KEHUI T-506 User manual

T-506 Cable Fault Pinpointer
User Manual
Version 3.2
Kehui International Ltd
206 Mill Studio Business Centre
Crane Mead, Ware
Hertfordshire, UK, SG12 9PY
Phone: [phone]
Fax: [phone]
Website: http://kehui.com

T-506 User Manual Version 3.2 | 2
Legal Notices
The copyright of this material belongs to Kehui International Ltd. No company or individual may
extract, copy or translate in any way without the written permission of the copyright owner.
Copyright infringement will be investigated.
This product complies with the design requirements for environmental protection and personal
safety.
This product is a professional instrument specially designed for power cable faults. Please do not use
it for any other purpose. The company assumes no responsibility or loss if it is used for other
purposes.
The safety regulations in this user manual should be strictly adhered to.
The storage, use and disposal of the product should be in accordance with the product manual,
relevant contracts or relevant laws and regulations.
As part of Kehui’s continual product development this product is subject to design or technical
changes without prior notice. When product improvement or technical changes occur, you can check
the information through Kehui International Ltd. website http://www.kehui.com.
Disclaimer: Every effort has been made to make this material complete, accurate, and up-to-date. In
addition, changes are periodically added to the information herein; these changes will be
incorporated into new editions of the publication. Kehui International Ltd reserves the right to make
improvements and/or changes to the product(s) and/or the program(s) described in this document
without notice, and shall not be responsible for any damages, including but not limited to
consequential damages, caused by reliance on the material presented, including but not limited to
typographical errors.
NOTE: Windows is a registered trademark of Microsoft.
Revision history:
Data version
Revision date
Revision reason
Person
V2.1
2019.03
Major update to
original
Gong Elvics
V2.2
2019.03.24
New format, major edit
DiaKib
V2.3
2019.04.01
New Pack List added
and minor corrections.
EilKwo
V2.4
2019.12.12
Major edit (all sections)
inc. new tablet PC
BilKib
V3.0
2019.12.20
Final edit and issue
DiaKib
V3.1
2020.01.07
Update new tablet pc
and battery connection
BilKib
V3.2
2020.06.03
Minor rewording
BilKib
Document number: T506_V3.2_UM_EN

T-506 User Manual Version 3.2 | 3
Foreword
Thank you for purchasing the T-506 Intelligent Cable Fault Pinpointing Device (hereinafter
referred to as T-506)
The T-506 is a high-performance cable fault detection instrument. The soundproof cover
with professional acoustic design can significantly reduce the influence of environmental
noise, and improve the sensitivity of sound detection even in noisy environments.
Using signal real-time wireless transmission technology (Bluetooth), the tablet APP interface
is convenient and easy to use on site. Its human body proximity sensing technology provides
added protection for the user's hearing. Automatic cable fault location is facilitated using
Kehui's proprietary acoustic and magnetic signal synchronous display and intelligent
processing technology.
T-506 is a complementary product to Kehui’s T-30X series High Voltage Surge Generator, T-
90X series Power Cable Locator, T-1X00 series Cable Fault Test Van.
Kehui constantly improves its products, and the individual instruments provided may differ
from the instructions in this manual without prior notice. We are always at your service if
you have any queries or should you require further information.

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Manual Objective
This user manual is the basic commissioning and on-site operation guide for the company's T-506.
Users of the T-506 should read the entire contents of this manual in advance. If necessary, please
contact us at [e-mail] for further guidance.
This manual is mainly written for the first-line staff engaged in power cable fault repair, and can
provide reference for the work of electrical technical engineers.
Manual Composition
This manual is mainly composed of two parts: the technical parameters of the product and the
specific operation of the instrument.
Manual Agreement
This manual follows the following conventions:
1. All titles are in bold type.
2. If the title is followed by the words ‘conditions’, it means that the content required under the
heading is required under certain conditions.
[Note] means that the reader should pay attention to those matters highlighted.
[Warning] means that it is vital that the reader pays particular attention to that topic, otherwise it
could cause serious errors or compromise safety.

