DMTA-10055-01EN, Rev. A, February 2015
Calibration
177
4.
Use the G1Start button (P5 key) to position gate 1 so that the reflection from the
first side-drilled hole is exceeding the gate threshold. This reflection should be
close to 12.5 mm (0.5 in.) (see Figure 9-26 on page 177).
Figure 9-26 Example of a gated signal for zero calibration
5.
Press dB, and then adjust the gain so that the echo amplitude is at approximately
80 %.
The AUTO XX% feature can be used to automatically adjust the gain to set the gated
echo amplitude to XX% of full screen height (the default XX value is 80 %). To activate
this feature, press 2
ND
F, (AUTO XX%).
A thickness measurement reading appears in large text above the A-scan.
6.
Once a steady reading is achieved, choose
Auto Cal > Cal-Zero
.
The screen freezes and the
Cal-Zero
box appears (see Figure 9-27 on page 178).
Thickness measurement
Содержание EPOCH 650
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Страница 30: ...DMTA 10055 01EN Rev A February 2015 Introduction 18...
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