Gutermann AQUASCAN 610 User manual

AQUASCAN 610
Operating Manual
JW V 1.1

AQUASCAN 610 1/41
Version 1.1
Contents
1. Introduction............................................................................................2
1.1 System Components ..........................................................................2
1.2 Charging all equipment.......................................................................3
2. Quick Start Guide...................................................................................3
3. Main Screen...........................................................................................4
4. Correlator Keyboard...............................................................................7
4.1 On/Off:................................................................................................7
4.2 Pipe Details.........................................................................................8
4.3 Listen Function ..................................................................................9
4.4 Filters...............................................................................................10
4.4.1. Advanced spectrum analysis:...........................................................11
4.4.2. Manual filter......................................................................................11
4.4.3. Notch filter:........................................................................................13
4.4.4. Multiple filters:...................................................................................13
4.5 Main Menu........................................................................................14
4.5.1. Contrast......................................................................................15
4.5.2. Peak Suppression......................................................................15
4.5.3. Velocity Check ...........................................................................16
4.5.4. Ground Microphone....................................................................19
4.5.5. Live Signals................................................................................21
4.5.6. Manage Measurements..............................................................21
4.5.7. Corr Settings ..............................................................................23
4.5.8. Settings......................................................................................24
4.5.9. Communication ..........................................................................30
4.5.10. Status.........................................................................................31
5. Sensors................................................................................................32
5.1 Positioning of Accelerometers ..........................................................33
5.2 Extension Antenna............................................................................36
5.3 Installation of Hydrophones ..............................................................37
6. Example Results..................................................................................40
7. Trouble Shooting..................................................................................42

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1. Introduction
The AquaScan 610 has been specifically designed to be an ultra-
compact cordless correlator with Bluetooth for download
communication. The ‘Streetworks Act’ friendly sensors with built in
radio has led the way in next generation correlators almost eliminating
the need for cables. The AquaScan 610 has the highest precision on all
pipe materials including uPVC, MDPE and other plastics. The Wizard
assist feature makes the operation user friendly. With the Advanced
Spectrum Analysis (ASA), multi- filter, manual filter and onsite velocity
check options the AquaScan 610 has many features for the
experienced user.
1.1System Components
The AQUASCAN 610 consists of:
•Cordless Correlator
•Two radio-operated sensors
•Battery chargers AC mains and DC,
•Antennae & Extension cables,
•Hydrophone sensors & Cables (optional)
•Bluetooth Headset & Charger
•AQUASCAN 610 viewing software.

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1.2Charging all equipment
The Sensors and Correlator contain rechargeable batteries and can be
charged either from AC mains electricity (110 -240v) using the charger
supplied or from the 12v DC socket in a car. All 3 components maybe
charged at the same time from the red lead supplied. Remove the red
cap from the 12v Cigar plug on the red lead and insert it into either the
AC mains charger socket for charging in the office or directly into the
12v socket in the car. 2 hours is usually enough time to achieve full
charge. Both Sensors LED will flash during charging and then turn off
when complete. The Correlators battery symbol will show full when
complete.
2. Quick Start Guide
To start, once all components are charged connect antenna to the
Correlator and switch on . Connect the Antenna to both Radio
Sensors.
a. Deploy both Sensors by magnetically attaching them to the pipe
fittings. Measure the distance between the sensors with a
measuring wheel. If hydrophones are used ensure the water
connections are leak free. Switch the sensors on by pressing the
push button on the top for 1 second until the red LED is on
constant before walking half way between the sensors with the
Correlator. Note: Both sensors LED must either flash (Plastic
Mode) or be constant. A mixed setting would falsify the
measurement result! Make sure the A and B radio signals are close
to maximum.
b. Press the Pipe button and enter the pipe material, diameter and
distance (measured between sensors with a wheel). Press the Pipe
button to verify the indicated data is shown at the top of the main
screen.
c. Check whether the connection with the sensors is good by listening
to the sensors with the headset, see chapter 4.3. Optimise Antenna
location and sensor contact to create the clearest signal if not
already achieved.
d. Press the button Start Correlation and wait until correlation has
completed or stop the correlation after 5 minutes by pressing .
e. Adjust the filter (see chapter 4.4) setting if necessary to enhance
the measurement quality and cleanness (reduced minor peaks and
spicks).

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f. With challenging measuring conditions, adjust the measurement
duration (Chapter 4.5.8) in the Settings for a longer period.
g. Save the Correlation via manage measurement (chapter 4.5.6).
3. Main Screen
Fig. 1 AquaScan 610 Main Screen
1. Pipe Length is the distance between sensors A & B following the
path of the pipe which is not always a straight line.
2. Pipe material is what the pipe is manufacture from, this can often be
found on network drawings/maps or known by an experienced
operator.
3. Pipe diameter can also be found on pipe network diagrams
4. Velocity is the speed of sound along the pipe wall; this is preset
within the velocity tables held in the Correlator and is determined by
the combination of 1, 2 & 3.

