Agricultural Irrigation Water Meter

When the inspection methods of similar measuring instruments are determined to be applicable to the metrological verification of measuring instruments according to the trial results, corresponding records shall be given in the use documents of these measuring instruments. The attachments of metrological verification procedures include calculation examples of measurement result processing, tables of calculated values Terms and definitions of numerical relationship curve and other calculation data technical instructions of auxiliary equipment and devices used in metrological verification special provisions on safety technology of standard measuring instruments to be verified and auxiliary equipment used in metrological verification are helpful to eliminate metrological verification errors and improve the quality of verifiers For efficiency data, such as the error of measured parameter value during verification, the calculation table of maximum allowable standard value, which has been calculated in advance, and nomogram, etc. There are two new types of water measuring instruments in yanghantang. When rivers, lakes, reservoirs or groundwater flow through channels to the water intake point, they all contain a certain degree of sediment, grass roots, leaves and other sundries. When pumping with pipeline, the following two instruments can be used to measure the extracted water. Agricultural water meter agricultural water meter can be used for agricultural pipeline irrigation. The instrument is an iron shell, which is connected in series in the water supply pipeline by flange, thread or other means. When the water flows through, the rotating blade in the instrument is impulsive, and then the metering mechanism in the sealed chamber is driven by magnetic transmission, and the six digit counter on the meter starts counting. The difference between two readings in any period multiplied by the coefficient marked on the table is the water flow in this period after verification before leaving the factory. Since the metering mechanism is sealed and the water cannot enter people, the sediment and other sundries in the water will not affect the metering of the water meter. If the acid-base of water is too large, the water contacting parts of the water meter can be made of corrosion-resistant materials. The agricultural water meter can read directly from the meter or be used as telemetry. The metering signal of the water meter can be transmitted to the indoor display through wires or further processed. At this time, another DC power supply is required. The nominal diameter series of agricultural water meter is basin water meter, which is used for large-diameter water intake pipeline and can also be directly installed on the existing water intake pipeline. The water meter is cylindrical, diameter, height about or with bottom valve, and the lower part is saddle shaped. During installation, a diameter hole shall be opened on the pipe wall, and the bottom of the water meter shall be mounted on the pipe for welding or bolt fixation. A rotating blade in the middle of the saddle extends into the pipe about through the opening of the pipe wall. When the water flows through, the rotating blade rotates, and the six digit counter in the upper sealing chamber starts counting through magnetic transmission. Read these six digits and multiply them by the standard coefficient on the table, that is, the water passing through the pipeline. The coefficient can be verified by the factory. The water coefficient of the water meter for water pipes with large pipe diameter exceeding can be determined through on-site calibration after installation to ensure the accuracy of measurement. The water meter can be equipped with telemetry function for reading and recording indoors. The power supply used is DC power supply. The water meter with bottom valve can be operated without water supply during the first installation and subsequent disassembly and maintenance.