First, there is medium flow in the pipeline without signal output or instantaneous flow without display Cap Making Systems,Tin Can Lid Cover Making Machine,Can Lid Cover Cap Making Machine, Twist Off Cap Making Machine Zhoushan Putuo BODA Machinery Co., Ltd. , https://www.boda-machinery.com
1. First check if the circuit wiring and power supply voltage are correct;
2. Confirm that there is indeed flow in the pipeline and is greater than the lower limit of the measurable flow;
3. Check if the setting of the small flow cutoff value is too large;
4. If the circuit wiring and power supply voltage are correct, adjust the sensitivity potentiometer and the amplification potentiometer clockwise to the end. If the flow is still not displayed, the cumulative amount does not change, indicating that there is a problem with the board, then the amplifier board needs to be replaced; if there is signal output, it should be checked whether the medium flow in the pipeline exceeds the measurable flow range of the vortex flow sensor; The flow rate is within the measurable range, indicating that the sensor head sensitivity of the sensor is already low, and the sensitivity needs to be re-adjusted;
5. Check if the sensor is good or bad. The two leads of the sensor head are removed from the magnifying plate. The resistance between the two leads of the sensor head and the resistance of the two leads of the sensor head to the outer casing should be greater than 2MΩ, otherwise the sensor head needs to be replaced. ;
6. If there is no problem with the sensor, check the pressure transmitter and the platinum thermal resistance for damage. If there is no problem, you can judge the intelligent flow totalizer is damaged.
Second, there is no medium flow in the pipeline and there is signal output or instantaneous flow display 1. First confirm that there is no medium flow or disturbance in the pipeline, check whether the vibration strength of the pipeline is too large. If the vibration is large, please use the following method to reduce the vibration: Pipeline support points are installed at the downstream 2D; under the premise of meeting the requirements of the straight pipe, the hose is excessively installed;
2. Adjust the sensitivity potentiometer counterclockwise until there is no signal output or the instantaneous flow returns to zero. When adjusting the potentiometer, it should be as slow as possible. When adjusting the angle of 5 degrees, pause for more than 10 seconds to observe whether the output returns to zero.
Third, the signal output is irregular, unstable or instantaneous flow instability
1. First check whether the media flow in the pipeline exceeds the measurable flow range of the sensor;
2. If the medium flow is within the measurable range, check whether the straight pipe section meets the requirements before and after, and confirm whether the medium in the pipeline is in a steady flow state, and there is no two-phase flow or pulsating flow phenomenon in the pipeline;
3. Check if the vibration strength of the pipeline is too large. If it is too large, please solve the problem according to fault 2;
4. Check if there is strong electrical interference signal around the meter, if there is enhanced shielding and grounding;
5. Check if the sensor is dirty, damp, damaged, or poor lead contact. If necessary, please clean or replace the sensor and tighten the lead;
6. Check if the sensor installation is concentric or the gasket protrudes into the tube. If there is installation, adjust the inner diameter of the gasket;
7. Check the sensitivity of the sensor and adjust the sensitivity; 8. Check whether the process is stable and adjust the installation position;
9. Check if there is any entanglement on the body;
10. Check for cavitation in the pipe. If there is a decrease in flow rate, increase the pressure inside the pipe.
Fourth, the measurement error is large
1. First check if the power supply voltage of the flowmeter is too large;
2. Check the instrument's analog conversion circuit zero