HWM Touch Pro Series User manual

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User Guide: Touch Pro series correlators.
(Touch Pro, Touch Pro TM, Tri-Corr Touch).
Warning: This manual contains important safety and operating information.
Please read, understand, and follow the instructions in the manual
and also any safety / approvals documents shipped with the device.
MAN-068-0001-L April 2022.

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TABLE OF CONTENTS
1Introduction and preparation for use .............................................................................5
1.1 Documentation and Support of Product .................................................................5
1.2 Safety Considerations................................................................................................7
1.3 Operating Temperature ............................................................................................8
1.4 Battery Installation and Charging.............................................................................8
1.4.1 Base Unit –Battery pack installation ................................................................8
1.4.2 Outstation Units –Battery pack installation.....................................................9
1.4.3 Battery charging and storage ............................................................................9
2Overview ..........................................................................................................................10
2.1 Introduction..............................................................................................................10
2.2 The Correlation Principle.........................................................................................11
2.3 System Overview......................................................................................................12
2.3.1 Accelerometer sensors ....................................................................................13
2.3.2 Hydrophone-2 sensors.....................................................................................14
2.3.3 Base Unit ...........................................................................................................15
2.3.4 Outstations........................................................................................................16
2.3.5 Headphones......................................................................................................17
2.3.6 Charging case....................................................................................................18
2.4 Optional equipment ................................................................................................20
2.4.1 Vehicle mounted aerials...................................................................................20
2.4.2 Hydrophone-2 (sensor kit) ...............................................................................20
2.4.3 Hydrophone Thread adapters.........................................................................21
2.5 Operating ranges (Accelerometer & Hydrophone) ...............................................21
2.6 Installation of Accelerometer Sensor .....................................................................22
2.7 Installation of Hydrophone Sensor ........................................................................23
2.8 The Hydrophone 2 kit (Hydrophone pair and carry-case)....................................25
3Equipment: Connectors, controls, indicators, deployment .........................................27
3.1 Base unit –Connecting up and Switching on ........................................................27
3.2 Outstation units .......................................................................................................28
3.2.1 Connecting up...................................................................................................28
3.2.2 Switching on / Setting the Transmit Power ....................................................28
3.2.3 Deployment.......................................................................................................28
3.2.4 LEDs –operation and meaning: ......................................................................29

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4Base unit operation.........................................................................................................30
4.1 Introduction..............................................................................................................30
4.2 Language selection ..................................................................................................31
4.3 Main screen (a quick tour).......................................................................................32
4.4Selection of sensor inputs.......................................................................................38
5Survey mode (quickly check for leaks)...........................................................................39
5.1 Operation .................................................................................................................39
5.2 Settings for Survey Mode (range and filters) .........................................................40
6Using Headphones..........................................................................................................41
7Correlation (leak localisation).........................................................................................43
7.1 Correlation using the Touch Pro.............................................................................43
7.2 Tools to assist correlation .......................................................................................50
7.2.1 Zoom feature ....................................................................................................50
7.2.2 Auto-Cursor feature .........................................................................................51
7.2.3 Peak Suppress feature .....................................................................................52
7.2.4 AFIS (Filter Optimization) feature ....................................................................54
7.2.5 Filter Settings –Manual Adjustment ...............................................................56
7.3 File functions: Saving and re-opening a correlation .............................................60
7.3.1 Saving a Correlation Result..............................................................................61
7.3.2 Opening a Previously Saved Correlation Result.............................................62
7.4 Compute Mode –Improving leak location accuracy.............................................63
7.4.1 Purpose /Overview ...........................................................................................63
7.4.2 Using Compute mode ......................................................................................64
7.4.3 Understanding the Data Produced from a Computation .............................68
8Material Database (Edit / define pipe materials) ..........................................................69
9Multi-graph modes..........................................................................................................71
9.1 Correlation Display (1 Histogram / 3 Histogram) ..................................................71
9.2 Snapshot Options (Graph Copy).............................................................................75
10 Velocity Calculation (sound speed calculator tool) ...................................................77
10.1 Out-of-bracket calculations.....................................................................................78
10.2 In-bracket calculations.............................................................................................78
10.3 Using the velocity calculation result.......................................................................79
11 Status and Setting options..........................................................................................80
11.1 Setting the Date and Time.......................................................................................80
11.2 Displaying the Software version .............................................................................80

