Full Text Searchable PDF User Manual
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1. Design and principle of operation
Water leak detector «Success-АТ-407N» is designed for:
- water leak detection from metal or plastic pipelines at depths of up to 6 m underground
- water leak detection from the pipelines inside the house
Kit components are:
1–Receiver АP-027
2–Acoustic sensor АD-227
3–Headphones
Operation conditions
- Ambient temperature, °С ...........................................................-20 to +50
- Relative humidity, % ................................................................. up to 90
1
2
3
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Receiver AP-027
(01-05-15)
2. Receiver AP-027
Appearance and Controls
Fig. 2.1
1
power on/off button
8
/
sensitivity buttons (higher/lower)
2
visual indication type button
9
▲/▼
selected parameter adjustment
buttons (up/down)
3
sound indication type button
10
frequency button (filter
frequency adjustment on/off)
4
◄/►
parameter selection buttons (left/right)
11
LCD screen
5
filter button (broadband on/off)
12
headphones jack
6
memory button
13
sensors connector
7
start/pause button (measurement
mode)
14
protective insert
Technical specifications of the Receiver are listed in
Appendix A
.
Screen controls are listed in
Appendix B
.
2.1 Preparing Receiver AP-027 for operation
Before the first operation of the receiver remove the protective
insert position 14, Fig. 2.1Insert the receiver into the holder fig. 2.2 p.1
Insert one end of the holder under the rubber part of the receiver
fig.2.2 p. 2 Insert the other end of the holder under the rubber part of
the receiver fig.2.2 p. 3
The receiver is ready for operation fig. 2.2 p. 4
9
3
2
1
6
5
7
8
4
10
11
12
Fig. 2.2
13
14
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3. Operation sequence in liquids leak detection mode
Fig. 3.1
CAUTION!!
During leak detection works one should have a detailed diagram of underground
utilities. If there is no diagram, a preliminary pipeline route location should be
conducted. The level of valid signal and signal interference depends on the accuracy
of acoustic sensor placement over the pipeline axis.
Check the charge status of the batteries (
the charge
should be no less than 4,0 V
). If the battery charge is low,
replace the batteries
Check the accuracy of
sensor connection. If a «no
sensor» symbol is lit on the
display
,,check if the
sensor is connected
Select the received
signal type «leak»
by any of
▲/▼
buttons
Set the necessary
level of receiver display
backlighting, using
◄/►
buttons
Equipment used:
3.
In the start window on the receiver display:
2.
Turn on the
Receiver AP-027
1.
Connect acoustic sensor and
headphones to the corresponding
receiver connections
3.1 Connection of sensors and check the receiver operability
Leak detection АP-027
(10-06-15)
Acoustic sensor
AD-227
Receiver
AP 027
Headphones
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3.2 Preliminary route inspection
1
.
Place the acoustic sensor over
the supposed pipeline location
2.
Switch on the
measurement mode
using the button
3.
Set the
broadband mode
, by pressing
the filter
button.
4.
Set input signal level using
sensitivity buttons
и
Narrow scale indicator
readings should be preferably
at 50…90% of maximum value
5.
Set the headphones to
required volume
using
buttons
◄/►
6.
As you move along the route, move the acoustic sensor
in increments of approx.1 m. and place markers in the
spots where the signal level is the highest
7.
We recommend you to record
the points where signal level is the
highest into the memory of the
device by pressing the memory
button
7.1.
Browse the saved memory (Appendix B), select the
areas with the highest signal and search for leaks in the
marked spots If on the extraneous background sounds you
can hear the distinctive sound of the leak,
set the filter
(p.3.3)
. If not - move the sensor to another proposed
location
The receiver has an ability
to record/view 30 saved
signal levels Output signal
level values are recorded every
time by pressing the memory
button
valid value signal leve
Number of the
memory cell.
Selection of the
required memory
cell is made by
◄/►
buttons
levels of useful signal, fixed by memory buttons
pressings
Signal level
МAX
Leak detection АP-027
(10-06-15)
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NOTES:
- It is recommended to turn off the measurement mode by pressing the button
before moving the sensor, in order to save the receiver settings and eliminate unpleasant
noise in the headphones.
