Setting Thickness Alarms - GE MFE DMS 2 Operating Manual

5. Working with Stored Data
5.4

Setting Thickness Alarms

The DMS 2 contains several thickness limit and alarm
features. As described in Section 3.3.2 of this manual, a
minimum and/or maximum thickness limit can be set from
the TG Mode. A visual and sometimes audible alarm will
indicate when a thickness measurement violates one of
these limits.
The minimum and maximum thickness alarms may also be
set from the DR Mode. These values are shared by both the
TG or DR Modes. In addition to the conventional thickness
limits, the use of the companion UltraMATE® or UltraPIPE®
software programs allow another type of limit to be imposed.
Using UltraMATE®, a data file already filled with previously-
recorded thickness measurements can be used to collect
new thickness readings. In this case the new measurement
is automatically compared to the previously recorded one in
the same data file location. The DMS 2 will calculate the
loss or gain of material thickness between the old and new
data point. The DMS 2 will identify when the percentage
thickness loss (% LOSS) or growth (%GROWTH) exceeds
a user defined limit. Similarly, limits can be set for absolute
loss (ABS. LOSS) and absolute growth (ABS. GROWTH).
All of these limits are set in the HEADER Submenu by using
the following procedure:
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Step 1: Open the Data Recorder by pushing
DR Menu (Figure 5-2) is opened, you'll note five submenus
listed on the Submenu Bar.
Step 2: Make sure the data file for which you wish to specify
limits is active.
Step 3: Activate the HEADER Submenu by selecting it with
or so that it's highlighted. Several selections will
appear, including ITEM.
Step 4: Press
below the selection titled ITEM. You'll note
that several notation lines are listed including some of the
following: T-MIN, T-MAX, ABS. LOSS, % LOSS, ABS.
GROWTH, and % GROWTH. Each of these limits can be
adjusted from this display screen.
Step 5: Select the item you wish to adjust. For instance, if
you wish to set the value for T-MIN to 1.500 inches, you must
first press below the ITEM selection until T-MIN is high-
lighted.
. Once the
DMS 2 Operating Manual