JRC Handy Search NJJ-95B User manual

ＮＪＪ−９５Ｂ
Handy Search
Instruction Manual

Preface
Thank you very much for purchasing this JRC NJJ-95B Handy Search
The NJJ-95B RC radar nondestructively locates, detects, and displays the depths
and positions of reinforcing steel bars in reinforced concrete structures.
●Before attempting to operate the NJJ-95B, please read through this instruction
manual carefully to learn all of its features and ensure correct and trouble-free
operation.
●Keep the instruction manual handy for reference. Refer to the manual for
information about the NJJ-95B or when experiencing trouble during operation.
DC01-NJJ-95B
First edition September 2006
i

ii
Before Operation
Pictorial Indication
Various icons are included in this manual and are shown on these
equipment so that you can operate them safely and correctly and
prevent any danger to you and/or to other persons and any damage to
your property during operation. Such indications and their meanings
are as follows.
Please understand them before you read this manual.
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
equipment is not operated correctly.
CAUTION
This indication is shown where any person is supposed to be injured or any
property damage is supposed to occur if this indication is neglected and this
equipment is not operated correctly.
Examples of Pictorial Indication
Electric
shock
The 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
The 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
The zmark indicates instruction.
Detailed content of the instruction (“Disconnect the power
plug” in the example on the left.) is shown in the mark.
● JRC assumes no liability for any damage (such as damage
caused to reinforcing steel bars, electrical pipes, gas pipes,
etc.) arising from search results using this radar.

iii
FCC NOTICES:
This device complies with part 15 of the FCC Rules:
Operation is subject to the following conditions:
1. This device many not cause harmful interference, and
2. This device must accept any interference received, Including interference that
may cause undesired operation
Warning:
Changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.
Operation of this device is restricted to law enforcement, fire and rescue
officials,scientific research institutes, commercial mining companies, and
construction companies. Operation by any other party is a violation of 47
U.S.C. § 301 and could subject the operator to serious legal penalties.
Coordination Requirements.
(a) UWB imaging systems require coordination through the FCC before the
equipment may be used. The operator shall comply with any constraints on equipment
usage resulting from this coordination.
(b) The users of UWB imaging devices shall supply detailed operational areas to
the FCC Office of Engineering and Technology who shall coordinate this information with
the Federal Government through the National Telecommunications and Information
Administration. The information provided by the UWB operator shall include the name,
address and other pertinent contact information of the user, the desired geographical
area of operation, and the FCC ID number and other nomenclature of the UWB device.
This material shall be submitted to the following address:
Frequency Coordination Branch., OET
Federal Communications Commission
445 12th Street, SW
Washington, D.C. 20554
ATTN: UWB Coordination
(d) Users of authorized, coordinated UWB systems may transfer them to other qualified
users and to different locations upon coordination of change of ownership or location to the FCC
and coordination with existing authorized operations.
(e) The NTIA/FCC coordination report shall include any needed constraints that
apply to day-to-day operations. Such constraints could specify prohibited areas of
operations or areas located near authorized radio stations for which additional
coordination is required before operation of the UWB equipment. If additional local
coordination is required, a local coordination contact will be provided.
(f) The coordination of routine UWB operations shall not take longer than 15

iv
business days from the receipt of the coordination request by NTIA. Special temporary
operations may be handled with an expedited turn-around time when circumstances
warrant. The operation of UWB systems in emergency situations involving the safety of
life or property may occur without coordination provided a notification procedure, similar
to that contained in CFR47 Section 2.405(a)-(e), is followed by the UWB equipment user.
NOTICE: Use of this device as a wall imaging system is prohibited by FCC regulations.

v
<Precautions for Use>
WARNING
Do not use any battery pack other than the BP-3007-A1 or any AC adapter
other than the PW-3009-W.
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 compact flash memory
card 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 specified battery charger to charge the
battery pack.
Doing so may cause fire, electric shock, or breakdown.
Do not attempt to disassemble, modify, or attempt to repair the NJJ-95B 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, 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 plug while your hands are wet.
Doing so could cause an electric shock.
Do not use (place) the NJJ-95B in a location where it is exposed to flammable
or corrosive gas.
Doing so could cause fire, personal injury, or breakdown.
Handy Search is a drip-proof construction but must not be placed in water.
Do not expose the NJJ-95B to water or moisture, and do not use it in rainy
weather. Doing so could cause an electric shock or breakdown.
Stop using the NJJ-95B 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,
sales outlet, or service station. Use of the NJJ-95B in an abnormal state could
cause fire or breakdown.
Should the NJJ-95B 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, sales outlet, or
service station.
Use of the NJJ-95B 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.

