DeFelsko PosiTector 200 Manual De Instrucciones página 9

Layers
Advanced models of the PosiTector 200 are capable of
numerically displaying up to 3 individual layer thicknesses in a
multi-layer system.
Select the Layers menu option to:
- Choose up to 3 individual layer thickness values.
- Edit layer names and Batch Chart colors.
NOTES:
• Before setting up the Gage for multi-layer measurement, it
is recommended to first take measurements in single
layer mode and interpret the results using the Graphics
option.
• When a batch is Open, press the
Chart.
Graphics
When selected, the Gage displays
a graphical representation of the
ultrasonic pulse as it travels through
the coating system.
As the probe is depressed and the
ultrasonic pulse travels through the
coating system, the pulse encounters
changes in density at the interfaces
between coating layers and between
the coating and the substrate.
These interfaces are depicted by a "peak". The greater the
change in density, the higher the peak. The more gradual the
change in density, the greater the width of the peak. For
example, two coating layers made of essentially the same
material and "blended" would result in a low, wide peak. Two
materials of very different density and a well-defined interface
would result in a high, narrow peak.
The PosiTector 200 has the ability to measure the thickness
associated with either the highest peak(s) or the deepest
peak(s), depending on whether Max Thick Mode is enabled
(Advanced models only)
(Advanced
models only)
8
button to view the