ZBL Science & Technology ZBL-630A User manual

ZBL-R630A Rebar Detector
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Content
1. Introduction ----------------------------------------------------------------------------------------------------------------------3
1.1 Principle 3
1.2 Functions 3
1.3 Features 3
1.4 Technology Data Sheet 3
1. 5 Packaging List 4
1.6 Safety Instructions 4
1.7 Maintenance 5
1.8 Responsibilities 5
2. Starting Measurement----------------------------------------------------------------------------------------------------------6
2.1 Port of ZBL-630A 6
2.2 Keyboard 6
2.3 Charging port 6
2.4 USB port 6
2.5 Sensor port 7
2.6 Sensor 7
2.7 Power supply charger 7
2.8 Signal wire 7
2.9 U-disk 7
2.10 Starting-up interface and Main menu 7
2.11 Keyboard operation 8
2.12 USB transmission 8
2.13 System setting 8
2.14 Introductions of rebar test 9
3. Rebar Test ---------------------------------------------------------------------------------------------------------------------- 10

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3.1 General-scan 10
3.2 Grid-scan 17
3.3 Profile-scan 24
3.4 Data display 26
3.5Data check of ZBL-R630A 26
3.6Rebar data deletion 27
3.7On-site test 28
4. Guide of quick operation-----------------------------------------------------------------------------------------------------33
4.1On-site preparation 33
4.2To connect sensor to host 33
4.3Starting test 33
4.4Data transmission 33
4.5Data analysis and process 33
4.6Data deletion 33
4.7Attention for field detection 34

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1.Introduction
1.1 Principle
The sensor emits magnetic field to part of tested structure, at the same time, receives induced magnetic field
produced by iron-like medium (rebar) in the scope of magnetic field and then converting to electrical signals. The
host analyzes digitalized signal timely and shows with various ways such as graphs, data and sound etc to identify
rebar location, cover thickness and diameter precisely.
1.2 Functions
Identify rebar location, direction and distribution.
Test the thickness of concrete cover.
Test rebar diameter.
Qualify the thickness of concrete cover automatically.
Test data storage, check and transmission.
Analyze professionally with Test Data Processing Software.
1.3 Features
◼Unique all-wheel,dustproof and waterproof multi-parameter rebar probe ensures accuracy and reliability of data taking.
◼Rebar detection is automatically alerted by the probe via flashing red light;
◼Store data in U-disk.
◼Powerful professional analysis-process software allows for the automatic generation of test reports.
1.4 Technology Data Sheet
Applicable range
Ф6mm～Ф50mm
Maximum allowed error
±1rebar standard
Protective layer thickness range
(mm)
First range
Second range
Data transmission
Thumb drive storage available
3～98
3～196
Power
Built-inchargeable lithium battery
Maximum allowed error
for protective layer
thickness
±1 mm
3～56
3～79
Battery Time
>38 hrs
±2 mm
57～69
80～119
Size
212mm´134mm´50mm
±4 mm
70～98
120～196
Weight
0.9kg

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1. 5 Packaging List
ZBL-R630ACarrying case
1
PC-4613N
ZBL-R630A Scanner
1
ZBL-R630A
Battery Charger
1
DC 8.4V/0.5A
Rebar Sensor
1
SET200A
Rebar Sensor
1
SET180C
Signal Wire
1
W-678-678-015B
Crayon
1
Art NO.8000
U-disk
1
Certification
1
User manual
1
Packing List
1
1.6 Safety Instructions
For a better usage, please read operation manual carefully before using the instrument.
⚫Requirements for working environment:
◼Environmental temperature: 0℃～40℃；
◼Relative humidity :< 90%RH;
◼Long time sunlight perpendicular incidence is avoided.
◼Anti-corrosion: when used under damp, dusty and full of corrosive gas conditions, protective measures are
necessary.
⚫Requirements for storage environment:
◼Environmental temperature:-20℃～+60℃.
◼Relative humidity: < 90%RH;
◼Out of use, please place instrument into package, store in a ventilated, cool and dry place, Long time
sunlight perpendicular incidence is avoided.
◼If long time out of use, please charge and start up for a check regularly.
⚫Avoid water.
⚫Avoid usage under strong magnetic field, such as the nearby of large electromagnet or transformer.
⚫Shock-proof: During the process of usage or handling, avoid severe vibration or shock.

