Intelligent integrated electromagnetic flowmeter

How to choose the right type

The selection of instruments is a very important task in instrument applications. Relevant data shows that 2/3 of instrument failures in practical applications are caused by incorrect selection or installation of instruments. Please pay special attention.

◆Intelligent integrated electromagnetic flowmetercollect data

1. Composition of the tested fluid

2. Maximum traffic, minimum traffic

3. The highest work pressure

4. Zui high temperature, Zui low temperature

The tested fluid must have a certain degree of conductivity, with a conductivity>5 μ S/CM

The maximum and minimum traffic must comply with the numbers in the table below

The actual maximum working pressure must be less than the rated working pressure of the flowmeter.

The maximum working temperature and minimum temperature must meet the temperature requirements specified by the flowmeter.

Determine if there is negative pressure present.

You can choose the corresponding electromagnetic flowmeter based on the flow rate in the table above. If the inner diameter of the selected electromagnetic flowmeter does not match the inner diameter of the current process pipeline, it should be shrunk or expanded.

If the pipeline undergoes shrinkage, consideration should be given to whether the pressure loss caused by shrinkage will affect the process flow.

From the perspective of product price, smaller caliber electromagnetic flow meters can be chosen to relatively reduce investment.

When measuring clean water, the economic flow rate is 1.5-3m/s. When measuring solutions that are prone to crystallization, the flow rate should be appropriately increased to 3-4m/s to achieve self-cleaning and prevent adhesion and sedimentation; When measuring abrasive fluids such as slurry, the flow rate should be appropriately reduced to 1.0-2m/s to reduce wear on the lining and electrode. Actual applications rarely exceed 7m/s, and exceeding 10m/s is even rarer.

Intelligent integrated electromagnetic flowmeterCorrect wiring

① The excitation cable can use YZ medium-sized rubber sheathed cable, which has the same length as the signal cable

② Signal cables and other power cables must be strictly separated and cannot be laid in the same pipe, parallel, or twisted together. They should be separately threaded in steel pipes.

③ The signal cable and excitation cable should be kept as short as possible, and excess cables should not be coiled together. The excess cables should be cut off and re welded. When the cables enter the sensor electrical interface, they should be made U-shaped at the port to prevent rainwater from penetrating into the sensor.

④ The connection between the excitation cable and the converter of the split type electromagnetic flowmeter is completed with wiring, and the converter and external connection are the same as the integrated electromagnetic flowmeter.

Intelligent integrated electromagnetic flowmeterThe wiring:

① The excitation cable can use YZ medium-sized rubber sheathed cable, which has the same length as the signal cable

② Signal cables and other power cables must be strictly separated and cannot be laid in the same pipe, parallel, or twisted together. They should be separately threaded in steel pipes.

③ The signal cable and excitation cable should be kept as short as possible, and excess cables should not be coiled together. The excess cables should be cut off and re welded. When the cables enter the sensor electrical interface, they should be made U-shaped at the port to prevent rainwater from penetrating into the sensor.

④ The connection between the excitation cable and the converter of the split type electromagnetic flowmeter is completed with wiring, and the converter and external connection are the same as the integrated electromagnetic flowmeter.