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FU-TX 310 Clamp-on Ultrasonic Flowmeter Manual v2.
FU-TX 310 Clamp-on Ultrasonic Flowmeter Manual v2.
  • This instruction manual version is v2.1
  • 1. Product Introduction
    • 1.1 Specifications
    • 1.2 Important concepts
    • 1.3 Product features
    • 1.4 Product applications
    • 1.5 Measuring principle
    • 1.6 Product contents
    • 1.7 User interface
      • 1.7.1 Screen interfaces
      • 1.7.2 Buttons
      • 1.7.3 LED message
  • 2. Installation Method
    • 2.1 Power
    • 2.2 Ultrasonic probe
      • 2.2.1 Probe wiring
      • 2.2.2 Meter wiring
      • 2.2.3 Installation location
      • 2.2.4 Installation method
      • 2.2.5 ​Probe installation method
    • 2.3 Temperature sensor/Analog output
      • 2.3.1 Temperature sensor
      • 2.3.2 Analog output
      • 2.3.3 Wiring method
    • 2.4 Installation check
      • 2.4.1 RSSI (Signal Strength)
      • 2.4.2 Q value
      • 2.4.3 Flight time
  • 3. Output Interface
  • 4. Setting up the Interface
    • 4.1 Intial menu settings
    • 4.2 Units
    • 4.3 Meter (Measurement Settings)
    • 4.4 Communication
    • 4.5 Other
    • 4.6 Save
  • 5. Error Messages and Solutions
  • 6. Other Conditions
  • 7. MODBUS Communication Protocol
  • 8. Cautions
  • 9. Sound Speeds Data
  • LORRIC Integration and Application Center
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  1. 2. Installation Method
  2. 2.4 Installation check

2.4.2 Q value

The Q value represents the received signal quality and can be regarded as an indicator of signal-to-noise ratio (SNR). The value is displayed at the lower right of the display interface. The value ranges between 0 and 100%. Under normal conditions, the Q value should be > 60%. The higher the Q value, the better the signal quality, and the more reliable the measured value. A Q value of less than 10% will not be measured. Try the following solutions:

● Sometimes the RSSI value is high, but a low Q value may be displayed due to slight distance, angle, or other errors in the probe. If the Q value is low, try to adjust the distance and angle of the probe slightly.

● If the pipe surface is rough, smooth it and confirm that the probe can completely adhere to the pipe surface with no gaps.

● If the coating provided by the coupling agent isn’t smooth, recoat to provide a smooth surface.

● If the pipe surface has impurities, dirt, or grime, the probe should be moved to another location.

● If surrounding equipment causes electromagnetic interference, change the installation location or strengthen shielding.

● If the fluid flow field is unstable, change the installation location.

● If the pipe diameter is too large, set up the probe in the Z​ configuration.

Previous2.4.1 RSSI (Signal Strength)Next2.4.3 Flight time

Last updated 5 years ago