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Table of Contents
1. SAFETY INSTRUCTIONS..............................................................................................................6
2. PRODUCT OVERVIEW..................................................................................................................7
2.1 Product features........................................................................................................................7
2.2 Scope of application...................................................................................................................7
2.3 Product nomenclature ...............................................................................................................8
2.4 Environmental conditions...........................................................................................................8
2.5 Standard Configuration ..............................................................................................................8
2.6 Technical Data Sheet..................................................................................................................9
2.7 Instrument Structure ...............................................................................................................10
3. WORKING BACKGROUND, PRINCIPLE.....................................................................................10
3.1 Working background................................................................................................................10
3.2 Working principle ....................................................................................................................11
4. INSTALLATION AND ADJUSTMENT...........................................................................................12
4.1 Battery Connection ..................................................................................................................12
4.2 Install Probe ............................................................................................................................13
4.3 Installation and adjustment of the handle..................................................................................14
5. PREPARATION BEFORE USE ....................................................................................................16
5.1 Turning on the Tablet PC ..........................................................................................................16
5.2 Turning on the Detector ...........................................................................................................18
5.3 Bluetooth Connection ..............................................................................................................18
5.4 Launch APP .............................................................................................................................19
5.5 Operation Interface .................................................................................................................20
5.6 Button and Area function introduction ......................................................................................21
6. GETTING STARTED ....................................................................................................................25
6.1 Determine cable path...............................................................................................................25
6.2 Looking for fault discharge .......................................................................................................26
6.3 Closing in on the fault ..............................................................................................................27
6.4 Initiate remote assistance ........................................................................................................30
6.5Instrument shutdown ..............................................................................................................30
7. TRANSPORTATION, STORAGE AND CHARGING ....................................................................30
7.1 Transportation considerations ..................................................................................................30
7.2 Storage conditions, storage period and precautions ...................................................................30
8. INSTRUMENT CHARGING ..........................................................................................................31
9. UNPACKING AND INSPECTION.................................................................................................31
10. MAINTENANCE AND TROUBLESHOOTING...........................................................................31
10.1 Daily maintenance ...................................................................................................................31
10.2 Simple problem handling..........................................................................................................32
11. PACKING LIST –T-506.............................................................................................................33

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1. Safety Instructions
Safety Note:
This user manual is the basic commissioning and on-site operation guide for
the T-506 Smart Cable Fault Pinpointer. All operators of the T-506 should read
the contents of this manual in advance. The manufacturer of this product is
not responsible for any loss caused by the operator's failure to comply with the
operating procedures of this manual or for violation of the safe working
procedures of the operator.
Meaning of the
manual symbols
Important instructions concerning personal safety, operating procedures,
technical safety, etc., are marked with the following symbols:
Symbol
Meaning
Indicates a potential hazard that could result in
serious or fatal injury
Indicates a potential hazard which, if not avoided,
may result in minor personal injury or property
damage.
Indicates that it contains important information and
useful guidance for using this product. Failure to
heed this information may result in the test not
functioning properly.
Indicates that this is a useful guideline based on field
practice.
Use of
accessories:
Please be sure to use Kehui’s spare parts to ensure the safe and reliable use
of this instrument. Using accessories made by other companies will make any
warranty null and void.
Repair and
maintenance:
This instrument must be repaired and maintained by Kehui or an agent
authorised by Kehui. If you have any questions concerning maintenance,
cable fault detection, on-site test consultation, etc., please contact the
company at [email protected].

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2. Product Overview
2.1 Product features
The product has the following characteristics:
1. Vibration detector with sound enclosure for a quieter monitoring background.
2. Wireless data transmission, removing the need for a physical connection between the
detector and the Operator interface (tablet), making the fault location is easier.
3. The Operator interface of the tablet mobile PC uses touch-screen operation, to enhance
the user experience.
4. The sound and magnetic field signals are displayed synchronously, to ensure the
accuracy of the fault location.
5. Using intelligent identification technology, cable fault position is automatically
identified.
6. Human proximity sensing technology, automatically mutes the sound to protect
hearing.
7. Four types of sound filtering modes can be set to improve the sound detection.
8. Convenient adjustable handle height.
9. Variety of probes to meet different ground detection requirements.
2.2 Scope of application
T-506 is an intelligent cable fault pinpointing device that integrates high-performance
acoustic and magnetic signal detection sensors, a tablet mobile PC interactive interface, real-
time wireless data transmission technology, portable design and artificial intelligence.
Using a DC high-voltage surge generator, magnetic field and sound signals are generated as
the surge of energy through the cable causes the fault to break down. The waveforms
relating to these signals are synchronously acquired and displayed. Through the use of
intelligent algorithm processing the distance to the fault can be calculated.