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1.7 Maintenance
⚫Power supply
Instrument charges with inside specific chargeable lithium battery, after full charge, it can work last for nearly 26 hours.
When used, please pay attention to left of electricity. If lack of electricity, close instrument quickly and charge in time.
Or it can lead to lose of testing data as a result of sudden blackout even damage to instrument. Avoid using other
batteries or power supplies.
⚫Charge
When charged, plug the power supply into AC220±10%V socket and plug charger into the instrument’s power
supply .when the charge indicator is red, it is charging to the inside battery. When turning to yellow, it is completed. At
that time, unplug the charger in time lest overcharge affects the battery service life.
Attention: To guarantee full charge, please charge 6-8 hours consecutively, at the same time, avoid charge under the
environment of over 60℃.
Long time out of use, charged battery will discharge and lead to decrease of electricity. Recharge before usage. While
charged, a common phenomenon is instrument and charger will be heated in some extent. Good ventilation is necessary
for heat dissipation.
Attention: Avoid charge with other power adapters, or it will cause damage to instrument.
⚫Rechargeable battery
When battery is near the end of service life after frequent charges and discharges, if the battery works abnormally
(cannot charge with electricity, cannot charge full or short time is used after full charge), it is probable that rechargeable
battery has been damaged or reaches its end. At that time, please contact with our company, change a new one. Avoid
short circuit of battery or approaching high source temperature.
⚫Every time when used, proper cleaning for host and sensors etc is necessary against water or dirty into plug in or
instrument, or it will lead to low performance even damage of instrument.
Attention: Avoid placing instrument and fittings in water or cleaning with wet cloth.
Avoid scrubbing instrument and fittings with organic solvent.
Please wipe host and socket with clean and soft dry cloth
1.8 Responsibilities
The instrument is sophisticated testing equipment. When user has one of the following actions or the other
man-made destruction, the company does not undertake related responsibilities:
⚫Violate the above requirements for working and storage environment;
⚫Improper operation;
⚫Open case arbitrarily or dissemble any components without permission;
⚫Man-made or accident-caused severe damage to instrument.

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2.Starting Measurement
2.1 Port of ZBL-630A
2.2 Keyboard
Name
Description
【MENU】
To go back to upper menu in the operating menu
【BACK】
To go back to previous menu
【▲、▼ 、◄、►】
Up, down, left, right direction, shift to the target menus and options,
parameter change, increase or decrease etc.
【SAVE】
To save the test data, time, number and parameter, etc.
【ENTER】
Parameter choice and determination, or change of testing direction.
Power key, opening and closing of instrument
2.3 Charging port
To charge instrument with battery charger attached with the instrument, 6~8 hours is suggested in order to have a full
charge.
2.4 USB port
Port for connection with U-disk is on the left side of instrument baffle. Plug specific U-disk into USB port, testing data
will be transmitted to U-disk through Data Output and then analyze the data in U-disk with computer software.\

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2.5 Sensor port
It is used for connecting with sensor signal wire.
2.6 Sensor
With an integrative design, rebar sensor as shown in fig.2-2 can scan rebar and record displacement of sensor in real
time accurately. While going forward, sensor scans rebar and backward, scrubs it. With an integrative design, rebar
sensor as shown in figure can scan rebar and record displacement of sensor in real time accurately. While going
forward, sensor scans rebar and backward, scrubs it.
Figure 2-2
2.7 Power supply charger
Entry plug connects with 100~240V AC power supply and exit plug into charging plug of host for charging of inside
lithium battery.
2.8 Signal wire
Instrument signal wire consists of rebar sensor signal wire .Ports ofsignal wire are on the left of baffle.
2.9 U-disk
It is used to copy the testing data which saved in the detector into computer for further analysis.
2.10 Starting-up interface and Main menu
After switched on, the first interface is the starting-up interface as shown in figure3-1, the main menu has three options
of Rebar Test, Data output and Sys. Setup

