Twilight A60+ User manual

Localizador de varillas de concreto, Galaxy
GL-A60+

Rebar Scanner with Scanning Trolley
A60+
Instruction Manual

Rebar Scanner A60+
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CHAPTER I OVERVIEW ............................................................... 1
1.1 BRIEF INTRODUCTION .............................................................1
1.2 MAIN FUNCTIONS....................................................................1
1.3 MAIN FEATURES ....................................................................2
CHAPTER II INSTRUMENT COMPOSITION AND MAINTENANCE
REQUIREMENTS ......................................................................... 3
2.1 INSTRUMENT COMPOSITION ....................................................3
2.2 PREPARATION BEFORE OPERATION ..........................................3
2.3 REPLACE BATTERY..................................................................3
2.4 PRECAUTIONS .........................................................................3
CHAPTER III INSTRUCTION OF OPERATION INTERFACE........... 4
3.1 KEYBOARD INTRODUCTION ....................................................4
3.2 BRIEF INTRODUCTION OF OPERATION .....................................4
3.2.1 START-UP .............................................................................4
3.2.2 INTERFACE OF FUNCTION SELECTION...................................5
CHAPTER IV DETECTION.......................................................... 25
4.1 RESET ......................................................................................26
4.2 LOCATION OF SINGLE REBAR AND DETECTION OF COVERING
LAYER THICKNESS AND REBAR DIAMETER ....................................26
4.3 LOCATION OF MULTIPLE REBAR AND DETECTION OF COVERING
LAYER THICKNESS .........................................................................29
CHAPTER V DETECTION METHOD OF REBAR ......................... 33

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Conventions used in this manual:
1、Words in box represent the key, e.g. ENTER indicates the
confirmation key.
2、The words with gray shading indicate the item on the interface, e.g.
Serial number indicates the “No.” item on corresponding interface.
3. Words with gray shading without box in data processing software
indicate control name (check box and input box etc.) in the pop-up
window on the screen, e.g. file name input box in the window of
opening file.
4. Chinese characters or characters with gray shading in box represent
the button in data processing software, e.g. Confirm indicates the
confirmation button in dialog box.

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Chapter I Overview
1.1 Brief introduction
Rebar Scanner A60+ is used to detect current reinforced concrete
project and new reinforced concrete structure construction quality and
determine the location and layout of rebar. If the diameter is known, it
will be used to detect the thickness of concrete covering layer. If the
diameter is not known, it will be used to detect rebar diameter and
thickness of concrete covering layer at the same time. Besides, it
possesses the function of scanning path. And it can detect the location
of magnetic substance and electric conductor in non-magnetic and
non-conductive medium, e.g. cable inside wall body and water &
heating pipe etc. This instrument is a kind of intelligent nondestructive
test equipment possessing the functions of automatic detection, data
memory and output.
1.2 Main functions
1、Detect the location and direction of rebar in concrete
structure；
2、Detect covering layer thickness of rebar (diameter is known)；
3、At the same time, estimate diameter of rebar and thickness of
covering layer；
4、Detect the thickness of covering layer under the same
measuring surface and display grid pattern image；
5、Detect the thickness of covering layer under the same
measuring line and display section plane image；
6、Self-calibration function of probe；
7、Memory and view of detected data；

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1.3 Main features
1、 Accurate location of rebar and detection of rebar diameter
and covering layer thickness；
2、 Possess scanning functions of grid pattern and section plane
to detect accurately covering layer thickness of rebar;
3、 Multiple location modes of rebar: Voice alarm prompt, black
indicator, thickness and signal value, which are used for
accurate location of rebar；
4、 Sensor is placed above the rebar in parallel. One detection
attitude can estimate rebar diameter and covering layer
thickness at the same time. Without switching detection
attitude, quick detection of rebar diameter and covering layer
thickness can be achieved;
5、 High detection accuracy of rebar diameter and covering
layer thickness；
6、 Show grid pattern and section plane images of rebar
visually；
7、 Interface of software is succinct and operation is simple；

