GE DMS Go Operator's Manual page 63

2.3.2h Selecting a Rectification Mode (CONFIG-RECTIFY)
Rectification effects the orientation of the A-scan on the display screen. The A-scan represents the sound pulse (i.e., echo) that is returned to
the instrument from the material being tested. The series of echoes looks like the Radio Frequency (RF) signal shown in Figure 14 below.
Note that the RF signal has both a negative component below the axis and a positive component above the axis. In RF mode, Gate A and
Gate B can be positioned either above or below the axis, to be triggered by either a positive-heading echo or a negative-heading echo. The
rectification mode is normally automatically set up by the probe selection. Most GEIT thickness gauge probes are designed to be used in
negative rectification.
DMS Go Operator's Manual
Your Complete Source for
Testing Equipment. Since 1969!
Figure 14: Typical RF and Rectified Signals
www.BergEng.com
Berg Engineering & Sales Company, Inc.
Chapter 2. Instrument Setup
41
1-847-577-3980
Info@BergEng.com