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Output”
2.11Keyboard operation
Figure3-1
All the control operation are done through pressing keys in the keyboard panel.
◼【▲、▼ 、◄、►】is used to select option. While selecting one option, pressing the 【ENTER】to enter into
corresponding submenu.At the same time, 【▲、▼ 、◄、►】can change parameter and switch options.
◼The LCD backlight of detector is closing as default after power is on. The backlight can enhance the recognition
of LCD, allowing users to identify contents of display. After entering into main menu interface, pressing 【►】to
choose whether open or close backlight.
◼【ENTER】selects specific option
◼【SAVE】stores data and parameter.
◼【BACK】goes back to previous interface, 【MENU】goes back to main menu.
◼【】is power switch.
2.12 USB transmission
Plugging the U-disk attached with instrument into USB port of the left side paddle, and then selecting “Data Output”
then press【ENTER】it will show the figure 3-2
Attention: please do not unplug the U-disk during transmission lest errors are made during data transmission.
2.13 System setting
After entering into system setting interface as figure 3-3, displaying date and time dynamically. Users can modify
year, month, day, hour, minute, second of system clock. The clock is 24-hour hex. Users can check battery state at
the same time.
Running OK
Running……
Power UP…
Please insert U dish

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Main Menu
□General-scan
□Profile-scan
□Grid-scan
□Data Display
□Delete Data
figure 3-3
Operation method: Pressing【ENTER】to entering into state of modification, then pressing【◄】【, ►】to adjust cursor
to item needing modification. Pressing 【▲】,【▼】can increase or decrease by one. After modification, pressing
【SAVE】to store the set time and go back to main menu. If there is no need to change current time, please press
【BACK】or【MENU】to go back to main menu.
2.14 Introductions of rebar test
Rebar test is divided into General-scan, Profile-scan and Grid-scan. Press 【▲】and【▼】keys in main menu
interface as shown in figure 3-1B to choose Rebar Test and press【ENTER】to enter into rebar test main interface
as shown in figure 3-4.
Figure 3-4 Rebar test main menu
Blue: On
Lang: English
Date: 16-04-11
Time: 14-56-14
Battery

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Settings
□
□
□
□
□
□
□
□
Obj.No.
Dia.
Cover
Type
Corr.
000000
16 mm
25 mm
Floor
None
Minimum 00 mm
Start Scan
Choic sensor Large
0 1 2 3 4 5 6 7 8 9
A B C D E F G H I J
K LM N O P Q R S T
U v w x y z + - # /
Settings
□Obj.No. 000000
□Dia. 16 mm
□Cover 25 mm
□Type Floor
3.Rebar Test
3.1 General-scan
General-scan is the basic testing function of rebar test. The thickness of rebar cover and the diameter of rebar can
be measured precisely with this function.
After connecting the host and sensor with signal wire, press 【▲】and【▼】to shift to General-scan and press
【ENTER】to enter into the parameter setting interface (as shown in figure 3-7) of general scan, and cursor will
stay in the position Obj. No.
Attention: when entering into parameter setting interface, quantity of electricity will be tested. When it is too low,
tip of “lack of electricity, please charge” will be presented on the middle of interface and vocal warning requires
immediate charging, at that time, users should not continue parameter setting or tests, or data is easy to lost or
make error. It is better to exit from testing interface and go back to main menu, then shutdown, finally change
battery or charge.
3.1.1 Parameter setting
After entering interface in figure 3-5, pressing 【▲】,【▼】to select the parameter to be set, and 【ENTER】for
starting to set corresponding parameter. After all done, select Start Scan to enter testing interface or press
【MENU】to go back to the main menu.
Figure3-5 Parameter setting Figure 3-6 Object number setting
The definition of parameters and methods of setting are as following.
➢Object No.
Object No. is combined either by six digtals, or mixed group of letters and symbols. The default object No. is
000000. After rebooting, when entering into parameter setting interface, the last digit of last object No. (stored)