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11.3 Displaying Radio details and battery information ................................................81
11.4 Setting Units of measure.........................................................................................82
11.5 Setting Correlation Technique (Time or Frequency Domain)...............................82
11.6 Sharpness Settings ..................................................................................................83
12 Troubleshooting ..........................................................................................................84
13 Maintenance, Service and Repair...............................................................................89
13.1 Routine care and maintenance...............................................................................89
13.2 Replaceable parts ....................................................................................................91
13.3 Return of product for Service or Repair.................................................................92
13.4 Upgrading the Outstation Firmware ......................................................................92
14 APPENDIX 1 … The Principles of Leak Location Using Noise Correlation ..............93

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1INTRODUCTION AND PREPARATION FOR USE
Thank you for choosing a HWM system. We trust it will provide you with many years of
service.
The Touch Pro series are correlator systems. They are designed to detect leaks within a
pressurised water pipe network. More precisely, they are used for detecting the most
probable location of a water leak. (i.e., To pin-point the leak location).
1.1 DOCUMENTATION AND SUPPORT OF PRODUCT
This user-guide covers the following model families:
Model Number(s) Description
MCT - * Touch Pro correlator system
HYDKITMCT * Hydrophone kit (for correlators)
S16S / 1 / * Hydrophone 2 sensor.
This includes the following systems:
•Touch Pro
•Touch Pro TM
•Tri-Corr Touch.
This user guide gives detailed information for the use of the correlator system to
pinpoint the most probable location of a water-leak from a pressurised water pipe.
The user guide covers use of various parts of the system and its sensor options.
The user-guide should be read in conjunction with the user-guide(s) of the equipment it
is being used with. Read any Safety Warnings and Approvals Information supplied.
For use with the Hydrophone 2 sensors, also read any appropriate sections of:
•MAN-165-0001 User-Guide –Hydrophone 2.
Note: HWM periodically updates software to include new features and any required
changes, thus you may observe slight changes from the diagrams and features
shown in this manual.
HWM provides support by means of our customer support webpages:
https://www.hwmglobal.com/help-and-downloads/
Should you have any questions that are not covered by this manual or the system’s
online help, please contact the HWM Technical Support team on [phone],
or email [e-mail]

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Acknowledgements:
USB interface:
The Outstation USB driver, although developed and tested by HWM-Water, is based on
code examples generated by Atmel Corporation. To satisfy Atmel copyright licensing
requirements, HWM-Water must display the following Atmel disclaimer:
Copyright (c) 2007, Atmel Corporation All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are
permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of
conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of
conditions and the following disclaimer in the documentation and/or other materials
provided with the distribution.
3. The name of ATMEL may not be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY ATMEL “AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR ;
SERVICES LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY USE OF OUT
OF THE THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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1.2 SAFETY CONSIDERATIONS
Safety Note:
Before continuing, carefully read and follow the information in the “Safety Warnings
and Approvals Information” document supplied with the product.
This provides general safety information.
Safety Procedures:
Working with water and other fluids under pressure can be hazardous. Recommended
safety procedures for working conditions must be followed at all times, and operational
procedures described in this manual should not take precedence over local safe
working practices or company procedures. If in doubt, ask your local safety officer.
The use of Touch Pro equipment Hydrophone 2 sensor option with the water supply is
subject to the hygiene procedures applicable to any objects coming into contact with
drinking water supplies. Hydrophone sensors and adaptors should be appropriately
sterilised prior to use and applicable procedures should be followed during their
installation.
Use of Touch Pro with other liquids or gases should follow national and company safety
procedures for operation in proximity with these substances.
DO NOT use your hands for installing the sensors in valve/hydrant chambers or meter
boxes without checking for foreign objects. Sharp objects can easily pierce gloves. If
any excavation is required, use suitable tools.
Electrical Safety:
Water pipes are frequently used as the connection for electrical earth. Danger of
electric shock exists with metal pipes when disconnecting meters, etc. An earthing strap
should be fitted between the two ends of the pipe before disconnection.
Sensor Magnet:
The Touch Pro Sensors are equipped with a Neodymium Magnet. This feature allows
the sensor to be connected to any ferrous valve, and to remain stable. This magnet has
been chosen due to its magnetic strength and small size.
The Touch Pro outstations are equipped with a Neodymium Magnet. This feature allows
the outstation to be connected to a ferrous pit lid, and to remain stable even under
high-wind conditions. This magnet has been chosen due to its magnetic strength and
small size.