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Chapter II Instrument composition and maintenance requirements
2.1 Instrument composition
The instrument is composed of main unit, two signal cable, transducer
and scanning trolley etc.
2.2 Preparation before operation
Firstly, take the instrument out of the casing. During Thickness
Test and Diameter Test, connect the main unit to the main unit. During
Rebar Scan, the main unit is connected with the probe and scanning
trolley. Then press the key on the keyboard. Start-up screen
appears.
2.3 Replace battery
When insufficient electric quantity or voltage is less than 7.0V
are showed on start-up screen, please replace the battery. Pay attention
not to reverse the battery polarity.
2.4 Precautions
1. Avoid water in.
2. Avoid high temperature（ >50 ℃）.
3. Avoid being near very strong magnetic field, e.g. large
electromagnet and transformer etc.
4. When the instrument is not used for a long time, please take
out of the battery to avoid damaging the circuit due to battery
leakage.
5. Without permission, please not open the instrument casing.
Otherwise, user will responsible for the consequence!

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Chapter III Instruction of operation interface
3.1 Keyboard introduction
There are 9 keys in total on the keyboard. key is used as
power switch of instrument；ENTER key is used to confirm operation
in parameter setting and automatic calibration operation of instrument;
SAVE key is used to store measured values; ESC key is used to return
last menu in operation; RANGE key is used to switch the first
nominal range and the second nominal range; --the first nominal
range，used in the condition of less thickness of covering layer，
--the second nominal range，used in the condition of larger thickness
of covering layer; ←, ↑, → and ↓ keys are used respectively in
auxiliary functions like menu selection, digit add & subtract and
cursor movement etc.
3.2 Brief introduction of operation
3.2.1 Start-up
Press the key on instrument panel to switch on the instrument.
Then begin operation. Start-up interface is shown as figure 3-1.
Figure 3-1 Start-up interfaces
Rebar Scanner
Version:1.4
Battery:9.0V
GALAXY HI TECH

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3.2.2 Interface of function selection
Press any key on start-up interface to enter into the interface of
function selection, as figure 3.2 shows. It includes functions of
Thickness Test detecting covering layer thickness, Diameter Test
detecting reinforced bar diameter, Rebar Scan detecting covering layer
thickness of grid pattern or multiple parallel rebar, Transfer Data,
View Data, and Delete Data ，through ↑ and ↓keys ，select
corresponding functions and press ENTER key to enter into
corresponding functional interfaces.
Figure 3-2 Interface of function selection
3.2.3 Thickness test
Interface of thickness test is shown as figure 3-3. Firstly, project
information is set. During setting, if Diameter (default is 16mm) and
No. (the initial position is fixed as 1) are known, press ← and →keys
to move the cursor and press ↑ and ↓keys to adjust the value of cursor
position. After above setting is end, press the ENTER key to confirm
the setting. Then probe is self-calibrated. At this time, probe should be
placed in the air and away from the strong magnetic field interference.
At the same time, wait！ is showed on the screen. After wait！is
missing, it indicates self-calibration of probe is end, as figure 3-4
Thickness Test
Diameter Test
Rebar scan
Transfer Data
View Data
Delete Data

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shows. Then enter into detection status.
Figure 3-3 interface of thickness test
During detection, current signal value of probe is showed on the
right side of Signal; the number of saved detecting covering layer
thickness is showed on the right side of Memory; covering layer
thickness of detected rebar is showed on the right side of Thickness;
length of black scroll bar above the Signal indicates the trend which
probe is close to the top of rebar. When black scroll bar is lengthened,
it indicates that probe is close to the top of rebar. When black scroll
bar is shortened, it indicates that probe is away from the top of rebar.
When probe is scanning over the rebar, the instrument gives the
audible alarm. At the same time, covering layer thickness of detected
rebar is showed on the position on the right side of Thickness in large
print. At this time, press the SAVE key to save the data. The value on
the right side of Memory is added 1 automatically and the save is end.
Dia.=16mm No.=
Signal
Memory
Thickness

