JRC NJJ-105 Handy Search User manual

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Handy Search
Users Guide

i
Preface
Thank you very much for purchasing this JRC NJJ-105 Handy Search (hereafter
called this product).
The NJJ-105 Handy Search nondestructively locates, detects, and displays the
depths and positions of reinforcing steel bars in reinforced concrete structures.
●Before starting to use the NJJ-105 Handy Search, read through this instruction
manual carefully to learn correct operations and ensure correct and trouble-free
operations.
●Keep the instruction manual handy for reference. Refer to the manual when
facing unknown things or when experiencing troubles during operation.
DC50-NJJ-105
First edition January 2011

ii
Before Operation
Pictorial Indication
Various icons are indicated in this manual and are labeled on this
product to ensure your safe and correct operations and to prevent any
danger to you and/or other persons and any damage to your property
during operation. Such indications and their meanings are as follows.
Please understand them before reading this manual.
Examples of Pictorial Indication
●JRC assumes no liability for any damage (such as damage caused
to reinforcing steel bars, electrical pipes, gas pipes, etc.) arising
from scan results using this product.
●JRC assumes no liability for any damage arising from the
disappearance of scan results stored in CF memory.
* Windows is a registered trademark or a trademark of Microsoft Corporation in
United State and other countries.
*CompactFlash (CF) is a registered trademark or SanDisk Corporation.
WARNING
This indication is shown where any person is supposed to
be in danger of being killed or seriously injured if this
indication is neglected and this product is not operated
correctly.
CAUTION
This indication is shown where any person is supposed to
be injured or any property is supposed to be damaged if
this indication is neglected and this product is not
operated correctly.
Electric
shock
A △mark indicates CAUTION (including DANGER and
WARNING). Detailed content of the specific CAUTION
(“Electric Shock” in the example on the left.) is shown in
the mark.
Disassembling
Prohibited
Prohibition
A mark indicates prohibition. Detailed content of the
prohibited action (“Disassembling Prohibited” in the
example on the left.) is shown in the mark.
Disconnect the
power plug
Instruction
A ●mark indicates instruction. Detailed content of the
instruction (“Disconnect the power plug” in the example on
the left.) is shown in the mark.

iii
Precautions for Use
WARNING
Do not use any battery pack other than the recommended battery packs.
Doing so may cause fire, electric shock, or breakdown.
Do not short-circuit the terminals of the battery charger or battery pack. Doing
so may cause fire, explosion, or breakdown.
Do not insert metallic or flammable objects into the CF memory slot. Doing so
may cause injury, fire, electric shock, or breakdown.
Do not disassemble, modify, heat, or place battery pack in fire. Doing so
may cause fire, explosion, or breakdown.
Do not use any charger other than the recommended battery charger to
charge the battery pack. Doing so may cause fire, electric shock, or
breakdown.
Do not disassemble, modify, or repair this product by yourself. Doing so may
cause fire, electric shock, or breakdown.
If the power cord is damaged (exposure of the core wire, open circuit failure,
or break in the sheath), contact our nearest branch office (See Section 9),
sales outlet, or service station for a replacement power cord. Use of a
damaged power cord may cause fire or electric shock.
Do not connect/disconnect the power plug by wet hands. Doing so could
cause an electric shock.
Do not use (place) this product in a location where it is exposed to flammable
or corrosive gas. Doing so could cause fire, personal injury, or breakdown.
This product has a waterproof construction but must not be dipped in water.
Do not expose this product to water or moisture, and do not use it in rainy
weather. Doing so could cause an electric shock or breakdown.
Stop using this product immediately when a sign of malfunctioning is
detected, and follow only the detailed procedure in this instruction manual. If
it cannot be restored to normal operation, contact our nearest branch office
(See Section 9), sales outlet, or service station. Use of this product in an
abnormal state could cause fire or breakdown.
Should this product emit an abnormal sound, odor, or smoke, immediately
turn off the power switch, remove the battery pack, disconnect the power
plug from the socket outlet, and contact our nearest branch office (See
Section 9), sales outlet, or service station. Use of this product in an abnormal
state could cause fire, electric shock, or breakdown.
Before disposing of the used lithium ion battery, insulate the charging
terminals by taping or the like. Otherwise, the battery could cause fire or
explosion if short-circuited.

