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7 MEASUREMENT - TAKING READINGS
Disclaimer
Inherent in ultrasonic thickness measurement is the possibility that the instrument will use the second echo
rather than the first echo from the back surface of the material being measured while in standard pulse-echo
mode. This may result in a thickness reading which is TWICE what it should be.
In addition, measurements through very thick paint or coatings while using echo-echo mode may result in
the paint or coating being measured rather than the material intended. The responsibility for proper use of
the instrument and recognition of these types of phenomenon rests solely with the user of the instrument.
7.1 Before you start
• Set the zero point of the gauge.
See “Setting up the gauge” on page 15.
• Calibrate the gauge.
See “Calibration” on page 17.
• Select the correct measurement mode.
See “Measurement options” on page 23.
• Prepare the surface.
See “Condition and preparation of surfaces” on page 43.
CG60_CG60DL_TMA_0498_00_01_23225_A6L.fm Page 21 Tuesday, November 22, 2011 12:19 PM
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