JRC NJJ-105 Handy Search User Manual

ＮＪＪ－１０５

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. Do i n g 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
1 Description 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

2 Parts 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

3 Operating 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

4 Theory 79

4.1 Principle of Operation 79

4.2 Applicable Conditions 80

5 Maintenance Inspection 81

5.1 Daily Inspection 81

5.2 Daily Maintenance 81

5.3 Troubleshooting 82
6 After-sales Service 84
7 Disposal 85

7.1 Disposal of Used Battery Pack 85

7.2 Disposal of this product 85
8 Specification 86

8.1 Handy Search NJJ-105 86

8.2 Battery pack BP-3007 series 87

8.3 Battery charger BC-3008 series 87
9 Where 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.