CAUTION
Making a judgement on the search results considering the depth sensing
capability of the NJJ-95B:
Since the depth sensing capability of the radar is subject to the conditions of
the object of investigation, judging the search results with no consideration of
the depth sensing capability may cause the cutting of rebar.
Put your hand through the hand strap and hold the NJJ-95B.
Dropping of the radar 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 the NJJ-95B 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) the NJJ-95B in a humid or dusty location, or a location
where water, oil, or chemical may splash onto the radar. Doing so may cause
fire, electric shock, or breakdown.
Do not use (place) the NJJ-95B 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 the NJJ-95B 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 the
radar, and may cause the cutting of reinforcing steel bars.
Do not use the NJJ-95B 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 the radar, and
may cause the cutting of reinforcing steel bars.
When the NJJ-95B is used for probing on a road, take safety precautions such
as providing guard fences to prevent traffic accidents.
vi

<Appearance of the NJJ-95B>
vii

Table of Contents
Preface i
Before Operation ii
<Precautions for Use> v
<Appearance of the NJJ‑95B> vii
Glossary of Terms xi
1Description of Equipment 1
1.1 Function 1
1.2 Features 3
1.3 Configuration 6
1.4 Overall System Diagram 7
1.5 Configuration 8
2Parts Names and Functions 10
2.1 Handy Search NJJ‑95B 10
2.2 Example of Scan Test Screen 14
2.2.1 Scan test screen example (during testing) 14
2.2.2 Scan test screen example (not during testing) 16
2.3 Parameter Settings Screen 19
2.3.1 Display color 19
2.3.2 Inversion of the screen 20
2.3.3 Display mode 21
2.3.4 Gradation system 22
2.3.5 Calibration method 22
2.3.6 Depth calibration 23
2.3.7 Date, time 23
2.3.8 Data No. 24
2.3.9 Distance compensation 24
2.3.10 Output Data Format 25
2.3.11 Display Range 25
2.3.12 Character Mode 25
2.3.13 Return to standard 26
2.4 CF Control screen 27
3Operating Method 28
3.1 Scanning Test Preparation 30
3.2 Scan Test 36
3.2.1 Power‑on Procedure 36
3.2.2 Scan Test 36
3.2.3 Sensitivity 38
3.2.4 Antenna Mark 38
viii

3.2.5 Real time manual deduction processing 40
3.3 Operation while not Scan Testing 42
3.3.1 Mode switching 42
3.3.2 Sensitivity switching 43
3.3.3 Cursor operation 43
3.4 Image Processing 45
3.4.1 Manual surface wave processing 45
3.4.2 Peak Processing 47
3.4.3 Reproduction of original image 49
3.4.4 Fixed surface wave processing 50
3.4.5 Deduction processing 50
3.5 How to Determine Depths and Sample Scan Test Data 52
3.6 External Output Methods 54
3.6.1 Printer Output 54
3.6.2 Data saving in compact flash memory 56
3.7 CF Control Screen 62
3.7.1 Displaying the thumbnail images of saved data 62
3.7.2 Reading saved data 62
3.7.3 Deleting saved data 63
3.7.4 Method for initialization of Compact Flash 65
3.8 Power‑off Procedure 67
3.9 Clearing up the radar and accessories 67
3.10 About the Battery Pack and Charger 68
3.10.1 Battery pack BP‑3007 series 69
3.10.2 Charging Device BC‑3008 series 72
4Options 74
4.1 Printer DPU‑3445 series 75
4.1.1 Printer's main parts names and functions 75
4.1.2 Printer Specification 76
4.1.3 Connecting the battery pack/power source 77
4.2 AC Adapter PW‑0904‑W1 series 81
4.2.1 AC Adapter Specification 81
4.2.2 Connecting the AC adapter 81
5Theory 82
5.1 Principle of Operation 82
5.2 Applicable Conditions 83
6Maintenance Inspection 85
6.1 Daily Inspection 85
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6.2 Daily Maintenance 85
6.3 Troubleshooting 86
7After‑sales Service 88
8Disposal 89
8.1 Disposal of Used Battery Pack 89
8.2 Disposal of the NJJ‑95B 89
9Specification 90
9.1 Handy Search NJJ‑95B 90
9.2 Battery pack BP‑3007 series 92
9.3 Charging Device BC‑3008 series 92
10 Where to Contact 93
x