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Figure 3-4 interface of thickness test
During detection, press the ESC key to return the status of setting
project information; press the ENTER key to self-calibrate probe. At
this time, probe must be placed in the air and away from rebar and
strong magnetic field. After wait ！ on the screen is missing,
self-calibration is end. At this time, continue detection. Press the
RANGE key to switch between the first nominal range and the second
nominal range. After switching nominal range, it is necessary to press
the ENTER key to self-calibrate probe. Otherwise, detection results
are wrong.
To find the position on the top of rebar, firstly, scan roughly.
After hearing the alarm, shift the probe backwards. Because the speed
of shifting the probe for the first time is too much, it is possible to
miss the data during collecting the data. Therefore, after audible alarm,
during shifting the probe backwards, slow down as much as possible.
When audible alarm is heard for the second time, data on the right side
of Signal are changed. Repeat such operation till the value on the right
side of Signal is the maximum. At this time, center of diamond pattern
on the probe is just on the top of rebar.
No.=
Signal
Memory
Thickness

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Note: When covering layer thickness is beyond the lower limit of
nominal range of covering layer thickness, ≤XX is showed on the
screen. When covering layer thickness detected by the first nominal
range is more than 50mm, to improve the detection accuracy, switch
into the second nominal range to carry out detection.
3.2.4 Diameter test
Interface of diameter test is shown as figure 3-5. Firstly, project
No is set (the initial position is fixed as 2). Press ← and →keys to
move the cursor and press ↑ and ↓keys to adjust the value of cursor
position. After above setting is end, press the ENTERkey to confirm
the setting. Then probe is self-calibrated. At this time, probe should be
placed in the air and away from the strong magnetic field interference.
At the same time, wait！ is showed on the screen. After wait！is
missing, it indicates self-calibration of probe is end, as figure 3-6
shows. At this time, enter into detection status.
Figure 3-5 interface of diameter test
During detection, current signal value of probe is showed on the
No.=0000
Signal
Memory
Diameter
Thickness

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right side of Signal; saved amount of information is showed on the
right side of Memory; estimated rebar diameter at the current probe is
showed on the right side of Diameter; equivalent covering layer
thickness at the current probe is showed on the right side of Thickness .
Length of black scroll bar indicates the trend which probe is close to
the top of rebar. When black scroll bar is lengthened, it indicates that
probe is close to the top of rebar. When black scroll bar is shortened, it
indicates that probe is away from the top of rebar.
Figure 3-6 interface of diameter test
To find the position on the top of rebar and detect accurately
detected rebar diameter and covering layer thickness, firstly, roughly
scan. After hearing the alarm, shift the probe backwards. Because the
speed of shifting the probe for the first time is too much, it is possible
to miss the data during collecting the data. Therefore, after audible
alarm, during shifting the probe backwards, slow down as much as
possible. When audible alarm is heard for the second time, data on the
right side of Signal are changed. Repeat such operation till the value
on the right side of Signal is the maximum and black scroll bar is the
longest. At this time, center of diamond pattern on the probe is just on
the top of rebar. Then press the RANGE key and slightly wait for a
No.=
Signal
Memory
Diameter
Thickness