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1.3 OPERATING TEMPERATURE
Refer to the equipment datasheet or your sales representative for guidance on the
storage and operating temperature range of the device. Ensure the equipment is within
its operating temperature range prior to and during use.
1.4 BATTERY INSTALLATION AND CHARGING
Due to shipping regulations, the Touch Pro Base Unit and Outstations are dispatched
with the battery packs packaged separately. All batteries supplied are rechargeable
lithium-ion. The batteries are identical and are interchangeable.
Warning: Do not short-circuit the batteries. Any misuse may result in explosion
or fire. They must not be used in any other application or used with any
other equipment. Only batteries/battery-packs supplied by
HWM-Water Ltd must be used. The sealed battery packs contain circuitry
to prevent overcharging and over discharging.
When delivered, the internal batteries required for the Base Unit and Outstations
will only have a nominal charge and should be fully charged before mobile
operations are undertaken.
To charge the batteries they must first be installed in the equipment.
Tools required: No. 1 Posi bit,
Torque driver set to 0.8 –1.0 Nm
Flat head screwdriver
1.4.1 Base Unit –Battery pack installation
Loosen / remove the Velcro hand
straps from the rear of the unit.
Remove 6 off M3 x 10 Posi
countersunk screws as indicated
using a
No. 1 Posi bit.
Remove the battery cover.
Install and connect the battery.
Replace the battery cover and
secure with 6 off M3x10 Posi
countersunk screws, using a No.1
Posi bit and tighten to 0.8 –1.0
Nm.
Replace / tighten the Velcro hand
straps.
Remove screws x6 here
(Colour of base unit may vary)
Note: Sensors are powered from
the equipment they are
fitted to, and do not contain
batteries.

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1.4.2 Outstation Units –Battery pack installation
Remove the 2 off ¼ turn fasteners from the
base of the unit, as indicated, using a flat
head screwdriver.
Remove the battery cover assembly.
Install and connect the battery.
Replace the battery cover assembly.
Tighten the 2 off ¼ turn fasteners on
the base of the unit, using a flat head
screwdriver.
(Repeat the steps above with the second outstation).
1.4.3 Battery charging and storage
Following the battery fitting procedure, the units will require a full charge before use.
All batteries may be charged simultaneously while the components are stored in the
Touch Pro case. The units will charge regardless of their on/off status.
Charging for all batteries takes up to 6 hours from flat, although an overnight charge is
recommended for maximum performance.
When the batteries are fully discharged, they should be recharged within 24 hours.
Provided the above instructions are followed carefully maximum battery life should be
maintained.
Note: If the system is going to be stored for any length of time, to ensure long life of
the batteries it is recommended that they are charged to approx. 1/4 of capacity.
The batteries should be removed from the units during extensive periods of
storage.
Plugging a charger into an outstation that is switched on will automatically switch off the
outstation. This is to prevent the outstation being left on when charging in the case. To
use an outstation while it is charging, please depress the on/off button for 2 seconds to
switch the outstation back on. An outstation will always charge when a charger is
connected and the battery is not full, regardless of whether the outstation is on or off.
Note: When replacing the Outstation battery, please ensure that no USB is connected.
No damage will be done to the unit, but it will cause the outstation to run a
bootloader program.
(This feature is for factory use or maintenance purposes only).