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5. Leak Confidence is the percentage possibility of there being a leak;
any correlation above 80% should be investigated.
6. The radio signal strength is an indicator of the quality of the radio
reception. The more blocks filled in the better the signal. Stand half
way between sensors to balance the number of blocks also listen to
the sensors to determine any radio interference.
7. Leak position is the distance from Sensor A and B to the leak. The
tallest correlated peak determines the position.
8. Cursor position is the distance to the dotted line on the correlation
curve. This is user adjustable by using or .
9. Frequency Spectra B is the sound signal frequency curve from
sensor B and is displayed between 0 to 2500Hz. This is useful for
evaluating the sensor’s signals individually. You may be able to see:
Interferences that the sensors picked up; e.g., from the electricity
mains frequency. Mains frequency interference appears as a peak
at 50 or 60 Hz, depending on your country.
Weak radio transmission, if the radio transmission is very weak or
missing, e.g. caused by an auto-shut-off of the transmitter, the
sensor's spectrum will contain a white noise distribution. White
noise shows as a nearly equal power distribution across all
frequencies. In the graph, you will see the bars for the frequencies
form a straight horizontal line.
10. Signal level B is the sound signal strength indicated by blocks; the
more blocks filled in the stronger the signal.
11. The combined spectra or cross spectrum is a spectrum made up of
only the correlating components of the two signals. We recommend
using the cross spectrum as a guide to filter adjustment.
12. Notch Filter; Electricity interference appears as a peak at 50 or 60
Hz, depending on the country e.g. USA and Philippines = 60HZ,
Most of Europe, Australia, New Zealand, Singapore, Malaysia =
50HZ. A 50 or 60 Hz Notch filter can be applied to eliminate the
interference.
The Filter settings displayed is the bandwidth created by the lower
(e.g. 300Hz) and upper filter (e.g. 1200 Hz) which are represented
by dotted lines on the combined spectra. These filters are
determined by the pipe material selected, using manual filtering the
lower and upper filter maybe adjusted- see filtering chapter 4.4
13. Signal level A is the sound signal strength indicated by blocks; the

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more blocks filled in the stronger the signal.
14. Frequency Spectra A is the sound signal frequency curve from
sensor B and is displayed between 0 to 2500Hz. This is useful for
evaluating the sensor’s signals individually.
15. The Correlation Curve displays the processed measurement data
for visual evaluation and analysis of the measurement result. A
single peak creates a confident result whereas multiple peaks
known as a Manhattan sky line is a poor result.
16. Battery level indicator fills in depending on the state of charge; the
example currently shows 70% charge. When the battery is full the
indicator is filled in completely. A lightening symbol next to battery
indicator appears when the charger is plugged in.

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4. Correlator Keyboard
Fig. 2 AquaScan 610 Correlator keyboard
4.1 On/Off:
Press at least 1 sec to turn the Correlator on or off. If the device is
on, pressing the key less than 1 sec will switch the backlight on or
off.
Memory reset: Pressing while powering the unit on will display a
menu with the following choices:
•Continue: Continue without deleting anything
•Clear Memory except saved meas.: Delete actual
parameters and measurement. Saved measurements will not
be deleted
•Clear all memory: Deletes also the saved measurements
Contrast adjust: While the introduction screen is visible, you can
change the contrast with or .

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4.2 Pipe Details
Change between the input fields with .
Enter a section: Select it with / and press .
Discard changes with . Set the new parameters with . You can
also set the parameters and initiate directly a new correlation with
Press key to enter pipe parameters:
Fig. 3 Pipe Material Menu
Select material using or and then to move to diameter. Use
or to choose the diameter and to accept. Enter length of pipe
by increasing or decreasing the digits or then to select until
the correct distance is entered. Press key to return to the main
screen or to Correlate.
Select manual to enter sound velocity instead of material and diameter
however the sound velocity must be known by the operator or
measured using the velocity check (see chapter 4.5.3.)

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If the pipe consists of different materials select multiple:
Fig. 4 Multiple Pipe Material Menu
When entering multiple materials the first section is always from sensor
A to the change point then next section towards sensor B. Determine
how many sections make up the complete pipe between sensor A & B.
Press on section 1 which will initialize the main material menu, enter
the pipe details as described for single material. Choose section 2 and
repeat the process then section 3 until the whole pipe length has been
established.
Clear all deletes the list of sections.
Single Material reverts back to the material menu and allows the entry
of 1 section between sensor A & B.
4.3 Listen Function
Press to enter the Headset/listen menu.
Fig. 5 Headset listen Menu

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Connect the Bluetooth headset to the AQ 610. You can initiate the
connection from the AQ 610 (see chapter 4.5.1.3.). Press for
entering the headset menu.
Note: Before using the Bluetooth headset for the first time, it is
necessary to pair it with the AQ 610 (refer to section 4.5.1.3.).
Change between sensor signal A or B with or .
Turn listening on/off with key (mute function)
4.4 Filters
The objective for filtering is to clean up the correlation and unmask any
hidden leak.
Press the filter menu will appear:
Fig. 6 Filter Menu
Fig. 7 Optional Multiple Filter Menu

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4.4.1. Advanced spectrum analysis:
Fig. 8 Advanced Spectrum Analysis
An automatic analysis of the frequency spectrum will be initiated. After
the analysis is completed, you have the choice for setting the filters to
the calculated values or to discard the results.
4.4.2. Manual filter
1. Listen to the leak to determine if it is high or low frequency.
2. Consider the ground material, leak flow, pipe material, pipe
diameter and type of leak to estimate frequency.
3. View the frequency spectrum of A and B and see if you can find
matching peaks by frequency (they will not be the large peaks).
4. Start by making an informed estimate at the required filter setting. If
you are not successful retry using a series of different settings until
you have exhausted every option.

