Dynasonics TFXM Series Ultrasonic Multi-Channel Flow Meter - Manual (Page 38)

Rev. 8/02
- 2.23 - TFXM
PART 2 - TRANSDUCER POSITIONING
5. Secure with the thumb screw. Ensure that the screw rests in
the counter bore on the top of the transducer. (Excessive
pressure is not required. Apply just enough pressure so that
the couplant fills the gap between the pipe and transducer.)
If DOW 732 or some other silicone RTV type sealant was
used, ensure that no relative movement between the trans-
ducer and pipe takes place during the setting time and do
not apply instrument power for at least 24 hours. If Dow 44
or Dow 111 or an alternate form of grease has been used as
a couplant, setting time is not necessary.
6. Place the second transducer in between the mounting rails
near the dimension derived in the Transducer Spacing sec-
tion. Read the dimension on the mounting rail scale. Slide
the transducer clamp over the transducer and secure with
the thumb screw.
Figure 2.11 Transducer Space Measurement