4. Measuring Thickness
Page 98
DMS 2 Operating Manual
Step 3: Press
below the selection titled FILE. Then,
continue to scroll through the list of stored data files until the
desired file is highlighted.
Step 4: The active file will be the one highlighted at the top
of the display.
4.2.2
Activating the Test Mode and Storing
Measurements
Step 1: With a probe connected and your DMS 2 powered
on, press
to activate the Test Mode.
Step 2: Apply liquid couplant to the material being tested,
and then carefully (but firmly) place the probe’s contact
surface onto the couplant-covered surface. Use the least
amount of couplant necessary to obtain quick, stable
thickness readings.
Step 3: Confirm that the probe is properly applied to the
material being tested by locating the probe-coupled icon
on your display screen (Figure 4-1). If it’s not displayed and
you feel the probe is solidly coupled, adjust the height of the
A-scan by pressing
below the GAIN selection.
NOTE:
Doubling is a condition that can occur when measur-
ing thicknesses below the intended thickness range of a
probe (or near the minimum thickness limit of a worn probe).
See the IMPORTANT NOTES at the beginning of this manual
for more information about doubling.
Step 4: With the desired file open, note that some of the file
locations are shown in the upper part of the display. Figure 4-
5 shows a typical Test mode display screen with thickness
measurement data shown in the NAV Window. Note that
within the NAV Window, the selected (also known as active)
data file location is highlighted with a thicker line. This
highlighted location is where the current thickness measure-
ment reading will be sent.
Step 5: To select a different active location, you must first
enter the FILE NAVIGATION Mode by pressing
(this is
the display shown in Figure 4-5). Now press the indicated
or
to move within the data file. When you’ve
selected the desired active data location, simply press
to return to the Test Mode.
