dynasonics TFXL series - Transducer Mounting Configurations

Transducer Mounting Congurations
V-Mount and W-Mount Configurations
Apply the Couplant
For DTTR, DTTN and DTTH transducers, place a single bead of couplant, approximately 1/2 inch (12 mm) thick, on the flat
face of the transducer. See Figure 12. Generally, a silicone-based grease is used as an acoustic couplant, but any good quality
grease-like substance that is rated to not ow at the operating temperature of the pipe is acceptable. For pipe surface
temperature over 150° F (65° C), use Sonotemp® (P.N. D002-2011-011).
½ in.
(12 mm)
Figure 12: Application of couplant
Position and Secure the Transducer
1. Place the upstream transducer in position and secure with a mounting strap. Place the straps in the arched groove on the
end of the transducer. Use the screw provided to help hold the transducer onto the strap. Verify that the transducer is true
to the pipe and adjust as necessary. Tighten the transducer strap securely.
2. Place the downstream transducer on the pipe at the calculated transducer spacing. See Figure 13 on page 20. Apply rm
hand pressure. If signal strength is greater than ve, secure the transducer at this location. If the signal strength is not ve
or greater, using rm hand pressure slowly move the transducer both towards and away from the upstream transducer
while observing signal strength.
Signal strength can be displayed on the transmitter’s display or on the main data screen in the UltraLink software utility.
See "Parameter Configuration Using UltraLink Software" on page 29. Clamp the transducer at the position where the
highest signal strength is observed. The factory default signal strength setting is ve. However, there are many application-
specic conditions that may prevent the signal strength from attaining this level. Signal levels less than ve will probably
not be acceptable for reliable readings.
OTE:N Signal strength readings update only every few second. Move the transducer 1/8 inch then wait to see if the signal is
increasing or decreasing. Repeat until the highest level is achieved.
3. If, after adjusting the transducers, the signal strength does not rise to above ve, use an alternate transducer mounting
conguration. If the mounting conguration was W-Mount, re-congure the transmitter for V-Mount, move the
downstream transducer to the new spacing distance and repeat the procedure "Mount the Transducer" on page 19.
Transducer
Spacing
OTE:N Mounting the high temperature transducers is similar
to mounting the DTTR/DTTN transducers. High
temperature installations require acoustic couplant
that is rated not to flow at the operating temperature
of the pipe surface.
Figure 13: Transducer positioning
Transducer Installation
Page 20 April 2016TTM-UM-00369-EN-03