Haikou High Temperature Mass Flow Meter | eH Mass Flow Meter Model

『Haikou High Temperature Mass Flow Meter』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)

1. The core problem of inconsistent flow slope and nameplate parameters of a mass flowmeter usually involves calibration errors, changes in medium properties, or mechanical losses, and these three factors need to be prioritized for investigation. 1. The difference between the direction flow slope and the nameplate can be quickly identified through the following three types of issues: • Calibration offset: Check if the last calibration time exceeded the recommended cycle (usually 1-2 years), or if the calibration parameters were accidentally touched during operation. • Changes in physical properties of the medium: Compare the current temperature, density, viscosity of the medium with the equipment design conditions to determine if they match. For example, high temperatures can cause significant gas expansion and significantly affect mass flow rate. • Mechanical damage/blockage: Observe whether there is sediment or wear on the inner wall of the measuring pipe, abnormal vibration or loose pipe support may also interfere with sensor data

2. Special verification method • Air traffic control test: After disconnecting the pipe, start the flow meter. If there is still a flow value, it indicates that the sensor has zero drift and needs to be returned to the factory for adjustment. Third party verification: Use standard weight method or volume tube testing device to compare the actual flow value with the instrument reading. If the error exceeds 0.5%, mandatory calibration is required. • Data trend analysis: Retrieve historical operating curves, and sudden slope changes may correspond to events such as medium switching and equipment collision.

3. High frequency misoperation reminder - Some brands (such as Emerson, E

+H) of secondary instruments need to manually switch between mass flow/volume flow modes, and incorrect parameter settings can directly lead to slope deviation. -The split type flowmeter needs to check the grounding of the signal cable shielding layer, as strong electromagnetic interference may cause a random error of 0.1-5%. -Insufficient front and rear straight pipe sections (should be ≥ 10 times the pipe diameter) during the installation of the double flange flowmeter will damage the flow field distribution.

2. What is the working principle of a mass flowmeter? The operating mechanism of a thermal mass flowmeter is based on the Kings law. By using an external heat source to heat the gas being tested inside the pipeline, the heat from the heat source will flow along with the gas. By monitoring the temperature changes inside the pipeline cluster before and after gas flow, the mass flow rate of gas can be calculated. Another method is to measure the relationship between the energy required to heat a gas to a specific temperature and the mass of the gas, in order to determine the mass flow rate of the gas. The thermal mass flowmeter consists of two thermal resistors as sensors, one responsible for heating and the other for monitoring changes in gas temperature. When these two sensors are placed in the gas inside the pipeline, the heated sensors will gradually cool down, while the temperature sensor will display the change in gas temperature. As the gas flow rate increases, the amount of heat carried away increases, and the temperature of the temperature sensor decreases accordingly. The change in temperature before and after the temperature sensor is linearly proportional to the mass of gas passing through the pip

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