Product Details

Flow meter sensors are measuring instruments for flow meters, with many advantages and a wide range of applications. However, there may also be some malfunctions in the use of the Ferris flowmeter sensor. Below is a detailed analysis of the fault phenomena of the sensor in the Figris flowmeter.

1、 Fault phenomenon of diesel TDS ultrasonic flowmeter: unstable reading with drastic changes

Cause analysis: The pipeline installed with ultrasonic flow sensors may experience significant vibration or the presence of flow changing devices (such as flow meters installed downstream of regulating valves, pumps, and contraction holes)

Solution: Install the flow sensor away from the vibration source or move it upstream of the flow regime changing device

2、 Fault phenomenon of diesel TDS ultrasonic flowmeter: inaccurate reading and large error

Root cause analysis:

1. The flow meter sensor is installed at the top and bottom of the horizontal pipeline, and the sediment interferes with the ultrasonic signal. Solution: Install sensors on both sides of the pipeline.

2. The flowmeter sensor is installed on the pipeline where the water flows downwards, and the pipeline is not filled with fluid. Solution: Install the sensor on a pipe section filled with fluid.

3. There are devices that cause strong fluctuations in the flow state, such as Venturi tubes, orifice plates, vortex streets, turbines, or partially closed valves, which are precisely within the range of sensor transmission and reception, resulting in inaccurate readings. Solution: Install the sensor away from the above device, with an upstream distance of 30D and a downstream distance of 10D from the above device, or move it upstream of the above device.

4. The input diameter of the flowmeter does not match the inner diameter of the pipeline. Solution: Modify the pipe diameter to match.

3、 Fault phenomenon of diesel TDS ultrasonic flowmeter: The sensor is good, but the flow rate is low or there is no flow rate

Root cause analysis:

1. Due to the incomplete removal of paint and rust outside the pipeline. Solution: Clean the pipeline again and install the sensor.

2. The pipeline surface is uneven or the flow meter is installed at the welding joint. Solution: Grind the pipeline flat or keep it away from the weld seam.

3. The roundness of the pipeline is poor, the inner surface is not smooth, and there is pipe lining scaling. If the pipe material is cast iron, this situation may occur. Solution: Choose smooth inner surface pipe materials such as steel pipes or lining areas.

4. The tested medium is either a pure substance or a solid suspension that is too low. Solution: Choose other suitable types of instruments.

5. The sensor is installed on the fiberglass pipeline. Solution: Remove the glass fiber.

6. If the sensor is installed on the casing, it will weaken the ultrasonic signal. Solution: Move the sensor to the pipe section without casing.

7. The sensor is not well coupled with the pipeline, and there are gaps or bubbles on the coupling surface. Solution: Reinstall the coupling agent.

4、 Fault phenomenon of diesel TDS ultrasonic flowmeter: When the control valve is partially closed or the flow rate is reduced, the reading will increase

Reason analysis: 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 increases due to the reduction in diameter of the control valve, resulting in an increase in flow rate.

Solution: Move the sensor away from the control valve, with a distance of 30D upstream from the control valve or 5D upstream from the control valve.

5、 Fault phenomenon of diesel TDS ultrasonic flowmeter: The flowmeter is working normally, but suddenly it no longer measures the flow rate

Root cause analysis:

1. The tested medium undergoes a change. Solution: Change the measurement method.

2. The tested medium vaporizes due to high temperature. Solution: Cooling down

3. The temperature of the measured medium exceeds the limit temperature of the sensor. Solution: Cooling down

4. The coupling agent under the sensor has aged or been consumed. Solution: Apply coupling agent again

5. Due to high-frequency interference, the instrument exceeded its own filtering value. Solution: Stay away from interference sources

6. Data loss within the computer. Solution: Re enter all correct parameters

7. The computer crashed. Solution: Restart the computer