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while so that detected rebar diameter and covering layer thickness can
be estimated and showed correspondingly in the position on the right
side of Diameter and Thickness in large print. At this time, press the
SAVE key to save the data. The value on the right side of Memory is
added 1 automatically indicating the number of this project
information is saved. At this time, continue detection. Press the ESC
key to return the status of setting project information.
During detection, press the ENTER key to self-calibrate probe.
At this time, probe must be placed in the air and away from rebar and
strong magnetic field. After wait ！ on the screen is missing,
self-calibration is end. At this time, continue detection.
Note: If covering layer thickness is less than the corresponding
minimum of measurable covering layer thickness value in table 3.1,
Diameter will show Too Thin ; if covering layer thickness is more than
the corresponding maximum of measurable covering layer thickness
value in table 3.1, Diameter will show Too Thick . At this time,
diameter cannot be detected.
Table 3.1Nominal range of rebar diameter unit：mm
Rebar
diameter
The minimum
measurable covering
layer thickness
The maximum
measurable covering
layer thickness
6 7 60
8 10 60
10 11 65
12 14 65
14 15 65
16 16 65
18 16 65
20 18 65
22 18 65

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25 19 65
28 21 65
32 21 65
3.2.5 Rebar scan
Before entering into Rebar Scan，firstly, connect scanning trolley
and assemble probe and trolley (probe is inserted into the trolley).
Interface of rebar scan is showed as figure 3-7, through ↑ and ↓keys，
select corresponding functions and press ENTER key to enter into
corresponding functional interfaces.
Grid Scan
Profile Scan
Figure 3-7 interface of rebar scan
3.2.5.1 Grid pattern scan
Interface of grid pattern scan is showed as figure 3-8, through ↑
and ↓keys，select length and width requiring detection and press
ENTER key to enter into corresponding functional interfaces.
0.5×0.5
1.0×1.0
2.0×2.0
Large Area
Figure 3-8 interface of grid pattern scan
Interface of 0.5×0.5m gird pattern & rebar scan is shown as
figure 3-9. Firstly, project information is set including known
Diameter of horizontal (Y) and vertical (X) rebar (default is XΦ16mm
and YΦ08 mm) and project No. (The initial position is fixed as 3).

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Press ← and →keys to move the cursor and press ↑ and ↓keys to
adjust the value of cursor position. After above setting is end, press the
ENTER key to confirm the setting. Then probe is self-calibrated. At
this time, probe should be placed in the air and away from the strong
magnetic field interference. At the same time, wait！ is showed on the
screen. After wait！is missing, it indicates self-calibration of probe is
end. At this time, enter into detection status.
X ø16mm
Y ø08mm
3000
D
T
0.5
m
Figure 3-9 interface of 0.5×0.5m grid scan
There is one wheel and the plug on the positive direction of the
trolley. During detection, the trolley only forwards the positive
direction. During going forward, the number under the D is increased.
During detection, the number under the D is horizontal distance
that the probe is relative to the zero point. Unit is mm. Current
covering layer thickness of rebar is showed under the T. Scanning
direction of trolley is showed on the right upper corner. According to
design data or experience, direction of rebar is determined. If direction
of rebar is not determined, position of rebar will be determined
according to detection method of rebar. According to → shown,
longitudinal rebar of grid pattern is detected. Detected point should

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select the position in the middle of crossing point of grid pattern
horizontal rebar to avoid the influence on detected longitudinal rebar
by grid pattern horizontal rebar. The trolley held by hand is moved
horizontally from the left to the right (the trolley is vertical to
extension direction of longitudinal rebar and forward speed is not
more than 20mm/s). One black block shown on the screen is moved
horizontally from the left to the right. After hearing the alarm, it
indicates there is rebar under the probe and rebar is showed on the
screen in the formation of being vertical to X-axis. At the same time,
covering layer thickness is showed under the T. During continuing to
move the trolley forwards, when horizontal length that the trolley
moves is not less than 500, it is prompted by means of continuous
alarm. At this time, press the↓ key to change the direction into↓. Then
detect the horizontal rebar of grid pattern. Similarly, detected point
should select the position in the middle of crossing point of grid
pattern longitudinal rebar to avoid the influence on detected horizontal
rebar by grid pattern longitudinal rebar. The trolley held by hand is
moved from up to down (pay attention to the direction of trolley). One
black block shown on the screen is also moved from up to down. After
hearing the alarm, detected rebar is showed on the screen in the
formation of being parallel to X-axis. At the same time, covering layer
thickness is showed under the T. During continuing to move the
trolley downwards, when longitudinal length that the trolley moves is
not less than 500, it is prompted by means of continuous alarm. At this
time, press the SAVE key to save the data.