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Fig. 9 Select Lower filter
Set filter manually with the cursor in the coherence spectrum graphics.
Select lower filter limit and press
Fig. 10 Select upper filter
Select upper filter limit and press or press to return to lower filter
limit

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Fig. 11 Resultant filter
The correlation curve and the result will be updated while changing the
filter.
4.4.3. Notch filter:
Switch notch filter on or off. When selecting on you can enter the notch
filter frequency. Notch filter can be used for suppressing electrical
mains disturbing signals that belong to a small frequency range, e.g.
nearby A/C currents at 50/60 Hz. As a rule 110/120V AC creates a
50Hz disturbance and 230/240V AC create a 60Hz disturbance.
4.4.4. Multiple filters:
Fig. 12 Multiple filter

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Initialise the multiple filter screen by choosing on and press or press
to cancel. The main screen will appear as in fig 12 with 6 separate
correlation lines with the Q for quality to the right side as well as the
filter bandwidth. While the multi filter is active a correlation can be
perform by pressing .
To deactivate the multi filter screen press then move the cursor to
multi filter and press highlight off as shown in fig 13 and press .
Fig. 13 Multiple filter on/off
4.5 Main Menu
Press for Main Menu. Select item by using / keys and confirm
with :
Fig. 14 Main Menu

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4.5.1. Contrast
Adjust contrast with or . Confirm with , discard with .
4.5.2. Peak Suppression
Use this feature to remove unwanted peaks which are affecting the
correlation result. For example; a secondary peak which is caused by
consumption as the highest peak is the exact distance to where a
household meter is turning, remove this with peak suppression.
First move the cursor to position 1 with or . Confirm with ;
Fig. 15 Peak Suppression part 1
Secondary move the cursor to position 1 with or .Confirm with ;
Fig. 16 Peak Suppression part 2

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The result below shows the peak has been removed and the distance
from A & B has changed;
Fig. 17 Peak Suppression result
4.5.3. Velocity Check
The correct sound velocity is very important for the precision of the leak
location result. The nearer the leak is to one of the sensors creates a
large time delay, the more important the velocity value as during the
mathematical correlation process a greater error will occur. It is very
important to understand that the sound velocity table, defined by pipe
material and diameter, is only theoretic and that the specific real
velocity might differ from site to site. We recommend that whenever the
measurement shows a leak position which is not in the middle third
section of the total distance between sensors A and B, the real on-site
sound velocity should be verified. This can only be done when the pipe
material to be verified is homogeneous, i.e. is a single material and
diameter.
For this velocity check we can either use the real leak itself, by moving
both sensors to one side of the leak, or we can simulate a leak i.e. by
opening a hydrant or a valve. In this case we simulate the leak outside
of the pipe section we are measuring (that means that both sensors are
on one side of the leak).
First, enter the distance between sensor A & B with or . Confirm
with ;

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Fig. 18 Velocity Check part 1
Next, Select outside leak Confirm with ;
Fig. 19 Velocity Check part 2
Then, Select metallic or non-metallic / unknown pipe material.
Note: If pipe material is metallic the measurement will be more precise
if you select metallic instead of unknown.
Fig. 20 outside Leak

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Fig. 21 Velocity Check part 3
The measurement will start automatically. After the measurement has
finished the velocity will be calculated and you will be given the option
to use the calculated velocity.
For inside leak (sound source is between the sensors at a known
position). In case of inside leak the sound source should not be in the
middle third of the pipe. If the sound source is exactly in the middle of
the pipe it is impossible to determine the velocity. The difference when
entering the information is the distance between sensor A and the
known leak has to be entered as shown below;
Fig. 22 Velocity Check inside leak

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4.5.4. Ground Microphone
Fig. 23 AquaScan 610 with Geophone attached
To assemble the Geophone, take the T-bar handle and screw into the
stainless steel plate of the Geophone base in a clockwise direction.
There should be no thread visible once complete. When attaching the
cable ensure the notch lines up between the 4 way plug on the cable
and the socket of the T-Bar. Connect the Geophone to the correlator as
shown in fig 23 by removing the cap from the binder socket on the right
side of the correlator and then lining up the notch of the binder plug and
socket then push and screw clockwise until hand tight.
Please make sure that your headset is connected to the AQ 610 and
that it is in mute state before entering the ground microphone screen.
See headphone chapter 3.3 for further information.
Fig. 24 Velocity Check inside leak