GE MFE DMS 2

4. Measuring Thickness
Page 96 DMS 2 Operating Manual
After the probe is uncoupled, the instrument will enter a time-
out period and the last reading (not necessarily the mini-
mum) is held in the display. During the time-out period
(which can be varied between 0 and 15 seconds), if the probe
is recoupled, the MINCAP session continues. After a probe
is uncoupled and the time-out period ends, the minimum
material thickness measured during that period will be
displayed in the thickness window. The A-scan associated
with this minimum captured thickness measurement will also
be displayed.
can be pressed at any time while you’re taking
minimum capture measurements. If
is pressed while
a probe is coupled or before time-out concludes the cycle,
the DMS 2 automatically recycles to a new MINCAP se-
quence. Pressing
stores and displays the minimum
thickness and A-scan and starts a new MINCAP cycle.
Activating the Minimum-Capture Mode (TEST–MINCAP)
Step 1: Activate the TEST Menu (if it’s not already activated)
by pressing
. Five selections will appear across the
bottom of the display screen.
Step 2: Press below the selection titled MINCAP. You’ll
note that the following choices are available:
• ON—Turns the Minimum-Capture Mode on. Note that the
Minimum-Capture icon will appear as “empty” as soon as
the probe is coupled. As long as the probe remains
coupled and the Minimum-Capture Mode is selected, the
icon will remain empty. When the probe is
uncoupled ,
the empty icon will “fill” (become black) as the
T-OUT period elapses. The icon will be completely black
when the T-OUT period is complete. When the duration
set by the T-OUT selection has elapsed, the
minimum
observed thickness, and its A-scan measured during that
time period will be displayed. The MINCAP icon is shown
in Figure 4-1.
• OFF—Disables the Minimum-Capture Mode and returns
the instrument to the standard measurement rate.
Step 3: The MINCAP feature is often beneficial in applica-
tions where a very localized minimum material condition
must be pinpointed.
Step 4: Once below MINCAP is pressed and ON is
selected, the MINCAP feature can only be turned off by
choosing OFF in the MINCAP selection.