OVARRO Eureka5 User manual

Version: 1.3
Eureka5 User Manual
24 March 202
2
CXD-930-UM-044

Eureka5 User Manual
The document contains confidential and proprietary information of Ovarro LD Limited and must be kept
strictly confidential. It may not
be disclosed in whole or in part under any circumstances without the express prior written consent of Ovarro LD Limited.
General enquiries or enquiries regarding
permission for use of material contained in
this document
should be addressed to:
Ovarro LD Ltd
Parklands Business Park
Denmead, Hampshire, PO7 6XP
United Kingdom
E:
[e-mail]
T:
[phone]
Registered Office: Parklands Business Park, Denmead, Hampshire PO7 6XP, United Kingdom |
Registered in England and Wales, no.
2959100
CXD-930-UM-044
Version: 1.3
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Copyright
©
Ovarro LD Ltd 2022. All rights reserved.
This publication may not, in whole or in part, be reproduced, transmitted, transcribed, stored in a retrieval system, or
translated in any form or by any means without prior written consent of Ovarro LD Ltd.
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rks
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trademark of Apple Inc.. Microsoft® Windows® is a registered trademark of Microsoft Corporation.
Technical Specification
Ovarro operate a poli
cy of continual product improvement and therefore reserve the right to change the specification
without notice. This manual may describe features which are not incorporated in your
equipment, but which are available
either to special order or as an upgrade
. If you wish to know more about these features and/or wish to upgrade your
equipment, please contact Ovarro.
Equipment Usage
Ovarro cannot be held responsible for personal injury or equipment damage where the product is used for anything other
than its in
tended purpose.
Liability Statement
We have used our best efforts to ensure that the content of this document is both useful and correct at the time of
publication. This document is supplied for information only, is subject to change without notice, and sh
ould not be
construed as a commitment by Ovarro. The authors and Ovarro assume no responsibility or liability for any errors or
inaccuracies that may appear in this document, nor the use to which it may be put.
Customer Support/Service
Continuous product s
upport and services are available to all customers. For information or assistance, contact Ovarro at:
Telephone:
[phone]
Email:
[e-mail]
When contacting Customer Support, please include
the model and serial number of the unit (located on a label on the unit)
and the date of purchase.

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Revision History
Version Date Description
1.0 22/072021 First draft
1.1 04/03/2022 2nd draft
1.2 24/03/2022 3rd draft – DoCs to be added in appendices
1.3 24/03/2022 4th draft – update to warning re hydrophone removal
Version:1.3

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Contents
1
Introduction
7
1.1 System Overview
7
1.2 System Contents
8
1.2.1 Standard Package
8
1.2.2 Optional Items
8
2
Principles of Leak Noise Correlation
9
2.1 Methods of Location
9
2.2 Sensor Position
10
2.2.1 Leak Beyond Sensors
10
2.2.2 Leak on Connecting Pipe
10
3
System Components
12
3.1 Transport Case / Charger
12
3.2 Transmitters
14
3.2.1 Antenna Socket
14
3.2.2 Pushbutton Switch
14
3.2.3 External Sensor / Charger Socket
15
3.2.4 Indicator LEDs
16
3.3 Receiver Unit
18
3.3.1 Antenna Socket
18
3.3.2 On/Off Push Button Switch
18
3.3.3 Indicator LEDs
19
3.3.4 Charger Input Socket
20
3.3.5 Charging
20
4
Deployment
21
4.1 Choosing the Transducer Type
21
4.2 Attach Transducers
21
4.2.1 Accelerometers
21
4.2.2 Hydrophones
21
4.3 Set-Up Transmitters
22
4.4 Set-Up Receiver Unit
23
4.5 Radio Range
23
4.6 Inter-Transducer Distance
23
4.7 Velocity
23
4.8 Filter Settings
23
5
EUREKA GO App
24
5.1 Establish Wi-Fi Connection
24
5.2 Main Correlation Screen
25
5.2.1 Red and Blue Transmitter Power Icons
25
5.2.2 Menu Button
25
5.2.3 Correlation Button
25