- During leak detection it is not recommended to move the sensor and use the memory
functionary earlier than 10 seconds after placing the sensor on the ground and turning on
the measurement mode
- Do not change control settings as you move along the route, in order to save the relative
value of signal level.
In order to enter the review mode:
1.
Turn off measurement
mode by pressing
2.
Press the memory
button
3.
Review memorized fields
using the
◄/►
buttons
In order to leave memory mode press button
- you enter the launch window, and then to
return to the measurement mode press «start»
When the receiver is powered off, the recorded data is not saved!
3.3 Conduct fine tuning of receiver filter
General principle of the filter setting is the gradual narrowing of band pass in order to isolate the
sound of leakage and maximum suppression of all other sounds.
1.
Place the acoustic sensor
over the suspected leak point
and commence filter setup.
2.
On hearing a sound like
the sound of fluid leakage turn
on the band pass filter by the
button
3.
Switch to Spectrum
window by pressing visual
indication type button
twice
Suspected
leak point
Leak detection АP-027
(10-06-15)
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5.
Turn on the filter by pressing
the frequency button
. A
symbol of low frequencies
suppressing will appear on the
display
6.
Using the buttons
◄/►
increase the frequency of the
lower «cut-off»
as
long as it is not detrimental to
the intelligibility of the sound
in the headphones
7.
Press
the
frequency
button . A symbol of higher
frequencies will appear on the
display
8.
Using the buttons
◄/►
decrease the frequency of the
«cut-off»
as long
as it is not detrimental to the
intelligibility of the sound in the
headphones.
9.
Check the filtered signal
quality shown in the Spectrum
graph
(see p. 4)
. Highest
number of black stripes (valid
signal) and lowest number
of light stripes (interference)
signifies correct choice of filter
10. Switch to Scale mode
by pressing visual indication
button
. Without changing
the settings, examine the
suspected leak area
as
described above in sections
3.2 paragraphs 5-8
Frequencies where light segments prevail over the dark ones, are the most likely the
interference frequencies that should be suppressed by pass band filter
4.
Conduct an analysis of the generated spectrum
dark segments
correspond
to the frequency
components of valid
(continuous) signal
light to the frequency
components of accidental
interference
Leak point usually corresponds to a point where valid
signal level is the highest.(fig.3.2).
If the same intensity of the signal level is observed at a
distance of 2 to 5 m, then the leak point is located in the
middle of such a segment.
11.
Mark the suspected leak location.
12.
Turn off the device
Fig.3.2
Leak detection АP-027
(10-06-15)
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Appendix A
Receiver AP-027 Technical specifications
PARAMETER
ROUTE LOCATION
LEAK LOCATION
Type of received signal
Continuous/pulse
Continuous signal
Selectable band pass filter
frequencies
Central frequency
of the quasi-resonant filter
50/60Hz,100…450Hz through 50Hz,
120…540Hz through 60Hz, 512Hz ,
1024Hz, 8192Hz, 33kHz.
lower range limit
0,1/0,15/0,21/0,31/0,45/0,65/
0,95/1,38kHz
upper range limit
2,00/1,38/0,95/0,65/0,45/0,31/0,21/
0,15kHz
Broadband
0,05…8,6 kHz
0,09…2,20 kHz
Amplification factor sensor
100 dB
Visual indication
LCD - symbols and values of selected modes and parameters
-animated scale for input signal level
-numeric value and animated scale of output signal level
-graph (moving diagram) of the output signal level
-output signal frequency spectrum
-numerical and graphic display of output signal levels recorded to
the memory
Audio indication
Headphones –natural broadband or filtered signal
Headphones
-FM synthesized sound.
-
Built-in speaker -
FM synthesized sound
-
Batteries
Voltage 4…7 V.
- 4 AA type batteries, 1.2V.
- 4 AA type alkaline batteries, 1.5V.
