Olympus nortec 600 - Figure 5-23 the Sub-Surface Application

DMTA-10040-01EN, Rev. E, February 2018
Using the Instrument 137
Figure 5‑23 The Sub‑Surface application
To calibrate the signals
1. Press the MAIN FILTER menu key ( ) once, and then set the FREQ (A key) to
220 Hz.
2. Place the probe directly on the good fastener on the standard, and then press and
hold the A-LIFT NULL key ( ) to activate the automatic lift-off function. When
LIFT PROBE is displayed, lift the probe vertically (try to avoid tilting) and wait
for the message to disappear.
3. Repeat step 2 until you become familiar with the automatic lift-off function.
It may take some practice to obtain the proper timing with the automatic lift-off
function, but once mastered, this function will help you obtain a faster calibration.
4. Place the probe above the good fastener again, and then press the A-LIFT NULL
key ( ).
5. Lift the probe into the air, and then place the probe on the cracked fastener and
press the FREEZE key ( ).
The resulting signal is shown in Figure 5-24 on page 138.