User`s manual

December 2003
9-4 Using the Ultrasonic Thickness Gage
Making Measurements (cont.)
3. Use the [←] [→] keys to view all the selections for pipe
material. Use the appropriate feature key to make a selection.
If your pipe material is not listed, choose the “OTHER” option
and enter the longitudinal sound speed of the pipe material.
Sound Speeds and Pipe Size Data contains a list of common
pipe materials and the corresponding longitudinal sound
speeds. If you know the length of the material you are
measuring, you can measure the sound speed with the
thickness gage as described on page 9-5.
Note: The TransPort may prompt you for additional information
depending on your selection. Use the appropriate feature
key to respond.
4. Apply couplant to the pipe at the spot where you will be
making the measurement. In general, the smoother the pipe
surface, the thinner the couplant should be applied. Rough
surfaces require a more viscous couplant such as a gel or a
grease. Special couplants are required for high temperature
applications.
5. Place the tip of the transducer on the pipe surface over the
couplant. Use moderate to firm pressure and keep the
transducer face as flat as possible. The line on the transducer
face should be positioned perpendicular to the pipe axis as
shown in Figure 9-3 below.
Figure 9-3: Proper Alignment of Thickness Transducer
on Cylindrical Surfaces
The TransPort displays thickness readings numerically. Use the
following section to view readings graphically.
Transducer