Application Cautions for Ultrasonic Flow Meters
|
Ultrasonic Flow Meters Application Cautions for Ultrasonic Flow Meters The velocity of the solid particles in slurry can be different than its liquid carrier fluid. Be careful applying ultrasonic technology when the solid particles can become concentrated in one part of the flowing stream, such as in a horizontal pipe flowing at a relatively low velocity. Be careful when applying Doppler ultrasonic flow meters in slurry applications because the solid particles can produce strong signals that can cause the Doppler flow meter to measure the velocity of the solids and not the velocity of the liquid. Avoid fluids that can coat wetted transducers or coat the pipe wall in front of non-wetted transducers, because the flow meter will not measure when the ultrasonic waves cannot enter the flow stream. Be sure to maintain reliable clamp-on transducer connections to the pipe wall, because the flow meter will not measure when the ultrasonic waves are not able to reach the fluid. Be sure to understand the process and apply these flow meters properly. For example, a periodic cleaning process upstream may cause the flow meter to stop working because the dirt may not allow ultrasonic energy to pass through the fluid. Further, if the dirt coats wetted transducers, the flow meter may fail to operate until it is cleaned. |
Previous:How to Use Ultrasonic Flow Meters next:Ultrasonic Flow Meters