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pulsing one is the default object No. (the increasing order is based on soft keyboard order shown in figure3-6 until
last symbol “/” ). For example, if the last stored object is 300009, when reentering into parameter setting interface,
default object No. is 30000A.
In the figure 3-7 interface, pressing【▲】,【▼】to shift cursor to Obj. No, then press 【ENTER】to the interface
as figure 3-8, the cursor is below the first character of object No. and pressing【◄】,【►】adjusts cursor to any
character for modification .Then pressing 【▼】to display soft keyboard below, the cursor occurring in the upper
corner of the soft keyboard, to select input word by【▲】,【▼】,【◄】,【►】,and after pressing 【ENTER】,
it will occurs in the cursor position of object No., at the same time, cursor in object No. will automatically move
down to the next position and cursor in soft keyboard will disappear. If continuing change, please repeat the
operation above. After the completion of modification, pressing 【SAVE】key to store this No., then cursor in the
No. will disappear and will go back to parameter setting interface automatically.
➢Diameter of rebar
Setting diameter of tested rebar, the settable range is between 6 and 50mm, and the default value is the setting
value of previous stored object.
Pressing【▲】【, ▼】in figure 3-7 to shift cursor to Dia., then press【ENTER】to set the diameter, pressing【▲】
or【▼】key can increase or decrease by 1 rebar standard. Long time pressing of 【▲】or【▼】key can increase
or decrease the value consecutively. After it is done, pressing【SAVE】or【ENTER】for storage, cursor will
disappear and go back to parameter setting interface automatically.
➢Thickness design
Setting the thickness of tested concrete cover, settable range is 10-99mm; the default value is the set one of
previous stored object. Pressing【▲】,【▼】in figure 3-7 to shift cursor to Cover, then press 【ENTER】to set
the thickness of cover, pressing 【▲】or 【▼】for once can increase or decrease by one and long time pressing
of these two keys, the value increase or decrease consecutively. After it is done, pressing the 【SAVE】or
【ENTER】, cursor will disappear and go back to parameter setting interface as shown in figure 3-5.
➢Object type
The tested object type can be divided into 2, beam or floor. It is used for evaluation of excessiveness of tested
thickness value automatically.
Pressing【▲】,【▼】in figure 3-7 to shift cursor to Type, then press 【ENTER】to set the type, pressing 【▲】
and 【▼】for the shift. After it is done, pressing the 【SAVE】or 【ENTER】, cursor will disappear and go back
to parameter setting interface
➢Minimum thickness
Setting of the minimum thickness of cover allowed by tested rebar in quick check; range is 0-99mm, default value

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is 0mm. When using it(setting non-zero value), if cover thickness of tested rebar is below the set value, the
detector will warning danger, and do not present and store the tested thickness.
Pressing【▲】【,▼】in figure 3-7 to shift cursor to Minimum, then press【ENTER】to set the minimum thickness,
pressing 【▲】or 【▼】for once can increase or decrease by one and long time pressing of these two keys, the
value increase or decrease consecutively. After it is done, pressing the 【SAVE】or 【ENTER】, cursor will
disappear and go back to parameter setting interface as shown in figure 3-5.
Attention: When the minimum thickness is setting to 0, the warning alarm will be closed.
➢Data correction
In order to lower the effects for the measurement of cover thickness of tested rebar by adjacent abreast ones, it is
better to set center distance from adjacent rebar to tested rebar. The detector modifies test result automatically and
improve test accurately. It is divided into “Manual” and “None”. After starting, the default one is “None”—no
correction. While “Manual” means modifying based on center distance of adjacent rebars set manually and
displays the measured results after correction.
Pressing【▲】【,▼】in figure 3-7 to shift cursor to Corr., then press【ENTER】to set the correction mode, pressing
【▲】and 【▼】can achieve shift between “Manual”and “None”. If “Manual”is selected, inputable
option is present on the right side and the range is 50-110mm. Pressing 【►】key can move cursor to digit, and
【▲】or 【▼】for once can increase or decrease by one and long time pressing of these two keys, the value
increase or decrease consecutively. After it is done, pressing the【SAVE】or【ENTER】, cursor will disappear and
go back to parameter setting interface as shown in figure 3-5
Attention: To use this function does not completely remove the effects of adjacent rebar on tested result..
3.1.2 Test interface
In the figure3-7 interface, pressing【▲】【,
▼】to shift cursor to Start Scan, then press【ENTER】to the interface
as figure3-9. In the test interface, pressing【BACK】can go back to parameter setting interface in figure 3-7, while
pressing 【MENU】key, it will go back to main menu as shown in figure 3-1