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5.3 Menu Screen 26
5.3.1 Receiver Unit Battery Level
26
5.3.2 Disconnect Button
26
5.3.3 Imperial units
26
5.3.4 Velocity table
26
5.3.5 Saved recordings
27
5.4 Velocities Tables Screen
27
5.4.1 Pipe Materials
27
5.4.2 Velocities
27
5.4.3 Restore Factory Defaults
28
5.5 Main Correlation Screen
29
5.5.1 RUN Button
29
5.5.2 PEAK Button
30
5.5.3 SUPPRESS Button
30
5.5.4 EDIT PIPE Button
31
5.6 Pipe Editor
31
5.6.1 Pipe Length
32
5.6.2 Pipe Diameter
32
5.6.3 Pipe Material Type
32
5.6.4 Add Pipe Section
33
5.6.5 Remove Pipe Section
33
5.7 Velocity Correction
33
5.7.1 Velocity Correction Example
34
5.8 Save Data
36
5.8.1 Operator Name
36
5.8.2 Location
36
5.8.3 Notes
36
5.8.4 Saved Recordings
37
5.9 Filter Screen
38
5.9.1 Low Filter Value
40
5.9.2 High Filter Value
40
5.9.3 Frequency Spectrum Data
41
5.9.4 Coherence
41
6
Maintenance & Troubleshooting
42
6.1 Care of Your Eureka5 System
42
6.2Sensor Replacement
42
6.3 Battery Replacement
42
6.4 Troubleshooting
42
6.5 Maintenance & Service
42
7
Appendix A - Technical Specification
43
8
Appendix B – User Information Sheet
45
9
Appendix C – Lithium-Ion Battery
46
10
Appendix D – UKCA DoC
48

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Appendix E – EU DoC
49

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1Introduction
1.1 System Overview
Eureka5 is a high-performance leak noise correlator used for the location of leaks in buried water pipes. The system
combines sophisticated technology with flexible operation to locate leaks in difficult conditions, e.g., where there is
substantial background noise, where only the quietest of leak noise is present, or with a variety of pipe materials.
The Eureka5 system comprises radio transmitters, radio receiver with signal processing electronics and the EUREKA GO
software application.
The transmitters and receiver are powered from internally mounted 7.2V Lithium-Ion battery packs.
The system is designed for outdoor use. However, battery charging of the equipment should only be performed in the
transport case either indoors using the mains charger supplied or in a vehicle using the vehicle charge lead.
Other environmental specs can be found on the Technical Specification in Appendix A of this manual.
Transport Case, Transmitters, Receiver and Accelerometers

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1.2
System Contents
1.2.1
Standard Package
The
Eureka5 standard package comprises:
•
Red transmitter
•
Blue transmitter
•
Transmitter antenna (x2)
•
Receiver unit
•
Receiver antenna
•
Accelerometer sensors (x2)
•
Headphones
•
Car charge cable (12VDC)
•
Main’s charger
•
Transport case
•
EUREKA GO App available from the AndroidTM PlayStoreTM
1.2.2
Optional Items
The optional items available are:
•
Hydrophone sensors
•
AndroidTM tablet

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2Principles of Leak Noise Correlation
Leak noise correlation is used to detect leaks in pipelines where there is a positive internal pressure, such that a leak causes a
loss of fluid to the outside. The movement of fluid through the leak causes rapid pressure changes around the site of the leak
such that there is a randomly varying noise source located at the leak. This noise travels in both directions, at the same
velocity, from the leak.
(Noise is not a constant frequency like a musical note but is a random and continually changing mixture of different
frequencies. It is this characteristic which enables the correlator to operate.)
2.1 Methods of Location
Previous methods of leak location relied on detecting a noise, then tracing it at ground level to find the point of maximum
noise, which was assumed to be directly above the position of the leak. The equipment used included listening sticks and
stethoscopes, but these were difficult to use if the noise was faint or too loud to be accurately located. Background noise
was another problem; electronically- filtered amplifiers were introduced in an attempt to overcome such problems.
A correlator operates by comparing the noise detected at two different points in the pipeline. Noise travels from the leak in
both directions along the pipeline at a constant velocity (which depends on various factors), so that if the leak is equidistant
between two sensors then these sensors will detect the noise at the same time. Conversely, if the leak is not equidistant
then the sensors will detect the same noise at different times, and the difference in time (the time delay) is measured by the
correlator. The following diagram illustrates this:
The sensors are located on the valves A and B (convenient access points for underground pipes), and as shown the leak site
is closer to A.
By the time a particular noise from the leak has reached A, the same noise heading towards B has only travelled as far as X.
The distance from X to B causes a delay t before the noise arrives at B, thus the correlator detects the delay (t) between the
arrival of the noise at A and its arrival at B. If the velocity of sound is V and the distance between the sensors is D, then as the
distance from X to B = V * t, (velocity x time), then D = (2 * L) + (V * t). This equation may be rearranged to give L, the
distance from the nearer sensor to the leak site:

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As the sound velocity can be calculated from knowledge of the pipe diameter and material, while the distance between the
sensors can be determined by careful measurement, the correlator can calculate and display the location of the leak as a
direct distance from its nearest sensor. Alternatively, the correlator may be used to measure the actual velocity of sound in
the pipework being examined, so ensuring the highest possible accuracy in locating the leak.
2.2 Sensor Position
Correlator operation depends on having the leak located between the two sensors. There are two situations where this is
not the case, and one sensor will have to be moved before an accurate correlation can be performed.
2.2.1 Leak Beyond Sensors
If the leak is located outside the length of pipe between the sensors, then the correlator will ignore the transit time from the
leak to the nearest sensor, as this transit time will be the same for both sensors. This will give the result that the leak will
appear to be located directly at the sensor nearest to the leak. (This is sometimes termed “out-of-bracket”.) This is an
indication that one sensor must be moved to locate the leak position accurately.
2.2.2 Leak on Connecting Pipe
If there is a leak on a pipe that connects to the pipe being sensed, then the noise will appear to spread from the point of
connection of the pipes, and so will appear as a leak at that point. It is then necessary to move one sensor to the connecting
pipe (in other words, to place the leak between the sensors) to locate the leak accurately. A thorough knowledge of the
layout of the entire pipe network is required to ensure that the correlator is making measurements on the correct section of
pipe and that there is no possibility of leaks on branch pipes causing false readings.

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3System Components
3.1 Transport Case / Charger
The transport case acts as the storage area for all the components of the system and a charger distribution/connection
system to allow the Transmitters and Receiver units to be charged in-situ in the case.
Key Description
A12VDC charge lead for Red Transmitter
B 12VDC charge lead for Blue Transmitter
C 12VDC charge lead for Receiver
D 12VDC charger input connector
E Accelerometer sensor
AB
C D E

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The photos below show the charger input socket with the mains charger fitted and the mains charger.
The lid section of the transport case is used to store the tablet and the 3 antennas.
Key Description
FPosition for AndroidTM Tablet
G Antennas (x3)
G
F

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3.2 Transmitters
Eureka5 has two transmitters, one red and one blue. They both listen to noise which is transmitted via an internal radio
transmitter. The transmission frequency of each transmitter is different to distinguish the different noise signals.
Key Description
AAntenna Socket
B Pushbutton Switch
C External Sensor /Charger Socket
D Indicator LEDs
3.2.1 Antenna Socket
The antenna TNC socket allows the connection of one of the three supplied antenna that are stored in the transport case lid.
3.2.2 Pushbutton Switch
The pushbutton switch has several functions.
When the Transmitter is off:
•Short press will show the battery charge on the LED Level Indicator.
•Long press (2 seconds) will turn on the transmitter
When the Transmitter is on:
•Short press will cycle the transmitter between low and high radio power output.
•Long press (2 seconds) will turn off the transmitter (press and hold until all the LEDs come on and go off).
B
D
C
A

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3.2.3 External Sensor /Charger Socket
The 4-pin connector allows the connection of an external sensor (Ovarro supplied accelerometer or optional hydrophone). It
alternatively connects the transmitter to the charger when it is in the transport case.
During normal operation a voltage of 5VDC is output from the transmitter to power the sensor. A low voltage (mV) analogue
signal is then generated by the sensor and input to the transmitter via the same 4-pin connector. During charging, the
12VDC charging supply is connected to this connector via the mating connector inside the transport case.
3.2.3.1 External Accelerometer
This allows placing the transmitter above ground to improve the radio signal between the transmitter and receiver unit.
External accelerometers from previous Eureka correlation units are compatible with Eureka5 transmitters.
3.2.3.2 Hydrophone (Optional Accessory)
Hydrophones are an optional accessory and can be purchased separately to improve noise quality for large diameter
(typically >300mm) and plastic pipes. A hydrophone can be attached to the external sensor connector on the Transmitter
Unit in the same way as an accelerometer. It is then directly inserted into the pipe through a hydrant or similar fitting. This
option then needs to be selected on the EUREKA GO App.
Adhere to local water hygiene regulations when inserting hydrophones into potable water pipes.
The EUREKA GO App must have the correct information about the sensors connected.

