DMTA-10004-01EN, Rev. D, November 2016
Using Special Functions
117
The minimum and maximum thickness modes respectively display the smallest and
largest thickness measured value from the time you activate the minimum mode or
from the time you reset it. The modes are useful when it is important to determine the
thinnest/thickest reading obtained while making a series of readings on a test piece.
To activate the minimum, maximum, or min/max mode
1.
From the measurement screen, press
[SETUP MENU]
.
2.
In the menu, select
MEAS
.
3.
In the
MEAS
screen, set
MIN/MAX
to the desired mode (
OFF
,
MIN
,
MAX
, or
BOTH
).
4.
Press
[MEAS]
to return to the measurement screen.
5.
In the measurement screen, press
[MEAS]
again to reset the held minimum,
maximum, or min/max values.
The thickness display will blank indicating that the old
MIN/MAX
value is reset.
Saving or sending a
MIN/MAX
reading also resets the value.
8.3
Preventing False Minimum/Maximum Thickness Readings
A false minimum or maximum reading can occur when you lift the transducer from
the test piece. This is due to excess couplant, particularly on smooth surfaces, which
causes the instrument to read the thickness of a couplant drop when you lift the
transducer.
To prevent false minimum/maximum thickness readings
1.
Activate the minimum or maximum thickness mode (see “Using the Minimum,
Maximum, or Min/Max Thickness Mode” on page 115).
2.
Before uncoupling the transducer, press
[FREEZE]
to freeze the waveform.
3.
Once the transducer is uncoupled, press
[FREEZE]
again to unfreeze the display
and recall the minimum thickness and waveform.
8.4
Using Alarms
You can activate one of the 38DL PLUS alarm modes to help you identify when the
actual thickness measurement is above or below editable reference values.
When an alarm condition occurs, the 38DL PLUS warns you as follows:
Summary of Contents for 38DL PLUS
Page 9: ...DMTA 10004 01EN Rev D November 2016 Table of Contents ix Index 297 ...
Page 10: ...DMTA 10004 01EN Rev D November 2016 Table of Contents x ...
Page 28: ...DMTA 10004 01EN Rev D November 2016 Important Information Please Read Before Use 16 ...
Page 30: ...DMTA 10004 01EN Rev D November 2016 Introduction 18 ...
Page 50: ...DMTA 10004 01EN Rev D November 2016 Chapter 2 38 ...
Page 60: ...DMTA 10004 01EN Rev D November 2016 Chapter 3 48 ...
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Page 300: ...DMTA 10004 01EN Rev D November 2016 Appendix C 288 ...
Page 306: ...DMTA 10004 01EN Rev D November 2016 List of Figures 294 ...
