Electromagnetic flowmeter calibration | How to calibrate electromagnetic flowmeter

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1. Chongqing Chuanyi MFC electromagnetic flowmeter cannot be calibrated properly.

The calibration of Chongqing Chuanyi MFC electromagnetic flowmeter needs to be combined with hardware debugging, software parameter settings, and environmental factor calibration. The core is the calibration of zero point and range. 1. Hardware debugging ensures that the installation position of the flowmeter is reasonable, and the connection between the hall source and the pipeline is well sealed without leakage; Check that the interface connection between the sensor and the converter is secure, and that the signal transmission line is normal without interference. 2. Software debugging should clarify the flow measurement range and set the unit; Select the signal type (such as 4-20mA or 0-10V) and range according to the actual working conditions; Carry out zero calibration (output zero adjustment when there is no fluid) and range calibration (output matching calibration value when there is full flow), and make the measured value consistent with the output signal through parameter adjustment

3. Environmental factor calibration According to the medium temperature, pressure and nature (such as conductivity and corrosivity), adjust temperature compensation, pressure correction and medium attribute configuration in parameter settings to ensure stable and accurate measurement results.

2. How to adjust parameters of electromagnetic flowmeter

Parameter adjustment of electromagnetic flowmeter needs to be configured according to the model and working conditions of the instrument. The core operations include setting the first number of the instrument system, adjusting the range, and calibrating the signal output.

. 1

. Basic parameter settings • Instrument coefficient (K coefficient): Input according to the original coefficient marked on the sensor nameplate, usually the number of pulses per liter (e.g. 1.0000 represents 1L=1 pulse) • Measurement range: Calculated according to the pipeline diameter and flow rate range, the flow rate range of industrial pipelines is generally set to 0.5-10m/s • Flow unit: can choose m ³/h, L/min, kg/h, etc. (mass flow rate requires additional input of medium density) 2 Medium parameter configuration • Conductivity threshold: usually set to 5 μ S/cm, below which an empty pipe alarm will be triggered • Density setting: When measuring mass flow, the current medium density value under the working condition needs to be input • Viscosity compensation: For high viscosity media, the viscosity compensation function needs to be enabled (dynamic viscosity value needs to be input) 3 Output signal calibration • 4-20mA output: - Zero calibration: adjust the output to 4mA in no flow state - Full range calibration: adjust the output to 20mA at rated flow rate • Pulse output: - Set the pulse equivalent (the flow value represented by each pulse) - Adjust the pulse width (usually set to 50-500ms) 4. Special function settings • Automatic air traffic detection: automatically reset the output when the pipeline is empty after being enabled • Flow direction judgment: forward/reverse flow display mode needs to be set for bidirectional measurement • Small signal cutoff: set a cutoff threshold of 0.5% -5% of the range to eliminate small flow fluctuations

1. Parameter modification requires the use of specialized configuration software or handheld programmer provided by the manufacturer. 2 After modifying the key parameters

Electromagnetic flowmeter calibration | How to calibrate electromagnetic flowmeter

1. Chongqing Chuanyi MFC electromagnetic flowmeter cannot be calibrated properly.

2. How to adjust parameters of electromagnetic flowmeter

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