Glossary of Terms
A mode Displays received waveform as it is. The conditions of concrete directly underneath the Handy Search 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 that uses internal fixed surface wave data to
automatically remove the wave reflected from the surface of the concrete
during scanning and only shows the reflected wave from rebar etc.
Real time
Manual
Deduction
processing
Image processing used in the case that the effect of the reflected waves
from the surface of the concrete can not be fully removed using the
internal fixed surface wave data of the real time auto surface wave
processing. Thus, reflected waves in the form of stripes remain in the
scanning results.
Image processing where an arbitrary line is designated while scanning.
The data of the designated line is subtracted from the scanning results
data, and the reflected wave from the concrete surface is automatically
removed. Thus, only the reflected waves from rebar etc. are shown.
Manual
Surface wave
processing
Image processing where an arbitrary line is designated from scanning
results. The surface portion of the data from the designated line is
subtracted from the scanning results data, and the reflected wave from
the concrete surface is automatically removed. Thus, 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 scanning results.
This enables removal of multiple reflected signals and only displays the
upper rebar.
Fixed surface
wave processing
Image processing that uses internal fixed surface wave data to remove
the wave reflected from the surface of the concrete and only shows the
reflected wave from rebar etc.
Deduction
processing
Image processing where an arbitrary line from the scanning results is
designated and the designated line is subtracted from the scanning
results data. Stripe reflected waves throughout the entire depth, such as
reflected waves from the concrete surface and reflected waves from the
rear surface etc., are removed and only the reflected waves from rebar
etc. are shown.
Reproduction of
original image This processing restores the image processing result to the original state and displays unprocessed raw data.
Distance feed
system
Method that performs scanning in accordance with Handy Search's
traveling distance, using the distance detector mounted on the wheels of
the Handy Search.
Time feed system Method that performs B-mode scanning at preset time intervals,
regardless of movement of the Handy Search.
Relative dielectric
constant
Object-specific coefficient. The radio wave propagation rate changes with
the value of the relative permittivity. Therefore, the wave propagation
velocity and scanning depth change change based on the relative
permittivity of the concrete. Calculation error of scanning depth can be
reduced by setting a depth calibration value.
xi

1 Description of Equipment
This equipment is indispensable for repairing/rebuilding and maintaining reinforced
concrete structures using its accurate and speedy diagnostic technology.
The Handy Search concrete internal probe vehicle, NJJ-95B, (hereafter called this
radar) 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
Making a judgement on the search results considering the depth sensing
capability of the NJJ-95B:
Since the depth sensing capability of the radar is subject to the conditions of
the object of investigation, judging the search results with no consideration of
the depth sensing capability may cause the accidental cutting of rebar.
1.1 Function
This radar has the following functions:
•Sense depth ：5 – 300 mm*1
•Display mode: ：B mode (vertical cross section)
BA mode (vertical cross section and reflected waveform
display)
•Image processing during sensing ：Automatic real-time surface wave
processing
Real time manual deduction processing
•Sensing method ：Distance feed system (sensing method based on the
distance the main body moves)
Time feed system (sensing at preset time intervals)
•Sense deptch ：Max 15 m (case of using time feed – 150 seconds)
•Internal memory ：Max 15 m (case of using time feed – 150 seconds)
Image processing: ：Manual surface wave processing, fixed surface wave
processing, peak processing, deduction processing, and reproduction of original
image
•External output*2 ：Printer output (IrDA)
•Saving data ：Compact flash memory card
‑ 1 ‑

