DMTA-20073-01EN, Rev. C, November 2015
Performing an Inspection
65
indicates the direction from the first to last element on the probe, meaning that the
first element is on the right-hand side of the RollerFORM, and the last element on the
left-hand side (see Figure 5-2 on page 65).
Figure 5-2 Arrow on the probe-axle indicating the direction from first to last
element on the probe
When the acoustic wheel’s tire is kept filled with water for a long period of time,
opaque spots may form, or the tire may even become entirely opaque. Even though it
does not affect the ultrasound signal, a partially or completely opaque tire makes air
bubble detection and removal difficult or impossible. Opacification of the tire surface
does not occur when glycol is used to fill the liquid chamber. The tire’s transparency
can be easily restored. For more information, see “Preserving or Restoring the Tire’s
Transparency” on page 90.
To perform an inspection
1. Using the manual pump provided with the RollerFORM, apply a mist of water to
the surface to inspect and to the acoustic wheel.
For more information, see “Manual Pump” on page 23.
2. Roll the RollerFORM back and forth a few times to uniformly wet the acoustic
wheel.
Arrow indicating direction of first probe
element relative to last element
Probe-cable side Retaining C-clip side
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