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1. What are the calibration parameter standards for flow meters in atomization scenarios?
The calibration parameter standards for flow meters in atomization fields need to be classified according to application scenarios. Electromagnetic flow meters are commonly used in industrial atomization scenarios, while medical atomization scenarios need to follow medical equipment measurement specifications. The parameter requirements for both types of scenarios have clear rules.
1. Industrial atomization scene: Taking electromagnetic flowmeter as an example (1) Basic parameters: 1 The measurement of pipeline diameter must strictly match the actual inner diameter of the pipeline; 2. The flow unit can be selected as needed, such as m ³/h, L/s, etc; 3. The range setting should be combined with the actual flow range to avoid insufficient measurement accuracy of low flow caused by a range that is too large, and triggering an over limit alarm if it is too small. （2） Advanced parameter 1 Excitation mode: Small caliber instruments can choose 1/16 power frequency range, while large caliber instruments are recommended to choose 1/20 or 1/25 power frequency range; 2. Small signal cutoff function: It is recommended to set the cutoff point to 0-5% of the range, and you can choose whether to synchronize the cutoff display and signal output according to your needs; 3. Air traffic control alarm threshold: set at 3-5 times the measured conductivity; 4. Reverse output permission function: can be flexibly activated according to actual process requirements; 5. Measurement of damping time: adjustable between 1-64 levels, long damping is suitable for pulsating flow accumulation scenarios, short damping responds faster and adapts to p
II. Medical Atomization Scenarios (Taking Medical Compression Nebulizer as an Example) (1) Flow Meter Debugging Requirements 1 Connect the test device according to the specifications to ensure that the atomizer is in normal operation and adjust the atomization rate to the maximum; 2. Quality flow meters with an accuracy level of not less than 2.5 must be used for calibration measurement, and the measurement results must meet the requirements of relevant product standards.
2. The impact of flow meter damping on PID parameters
Damping time will affect the response speed of the PID controller.
. In a PID control system, the damping time of the flow meter can affect the response speed of the controller to changes in flow rate. The larger the damping time, the slower the response speed of the flow side modulus meter reading, and the controllers response to flow rate changes will also slow down; On the contrary, the smaller the damping time, the faster the response speed of the flow meter reading, and the controllers response to flow changes will also become faster.3. Increasing damping time of flowmeter
The core function of increasing damping time of flowmeter is to smooth the fluctuation data, but it needs to balance the response speed and accuracy.
.1. Function Analysis 1 Data smoothing: Increasing the damping time can effectively filter out rapid fluctuations in the flow signal, making the instrument display value tend to be stable, especially in pump valve start stop or fluid turbulence scenarios, avoiding severe data jumping
2. Anti interference enhancement: can suppress transient outliers caused by external factors such as pipeline vi