*1: For the case that the relative dielectric constant of concrete is a uniform 6.2
and the upper rebar has a diameter of 6 mm or more
*2: The printer is optional.
‑ 2 ‑

1.2 Features
This device 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 radar
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 search results.
(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 device can still detect
any rebar that is crosswise to the scanning direction.
(3) Obtaining continuous scanning results
The scanning results 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 scanning results at the site
Handy Search does not need to be secured to the surface of concrete.
Scanning is carried out while Handy Search is moved and results concerning
the internal conditions of the concrete can be provided immediately.
(5) Saving and reading scan data
Using a compact flash 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 compact flash). The data can also be loaded from the
compact flash memory card into a PC by using a card reader or the like.
(6) Printing without cable connection
The unit is equipped with IrDA, therefore, printing can be performed without
using a cable using a DPU-3345 series printer.
‑ 3 ‑

However, the IrDA optical receptors for this unit and the printer must be set
facing each other at a distance of 50 ~ 500 mm (without any obstacles between
them).
(7) Performing real time automatic surface wave processing
Internal fixed surface wave data is used to automatically remove the wave
reflected from the surface of the concrete 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 radar can store 15m woth of data at a time and display the data of
arbitrary points continuously.
(9) Changing sensitivity and performing image processing for scan data
This radar can display scan results after changing sensitivity or performing
image processing (manual surface wave processing, peak processing,
reproduction of original image, fixed surface wave processing, or deduction
processing). Thus, performing a scan test again with a new sensitivity setting is
not necessary.
(10) A mark can be displayed in the scan results using the cursor mark function.
A maximum of 7 cursor marks can be placed in the scan results to display the
scan position and depth of the mark.
(11) Providing the screen inversion function
(11) 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.
‑ 4 ‑

(13) Compact and light weight
This radar weighs only about 1.1 kg, so it is easy to operate.
(14) Operating with the battery pack and commercial power supply
This radar 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
Standard components
Table 1-1 shows the standard configuration of the Handy Search NJJ-95B
Table 1-1 Standard Components
Name Model Number Quan
tity Remarks
Handy Search NJJ-95B 1
Battery pack BP-3007 series 1
Battery charger BC-3008 series 1
AC cable CB-A01-J1-E series 1 For the battery
charger
Hand strap H‑7ZYMD0018 1
Compact flash memory card CF115‑512M 1 Memory size: 512MB
Storage box H‑7ZYMD0017 1
Instruction manual DC00‑NJJ‑95B 1
Quick instruction sheet DC10‑NJJ‑95B 1
License agreement for software DC20‑NJJ‑95B 1
Users Guide CD-R H‑7ZYMD0016 1
Options
Table 1-2 shows optional products that are provided in addition to the
standard components.
Table 1-2 Options
Name Model Number Remarks
Printer set CMZ-203
Set configuration: Printer (DPU-3445 series)
Paper holder (RH-48-00 series)
Battery pack (BP-3007 series)
Recording paper (TP451C)
AC adapter set CBD-2485 Set configuration: AC adapter (PW-0904-W1 series)
AC cable (CB-A01-J1-E) series
Battery charger set CBK-154 Set configuration: Adapter (BC-3008 series)
AC cable (CB-A01-J1-E series)
Battery pack BP-3007 series Shared between handy search and printer
Printing paper TP451C Set of 10 rolls
‑ 6 ‑

1.4 Overall System Diagram
Table 1-1 shows the total configuration of the Handy Search NJJ-95B
Trans Rec. antenna
ReceiveTrans
Com
p
act Flas
h
IrDA Trans
Control section
Op ke
y
Distance Detector
Memo
CPU
LCD
Figure 1-1 Overall System Diagram
‑ 7 ‑

1.5 Configuration
Figure 1-2 shows the external views of this radar.
Plan view drawing
149
216
Side view drawing
147
79 644
Fig. 1-2. Handy Search NJJ-95B external dimensions diagram
‑ 8 ‑