Dgs" Mode - NOVOTEST UD3701 Operation Manual

2.4.10 «DGS» mode
DGS curve describes amplitudes dependence on calibration reflector with different depths in
material. For correct DGS setting should be input the right size of piezo-electric crystal plate of the
probe in «Probe» parameters group (see p. 2.4.4).
Further DGS settings are made in «DGS» parameters group.
Settings are made on the standard sample (SS) with known equivalent area of reflector.
For setting it is necessary:
1. Put the probe on SS and find the maximum signal from the reflector with known equivalent
size;
2. Input the size value of reference reflector to parameter «REF» (in mm
Figure 2.58 – Setting the equivalent reflector size - «REF» parameter
3. Get the reflected echo-signal from the equivalent reflector and overlap A-gate on it (Fig. 2.59).
Figure 2.59 – Overlapping the gate on the reflected signal
4. Turn on the envelope curve mode and find the maximum reflector amplitude (Figure 2.60).
Figure 2.60 – Turning on the envelope curve mode
Ultrasonic Flaw Detector NOVOTEST UD3701
Operation manual
2
), Figure 2.58.
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