Dynasonics TFXM Series Ultrasonic Multi-Channel Flow Meter - Manual (Page 32)

Rev. 8/02
- 2.17 - TFXM
After selecting an optimal mounting location, Step 1, and suc-
cessfully determining the proper transducer spacing, Step 2, the
transducers can now be mounted onto the pipe.
The DTT transducers need to be properly oriented on the pipe
to provide optimum reliability and performance. On horizontal
pipes, the transducers should be mounted 180 radial degrees
from one another and at least 45 degrees from the top-dead-
center and bottom-dead-center of the pipe. See Figure 2.5.
Figure 2.5 does not apply to vertically oriented pipes.
Before the transducers are bonded to the pipe surface, two ar-
eas slightly larger than the flat surface of the transducer heads
must be cleaned of all rust, scale and moisture. Finish the sur-
face with some emery paper, and wipe the surface with a de-
greasing solvent such as trichlorethylene. Paint and other coat-
ings, if not flaked or bubbled, need not be removed. Plastic
pipes typically do not require surface preparation other than
soap and water cleaning.
PART 2 - TRANSDUCER POSITIONING
Figure 2.5 Transducer mounting locations on
horizontal pipe.
3. Transducer Mounting
Pipe
Preparation