Prosonic Clamp-on Ultrasonic Flowmeter Installation Overview
Prosonic clamp-on ultrasonic flowmeter uses a non-invasive measurement principle, requiring no pipe cutting or process shutdown during installation. Its installation quality directly affects measurement accuracy and signal stability, so it must be operated strictly according to specifications. This series of articles is divided into multiple parts. This article is Part 3: Multi-path (traverse) installation.
What Is Traverse Installation?
Traverse installation (also known as multi-path installation or reflective installation) refers to an installation method in which the ultrasonic signal undergoes multiple reflections inside the pipe and passes through the fluid multiple times, thereby extending the sound path and improving measurement sensitivity. Compared with single-path (direct) installation, traverse installation is more suitable for small pipe diameters or low flow velocity applications.
Typical Advantages of Traverse Installation
- Improved measurement accuracy: Longer sound path makes the time difference easier to distinguish.
- Suitable for small pipe diameters: Commonly used for DN15~DN100 pipes.
- Strong anti-interference capability: Multiple reflections can average the flow velocity distribution.
- No need to cut the pipe: Fully clamp-on, easy to install.
Applicable Scenarios and Limitations
- Suitable for homogeneous fluids and liquids without large amounts of bubbles or particles.
- Not suitable for pipes with severe internal scaling or loose linings.
- Requires sufficient straight pipe section (usually 10D upstream and 5D downstream).
Detailed Traverse Installation Steps
The following steps use the Prosonic clamp-on flowmeter as an example and are applicable to V-method (single reflection) or W-method (double reflection) installation.
- Determine the installation location: Select a straight pipe section and avoid disturbance sources such as valves, elbows, and pump outlets.
- Clean the pipe surface: Remove rust, paint, and oil to expose the metallic luster.
- Apply coupling agent: Evenly apply dedicated coupling agent to the sensor surface and pipe surface.
- Install the sensors: According to the calculated spacing, symmetrically fix the two sensors on both sides of the pipe.
- Adjust the angle: Ensure the sensor axis is parallel to the pipe axis, with deviation less than ±1°.
- Fix and seal: Use clamps or steel bands to fasten and prevent loosening.
- Connect the transmitter: Connect the signal cable according to the wiring diagram, paying attention to shielding layer grounding.
- Parameter setting and verification: Enter parameters such as pipe outer diameter, wall thickness, material, and fluid type, and observe signal strength and signal-to-noise ratio.
Traverse Installation Parameter Comparison
| Installation Method | Number of Sound Paths | Applicable Pipe Diameter | Signal Strength | Accuracy Impact |
|---|---|---|---|---|
| V-method (single reflection) | 2 times | DN50~DN600 | Medium | Standard |
| W-method (double reflection) | 4 times | DN15~DN100 | Stronger | Higher |
| Direct installation | 1 time | DN200 and above | Strong | Standard |
Installation Precautions and Common Issues
Key Precautions
- Coupling agent must be sufficient and free of bubbles, otherwise signal attenuation will be severe.
- Sensor spacing must be set precisely according to the transmitter calculation value; excessive error will cause measurement failure.
- Pipe parameters (outer diameter, wall thickness, material, lining) must be entered accurately.
- Avoid electromagnetic interference: Keep signal cables away from frequency converters and high-power motors.
Common Troubleshooting
- Weak signal: Check coupling agent, sensor spacing, and pipe inner wall condition.
- Fluctuating readings: Confirm whether the fluid is full-pipe, whether there are bubbles, and check whether grounding is good.
- No signal: Check wiring and parameter settings, and try changing the installation method (e.g., V-method to W-method).
Summary
Traverse installation of the Prosonic clamp-on ultrasonic flowmeter is an effective means to improve measurement accuracy for small pipe diameters and low flow velocities. Correctly selecting the installation method, accurately setting parameters, and standardizing operating steps are key to ensuring long-term stable operation. It is recommended that engineering technicians verify using signal strength and signal-to-noise ratio indicators after installation, and contact the manufacturer's technical support if necessary.