DN500 electromagnetic flowmeter

DN500 electromagnetic flowmeter

Specifically, the equivalent impedance of common winding 3 is made equal to or approximately equal to zero through transformer design. If the above two conditions are met simultaneously, the effective flow path of harmonics in the transformer can prevent harmonics from being fed back to the grid side through the transformer, thus playing a role in isolating and shielding harmonics. Filter Design 1: Characteristics Analysis of Double Tuned Filters. Based on the characteristics of the DC transmission system, an experimental platform is established as shown to verify the new filtering method and compare its effectiveness with traditional passive filtering. The rectifier station adopts a new type of converter transformer, and the secondary winding has tap connections DT5/7 and DT11/13. The output end of the primary winding, that is, the grid side, is connected to the second-order high pass filter HP2 and parallel capacitors; The inverter station adopts traditional converter transformers, which will not be explained here.

Split type electromagnetic flowmeter is mainly used to measure the volumetric flow rate of conductive liquids and slurries in closed pipelines. Including highly corrosive liquids such as acids, alkalis, salts, etc. This product is widely used in industries such as petroleum, chemical, metallurgical, textile, food, pharmaceutical, papermaking, as well as in fields such as environmental protection, municipal management, and water conservancy construction.

DN500 electromagnetic flowmeter

Starting from the tested object, insert the auxiliary grounding rod into the ground in a straight line every 5 to 1 meter, and connect the grounding test lines (red, yellow, green) from the S and E interfaces of the instrument to the auxiliary current pole, auxiliary voltage pole S, and tested grounding pole E. The simple method for measuring grounding resistance, as shown in the figure above, does not use an auxiliary grounding rod. Instead, it uses the existing grounding resistance value as an auxiliary grounding electrode and connects it with two simple test lines (i.e., the S interface is short circuited). Metal buried objects such as metal water pipes and fire hydrants, common grounding of commercial power systems, or lightning protection grounding electrodes of buildings can be used to replace the auxiliary grounding rod S. When measuring, pay attention to removing the oxide layer of the selected metal auxiliary grounding body connection point. The simple test wiring for grounding resistance is shown in the following diagram, and other operations are the same as precision measurement.

Electromagnetic flow meters are classified according to the assembly method of converters and sensors, including split type and integrated type.

Split type electromagnetic flowmeter is a commonly used form of electromagnetic flowmeter, as shown in the figure below. The sensor is connected to the pipeline, and the converter is installed near the sensor in the instrument room or easily accessible to people, with a distance of tens to hundreds of meters.

To prevent external noise from entering, signal cables usually use dual core shielded wires. When measuring liquids with low conductivity and gathering for more than 30m, in order to prevent signal attenuation caused by partial capacitance of the cable, it is also required to connect a shielding driver with the same potential and low impedance source as the core wire to the inner shielding. The converter of the split type electromagnetic flowmeter can be kept away from harsh on-site environments, making electronic component inspection, adjustment, and parameter setting more convenient.

Next, check the height, material specifications, installation location (whether there is installation in areas prone to lightning strikes), anti-corrosion measures, connection form and quality of the lightning arrester. In addition, it is necessary to check whether the lightning arrester at the top of the building, other exposed metal objects at the top of the building, and the down conductor are electrically connected; Check if there are any other electrical circuits attached to the lightning arrester; Check whether the distance between overhead lightning protection lines, networks, and protected objects meets the requirements. Grounding resistance detection. When measuring resistance, it is necessary to first estimate the magnitude of the current and select an insulated wire with an appropriate cross-section. During the preliminary test, the variable resistor r can be used to adjust the current. When measuring formally, the variable resistor is short circuited, and the grounding resistance can be calculated based on the values obtained from the ammeter and voltmeter.

The measurement principle of split type electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The split type electromagnetic flowmeter consists of a sensor and a converter. The sensor is installed on the measurement pipeline, and the converter is installed within 30 meters or 100 meters from the sensor. The two are connected by a shielded cable.

The ITECH bipolar power supply IT64215 has received widespread praise since its launch. As a bipolar power/battery simulator, IT64 *'s bipolar voltage/current output can be used as a bipolar power supply or bipolar electronic load, widely used in portable battery powered products, mobile power supplies, LEIC semiconductors, IoT and other testing fields. Four years have passed in the blink of an eye, let's take a look at the classic application cases of IT64 together. 1 Battery Test - Lithium ion Battery Charging and Discharging Cycle Test The charging process of lithium-ion batteries is to first charge with constant current, and then switch to constant voltage charging when approaching the termination voltage, ensuring that the termination voltage accuracy is within 1%.

1. Measurement is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity;