『Cangnan flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
I have an intelligent flow meter in my hand, which is from Cangnan, Zhejiang. I communicate with Siemens PLC 224 using Modbus protocol ..
1、 There is no communication issue. Due to the fact that the Modbus of Siemens PLC 224 requires a checksum, it is also necessary to set a checksum for the intelligent flowmeters collaborative pants. Its pure God stop bit is 1 bit, which is consistent with the Modbus stop bit, so there is no communication problem.
2、 State communication data is measured in bytes. So, reading the data from registers 0000H to 0003H is 8 bytes. You only need to convert the 6 bytes you need into 2 double word data (VD), such as converting 4 bytes into VD100 and the remaining 2 bytes into VD101. When performing the operation, calculate VD100 first, and then calculate VD101 based on the carry situation.
2. What is the flow unit of the flowmeter?
1. The flow rate of the medium measured by the flowmeter is measured in units such as cubic meters per hour (m ³/h) or liters per hour (L/h), which are used to represent the volume of the medium passing through the flowmeter per unit time
The mass flow rate of the medium can also be measured, usually in kilograms per hour (kg/h) or tons per hour (t/h). These units are very useful for application scenarios that require understanding the flow of medium quality. The selection and use of flow meters must comply with industry standards and technical specifications to ensure the accuracy, reliability, and consistency of measurement results. These standards help ensure that the measurement results of different flow meters can be compared with each other. In practical applications, the flow unit of a flow meter should be determin
3. Please advise on the selection of a natural gas flow meter..
Firstly, when selecting a flow meter, it is necessary to replace the standard cubic meter with a volumetric cubic meter, that is, convert the standard cubic meter flow rate to a volumetric flow rate. Assuming that the flow rate is 500m3/h and the standard cubic meter is 500Nm3/h, that is, 500Nm3/h is measured before pressure regulation. The pressure before pressure regulation is calculated at 0.4MPa, which is a gauge pressure of 4bar, an absolute pressure of 5bar, and a volumetric flow rate of 500/5=100m3/h. The flow rates marked on the flow meter selection table are all volumetric flow rates. Therefore, you can check the table according to 100 cubic meters, and the specifications larger than 100 cubic meters can be used. The answer is that according to this working condition, you need to choose a Roots meter with G100 specification, usually DN80, and a volumetric flow rate of 160. Fang, meet your requirements at 0.4MPa The flow rate is 500 standard cubic meters (with a volume flow rate of 100 cubic meters), but you also need to pay attention to whether the pressure before pressure regulation is the minimum operating pressure, because the lower the pressure, the larger the flow meter required. Calculate according to the minimum pressure designed.
4. Principle of Zhejiang Cangnan Gas Meter
Zhejiang Cangnan Instrument Factory mainly produces these gas flow meters: gas turbine flow meter, gas Roots flow meter, gas vortex flow meter, which is a flow meter for measuring f
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