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3.2.4 Indicator LEDs
State
Battery LEDs (A)
Tx Power LEDs (B)
Amber Bar Graph LEDs (C)
Off
Off
Off
Off
On Battery level
Green: normal
Red: low
Flashing red: critical
Transmit power
1 Green: low
2 Green: high
Sound level
Charging Charging state
Green: charging / fully
charged
Flashing red: fault
Off Progress of charging cycle
Frequency Select
Off
Off
0V link selection indicator
3.2.4.1 Transmitter Charging
The transmitters are charged in the transport case. To charge, connect the associated charge lead in the transport case to
each transmitter. Connect the transport case to the mains supply using the mains adapter or use the vehicle charge cable
(12VDC).
A
B
C

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When first connected to the charging source, the Amber LEDs on the transmitters will scroll in sequence 5 times to indicate
charging has started. Whilst charging the LEDs will show the status as below:
State Condition LED indication
5Charging complete Amber: All 4 on
Power: on green
4Capacity < 90% Amber: 1 & 2 & 3 on; 4th LED flashing
Power: on green
3Capacity < 70% Amber: 1 & 2 on; 3rd LED flashing
Power: on green
2Capacity < 50% Amber: 1 on; 2nd LED flashing
Power: on green
1Capacity < 30% Amber: 1st flashing
Power: on green
Fault FAULT signal Amber: all 4 off
Power: flashing red
The over temperature state may occur when charging in high temperatures. The transmitter electronics will manage this
state and continue to charge when possible.
The fault state indicates a problem, and the transmitter should be returned to an Ovarro Service Centre for further
investigation.
Only Eureka5 charge leads should be used to charge Eureka5 transmitters. DO NOT attempt to use
Eureka2 or Eureka Digital charge leads, as damage may occur which will not be covered by
warranty.
3.2.4.1.1 Charge Time
Charge time from flat to full is around 3 hours. The charge time will be longer in higher temperatures; there is automatic
monitoring in the electronics to prevent the batteries overheating.
3.2.4.1.2 Battery Life
Transmitter battery life is around 11 hours, in low power transmission mode.

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3.3 Receiver Unit
The Receiver Unit receives and processes the noise data from the radio transmitters and then transmits the data via Wi-Fi to
a Tablet running the EUREKA GO App to produce a leak noise correlation.
3.3.1 Antenna Socket
The antenna TNC socket allows the connection of one of the three supplied antenna that are stored in the transport case.
3.3.2 On/Off Push Button Switch
The on/off push button switch (B in the photo) has several functions: -
When the Receiver is off:
•A single press of the button will start the power on process. At this point the Power LED will turn on. Approximately 90
seconds later the Wi-Fi Status LED will start to flash fast and intermittently. The unit is not fully powered until the Wi-Fi
Status LED is flashing slowly & steadily. This indicates that the Wi-Fi is trying to connect to the tablet.
When the Receiver is on:
•Two quick presses of the button will start the power down process. The Wi-Fi Status LED will flash fast and steady for a
few seconds and then the Power LED will turn off. The unit is now powered down.
•Pressing and holding the button for longer than 6 seconds will cause a forced power-down and reset the unit. This
operation should be avoided as it can limit the life of the internal memory card.
Key Description
AAntenna Socket
B On/Off Push Button Switch (Yellow)
C Belt clip
D Charge Input Socket
D
A
B
C

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3.3.3 Indicator LEDs
Key Description
APower
On if the unit if powered on
B External Power
On if external power is connected to the unit
C Charge status
On – Charging
Off - Charge complete
Flashing - Error (charge suspend, input overvoltage, timer fault, no battery)
D Wi-Fi status
On - Wi-Fi connected
Off - Wi-Fi not connected
Fast Intermittent Flash – Powering up
Slow Steady Flash – Fully powered up & Wi-Fi trying to connect
Fast Steady Flash – Powering down
A
B
C
D

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3.3.4 Charger Input Socket
The 4-pin connector connects the Receiver to the charger when it is in the transport case. During charging, the 12VDC
charging supply is connected to this connector via the mating connector inside the transport case. No voltage is output from
the charger input socket on the Receiver Unit.
3.3.5 Charging
The Receiver unit is charged in the transport case. To charge, connect the associated charge lead in the transport case to
the Receiver. Connect the transport case to the mains supply using the mains adapter or connect the vehicle charge cable to
the vehicle supply (12VDC).
When first connected to the charging source, the External Power LED on the receiver unit will illuminate, followed by the
Charge Status LED if charging required.
If the Charge Status LED flashes, then remove the charge lead and then reconnect. If the Charge Status LED continues to
flash, the Receiver unit or Eureka5 system should be returned to an Ovarro Service Centre for further investigation.
.
Only Eureka5 charge leads should be used to charge the Eureka5. DO NOT attempt to use Eureka2
or Eureka Digital charge leads, as damage may occur which will not be covered by warranty.
3.3.5.1 Charge Time & Battery Life
Charge time from flat to full is around 3 hours. The charge time will be longer in higher temperatures; there is automatic
monitoring in the electronics to prevent the batteries overheating.
3.3.5.2 Battery Life
Receiver battery life is around 7hours, depending on usage pattern.