iv
CAUTION
Judge the scan result with considering the depth sensing capability of this
product. Since the depth sensing capability of this product is subject to the
conditions of the object of investigation, judging the scan result with no
consideration of the depth sensing capability may cause the cutting of rebar.
Put your hand through the hand strap and hold this product. Dropping of this
product may cause an accident such as a device breakdown or personal
injury.
When disconnecting the power cord, hold the plug. Pulling the power cord by
itself may cause cord damage, fire, or electric shock.
Do not place this product on an unstable place such as a wobbly table or
sloping surface. Doing so may cause a personal injury or breakdown when it
drops or falls.
Do not use (place) this product in a humid or dusty location, or a location
where water, oil, or chemical may splash onto this product. Doing so may
cause fire, electric shock, or breakdown.
Do not use (place) this product in a location where it is subject to vibration or
shock. Doing so may cause a personal injury or breakdown.
When loading/unloading printing paper, be careful not to cut or jam your
fingers in the printer.
Point the antenna surface in the direction of the object (concrete) while you
are performing a probe. If it is pointed into the air or otherwise unsuitable
direction, it can cause malfunction of other equipment or other such accidents.
Do not use this product in the vicinity of a radio or TV set. Doing so may
cause noise or poor reception such as disturbance of television pictures.
Doing so also adversely affects the depth sensing capability of this product,
and may cause the cutting of reinforcing steel bars.
Do not use this product near a cell phone or transceiver that transmits
electromagnetic waves. Electromagnetic waves from the cell phone or
transceiver may adversely affect the depth sensing capability of this product,
and may cause the cutting of reinforcing steel bars.
When this product is used for probing on a road, take safety precautions such
as providing guard fences to prevent traffic accidents.

v
Appearance

vi
Table of Contents
Preface i
Before Operation ii
Precautions for Use iii
Appearance v
Glossary of Terms ix
1Description of Equipment 1
1.1 Function 1
1.2 Features 3
1.3 Configuration 5
1.4 Overall System Diagram 6
1.5 Configuration 7
2Parts Names and Functions 8
2.1 Handy Search NJJ-105 8
2.2 Example of the Scan Screen 12
2.2.1 Scan screen example (during scanning) 12
2.2.2 Scan screen example (during not scanning) 14
2.3 Parameter setting screen 16
2.3.1 disp. color 16
2.3.2 disp. direction 16
2.3.3 disp. mode 17
2.3.4 amplitude 18
2.3.5 X-axis 19
2.3.6 depth 19
2.3.7 date/time 19
2.3.8 data No. 20
2.3.9 Folder 20
2.3.10 dist. adj. 21
2.3.11 output 21
2.3.12 disp. range 22
2.3.13 XY.unit 22
2.3.14 Character Mode 22
2.3.15 Search PRCS 22
2.3.16 Scroll.speed 23
2.3.17 default 23
2.3.18 disp.color. setting 23
2.3.19 disp. direction. setting 23

vii
2.3.20 disp.mode. setting 24
2.3.21 Amplitude. setting 24
2.3.22 X-axis. setting 24
2.3.23 depth. setting 24
2.3.24 output. setting 25
2.3.25 disp. range. setting 25
2.3.26 gain. setting 25
2.3.27 Marker 25
2.4 CF Control screen 26
3Operating Method 27
3.1 Scan preparation 29
3.2 Scanning 36
3.2.1 Power-on procedure 36
3.2.2 Scanning 36
3.2.3 Sensitivity 38
3.2.4 Antenna Mark 38
3.2.5 Real time manual deduction processing 39
3.3 Operation while not Scanning 41
3.3.1 Mode switching 41
3.3.2 Sensitivity switching 42
3.3.3 Cursor operation 42
3.4 Image Processing 48
3.4.1 Fixed surface wave processing 48
3.4.2 User surface wave processing 49
3.4.3 Deduction processing 51
3.4.4 Manual surface wave processing 53
3.4.5 Average wave processing 55
3.4.6 Peak processing 55
3.4.7 Original image 57
3.5 How to determine depths and sample scan data 58
3.6 External output methods 59
3.6.1 Printer output 59
3.6.2 Data saving in CF memory 61
3.7 CF Control Screen 67
3.7.1 Displaying the thumbnail images of saved data 68
3.7.2 Reading saved data 68
3.7.3 Deleting a saved data 71

