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.