Number of values stored in
memory
30
Duration of continuous work,
no less than
20 hours
Operating temperature
minus 20С…to +50С
Protection class
IP54
Receiver AP-027 dimensions
220
×
102
×
42 (mm)
Acoustic sensor AD-227
dimensions
105 х 110
Electromagnetic sensor
EMD-247 dimensions
650 х 70 (shipping mode)
1110 х 180 (operating mode)
Receiver AP-027 weight
0,46 kg
Sensor AD-227 weight
1,5
Sensor EMD-247 weight
0,5
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Appendix B
Switching-on the receiver
1. Switching-on the receiver
When the receiver is switched on, the display shows the following sequence: manufacturer’s
trademark (logo) «TECHNO-AC», Business card of the Receiver with the Software version number
and the Start window (fig.А.1).
When switching the receiver with the button
while
holding
button , after Business card Window of network
frequency selection will appear. Frequency of 50 Hz or
60 Hz is selected by any of button
◄/►
, and «input» with
transfer to Start window is performed by pressing the button again .
2. The start window
The start window displays the following information:
Fig.А.1
voltage indicator
When power voltage
≤
4.0V after
switching on the warning signal
is heard, when power voltage
≤
3.8V there is the image of fully
discharged battery
and the
device will automatically
switch off after
type of the sensor
connected
Sensor not connected
Acoustic sensor(AD)
Electromagnetic sensor(EMD)
type of signal received
when working with AD
- «sound of liquid leakage (continuous acoustic signal)
- «sound generated by an impact (acoustic impulses during transmitter
operation)
During work with electromagnetic sensor
-continuous signal from the power network, cathode protection of
trace generator
- pulsed signal of trace generator
- Dual-frequency signal of the trace generator
indicator backlighting intensity
There are four levels of indicator
backlighting intensity
/
/
/
Fig. А.2
parameters of detector of
harmonic component with net
frequency
№ and frequency of harmonic
component of net frequency (for the
second filter)
indicators of used buttons
Type of signal received, available
for this of the sensor is selected
by
▲/▼
buttons
№ of harmonic component of
the net frequency (for the second
filter) is selected by buttons
/
Indicator backlighting intensity is
selected by the buttons
◄/►
Return to the Start Window from measurement mode is performed by pressing
((pause
mode) and
.
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3. Scale window
When measurement mode is selected (except the two-frequency), Scale working window
appears first fig.А.3.
Fig. А.3
Visual indication button can lead to the indication modes
of Graph (fig.А.4) and Acoustic
signal spectrum(fig.А.5) or Power range spectrum (fig.А.6) and Broadband electromagnetic
range (fig.А.7).
Sensitivity
- sensitivity symbol
«_dB»
-the value of input
amplification factor(0…62dB
adjusted by using
/
)
- ensitivity scale
Two-segment scale
reflects the processed signal
Light segment:
- in the mode
-current
value of the signal (valid +
interference):
- in the mode
- current
value of the signal for the previous
second (pulse amplitude).
Dark segment:
-in the mode
- level of the
processed valid signal;
- in the modes
and
-current signal
level(valid+ interference)
A completely filled scale
signifies output overload
Filtering
Displays the frequency range
scales with numerical and graphical
representation of the pass band
During work with AD:
- pass band filter
- broadband
During work with EMD:
- central frequency of the
narrow band filter
- broadband
Presence of the indicator
signifies
possibility of filter parameter
adjustment.. The filter is switched on
and off by using the filter button
Scale
Contains a amplification
factor value
×
1/2/4/8.
- indicator of buttons used
▲/▼
Sound
- «natural» sound in the
headphones (volume level 1to 8
can be adjusted by
◄/►
buttons)
--«synthesized» sound to
headphones (volume level 1 to 8 can
be adjusted by
◄/►
buttons)
- «synthesized» sound in built-in
speaker (volume level of the built-in
speaker can not be adjusted).
Narrow scale
Displays the level of
input signal
A filled upscale signifies input
overload. Overload can be
eliminated and the optimal level of
input signal can be set by using the
/
Figure
Displays the level of
processed
signal
- in the mode
- valid signal
level value
- in the mode
- current
signal level value
- in the modes
and
-
maximum current signal level value
for the previous second (pulse
amplitude)
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4. Graph window
The graph displays the changes in processed signal levels over time and moves at constant
speed from right to left.