viii
3.7.4 Deleting all saved data under the selected folder 71
3.7.5 Deleting all saved data in the CF memory 73
3.8 Power-off Procedure 74
3.9 Clearing up this product and accessories 74
3.10 About the battery pack and charger 75
3.10.1 Battery pack BP-3007 series 76
3.10.2 Charging Device BC-3008 series 78
4Theory 79
4.1 Principle of Operation 79
4.2 Applicable Conditions 80
5Maintenance Inspection 81
5.1 Daily Inspection 81
5.2 Daily Maintenance 81
5.3 Troubleshooting 82
6After-sales Service 84
7Disposal 85
7.1 Disposal of Used Battery Pack 85
7.2 Disposal of this product 85
8Specification 86
8.1 Handy Search NJJ-105 86
8.2 Battery pack BP-3007 series 87
8.3 Battery charger BC-3008 series 87
9Where to Contact 88

ix
Glossary of Terms
A-mode Displays received waveform as it is. The conditions of concrete directly
underneath this product are displayed as reflected waveform in real time.
B-mode
Displays the vertical cross section of a scan point by gradating the
reflected waveform shown in A-mode according to reflection intensity and
continuously displaying it.
BA-mode Displays both B-mode and A-mode images at the same time.
Real time
auto surface wave
processing
Image processing to automatically remove the unwanted waves reflected
from the concrete surface during scanning by using the internal fixed
surface wave data and shows only the reflected wave from rebar etc.
Real time
manual deduction
processing
Image processing used in the case where the unwanted waves reflected
from the concrete surface can not be fully removed by using the real time
auto surface wave processing and the unwanted waves remain as the
form of stripes in the scan result.
In this Image processing, an arbitrary line is designated while scanning.
The data of the designated line is subtracted from the scan result data,
and the reflected wave from the concrete surface is automatically
removed. Thus, only the reflected waves from rebar etc. are shown.
Real time
auto user
surface wave
processing
Image processing to automatically remove the unwanted waves reflected
from the concrete surface during scanning by using the surface wave data
which are defined by the user and stored in the product and shows only
the reflected wave from rebar etc.
Fixed surface
wave
processing
Image processing to remove the unwanted waves reflected from the
concrete surface by using the internal fixed surface wave data and shows
only the reflected wave from rebar etc.
User surface wave
processing
Image processing to remove the unwanted waves reflected from the
concrete surface by using the surface wave data which are defined by the
used and stored in the product and shows only the reflected wave from
rebar etc.
Deduction
processing
Image processing to remove the stripe reflected waves throughout the
entire depth, such as reflected waves from the concrete surface and from
the rear surface etc. In this processing, an arbitrary line in the scan result
is designated and the designated line is subtracted from the scan result
data and only the reflected waves from rebar etc. are shown.
Manual
surface wave
processing
Image processing to remove the unwanted waves reflected from the
concrete surface by using the surface wave data of the disignated
position in the search results and shows only the reflected waves from
rebar etc. In this processing, an arbitrary line is designated from scan
results. The surface portion of the designated line is subtracted from the
scan result data, and the reflected waves from the concrete surface is
removed.
Average wave
processing
Image processing to remove the stripe reflected waves throughout the
entire depth, such as reflected waves from the concrete surface and from
the rear surface etc. In this processing, the averaged waveform of the
entire scan results data are calculated and is subtracted from the scan
result data, and only the reflected waves from rebar etc. are shown.
Peak processing
Image processing that shows only the waveform of the first peak on the
+side of the scan result. This enables removal of multiple reflected
signals and only displays the upper rebar.

x
Glossary of Terms (Continued)
Original image Restores the image processed result to the original state and displays
unprocessed raw data.
Distance feed
scan
Scan method that performs scanning in accordance with Handy Search's
traveling distance, using the distance detector mounted on the wheels of
this product.
Time feed scan Scan method that performs B-mode scanning at preset time intervals,
regardless of movement of this product.
Relative dielectric
constant
Object-specific coefficient. The radio wave propagation velocity changes
with the relative permittivity (dielectric constant). Therefore, the wave
propagation velocity and search depth change based on the relative
permittivity of the concrete. Calculation error of search depth can be
reduced by setting a depth calibration value.