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2.3 Product nomenclature
Product model naming method:
T–5 06 □
Revised design code ABCD
Design Number
Power cable fault pointing device
Fault detection
2.4 Environmental conditions
1. Working environment temperature: -10 to 50°C
2. Working environment humidity: at 40°C 20% to 90% RH
3. Storage environment temperature: -20 to 50°C
2.5 Standard Configuration
1. One T-506 detector with a dedicated charger.
2. One T-506 tablet PC, including one charger adapter and one data cable.
3. One plate holder with shoulder strap and belt (combined with tablet PC assembly).
4. One T-506 handle (height adjustable).
5. One set of headphones.
6. One hard ground probe, 20mm long (suitable for smooth contact surfaces to ensure
stable probe contact).
7. One grass probe, 75mm long (suitable for thicker soft ground, such as grass, beach,
etc.).
8. A user manual.

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2.6 Technical Data Sheet
Parameter
Parameter Value
Fault fixed point accuracy
≤0.2m
Detector dynamic range
•Sound channel
•Magnetic field channel
>110dB
>110dB
Operating frequency range
•Sound channel
•Magnetic field channel
100Hz—1500Hz
160Hz—50000Hz
Sound channel filter
•No filtering
•Low-pass filtering
•Bandpass filtering
•High-pass filtering
100Hz—1500Hz
100Hz—400Hz
150Hz—600Hz
200Hz—1500Hz
Power supply
•Detector
•Tablet PC
Lithium battery 2200mAh
Lithium polymer battery 2x 2600mAh
Charging
•Detector
•Protection level
•Tablet PC
Input: 100-240V - 50/60Hz
Output: 8.4V/1.0A
Class II
Input: 100-240V - 50/60Hz
Output: 5.0V/2A
On-site continuous working hours
•Detector
＞12h
Weight
•Detector
•Tablet PC
2.0kg (with handle)
1.2kg (including harness)
Volume
•Detector
230mm x 160mm (diameter x height)
Waterproof and dustproof
•Detector
•Tablet PC
IP65
IP655

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2.7 Instrument Structure
1. Detector
2. Adjustable handle
3. Charger Socket
4. Detector trigger indicator
5. On/off button
3. Working background, principle
3.1 Working background
To locate cable faults, the T-506 needs to be used with a DC High Voltage Surge Generator.
In the field, the discharge cycle and discharge voltage of the surge generator are adjusted as
required, and a discharge signal is applied to the faulty cable. For cables of different voltage
levels, the highest surge voltage allowable will vary. The maximum surge voltage level should
be limited to that specified for the particular cable under test to avoid damage.
In addition to being able to work with the Kehui T-30X series DC high voltage surge
generator and T-1X00 series cable test van, the T-506 can also operate with equipment from
other manufacturers.
[Warning] When you use the DC high voltage surge generator, be sure to follow the
appropriate safety procedures and strictly follow the requirements of the DC High Voltage
Surge Generator User Manual.
3
4
5
6
7
8
6. Power indicator
7. Bluetooth connected indicator
8. Handle socket
9. Tablet and harness
10. Headphones
10
9

