13
TROUBLESHOOTING
1. The LEDs are the primary indicators of meter performance. Refer to the Operations
Section for LED indicating functionality.
2. Entrained air is air bubbles suspended in the water flow. Entrained air creates errors
in accuracy of ultrasonic technology meters. Recommend a maximum of 10%
entrained air in the water flow.
3. The faces of the transducers need to be clean and free of oily substances for
accurate operation. Do not touch transducers with fingers, oily rags, etc.
DO NOT
use wire brushes or abrasives to clean the faces of the transducers (see Figure
11).
4. Ensure the flow direction arrow is pointing in the direction of flow for correct LED
functionality.
Figure 11
