium. For the complex fluid medium, such as mixed acid, hanging test should be done.