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3.2 Working principle
3.2.1 Acoustic magnetic synchronisation
A high-voltage impulse signal is applied to the faulty cable by the high voltage surge
generator, and the current flows along the cable to induce a magnetic field. At the same
time, the fault breakdown discharge generates a sound signal that propagates outward from
the fault point. The T-506 detector on the surface is triggered by the magnetic field and
synchronously measures the magnetic and acoustic signals.
Due to the difference in the propagation speed of the magnetic and acoustic signals, there is
a time difference between the two signals reaching the Detector. The further the detector is
from the fault, the greater the time difference and conversely the time difference reduced
the closer the Detector is to the fault. When the Detector is directly above the fault, the time
difference is at its smallest. Using this approach, the exact position of the fault can be found
by repeatedly moving the Detector along the section of the cable route defined by the pre-
locator. This method of finding the cable fault of the T-506 is called the acoustic-magnetic
synchronisation method, and its principle is shown in the figure below.
3.2.2 Sound intelligent recognition technology
The T-506 is a smart cable fault detection instrument that utilises advanced artificial
intelligence (AI) algorithms. The programme algorithm has been refined based on the data
from a very large number of actual faults and has the ability to automatically identify fault
discharge sounds. In the process of finding the fault point, when the T-506 intelligent
algorithm recognises the fault discharge sound, it will give corresponding prompts on the
APP interface, so that the user can find the cable fault point more easily.
3.2.3 Proximity sensing technology
The T-506 can sense a person’s touch. When a human hand touches the metal part of the
T-506 handle, the unit will automatically cut off the transmission of the sound signal to avoid
the strong vibration caused by touching the instrument and stops its transmission to the
headphones. When the user removes the hand from the handle, after a period of delay, the
T-506 automatically resumes the transmission of the sound signal.

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Battery lead socket
3.2.4 Filter mode setting technique
The T-506 uses a high-performance microprocessor and digital signal processor (DSP) to
process the acquired sound and magnetic field signals in real time and perform continuous
digital filtering operations.
During use, the user can select low pass, band pass, high pass or all pass filter modes
according to the test environment and conditions, in order to get better discharge sound
detection effect. The appropriate filtering mode will filter out noise or interference outside
the passband while receiving the cable fault discharge sound. This improves the signal-to-
noise ratio of the fault discharge sound.
The T-506 can sense a person’s touch. When a human hand touches the metal part of the T-
506 handle, the unit will automatically cut off the transmission of the sound signal to avoid
the strong vibration caused by touching the instrument and stops its transmission to the
headphones. When the user removes the hand from the handle, after a period of delay, the
T-506 automatically resumes the transmission of the sound signal.
4. Installation and adjustment
4.1 Battery Connection
Due to airline regulations, the unit is often shipped with the battery disconnected. When the
unit is first unpacked, plug the charger into a suitable power outlet and insert it in to the
charger socket on the detector (section 2.7). Press the on/off button. If the unit’s Power light
does not illuminate, it is probable that the battery is disconnected.
Remove the handle and turn the Detector over. Look at the underside of the Detector as
below and, using a cross-head screwdriver, remove the 9 screws (position shown by the
orange line) on the bottom of the detector.
Note these screws are quite small, it is recommended that they are kept in a suitable
container to ensure they are not lost.
Lift up the yellow cover of the detector and plug the battery cable in to the socket marked in the
photograph above (right). If the cover is difficult to lift, try to rotate it a little.
Screws to remove

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Replace the cover on to the bottom part, ensuring that the top and bottom parts are aligned, as
marked with arrows in the photos.
Finally, replace the screws and charge the battery. The unit should then be operational.
4.2 Install Probe
Unpack and remove the T-506 detector and connect the probe as shown below. Depending
on the nature of the ground environment (hard or soft), choose the appropriate probe.
① Detector ②Hard ground probe ③Soft ground probe

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4.3 Installation and adjustment of the handle
Unpack and remove the T-506 handle and connect it to the main unit as shown below. First,
align the lower end of the handle with the upper lever connector of the main unit as shown
in Figure (a) (note the alignment of the lower opening of the handle and the connecting rod
in the lever base). Then, insert the handle firmly into the connector as shown in Figure (b).
Finally, rotate it 45 degrees clockwise to complete the assembly.
1) Probe 2) Handle connector 3) Handle top 4) Handle shaft 5) Locking Knob
After the handle shaft and the main assembly are completed, adjust the height of the handle
bar according to the height and usage habits of the staff - turn the locking knob
counterclockwise, loosen the fastening connection of the handle bar and the handle tube,
and then adjust the handle The height of the rod is at a suitable position, and finally the
knob is rotated clockwise to fix the handle bar and the handle tube.