- 1 -
1 Description of Equipment
This product is indispensable for repairing/rebuilding and maintaining reinforced
concrete structures using its accurate and speedy diagnostic technology.
This product (concrete internal probe vehicle) radiates electromagnetic waves
through the surface of concrete and receives reflected signals from objects found
inside such as reinforcing steel bars, cavities, or other objects that have different
electrical characteristics from concrete. Object position and depth are then displayed
and recorded as image data.
CAUTION
Judge the scan result with considering the depth sensing capability of this
product. Since the depth sensing capability of this product is subject to the
conditions of the object of investigation, judging the scan result with no
consideration of the depth sensing capability may cause the accidental cutting
of rebar.
1.1 Function
Table 1-1 shows functions and performances of this product.
Table 1-1 Functions and Performances of this product
No. item Functions and Performances
1 Search method Electromagnetic wave radar method
2 Search object Rebar (reinforcing steel bar), Polyvinyl-chloride pipe,
Cavity, etc.
3 Search depth 5 to 300mm for concrete having a relative dielectric
constant ＝6.2 and the top rebar of diameter ≧6mm
4 Depth resolution Approx. 1 mm at the display range setting of Shallow
Approx. 2 mm at the display range setting of Deep
5
Horizontal
discrimination
resolution
≧75mm for the scanned object located at depth < 75mm
≧Depth of the scanned object for the object located at
depth ≧75mm
※Typical performance for the reference concrete:
This product allows the user to discriminate between two
rebars located respectively at depth 75mm and 175mm and
at the interval of 40 mm.

- 2 -
Table 1-1 Functions and Performances of NJJ-105 (Continued)
No. item Functions and Performances
6 Maximum search
depth 2.5mm
7 Maximum scan
distance 15m
8 Display mode B-mode (Vertical Cross Section) and BA-mode(Vertical
Cross Section and Reflection Waveform Graph)
During scanning:
Real time auto surface wave processing, Real time manual
deduction processing, and Real time user surface wave
processing
9 Image processing After scanning:
Fixed surface wave processing, User surface wave
processing, Deduction processing, Manual surface wave
processing, Average wave processing, Peak processing,
and Original image
10 Depth calibration 2.0 to 20.0, 0.1 step and time
11 Maximum scan
speed
Approx. 40cm/s, Alarm capability furnished for the over
speed scanning
12 Control functions Display marker（Maximum 42 points), Battery capacity
indicator, and Display inverse video
13 Data output
functions
Dedicated printer (Option, Monochrome print) and
CF Memory (Approx. 200 scan data of 15m distance and
binary format can be stored in the 1GB CF memory)

- 3 -
1.2 Features
This product has the following features:
(1) The material of the object to be scanned can be either metallic or non-metallic
Reflected electromagnetic waves are generated at an interface when the
electrical property of an object is different from that of concrete. Thus, this
product can probe polyvinyl-chloride pipes and cavities (dependent on the
position and size) as well as the reinforcing steel bars. Note that
polyvinyl-chloride pipes and cavities echo weakly in compared with the
reinforcing steel bars.
If a polyvinyl-chloride pipe or cavity is near or below the reinforcing steel bars,
the reflected signals from the polyvinyl-chloride pipe or cavity may not be
obtained due to the strong reflected signals from the reinforcing steel bars. Thus,
care should be taken when you make a judgment on the scan result.
(2) Detects rebars that cross the scanning direction
Rebar that cross the scanning direction transmit a large magnetic wave
reflection. On the other hand, rebar that is parallel to the scanning direction
transmit a smaller magnetic wave reflection. Even if scanning is performed
above rebar that is parallel to the scanning direction, this product can still detect
any rebar that is crosswise to the scanning direction.
(3) Obtaining continuous scan results
The scan result are obtained as a representation of the vertical cross section
of the inside of concrete. Thus, a comprehensive view of the internal concrete
conditions can be obtained.
(4) Obtaining scan results at the site
This product does not need to be secured to the surface of concrete.
Scanning is carried out while this product is moved, and scan results
concerning the internal conditions of the concrete can be provided immediately.
(5) Saving and reading scan data
Using a CF memory, scan data can be saved and reopened (maximum of
roughly 50 sets of data can be saved in text format for a depth of 15 m using a
512 MB CF). The data can also be loaded from the CF memory into a PC by
using a memory reader or the like.
(6) Printing without cable connection
This product is equipped with IrDA, therefore, printing can be performed
without using a cable using a DPU-3345 series printer.
However, the IrDA optical receptors for this product and the printer must be
set facing each other at a distance of 50 ~ 500 mm (without any obstacles
between them).

