Visual Inspection; Functionality Test; Determination Of The Modal Accuracy When Measuring Echo-Signal Amplitudes From Defects - NOVOTEST UD3701 Operation Manual

3.2.3 Visual inspection

Visual inspection is necessary to check:
 completeness of equipment according to OM;
 no mechanical damages to the flaw detector and its parts: probes, connectors and
connecting cables;
 no foreign particles inside the device user could found when tilts it;
 marking to identify type and serial number of the flaw detector.

3.2.4 Functionality test

Before connecting the flaw detector to AC mains supply, it is necessary to connect external mains
adapter to the socket on bottom part of the device. Plug in the mains adapter.
For functionality test of the device do the following:
1. Turn on flaw detector by power-on key on the front panel. Main menu appears on the screen
(settings of parameters and modes are according to the last device operation).
2. Test the keyboard functionality: navigation keys, parameter changing, direct gain control,
mode selection. Check the possibility of coarse and precise parameter setting.
3. Check the possibility to change by flaw detector following parameters: measurement range,
US velocity, scanning delay, beginning, duration and level of the gate, selection of monitoring
pulse mode.
4. Enter parameter group «Probe» and set the parameter «DUAL – OFF» (single-element
probe).
5. Connect single-element probe P111-2,5-К12 to generator output (left socket) on the upper
panel of flaw detector.
6. Set in parameter groups of the device following parameter values:
 velocity of UT propagation 6063 m/s («VEL – 6063 m/s»);
 measurement range 100 mm («RANGE – 100 mm»);
 probe frequency 2,5 MHz («FREQ – 2,5 MHz»);
 generator voltage probe pulse – U3 (parameter group «Tract» parameter «Energy – U3»);
 level of the gate – 50 % (parameter group «Gates» parameter «Level – 50%»);
 method of echo-signal measurement – by peak («MEAS – PEAK»).
7. Put couplant on MD4-0-6 with height H = 20 mm and set the probe on MD4-0-6 surface with
no defects. Get view of five echo-signals by changing gain with 1,0 dB step. They should be
located on marks of scanning: 2, 4, 6, 8 and 10 marks.
8. Check functionality of all the device tabs by keyboard.
Detector is passed inspection, if all operations of functionality are tested successfully.
3.2.5 Determination of the modal accuracy when measuring echo-signal amplitudes from
defects
For determination of the modal accuracy when measuring echo-signal amplitudes from defects it
is necessary:
1. Make a connection diagram shown in Figure 3.2, where R = 51 Оhm (C2-10-0,25-51 Оhm
± 0,5%).
Flaw detector
(
Figure 3.2 – Connection diagram of flaw detector for determination of the modal accuracy when
Attenuator of
UT tester
R
measuring echo-signal amplitudes from defects
Ultrasonic Flaw Detector NOVOTEST UD3701
Generator
(
(
Operation manual
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