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Figure 3-7Test interface of General-scan
3.1.2.1 Introduction of the interface
➢Scrollbar—show the relative distance between sensor and rebar.
Blank—no rebar in sensing range of sensor
Increase—sensor is moving towards rebar
Decrease—sensor is moving away from rebar
➢Signal value—the larger present sensor receiving signal amplitude, the closer to rebar.
➢Cur. Cover—the current thickness of cover, the equivalent distance (unit, mm) between sensor and
rebar, the larger the equivalent value, the farther it is. When equivalent value exceeding
measurement ranges of sensor, it is 0 and the minimum value of current thickness is the thickness
of cover. (If users used data correction, it only shows measurement value not corrected one)
➢Cover—display of measurement value (unit, mm) of thickness of concrete cover automatically (If
users used data correction, it shows the corrected value).
➢Dia. —display of measurement diameter of tested rebar (unit, mm). pressing 【▲】key for
measurement of diameter and thickness of cover (There is no need for the input of the diameter of
tested rebar), please see detail description in chapter 3.4.1.3. After testing the diameter, it will
display as follows:
Cover: ▶*** ( measurement of the thickness of cover of rebar)
Dia.: *** (measurement of rebar diameter)
➢Sav. Num—it is the stored amount of thickness of cover for present object.
➢Qualification rate—the rate of qualified points of all the stored thickness values in current object
according to the specification of GB50204-2002.

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➢Tip of excessiveness—when the tested thickness of cover exceeds the range of specification, a tip
will be presented “!”, or it will be blank.
➢Object No.—display of current object No.
➢Status information:
a) Range: ■ and □is used for first and second range.
b) Method of storage: “A” represents “automatic storage” while “M” represents “manual storage”;
c) Method of measurement: “≡” represents “dense rebar measurement” while blank represents
general measurement:
d) Method of correction: “C” represents correction while blank for no correction.
3.1.2.2 Hotkey function
In the test interface, there are following several functions operated and manipulated by hotkeys.
1) Choice of range--to select first range or second range. The first range is used for situations when the tested
thickness of cover is relative small, the second range is used for relative large situations, represented by ■
and □respectively.
In the test interface shown in figure3-7, pressing【►】for shift the range, and shown ■or □in status bar.
Every time entering into this interface, the default one is the first.
2) Method of storage—to select the method of storage of tested result. It is divided into 2 types—“automatic”
and “manual” marked with “A” and “M” respectively.
Manual storage —only when pressing 【SAVE】key, instrument will store the measurement value of
thickness of cover and rebar diameter.
Automatic storage—the instrument will store the tested result of thickness of cover automatically into current
object. In the test interface shown in figure3-9, pressing 【►】for shift and shows “A”or “M”in status
bar. Every time entering into this interface, the default one is manual storage
3) Method of measurement—the method of measurement is divided into “general measurement”and “dense
rebar measurement”represented with blank or“≡”. In the test interface shown in figure3-9, pressing【►】
for shift and shows blank or “≡” in status bar. Every time entering into this interface, the default one is
general measurement.
3.1.3 Measurement steps
3.1.3.1 Resetting

