910-269-EN, Rev. B, June 2011
Calibrating the EPOCH 1000 Series (Conventional UT Mode) 161
Figure 9-19 The IIW block with probe facing sensitivity hole
2. Move the probe backward and forward to maximize the amplitude of the echo
from the hole. Do not confuse the reference-reflector echo from the side of the
block.
Press [PEAK MEM] to help find the peak of the signal.
3. Once the echo amplitude is maximized, adjust the system sensitivity (gain) to
bring the reference-reflector signal to a predetermined reference line on the
screen. In this example, the echo is brought to 80
% of full-screen height.
4. Press [2
nd
F], [GAIN] (REF dB) to lock in the reference-gain level and add/subtract
scanning gain separately.
5. Use the 1/5 > Basic > Add, Scan dB, and Off parameters to make scanning gain
adjustments once the reference gain (Ref) is active. For more information on these
functions, please see section
4.3 on page 91.
Side-drilled
hole used
for
sensitivity
calibration
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