Transducer
Spacing
OTE:N Mounting the high temperature transducers is similar
to mounting the DTTR/DTTN/DTTL transducers. High
temperature installations require acoustic couplant
that is rated not to flow at the operating temperature
of the pipe surface.
OTE:N Use the DTTL on pipes 24 inches and larger and not
on pipes smaller than 4 inches. You can consider
using the DTTL transducers on pipes smaller than
24 inches if there are less quantifiable aspects—such
as sludge, tuberculation, scale, rubber liners, plastic
liners, thick mortar liners, gas bubbles, suspended
solids, emulsions—and smaller pipes that are
perhaps partially buried where a V-Mount is required
or desired.
Figure 12: Transducer positioning
DTTS/DTTC Small Pipe Transducer Installation
The small pipe transducers are designed for specific pipe outside diameters. Do not attempt to mount a DTTS/DTTC
transducer onto a pipe that is either too large or too small for the transducer. Instead, contact the manufacturer to arrange for
a replacement transducer that is the correct size.
1. Apply a thin coating of acoustic coupling grease to both halves of the transducer housing where the housing will contact
the pipe. See Figure 14.
2. On horizontal pipes, mount the transducer in an orientation so the cable exits at ±45 degrees from the side of the pipe.
Do not mount with the cable exiting on either the top or bottom of the pipe. On vertical pipes, the orientation does not
matter.
3. Tighten the wing nuts or U-bolts so the acoustic coupling grease begins to ow out from the edges of the transducer or
from the gap between the transducer halves.
MPORTANTI
Do not overtighten. Overtightening will not improve performance and may damage the transducer.
4. If signal strength is less than ve, remount the transducer at another location on the piping system.
1/16 in. (1.5 mm)
Acoustic Couplant
Grease
Figure 13: Application of acoustic couplant — DTTS/DTTC transducers
OTE:N If a DTTS/DTTC small pipe transducer was purchased separately from the transmitter, the following configuration
procedure is required.
Transducer Installation
Page 21 May 2016 TTM-UM-00136-EN-06
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