Flow meter

The flow signal of the electromagnetic flowmeter is based on the measured conductive liquid as the reference potential. The conductive liquid in the entire measurement pipe is regarded as a conductor with zero resistance. The two electrodes form a differential signal voltage to the conductive liquid. Therefore, if the signal contact point is unreliable, the […]

1. Empathy – Do the right thing “The key question is to find the key to the problem.” If you want to find opportunities for process control improvement, you need to understand and care about the operators! Not only have enough respect for their operations, but also find ways to reduce their operational interference. High-frequency

1. It is forbidden to mix signal cables and power supply cables in one multi-core cable! 2. It is strictly forbidden to stick to oil when maintaining oxygen pipeline instrument equipment. Oil-free transmitters and pressure gauges are strictly forbidden to be mixed with ordinary gauges. 3. When repairing and removing wires from the instrument, you

The lubrication cycle should be determined according to the specific situation and mainly includes the following parts: 1. Pneumatic cam deflection valves, pneumatic ball valves, pneumatic butterfly valves, and rotating parts of electric actuators; 2. Protection box, door shaft of the insulation box, and fastening bolts of the junction box; 3. Bolts and nuts for

1. When opening holes for instruments, avoid opening holes in formed pipes. 2. Pay attention to the length of the straight pipe section before and after the flow meter. 3. If there are electromagnetic and mass flow meters with grounding requirements, they should be grounded according to the instructions. 4. When welding process pipelines, the

1. Before installing the instrument, the process pipeline should be purged to prevent ferromagnetic substances retained in the pipeline from adhering to the instrument, affecting the performance of the instrument or even damaging the instrument. If unavoidable, a magnetic filter should be installed at the inlet of the instrument. The instrument itself does not participate

In the industrial field, electromagnetic flowmeters are widely used, such as flow measurement of circulating water pipelines, fresh water pipelines, and salty sewage pipelines in refinery process units; flow measurement of medium pipelines such as concentrated sulfuric acid, dilute sulfuric acid, and intermediate acids in alkylation units. Flow measurement of pipelines such as alkali liquid

MAIN CONTENTS This company standards set rules for the mass flow meter’s product classification, technical requirements, testing methods, inspection rules and marks, packing, transportation and storage. The standards are applicable to the mass flow meter measuring liquid in the pipe with pressure. NORMATIVE REFERENCES Some basic rules and terms of the following documents are recommended

1. Overview 1. Under specific flow conditions, part of the fluid kinetic energy is converted into fluid vibration, and its vibration frequency has a certain proportional relationship with the flow rate (flow rate). A flow meter that works based on this principle is called a fluid vibration flow meter. There are currently three types of

How to choose between a programmable logic controller (PLC) and a decentralized control system (DCS) requires a detailed analysis of the specific situation, because different application scenarios have different requirements for the control system. PLC 1. From switching control to sequence control and transportation processing, it is a multi-function such as continuous PID control from