Olympus nortec 600 - Page 363

DMTA-10040-01EN, Rev. E, February 2018
List of Figures 353
Figure 5-176 The null position after moving the support ring ........................................ 246
Figure 5-177 The tube scan result after moving the support ring (MIX) ........................ 247
Figure 5-178 The scan result with the support ring over the flaw in FREQ 1 ............... 247
Figure 5-179 Tube scan display with reference image (gray) and live signal (orange) 249
Figure 5-180 The FRQ2 DSP menu ....................................................................................... 250
Figure 5-181 The tube scan with the ALL-IN-1 display .................................................... 250
Figure 5-182 An example of an ECT absolute signal response ........................................ 251
Figure 5-183 The ECT Erosion and Corrosion application ............................................... 252
Figure 5-184 The scan of the two grooves ........................................................................... 253
Figure 5-185 Adjusting the signal phase ............................................................................. 253
Figure 5-186 Adjusting the gain ........................................................................................... 254
Figure 5-187 The 10 % ID and 20 % OD flaws set as a reference image ......................... 255
Figure 5-188 The tube scan result ......................................................................................... 255
Figure 5-189 An RFT probe ................................................................................................... 257
Figure 5-190 An example of an RFT differential signal response .................................... 257
Figure 5-191 A dual exciter probe ........................................................................................ 258
Figure 5-192 Equal response on both sides of a support with a dual exciter probe ..... 258
Figure 5-193 The RFT Pitting and Wear application ......................................................... 259
Figure 5-194 The scan of the thru-wall hole ....................................................................... 260
Figure 5-195 Adjusting the signal phase ............................................................................. 261
Figure 5-196 Adjusting the gain ........................................................................................... 261
Figure 5-197 A slow scan rate (optimal signal, left) and a fast scan rate (loss of signal,
right) ................................................................................................................... 262
Figure 5-198 The support ring’s signal clipped (left) and with adjusted gain (right) .... 263
Figure 5-199 The scan of the entire length of the tube ...................................................... 264
Figure 5-200 Angle adjustment in FREQ 2 ......................................................................... 264
Figure 5-201 GAIN adjustment in FREQ 2 ......................................................................... 265
Figure 5-202 Verification signal in FREQ 2 ......................................................................... 265
Figure 5-203 The MIX menu ................................................................................................. 266
Figure 5-204 The scan of entire tube length after AUTO MIX ......................................... 267
Figure 5-205 The signal after AUTO MIX (left); with angle/gain adjustment (right) .... 268
Figure 5-206 A scan with 10 Hz LO PASS filter (left); with scan rate too fast (right) .... 269
Figure 5-207 ALL-IN-1 display of cluster of 4 corrosion pits under support ring ........ 270
Figure 5-208 ALL-IN-1 display with support ring within 3.2 mm (0.125 in.) of 75 %
corrosion pit ...................................................................................................... 271
Figure 5-209 An example of an RFT absolute signal response ........................................ 271
Figure 5-210 A single exciter probe ..................................................................................... 272
Figure 5-211 A large defect detected on both sides of a support using the absolute (ABS)
channel .............................................................................................................. 272
Figure 5-212 The RFT Erosion and Corrosion application ............................................... 273
Figure 5-213 The scan of the two grooves ........................................................................... 274
Figure 5-214 Adjusting the signal phase ............................................................................. 274