Table 9 Alarm Calculation Example With The % Diff Mode - Olympus 38DL PLUS User Manual

DMTA-10004-01EN, Rev. D, November 2016
— When the thickness differential is greater than the % GROWTH value, a high
alarm is indicated.
Table 9 on page 120 shows the result for an example where both % LOSS is set to
20 % and % GROWTH is set to 5 %.

Table 9 Alarm calculation example with the % DIFF mode

Previous Actual
values thickness
7.62 mm 6.07 mm
(0.300 in.) (0.239 in.)
7.62 mm 8.03 mm
(0.300 in.) (0.316 in.)
7.62 mm 7.24 mm
(0.300 in.) (0.285 in.)
7.62 mm 7.67 mm
(0.300 in.) (0.302 in.)
B‑SCAN
The B-scan alarm mode is similar to the standard alarm mode except that in the
B-scan alarm mode, lines are shown in the B-scan grid when the reference values
fall within the B-scan thickness range (see Figure 8-5 on page 121). In addition, the
alarms are operational as you review B-scan thicknesses in B-scan freeze review
mode.
120 Chapter 8
Low alarm High alarm
Yes No
No Yes
No No
No No
Calculations
7.62 6.07 –
-------------------------- - × >
100 20%
7.62
or in inches:
0.300 0.239 –
-------------------------------- - × >
100 20%
0.300
8.03 7.62 –
-------------------------- - × >
100 5%
7.62
or in inches:
0.316 0.300 –
-------------------------------- - × >
100
0.300
7.62 7.24 –
-------------------------- -
× <
100 20%
7.62
or in inches:
0.300 0.285 –
-------------------------------- - × <
100 20%
0.300
7.67 7.62 –
-------------------------- - × <
100 5%
7.62
or in inches:
0.302 0.300 –
-------------------------------- - × <
100 5%
0.300
5%