3.2.5
Real time manual deduction processing
Waves reflected by objects to be probed (e.g., reinforcing steel) at a position near the concrete
surface are difficult to identify because they are combined with waves reflected by the concrete
surface (called surface waves). This radar contains the standard surface wave data (fixed surface
wave data) with which it eliminates the influence of the concrete surface waves in real time, thereby
making it easy to identify the waves reflected by the objects to be probed.
However, with the condition of the concrete surface and moisture content in the concrete and for
special concrete, the effect of the reflected wave from the surface of the concrete may not be fully
removed even if auto surface wave processing for standard surface waves is performed and there
may be lateral stripe reflected waves near the surface.
In this type of situation switch to real time surface wave processing based on surface waves in the
scanning data to remove lateral stripe reflected waves.
Perform manual deduction processing as explained below.
a) Place
the 14
V
on the side of the unit over the start line and the forward/backward 14
V
over the scan test line.
b) Press 9
START
. After about one second, a short single buzzer sound is generated, the
fixed cursor is displayed at a position of about 10cm of the movement distance scale on the
B mode screen, and then scan test preparation is complete.
c) Move the unit on top of the scan test line at a speed of less than 40 cm/s by rotating the
wheels. If speed exceeds 40 cm/s, a buzzer sounds and the data for that timeframe is
invalid. Please perform the scan test again.
d)
When results for objects that are not being probed overlap with the fixed cursor position,
push 5
Enter
. (See Figure 3-9.)
The reflected wave that the fixed cursor is pointing to can be processed into a surface
wave by real time manual deduction. The resulting data of this processing is indicated in “A”
mode or “BA” mode.
A “
↓
” is shown at the position that the real time manual deduction processing was
performed on the movement distance guide. In the “Processing” area at the bottom right of
the screen, <<Manual>> is displayed.
e) Press
9
START
again to finish. A double buzzer sound is generated and the scan test is
stopped.
However, if the scan distance reaches 15m, the buzzer sounds twice and the scan test
automatically finishes.
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Summary of Contents for Handy Search NJJ-95B
Page 1: ...Handy Search Instruction Manual...
Page 8: ...Appearance of the NJJ 95B vii...
Page 21: ...Rear view Units in trigonometry mm 9...
Page 24: ...8 14 15 Figure 2 2 Side View 16 17 14 18 Figure 2 3 Rear View 12...
Page 73: ...Display of thumbnails Figure 3 17 CF Control Screen 61...
Page 83: ...B Terminals ACharge confirmation mark Figure 3 22 Battery Pack 71...
Page 85: ...Shutter Charge lamp Figure 3 23 Battery Charger 73...
Page 96: ...Concrete Rebar D 75mm L 75mm D 75mm Difficult to implement 84...
Page 103: ...Dimensions Weight About 149 W x 147 H x 216 D mm Approximately 1 1kg 91...
