Automatic Signalization Of Defects - NOVOTEST UD3701 Operation Manual

Parameters are to be measured by the flaw detector:
 Ta, Tb – Signal time value in А-gate (B-gate), µs.
 Ta-b – Difference between signal time value in А-gate and signal time value in B-gate.
 Aa, Ab – Signal amplitude value in А-gate (B-gate).
 Aa-b – Difference between signal amplitude values in А-gate and B-gate.
 Xba, Xbb – Entry point distance of signal in А-gate (В-gate).
 Xipa, Xipb – Input signal distance in А-gate (В-gate).
 Ya, Yb – Coordinate of signal depth in А-gate (В-gate).
 Ya-b – Difference between depths in А-gate and В-gate.
 Sa, Sb – Equivalent size of the signal in А-gate (В-gate).
 La, Lb – Distance to reflector along beam in А-gate (В-gate).
 La - Lb – Difference between distances to reflectors in A-gate and B-gate.
 dAa, dAb – Signal level value (dB) from A-gate (B-gate) to maximum signal.

2.4.7 Automatic signalization of defects

Automatic signalization of defects (or defect control - DTC) is used for automatic determination
and signalization of the defect.
To turn on and to set DTC user has to enter «DTC» parameters group.
In order to turn on/off «DTC» sound alarm when the signal crosses the gate level, user has, first of
all, to select the gate (A or B) in «Gates» parameter and then in «ALARM» parameter (Figure 2.37) set
«ON» or «OFF».
1. For setting the measurement mode in tested area «MEAS» parameter should be set. For
«MEAS» parameter there are two variants only: «PEAK» or «FLANK» (Figure 2.38). When
parameter is «PEAK» the peak signal within the gate is measured. When parameter is
«FLANK» the flank signal is measured.
а) measurement on the peak signal
Figure 2.36 – Displaying measurements (parameters)
Figure 2.37 – Turning on the DTC sound alarm
Ultrasonic Flaw Detector NOVOTEST UD3701
b) measurement on the flank signal
Operation manual
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