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1. What is the reason why an ultrasonic flowmeter displays 0000 despite having a flow rate?
The main reason why an ultrasonic flowmeter displays 0000 despite having a flow rate is due to abnormal signal reception or incorrect parameter settings, which result in the system determining that there is no effective flow rate. 1. Installation and sensor issues: Improper installation position: too far away from the pipe wall, close to turbulent areas such as bends/valves, can cause distortion of ultrasonic signals. Sensor failure: dirty transducer surface, dry coupling agent, short circuit of the circuit or corrosion of the joint, requiring cleaning, testing or replacement of coupling agent. Failure: special coupling agent needs to be reapplied to ensure sound wave transmission. 2 Abnormal working conditions and medium flow rate: When the flow rate is below the minimum detection threshold of the flowmeter (usually 0.1m/s), it cannot trigger a change in the measured medium state. High temperature gasification, excessive bubbles or impurities will affect the ultrasonic penetration rate. Temperature/pressure exceeding the limit: beyond the calibration range of the sensor (commonly -30 ℃~160 ℃), a heat dissipation or pressure reduction device needs to be installed System configuration error, parameter settings do not match: parameters such as pipe diameter, medium type (water/oil/gas), range, etc. need to be matched with the physical object. Signal processing exception: Converter water ingress or circuit board failure can cause signal decoding failure Quick troubleshooting steps: ① Check if the installation spacing of the sensor meets the formula requirements (pipe diameter x coefficient) ② Clean the surface of the transducer and reapply the coupling agent ③ Confirm that the pipeline is full and the flow rate is greater than 0.3m/s ④ Check if the parameter settings match the actual medium ⑤ Use an analog signal generator to detect if the converter is working properly. If the above operation is ineffective, a portable ultrasonic flowmeter should be used for on-site calibration and comparison, or contact the manufacturer to test the sensor transmission power.
2. Is there a requirement for the insertion depth when installing the Cologne ultrasonic flowmeter?
There are clear requirements for the insertion depth of the probe when installing the Cologne ultrasonic flowmeter, and it must be strictly operated according to the specifications. 1 The determination of insertion depth is mainly determined by the diameter of the pipeline, and the larger the diameter, the deeper the insertion depth. Small pipe diameters (such as below DN100) are usually inserted by a few centimeters, while large pipe diameters (such as above DN1000) may need to be inserted by more than ten centimeters or even deeper.
2. Core installation requires that the probe must reach a stable flow velocity area near the center of the pipeline to ensure that the average fluid flow velocity is captured. Insertion too shallow or too deep can cause measurement errors and even damage to the sensor. 3. Specific operating specifications vary depending on the insertion depth of different models, and the installation manual provided by the manufacturer must be strictly followed. Cologne will provide specific insertion depth values, calculation formulas, or installation positioning templates for each model. Special tools should be used for accurate positioning during