PVX-B
Precision Visual Thickness Gauge
31
different inherent sound velocities. For example, the velocity of sound through steel
is about 0.233 inches per microsecond, versus that of aluminum, which is about
0.248 inches per microsecond. If the gauge is not set to the correct sound velocity,
all of the measurements the gauge makes will be erroneous by some fixed
percentage.
The
One Point
calibration is the simplest and most commonly used calibration
method - optimizing linearity over large ranges. The
Two Point
calibration allows for
greater accuracy over small ranges by calculating the probe zero and velocity. The
PVX-B
provides four simple methods for setting the sound-velocity outlined below:
Calibration to a known velocity
1) Press the
MENU
key once to activate the menu items tab. Press the
MENU
key multiple times to tab right, and the
ESC
key multiple times to tab left,
until the
CAL
menu is highlighted and displaying the submenu items.
2) Use the
UP
and
DOWN
arrow keys to scroll through the sub menu items
until
VELOCITY
is highlighted.
3) Press the
ENTER
key to display the
Digits Edit Box
.
4) Press the
UP
and
DOWN
arrow keys to scroll the highlighted value.
5) Press the
LEFT
and
RIGHT
arrow keys to scroll the digit locations.
6) Repeat steps
4 & 5
until the velocity number is correctly displayed.
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