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During detection, press the RANGE key to switch the first
nominal range（ ）and the second nominal range（ ）. After
switching the nominal range, the probe must be self-calibrated by
means of pressing the ENTER key. Otherwise, detecting results are
wrong. When the direction is →，press the↓ key to change it into ↓.
At this time, horizontal rebar of grid pattern is detected. Press the
SAVE key to save the data（only the direction is↓）. Press the ENTER
key to self-calibrate probe. At this time, the probe must be placed in
the air and away from rebar and strong magnetic field. After wait on
the screen is missing, self-calibration is end. Then continue detection.
The difference between 1.0×1.0m & 2.0×2.0m and 0.5×0.5m
lies in that horizontal & longitudinal distances of probe relative to the
zero point are respectively ≤1.0m and ≤2.0m. Detection method is the
same.
No boundary scan is convenient for user to carry out a large area
scanning. It gets rid of the limitation of scanning boundary. At the
same time, the maximum scanning range is extended to 10m×10m.
For no boundary scan, the region shown on each screen is 2.0×2.0m.
When the distance is beyond this range, this system will switch
display region automatically. The difference between no boundary
scan and 0.5×0.5m lies in that horizontal & longitudinal distances of
probe relative to the zero point are ≤10m. Detection method is the
same.
During using no boundary scan, please follow strictly the
regulation that forward speed of trolley is not more than 20mm/s.

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Otherwise, missing rebar and display confusion will occur possibly. If
probable scanning range is known, scanning with boundary is
recommended because layout of rebar can be showed more visually.
3.2.5.2 Profile scan
Section plane scan is used for detection of multiple parallel rebar.
Interface of section plane scan is showed as figure 3-10. Through ↑
and ↓keys, according to horizontal length that requires being detected,
press the ENTER key to enter into the interface of detecting this
length.
Figure 3-10 interface of Profile scan
Interface of 0.5m section plane rebar scan is shown as figure 3-11.
Firstly, project information is set including Diameter of longitudinal
rebar (default is 16mm) and No. (The initial position is fixed as 4).
Press ← and →keys to move the cursor and press ↑ and ↓keys to
adjust the value of cursor position. Press the ESC key to return the
function selection interface. After above setting is end, press the
ENTER key to confirm the setting. Then probe is self-calibrated. At
this time, probe should be placed in the air and away from the strong
magnetic field interference. At the same time, wait！is showed on the
screen. After wait is missing, it indicates self-calibration of probe is
end. At this time, enter into detection status.
>>0.5m
1.0m
2.0m
Large Area

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X ø16mm
No.
4000
D
T
·
0.5
m
Figure 3-11 0.5m scanning interface of section plane rebar
During detection, the number under the D is the distance that the
probe is relative to the zero point. Unit is mm. Current covering layer
thickness of rebar is showed under the T. Scanning direction of trolley
is showed on the right side of D. According to design data or
experience, direction of rebar is determined. If direction of rebar is not
determined, position and direction of rebar will be determined
according to detection method of rebar. The trolley held by hand is
moved horizontally from the left to the right (the probe is parallel to
direction of rebar) and the speed is not more than 20mm/s. (At the
same time, one black block shown on the screen is moved horizontally
from the left to the right.) After hearing the alarm, it indicates there is
rebar under the probe and rebar is showed on the screen in the
formation of black block. At the same time, covering layer thickness is
showed under the T. During continuing to move the trolley
horizontally, when horizontal length that the trolley moves is not less
than 500, it is prompted by means of continuous alarm. At this time,
press the SAVE key to save the data.
During detection, press the RANGE key to switch the first