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2OVERVIEW
2.1 INTRODUCTION
The Touch Pro is a high-speed leak location system which employs:
•Class-leading sensors.
•A large full-colour touch screen.
•An integrated noise filtering, analysis, and management software.
The equipment package combines to produce accurate survey data using cross
correlation techniques.
Leak correlation is used to find the exact location of a leak on a pipe. Highly sensitive
acoustic sensors are placed at intervals on the pipe. These listen to the sound made by
the leak. The data is transmitted wirelessly from ‘outstation units’ to a handheld ‘base
unit’, which processes the information to identify the leak sound, and then applies
mathematical algorithms to pinpoint the leak position.
This latest model retains all the key features of earlier Touch Pro systems and provides
many new benefits which ensure greater operating flexibility and faster operating
speed.
The Touch Pro system is fully menu driven and is operated by touch screen, making it
much easier to input data and also maximising the visible screen area to display results
more clearly than has ever been possible before.
The Touch Pro has sensitive transducers built into its sensor. This enables it to perform
well even in traditionally difficult conditions, such as on plastic and large diameter
pipes. This can be further extended with the use of the Hydrophone-2 sensor option.
The Touch Pro features a high visibility full colour VGA touch screen to greatly improve
data entry and the quality of data presentation. The touch-sensitive user interface eases
and simplifies leak-finding without compromising on functionality or precision and
enables the unit to be operated with the minimum number of key presses. The large
screen, with anti-glare screen protection, clearly displays correlation results and
supportive information even in bright sunshine, effectively combining outstanding
performance with excellent ease of use.
The system is equipped with an innovative multi-filter correlation option which can
simultaneously perform three correlations at different filter settings. This is particularly
useful when the pipe material is uncertain.
The outstation is compact with high-quality long-range radio transmission; it also
features a magnet to secure onto metallic street furniture.
The purpose designed robust case not only carries and protects all components but
charges them via mains or vehicle supply. The charge level for all items can be shown at
the touch of a button.

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2.2 THE CORRELATION PRINCIPLE
The prime function of the sophisticated correlator built into Touch Pro is to measure the
time difference between the leak noise signals arriving at each sensor. Touch Pro
determines the leak position by relating this difference in propagation (travel) time to
the velocity of sound along the pipe and to the measured distance (pipe length)
between the sensors.
In the "classic" correlation process, two sensors are deployed on pipe fittings.
“Dry” connections require one type of sensor; these are attached to the outside of pipes
or fittings. “Wet” connections require a different type of sensor; these are in direct
contact with the water; they are attached using a suitable fitting (e.g., a hydrant) which
provides and access point to the water.
The sensors are positioned either side of the suspected leak position. Noise is created
as pressurised water escapes from the pipe through the leak.
This noise is conducted in both directions away from the leak through the pipe wall (as
minute vibrations). It is also conducted through the water column (as a pressure wave).
The leak noise travels at a constant velocity (V), which depends on the material and
diameter of the pipe. It arrives first at the sensor nearer the leak.
The sounds arriving at each sensor are compared. The time difference (Td) between the
two sound arrival times, combined with knowledge of the sound velocity, which is
provided by the pipe type and length, allows the leak position to be calculated by the
correlator.
The principle of correlation can be defined by: L = ½ (D - (V x Td)) and is shown
graphically below:
Further details of correlation can be found in section 14.

