4. Measuring Thickness
Page 126 DMS 2 Operating Manual
Use the following procedure to select a rectification option.
Negative rectification is the default option and will satisfy most
applications and operators.
Step 1:
If necessary, activate the TG Primary Menu (TG
mode) by pressing
.
Step 2:
Press simultaneously to activate the TG
Secondary Menu (Figure 3-3).
Step 3:
Activate the SETUP Submenu by selecting it with
or so that it’s highlighted. Five selections will appear
across the bottom of the display screen.
Step 4:
Press below the selection titled RECTIF. You’ll
note that the following four options are available:
• NEG—Used for most applications; default for most dual-
element probes (shows the negative component of the RF
signal but displays it in a positive orientation). The
icon will appear at the top of the display screen.
• POS—Default for most single-element probes. The
icon will appear at the top of the display screen.
• FULL—Shows the positive and negative halves of the RF
wave, but both are oriented in the positive direction. The
icon will appear at the top of the display screen.
•RF—Used for special applications where it’s beneficial to
have the entire wave displayed (with no rectification). The
icon will appear at the top of the display screen.
Step 5:
The rectification method will be set to the configuration
last chosen.
4.5 Working with B-scan Thickness Mapping
B-scan thickness mapping allows the user to measure the
thickness of a section of material, for a period of up to 21
seconds, and display a graphical cross-section of the mea-
sured thickness. Figure 4-16 shows a typical B-scan display
over a period of 21 seconds (shown on the horizontal axis).
See Figure 4-16 for a description of the various B-scan
operating features. Then, use the following procedures to
configure the DMS 2 to operate in B-scan mode.
NOTE: For the DMS 2 only, and only functions in the SIP,
Dual, T-COAT, and AUTO-V measurement modes. (Refer to
Section 3.3.1 to change modes.)
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