DMTA-10004-01EN, Rev. D, November 2016
Using Advanced Gaging Features
135
10. Using Advanced Gaging Features
The 38DL PLUS has many advanced thickness measurement features that assist in
making the gage a more versatile instrument. This chapter describes how to use these
advanced features.
10.1 Adjusting the Gain with Dual Element and E110 EMAT
Transducers
By default, the 38DL PLUS automatically sets the gain to an optimum value to obtain
the most accurate measurement. This works well for most corrosion measurement
applications.
In special circumstances, you may need to manually adjust the gain to get a correct
thickness measurement. For example, in high temperature measurements, increasing
the gain is generally recommended.
Olympus recommends to manually adjust the gain only when you are an experienced
operator who can analyze and understand the waveform display.
With D79X series dual element and E110 EMAT transducers, you can manually adjust
the gain by pressing [GAIN]. The gain value, expressed in decibels (dB), appears near
the lower-right corner of the display (see Figure 10-1 on page 136).
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