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4.3.1 Tablet preparation
Fully charge the tablet using the charger supplied (do not use any other charger for this
purpose).
For ease of use the tablet PC can be used with the supplied harness, neck strap and belt
which can be adjusted to suit the user. The initial use of the T-506 requires the assembly of
the tablet and tablet stand. The tablet should be inserted into the harness as shown below.
For hands-free ease of use, the tablet can be supported in front of the body (see below).
1. Neck Strap 1 should be clipped to the top two rings on the tablet cover and hung
around the neck with its length adjusted, so that the tablet PC hangs at a comfortable
height.
2. Neck Strap 2 should be clipped to the bottom two rings the tablet PC, enabling it to be
viewed when looking down. The strap should be tightened to achieve the correct
viewing angle.
3. The headphones to hear the acoustic signal from the detector.
4. The headphones plug is inserted in to the socket on the right-hand side of the tablet,
having first opened the protective cover.
5. The tablet cover can be fastened across the screen to protect it when not in use.
.
Headphones socket
Charging socket
Protective cover
1 Neck Strap 1 2 Neck Strap 2 3 Headphones 4 Headphones Plug 5 Tablet Cover
1
2

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5. Preparation before use
The following steps should be taken to begin using the T-506 detector and the tablet APP.
5.1 Turning on the Tablet PC
•Turn on the unit by pressing the “on” button for several seconds (below (i)).
i)
•This should result in the screen shown in (ii). Do not touch the screen until
advised below.
ii)
•This screen will remain for about 30s while the unit boots-up. It will then
automatically change to (iii) with the “Handheld” logo swiping across the screen.
After a few seconds it will stabilise and then change to the screen shown in (iv)
iii)

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iv)
•When this screen appears, put your finger at the bottom of the screen and swipe
upwards, the screen should change to (v)
v)
•Put in the PIN number (initially 1234) using the touch screen and press ✓, the
screen changes to (vi), with the Kehui 506 APP highlighted.
vi)

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•Touch the Kehui symbol and the APP will open (vii). If the Kehui symbol is not
there, swipe the screen left or right, as it may be on a different page.
vii)
5.2 Turning on the Detector
The detector power can be turned on or off by pressing the power on/off button on
the detector. The detector power indicator lights up when the detector is turned on.
[Warning] The battery must be charged using the dedicated charger. Using other chargers
that do not meet the exact parameters, may cause damage to the instrument.
5.3 Bluetooth Connection
With the detector and tablet PC powered on, click the device name T-506 in the pop-up
pairing dialogue box, enter the T-506 detector default PIN code 1234, then click OK to
complete the Bluetooth pairing and connection of the tablet and detector. Once the
Bluetooth connection is successful, you should exit to the tablet desktop interface. The
operation interface is as follows:
[Note] This step only needs to be performed once. After the device is successfully paired, it
is not necessary to repeat this operation. However, the pin number will be required to
access the tablet after a period of inactivity.

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5.4 Launch APP
After clicking the T-506 APP icon on the desktop, the user will see the APP start-up
screen as shown in the figure below.
Click the ‘Start’ button to enter the device selection interface and select the paired T-506
device. The operation interface is as follows;
[Note] The device selection interface will only pop up when the app is running for the first
time. After the first use it will directly enter the operation interface of the APP.

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5.5 Operation Interface
In order to meet the different needs of users during field tests, two different operating
interfaces are available in the APP - ‘operator mode’and ‘waveform mode’.
5.5.1 Operator Mode
In this mode you can observe the test results more intuitively.
5.5.2 Waveform Mode
In this mode you can analyse the magnetic field and acoustic waveform characteristics in
real time
[Note 1] After entering the operation interface, the Bluetooth indicator of the detector
shines bright blue, which means that there is communication between the tablet PC and the
detector.
[Note 2] The default operation interface of the APP is ‘Waveform’mode. To switch to the
‘Operator’ mode, click the mode switch button in the lower right-hand corner.