Additional Modes - NOVOTEST UD3701 Operation Manual

Operation manual
Ultrasonic Flaw Detector NOVOTEST UD3701
5. Turn on DGS mode by selection «ON» in «DGS» parameter.
6. Turn on the automatic DGS curve plotting by selection «ON» in «AUTO » parameter. The
device automatically determines reference signal amplitude. Also, reference signal amplitude
user can input manually via «А Level» parameter (Figure 2.61).
Figure 2.61 – DGS curve plotting - «AUTO» parameter is turned on
When using DGS mode, two additional curves could be made – rejection (sorting out) and control.
To add the curves user has to open «FLAW» and «CONTR» parameters and to input the reflector size
for rejection and for required control.

2.4.11 Additional modes

2.4.11.1 Envelope mode
In some cases, it is necessary to determine the signal maximum and get envelope curve when
scanning one or another reflector (Figure 2.62). To turn on envelope mode user has to select parameter
«ENVEL» in «Func» parameter group and set «ON».
Figure 2.62 – Envelope mode is turned on - parameter «ENVEL»
2.4.11.2 Measurement mode with signal averaging
In some case, when testing materials with high damping or large-sized objects, or when operating
with long scanning time, noise amplitude could be equal to the valid signal amplitude. And due to high
noise, it becomes difficult to identify the valid signal.
For these cases measurement mode with signal averaging is used over 2, 4, 8 and 16 signals. To
turn on averaging mode user has to activate parameter «AVG» in parameter group «Func» by setting
required quantity of signals for averaging (Figure 2.63).
Caution!
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