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2.3 SYSTEM OVERVIEW
Touch Pro is generally supplied
in the following basic kit form,
which is the minimum system
configuration specified for
effective leak location operations:
•One Touch Pro Base Unit
•Two Accelerometer Sensors
with protective shrouds and
leads
•Two Outstations
(Red and Blue)
•Headphones
•Carry case
The carry case enables
in-case charging of all
components from a mains
or a 12V vehicle supply.
It also includes the facility to
indicate the status of charge
for all components.
The Touch Pro TM system adds:
•Two Hydrophone 2 type sensors
•Cables for connection of
Hydrophone 2
•Bleed valve accessory kit.
•Adaptor Options and tools
(These must first be discussed
with your HWM representative,
to confirm availability.
Adaptors required vary according to
local needs).
•Consumable items (various)
The additional equipment is usually supplied within an additional carry-case.
(Note: Contents and layout may vary according to kit supplied).
(Cables and Spares)

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In addition, the following optional extras are available:
•Vehicle Mounted Aerials
•Hydrophone 2 Sensor installation tool
•Soft Carry Case
•12V Vehicle Supply Cable
•Mains Charge Cable
•Consumable items (various)
A standard Touch Pro system can be upgraded to the Touch Pro TM system by the
purchase of the additional Hydrophone-2 kit and other items. Discuss any upgrade
requirements with your HWM representative.
2.3.1 Accelerometer sensors
Accelerometers are suitable for a
very wide range of leak detection
operations on pipes or fittings.
The two accelerometer sensors
supplied with the Touch Pro system
detect the noise signals travelling
along the body of the pipe from the
leak point.
These signals are then fed into the
correlator unit for measurement
and analysis.
An accelerometer is positioned on
either end of the pipe work under
investigation and connected either
to an outstation or directly to the
base unit.
The normal operation is to have two
outstations (red and blue)
operating remotely and linked via
radio to the base unit.
The radio inside each outstation, which transmits data to the base unit automatically,
switches on whenever a sensor is connected. The radio frequencies used by the
outstations are matched to the frequencies used by the base unit. To ensure correct
operation, do not mix equipment from different kits.
Caution: Operators should note that all sensors can be damaged by sudden
shock impact and should be handled with care.
Do not drop sensors onto the ground and ensure they do not bang
Cable and
connector
Protective
shroud
Deployment
hook
Magnet
(for attaching to pipe)

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against the pipeline during fitting or removal.
Ensure the connectors of the sensors and other equipment are kept
clean, dry, and free of debris.
Do not clean the connectors with water-based cleaning fluids.
2.3.2 Hydrophone-2 sensors
The Hydrophone sensors are suitable for leak detection
operations where the sensor can be mounted onto a fitting
that provides access to the water column; the sensor must
be in direct contact with the pressurised water.
The two Hydrophone-2 sensors supplied with the
Touch Pro TM system detect the noise signals travelling
within the water column itself, from the leak point.
These signals are then fed into the correlator unit for
measurement and analysis.
A Hydrophone is positioned on either end of the pipe work
under investigation and connected either to an outstation or
directly to the base unit.
The normal operation is to have two outstations (red and
blue) operating remotely and linked via radio to the base
unit.
The radio inside each outstation, which transmits data to the base unit automatically,
switches on whenever a sensor is connected. The radio frequencies used by the
outstations are matched to the frequencies used by the base unit. To ensure correct
operation, do not mix equipment from different kits.
Caution: Operators should note that all sensors can be damaged by sudden
shock impact and should be handled with care.
Do not drop sensors onto the ground and ensure they do not bang
against the pipeline during fitting or removal.
Ensure the connectors of the sensors and other equipment are kept
clean, dry, and free of debris.
Do not clean the connectors with water-based cleaning fluids.
Do not damage threads and seals of the unit ; return to the carry-case
when not in use in order to protect them.
Note: Current systems are supplied with the Hydrophone-2 version, shown above.
Earlier systems may have been supplied with Hydrophone (1).
(Refer to the note within section 2.7 for further information on Hydrophone (1)).
Thread
(for attaching to a water access point).
Note: Thread adaptor(s)
may also be required.

