1. Symptom: The flow rate is displayed abnormally The data changes drastically Cause analysis: The sensor is installed in a place where the pipeline vibration is large or the flow state device is changed (such as regulating valve, pump, and downflow orifice).
This is a highly rated and comfy heated car seat you will find great for your car during the cold winters. It is a large seat with dimensions of 48 x 27-cm; hence provides exceptional comfy. Other than this, it has quality large heating panels and NiCr heating wire that enhances the heat conduction process. The seat can heat from 114-degrees F to 131-degrees F, allowing you to select on the ultimate temperature needed.
What is more, the heated car seat has dual safety that includes flame retardant and insulation protection. The overheat protection thermostat ensures that it doesn`t overheat. Heated Electric Pads,Baby Seat Ventilation,Seat Heater Cooler,Car Seat Back Ventilation JiLin Province Debang Auto Electric Co.,Ltd. , https://www.dbatelectric.com
Solution: Mount the sensor away from the vibration source or move upstream of the changing flow device
2. Symptom: Incorrect reading
Analysis of the causes: A. Sensors The sediments on the top and bottom of horizontal pipes interfere with ultrasonic signals. B. The sensors are installed on the pipes with water flowing down, and the pipes are not filled with fluid.
Solution: A. Mount the sensor on both sides of the pipe B. Install the sensor on the fluid-filled pipe section
3. Symptom: The reading increases when the control valve is partially closed or the flow is reduced
Analysis of reason: The sensor is installed too close to the downstream of the control valve. When the valve is partially closed, the flow meter actually measures the flow rate that controls the reduced diameter of the valve, and the flow rate increases as the bore diameter decreases.
Solution: Move the sensor away from the control valve, the sensor upstream from the control valve 30D or the sensor into the control valve upstream from the control valve 5D.
4. Symptom: The flowmeter works normally and suddenly the flowmeter no longer measures flow
Analysis of the causes: A. The measured medium changes. B. The measured medium is vaporized due to excessive temperature. C. The temperature of the measured medium exceeds the sensor's limit temperature. D. The couplant below the sensor is aging or depleted. E. The instrument has exceeded its own filter value due to high frequency interference. F. Loss of data in the computer. G. Computer crashes.
Solution: A. Change the measurement method B. Reduce the temperature C. Reduce the temperature D. Recoat the coupling agent E. Keep away from the interference source F. Reenter the value G. Restart the computer
5. Symptom: The sensor is good, but the flow rate is low or there is no flow rate
Analysis of reason: A. Due to paint and rust outside the pipeline, the rust is not removed. B. The surface of the pipe is uneven or installed at the welding seam. C. The roundness of the pipe is not good, the inner surface is not smooth, and there is tube lining type scaling. This may happen if the pipe is a cast iron pipe. D. The measured medium is pure or the suspended solids are too low. E. The sensor is installed on the fiberglass pipe. F. Sensor mounted on the sleeve will weaken the ultrasonic signal. G. The coupling between the sensor and the pipeline is not good, and the coupling surface has gaps or bubbles.
Solution: A. Clear the pipe again and install the sensor. B. Smooth the pipe away from the weld. C. Select a smooth pipe material or lining where the inner surface of the steel pipe or the like is smooth. D. Select the appropriate other type of instrument. E. Remove the glass fibers. F. Move the sensor to the unsleeved pipe section. G. Reinstall the couplant.
6. Symptoms: Abnormal readings Cause Analysis: A. Devices that strongly fluctuate the flow state, such as venturis, orifice plates, vortex streets, turbines, or partially closed valves, are within the range of sensor transmission and reception. Inaccurate readings. B. The flowmeter input pipe diameter does not match the pipe inner diameter.
Solution: A. The sensor is installed away from the above device. The sensor is located upstream from the device 30D and downstream from the device 10D or moved upstream of the device. B. Modify the diameter to match it. 