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Method 1.
In the parameter setting interface (figure3-5), please hold sensor in the air and away from ferromagnet. After
selecting “ Start Scan” option, it will enter into test interface as shown in figure 3-7 and the instrument will reset
automatically—after nearly 4 seconds , screen of test interface will show the present thickness is “0”，then
resetting is over waiting for measurement.
Method 2.
In the test interface as shown in figure3-7, please hold sensor in the air and away from ferromagnet. After pressing
【ENTER】, the instrument will reset automatically and the present thickness will show in blank. After nearly 4
seconds, screen of test interface willshow the present thickness is “0”，then resetting is over waiting for
measurement.
Attention: 1) In the detection process, a reset operation should be done about every 10 minutes.
2) While doubt on the measurement data, measure again after resetting.
3.1.3.2 Identify the direction of rebar and thickness of cover
Just as shown in figure3-10, placing sensor on the surface of tested concrete and paralleling with tested rebar, then
moving sensor along a direction in a uniform speed, when sensor going towards rebar, scrollbar will be lengthen and
the signal value will become larger and larger , current thickness value is decreasing(figure 3-11(A)); when the sensor
going over rebar , the thickness value of cover will be locked automatically( figure 3-11(B)). If the method of storage is
set in “automatic storage”, instrument will store the thickness of cover automatically and the storage amount will
increase by 1 automatically at the same time. If it is set in“manual storage”, after instrument locking the thickness of
cover, pressing the 【SAVE】key, the value will be stored and the amount will increase by one. When the sensor goes
over rebar, the buzzer will alarm.

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Figure 3-11 general test interface
If you want to identify the rebar’s location and direction precisely, please operate as follows:
⚫Moving sensor in a reverse direction and identifying the location of minimum current thickness value, then
equaling the current value with thickness of cover, therefore, the position of sensor is where the rebar is in
(figure3-11(C)).
⚫Rotating the sensor and making the signal in maximum state. At that time, the direction of sensor is the direction
of tested rebar.(figure3-11(D))
3.1.3.3 Measurement of rebar diameter
1) Resetting sensor in accordance with the method 2.
2) Identifying rebar’s location and direction precisely.
3) Placing the sensor above the tested rebar and paralleled with it. Pressing 【▲】key, after about 2
seconds, the tested result of diameter will be directly shown in the position of “Dia”. The instrument
will measure the thickness of cover simultaneously shown in “Cover”in figure 3-12. Under the mode
of automatic storage, it will store diameter value and thickness of cover automatically and the storage
amount increase by 1. Under the mode of manual storage, if pressing 【SAVE】, it will store diameter
and thickness of cover and the storage amount increase by 1.

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3.2 Grid-scan
Grid-scan mainly displays the distribution of grid-distributed rebar through grid diagram, and display the location
of rebar and the thickness of cover at the same time.
Firstly, connecting the host and the sensor with signal wire, then pressing 【▲】and【▼】keys in main menu
interface as shown in figure 3-6, shifting ■to “Grid-scan”and pressing 【ENTER】for scanning, parameter
setting interface will be presented in figure3-13 and parameter can be set. Then, detector firstly test the quantity of
electricity (please see test of quantity of electricity in “General-scan”).
3.1.4 Parameter setting
The default values of all parameters are the set ones of previous stored object. The setting method is the same with
3.6.1 pressing 【▲】and【▼】keys to shift ■to options for setting, and pressing 【ENTER】for selection,
pressing 【▲】and【▼】keys for modification and shifting and finally pressing 【SAVE】to store the set value
and exit from it.
➢Dia. X—the diameter of awaiting measuring rebar in X direction and the setting range is 6～50mm, the
default value is the set one of previous stored object.
➢Dia.Y—the diameter of awaiting measuring rebar in Y direction and the setting range is 6～50mm.
➢Cover X—the thickness of cover of awaiting measuring rebar in X direction and the setting range is 10～
99mm.
➢Cover Y—the thickness of cover of awaiting measuring rebar in Y direction and the setting range is 10～
99mm.
➢Correction—to set method of correction It is divided into two types—automatic and none, the default one
after starting up is none. automatic means that instrument will correct automatically in accordance with
testing thickness of cover and rebar space. When entering the grid-scan interface next time, the default
method is the previous set one.