- 4 -
(7) Performing real time automatic surface wave processing
Internal fixed surface wave data is used to automatically remove the wave
reflected from the concrete surface during scanning enabling the showing of the
reflected wave from rebar.
Furthermore, surface wave processing can be switched to processing that
uses scan data surface waves during scanning (real time manual deduction)
enabling highly accurate surface processing.
(8) Displaying the data of an arbitrary point after scanning (scroll function)
This product can store 15m worth of data at a time and display the data of
arbitrary points continuously.
(9) Changing sensitivity and performing image processing for scan data
This product can display scan results after changing sensitivity or performing
image processing (manual surface wave processing, peak processing, original
image, fixed surface wave processing, or deduction processing). Thus,
performing a scanning again with a new sensitivity setting is not necessary.
(10) A marker can be displayed in the scan results using the cursor marker function.
A maximum of 42 cursor markers can be placed in the scan results to display
the scan position and depth of the marker.
(11) Providing the screen inversion function
Screen inversion function is available. In case of scanning from right to left on
a wall surface, the display on the screen is upright (normal). In the case of
scanning left to right, the display will be inverted.
Therefore, the user can achieve the correct display by performing the scan
either right to left or left to right.
(12) Recording of date and settings
The main unit records the date and settings (data number, sensitivity, etc.)
using a backup function. When data is output, the date and settings are
recorded.
(13) Compact and light weight
This product weighs only about 1.1 kg, so it is easy to operate.
(14) Operating with the battery pack and commercial power supply
This product can operate with the battery pack for about 1.5 hours (at normal
temperature). It can also operate with the commercial power supply when an AC
adapter (optional) is used.

- 5 -
1.3 Configuration
(1) Standard components
Table 1-2 shows the standard configuration of the Product NJJ-105.
Table 1-2 Standard Components
Name Model Number Quantity Remarks
Handy Search NJJ-105 1
Battery pack BP-3007 series 1
Battery charger BC-3008 series 1
AC cable CB-JP05 series 1 For the battery
charger
Hand strap H-7ZYMD0018 1
CF memory TS1GCF80 1 Memory size: 1GB
Storage box H-7ZYMD0017 series 1
Users Guide DC50-NJJ-105 1 This manual
Quick instruction sheet DC60-NJJ-105 1
License agreement for software DC20-NJJ-105 1
(2) Options
Table 1-3 shows optional products that are provided in addition to the
standard components.
Table 1-3 Options
Name Model Number Remarks
Battery
charger set for
the Handy
Search (*1)
CBK-154
For the battery pack BP-3007 series:
Set configuration: Adapter (PWC-L07 series)
AC cable (CB-JP05 series)
Printer set CMZ-303
Set configuration: Printer (DPU-S445 series)
Battery pack (BP-L0720 series)
Printing paper (TP-341series)
AC adapter set
(*1) CBD-2485 Set configuration: AC adapter (PW-0904 series) AC cable (CB-JP04) series
Battery
charger set for
the printer (*1)
CBK-254
For the battery pack BP-L0720 series
Set configuration: Adapter (BC-3008 series)
AC cable (CB-JP04 series)
Battery pack
(*1) BP-3007 series For the Handy Search (NJJ-105)
Battery pack BP-L0720
series
For the printer DPU-S445 series
Printing paper
(*1) TP451C Set of 10 rolls
(*1): Are common for NJJ-95 series option printer DPU-3445.

- 6 -
1.4 Overall System Diagram
Figure 1-1 shows the overall system diagram of this product.
Figure 1-1 Overall System Diagram
LCD
CPU Memory
Distance
Detector
Op key
Control section
IrDA Trans
CompactFlash memory
Trans Receive
Rec. antenna
Trans antenna

- 7 -
1.5 Configuration
Figure 1-2 shows the external views of this product.
Figure 1-2. Handy Search NJJ-105 external dimensions diagram
Top view drawing
64
79
4
147
Side view drawing
216
149

- 8 -
2 Parts Names and Functions
2.1 Handy Search NJJ-105
This section shows the operation panel of this product and explains the functions for each part.
１２ ３４５６
７ ８９１０ １１ １２ １３
Figure 2-1 Top View

- 9 -
Table 2-1 Main Functions of Parts on this product
Number in
Square Label Function
1 (None) LCD (liguid crystal display) screen
2 (None) Battery holder
3 GAIN Sets the sensitivity
4 SET Sets each of the parameters.
5 ENTER
Decision key for start of image processing and various types of
selection.
6 PRCS Switch to image processing mode.
7 (None) IrDA optical receptor for communicating with the printer
8 (None) CF memory slot
9 START Starts/stops the scanning.
10 MARK Displays a marker on the scan screen.
11
Used for movement of cursor and screen and making changes to the
various parameters.
12 CF Switch to the CF control screen.
13 OUTPUT Key for outputting data.