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2.3.3 Base Unit
Touch Pro is a totally self-contained electronic unit which performs the leak noise
correlation calculations accurately and very quickly. The system features a MS Windows-CE
embedded software driven operating system with several intuitive menus, which guide
and prompt the operator throughout all data input and processing phases.
The system is designed primarily for rapid Leak Position and Velocity Measurement
operations, but it also incorporates excellent Listening mode and Surveying mode
facilities.
The intuitive menu driven touch
screen enables the operator to
navigate the set-up procedure by
simply tapping the appropriate
virtual buttons on the high visibility
full colour VGA display screen.
A range of language options are
selectable via the menu screen.
A key feature of Touch Pro is its
Windows compatible software and
USB to PC software-enabled
printing.
The Touch Pro base unit can be
connected to a personal computer via the USB port. Windows will recognize the unit when
it is connected and will display a folder containing all data files without the need for any
external software. This enables easy navigation of the data via the PC.
The required cable for
USB connection is
CABA7605
(CA-068-0008).
Full colour
VGA touchscreen
Charger /
headphone
connection
Battery
Compartment
Handle
/ Strap
Sensor / USB
connection
Antenna
connection
On / Off
switch &
indicator

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2.3.4 Outstations
Touch Pro is supplied with two outstations
which are coded 'Red' and 'Blue' for ease of
identification during operations.
They are identical in operation (but with
different transmission frequencies - each
matched to its appropriate receiver built into
the Touch Pro Base Unit).
The basic Touch Pro kit includes a Red
outstation which is connected to the
remote sensor.
The outstation captures the leak noise
from the sensor and transmits the signals
at U.H.F. to the Base Unit.
The addition of the optional Blue
outstation with a secondary radio link
provides greater operational flexibility and
speeds up many aspects of on-site work.
Radio links also increase operator safety by
allowing the sensors to be deployed
remotely in busy streets or other work areas with heavy traffic flows.
A base magnet at the bottom of each outstation allows the unit to be securely held in an
upright position on metallic street furniture during use.
The outstations are powered by a
lithium-ion battery. The battery is
recharged within the outstation. The
charging may be done in either the
Touch Pro carry case (using the cable
harness), or with a supplied power
lead, or 12V supply cable.
With both sensors plugged into
outstations the Touch Pro base unit
can be located anywhere within radio
signal range or mounted in a vehicle
for fully mobile operations.
The sensor connection on the
outstation can either be used with two
different sensor types –an accelerometer (default) or a Hydrophone
(e.g., Hydrophone-2 ; The unit is also compatible with the Hydrophone version 1).
On / Off switch
LED indicator
Antenna
connector
Charging &
headphone
connector
Sensor &
USB connector
Battery
compartment &
Base magnet
Handle

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2.3.5 Headphones
The Touch Pro operator monitors the noise from the sensors with stereo headphones.
These can confirm instantly that the sensor pick up and signal transmission part of the
system is functioning correctly. This important procedure also enables experienced
operators to determine if the leak signals are suitable for effective correlation and to
check for the presence of background interference in the pipework under test.
The studio quality stereo headphones supplied have earpieces labelled 'Right' and 'Left’
and should be worn accordingly for effective operations. Headphones are supplied to
enable the user to listen to the leak noise either from red, blue or both outstations. The
Base Unit gives the operator full control over the source into the headphones.
The headphones can also be plugged directly into each outstation connected to a
remote sensor on the pipe to monitor a monaural signal. This technique aids sensor
installation and set up by allowing the operator to confirm leak noise and interference
levels quickly at each sensor position before completing the correlation.
HWM-Water Ltd supplies an optional choice of quality headphones which include the
following (or similar) models:
David Clark Model 10S-DC
David Clark Model 10S-DC (Optional)
Stereo Noise Attenuating Headset.
Newest Undercut, Comfort Gel Ear Seals.
Double-Foam Head pad.
Dual volume controls.
Lightweight, 5ft. straight cord.
Earphone elements are hi-fidelity, dynamic
with a range of 10-20,000 Hz.
NRR 23dB.
Fame Headphones
Fame Headphones (Standard)
Spatial sound image.
Outstanding wearing comfort for long
listening sessions.
Excellent attenuation of ambient noise.
Ear cup is rotatable for one-ear listening.
Convenient protective pouch included.
Extremely rugged.
Single-sided coiled cable, detachable.
Comfortable headband and ear pads.