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Selecting “Start Scan” in parameter setting interface, the set values will be stored, and then enters into testing
interface as shown in figure 3-14.
Attention: while pressing【ENTER】, please hold sensor in the air and get away from ferromagnet. If pressing 【BACK】
key in testing interface, it can go back to parameter setting as shown in figure3-13 and can reset parameters.
Figure 3-14 Grid-scan
The contents and definitions in the interface in figure 3-14 are as follows:
➢Scrollbar—show the relative distance between sensor and rebar, the digit in scrollbar displays the current
thickness of cover, a little difference compared with data of general scan.
Blank—no rebar in sensing range of sensor
Increase—sensor is moving towards rebar
Decrease—sensor is moving away from rebar
➢Coordinate on the top left
Figure 3-15 Superscripts of grid scan
The measurable length of X and Y is 1 meter in one screen, if more than 1 meter, then flip the page and the page
number should increase by one. Rebar displacement in each screen is the coordinate within this screen (1m), cm is the
indexing. If a rebar is identified in X direction when scanned for 2.6 meters, the result will be x02, the coordinate of
the rebar is 60 cm.
➢Direction—it shows the scanning direction of sensor,“→”,“↓”represents X direction and Y direction scanning
respectively. In the left bottom, it shows the object No. and the set rebar diameter in current direction.

ZBL-R630A Rebar Detector
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In the status bar, it shows range, storage method, measurement method, correction setting etc. In the grid-scan,
user can select range and method of measurement, please see in general scan for related contents. There are only
two points –different with general scan.
1) The grid-scan method only has automatic storage, that is “A”.
2) “C” represents data correction automatically.
3.1.5 Resetting
Method 1. In the parameter setting interface(in figure 3-13), please hold sensor in the air and away from ferromagnet.
After selecting “Start Scan” option, it will enter into test interface as shown in figure 3-14 and the instrument will reset
automatically—after nearly 4 seconds , screen of test interface will show the present thickness is “0”，then resetting is
over waiting for measurement.
Method 2. In the test interface as shown in figure3-14, please holds sensor in the air and away from ferromagnet.
After pressing 【ENTER】, the instrument will reset automatically and the present thickness will show in blank. After
nearly 4 seconds, screen of test interface will show the present thickness is “0”，then resetting is over waiting for
measurement.
3.1.5.1 Pre-scanning
When entering into interface in figure 3-14, after resetting, instrument can pre-scan. The purpose of pre-scanning is to
identify the direction of measuring line and the starting point through initial scanning of distribution of rebar in X and
Y direction. Instrument can measure location of tested rebar in the measuring interface as shown in figure3-14. When
relative position between sensor and tested rebar has changed, current thickness of cover will be shown in the scrollbar.
When sensor goes above the tested rebar, instrument will produce short beep, but there is no drawing of rebar and the
tested data is not stored.
Just as shown in figure3-16, firstly in the scheduled scanning start area, identifies location of 2 or 3 rebars in X
direction through the above method, then identifies location of 2 or 3 rebars in the direction of Y. The center of crossed
area (just shown “0”point in figure3-16) in X and Y direction of first and second rebar can used as the starting point of
scanning.
3.1.5.2 Selecting the test direction
Before scanning, the test direction for X or Y should be firstly selected.

ZBL-R630A Rebar Detector
Dahecinst
[email protected]
[email protected]
[phone]
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Pressing 【▲】key in the interface as shown in figure 3-14 for the shift of X and Y direction, “→”or “↓”occurs
in the bottom right , at the same time, in the status bar, default diameter will change into default diameter in X or Y
direction in accordance with change of direction, please see in figure 3-17, 3-18 and 3-19.
3.1.5.3 Grid scanning
If it is X direction at first, the sensor is placed in the zero position determined in pre-scanning(the starting point in
figure 3-16) and paralleled with tested rebar of Y direction.
Pressing 【SAVE】key, a square cursor (hereafter referred to as sensor cursor) occurs, showing the present displacement
of sensor(the displacement is relative one compared with coordinate points in this page). then, scanning can be started
in X direction shown in figure3-17.
Moving sensor in a uniform speed, when the senor is closer with rebar, scrollbar will lengthen gradually; the current
thickness value in the upper right will decrease accordingly. When sensor goes over rebar, peep alarming, the tested
rebar will be displayed in coordinate (shown in pachytene in figure3-17).Thickness value of cover and coordinates of
tested rebar (the distance between rebar and the starting point , unit :cm) will be displayed in the upper side of rebar
and the tested result will be stored simultaneously
At the same time, when sensor continues moving forward, instrument will measure the tested rebar consecutively; the
tested rebar and the tested data will be shown in corresponding position of coordinate.