The graph
shows processed signal
- in mode
- change in the level of processed valid signal over time
- in modes
,
and
- change in the level of current signal value over time
Narrow scale
Displays the level of input signal.
A filled upscale signifies input overload.
Overload can be eliminated and he
optimal level of input signal can be set
by using the
/
Figure
Displays the level of processed signal
- in the mode
valid value of the signal
- in the mode
- current value of the signal
- in the mode
and
maximum current value of the signal for the previous second (pulse amplitude)
5. Acoustic signal spectrum window
It displays the spectrum of the filtered signal.
When working with EMD switching the window can have the following view :
Fig. А.4
Fig. А.5
dark segments
correspond to the frequency
components of valid
(«continuous») signal
light segments
correspond to frequency
components of accidental
interference
Band pass of the filter on the figure - 0,21…0,95kHz. It is possible to switch over
to adjusting the image scale at vertical by means of
▲/▼
and volume in headphones
by
◄/►
. it is possible to switch over to adjusting the pass band and vise versa by means of
(
→◄/►→
).
The frequencies at which light segments significantly predominate over dark probably are the
interference frequencies to be suppressed by the band pass filter.
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6. Power range spectrum window
The window is available in the electromagnetic mode
of broadband
and can be called for by the
additional touch of a button
. The display shows
the industrial frequency spectrum of «10 ... 640 Hz».
Maximum of emission spectrum of the power cable falls
to 50/60 Hz.
Two-segment columns show the current and minimum
values of the frequency components of the signal.
Typically, the spectrum contains harmonic components
which are dependent on the form of voltage and current in the load. There can be often present
strong odd harmonic components at frequencies of 150/180, 250/300 (Hz), etc.
7. Broadband electromagnetic spectrum window
The window is available in the electromagnetic mode
of broadband
and can be called for by
pressing the button
. The display shows the industrial
frequency spectrum of «0.40…8.60 kHz».
Two-segment columns display the current and
minimum values of the frequency components of the
signal.
8. Memory window
Fig. А.6
Fig. А.7
value of the valid signal level
Number of memory
cells. Selection of
memory cells is
performed by
◄/►
buttons
levels of useful signal, fixed by memory buttons
pressings
The receiver has an ability to record/view
30 saved signal levels (fig.А.8). Output
signal level values are recorded every time
the memory button
pos. 6.fig.2.1 is
pressed in the measurement mode.
The memory of the receiver provides 30
cells for filling, any subsequent record is
the last one.
The review mode is called up by the
memory button .
Fig. А.8
In order to do that:
turn off measurement mode by pressing
, the start/pause button ,
review memorized fields using
◄/►
buttons.
Leaving Memory window for the previous measurement mode occurs by sequentially pressing
memory button and measurement
buttons.
When the receiver is powered off, the recorded data is not saved.
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9. Audio indication
The sound is output to the headphones or the built-in sound transmitter. Three categories of
sound are used:
- «Natural» without filtering (broadband) to the phones;
- «Natural» filtered (narrowband) to the phones;
- «Synthetic» (modulation of sound frequency by the level of the filtered signal) to the phones
or to the built-in transmitter.
When working with AD only «natural» sound is used.
When working with EMD in the mode «natural sound to the phones» the adopted
«high active» frequency 8192Hz and 33kHz, before playing, are converted into a well-acceptable
«low» frequencies of 838Hz and 1574Hz respectively.
«Synthesized» sound is created by a principle: «Frequency of the audible sound signal (pitch)
is directly proportional to the signal level,» and the volume does not depend on the level of the
received signal. «Synthesized» sound is played while values
«figure
≥
2».
The volume of the headphones
is set by the operator using buttons
◄/►
. Two pressings
correspond to the one change of figure on the display «8 ... 1/1…8».
Volume of the «synthesized» sound on the built-in transmitter can not be regulated.