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2.3.6 Charging case
The Touch Pro carry case enables all components to be stored and charged
simultaneously (FIG A).
A single recessed charging connector on the side of the case charges the two
outstations and the base unit when they are in storage. A display panel inside the
charging case (FIG B) enables the operator to view the charging status of each
component at the touch of a button without needing to remove them from the case.
In-case charging can take place through mains power (using the supplied mains
adapter) or a 12V vehicle supply.

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The internal battery of the Touch Pro
system will run continuously for
approximately eight hours without
re-charging.
The system draws very little current and
can also be operated from a vehicle's 12-
volt battery for long-term site operations.
The lithium-ion rechargeable batteries
employed are interchangeable with those
of the outstations.
Units can be stowed with accelerometer
type sensors still connected for fast
deployment.
The battery display panel inside the case
(FIG B) is used to show the battery status
of each connected outstation and base
units without having to physically switch
on each unit.
An LED displays the battery status of each
individual unit connected. To operate,
simply push the button to activate the
LEDs. The LED colour displayed will either
be green, amber, or red to show the
battery level for each unit connected. The LED will remain lit
for 5 seconds after the button is pressed before switching off.
Any LED that does not light when the push button is pressed
indicates that individual unit is not connected or faulty.
When the charging adapter is connected, any unit connected
to the case charger will be charged. Units may be disconnected
or re-connected to the case charger whilst charging at any
time. Whilst each unit is charging, an LED on that unit will
slowly flash green. When charging is completed, the LED will
stop flashing.
Pushing the button whilst charging to display the battery
status will temporarily stop the charging in order to allow an
accurate reading to be taken. When the 5 seconds has expired
the lights on the display panel will switch off and charging will
resume automatically.
When the charging adapter is initially connected to the connector on the outside of the
case, the LEDs will light to show the battery levels of the connected units. After 5
seconds the lights will switch off and the charging will begin. This automatic process can
be used to check that the units have been connected to the charger successfully and will
charge when power is applied.
12-volt
power
cable

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2.4 OPTIONAL EQUIPMENT
HWM-Water Ltd can provide the following optional equipment which expands the
overall capability of Touch Pro even further and improves operating flexibility in difficult
situations.
2.4.1 Vehicle mounted aerials
An extension aerial is required for effective receiver operation when Touch Pro is
mounted in a vehicle and operating over extended ranges.
The standard Touch Pro receiver aerial is simply unscrewed, and the coaxial cable of the
extension aerial is connected instead. The extension aerial has a magnetic base for
fixing to the vehicle's roof. Alternatively mounts for non-ferrous roofs are available.
2.4.2 Hydrophone-2 (sensor kit)
Hydrophones are available as optional equipment (or included in Touch Pro TM
systems).
Because accelerometers are attached to the external surfaces of pipe systems, weak
noise signals may sometimes be degraded by mechanical filtering or high background
interference effects. In these instances, and if suitable pipe fittings are available,
Hydrophone sensors can be used instead of accelerometers. Hydrophones may
provide better leak noise signals in difficult operating conditions.
If two suitable pipe fittings are not available, operators may use one hydrophone and
one accelerometer. It should be noted, however, that this technique is not generally
recommended because the although the hydrophone has a greater sensitivity and
working range, the system as a whole will be restricted by the accelerometer sensor
performance.
Hydrophone sensors are mounted for direct contact with the water at hydrant, air valve
or flowmeter points. The Hydrophone may have to use adaptor(s) to convert to the
thread appropriate for the fitting it is being connected to. A selection of adapters for
various pipe fittings is available from HWM; discuss your requirements with your HWM
representative for further details.
Leak noise propagates very efficiently along the water core, which gives hydrophones a
greater working range than the accelerometer type sensors. Hydrophones are also far
more sensitive to low pressure waves (signals) and they are particularly effective in
locating leaks in large diameter trunk lines.
Hydrophones generally give good results in all types of plastic pipe systems and the
signal information from hydrophones often increases operator confidence where any
soft or non-metallic pipe materials are encountered.