Makita DWD181 Instruction Manual page 50

Operation
5. Scan results are shown on the
display.
Buried iron bars and voids each appear
in waveforms as shown at right.
Estimate the locations of iron bars
through the characteristics and
positions of the waveforms.
Iron bar:
Waveforms appear in deeper
positions from the scan surface.
Block void:
Waveforms appear in shallower
positions from the scan surface.
1
1. Iron bar
2. Block void
Characteristically shown iron
bar graphics
Characteristically shown block
void graphics
50
2