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HWM Touch Pro Series 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.
1
MAN-068-0001-L April 2022.

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Summary of Contents for HWM Touch Pro Series

  • Page 1 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.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Introduction and preparation for use ................5 Documentation and Support of Product ..............5 Safety Considerations ....................7 Operating Temperature .................... 8 Battery Installation and Charging ................8 1.4.1 Base Unit – Battery pack installation ..............8 1.4.2 Outstation Units –...
  • Page 3 Base unit operation ......................30 Introduction ......................30 Language selection ....................31 Main screen (a quick tour) ..................32 Selection of sensor inputs ..................38 Survey mode (quickly check for leaks) ................39 Operation ......................... 39 Settings for Survey Mode (range and filters) ............40 Using Headphones ......................
  • Page 4 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 Troubleshooting ......................84 Maintenance, Service and Repair ................89 13.1 Routine care and maintenance................

  • Page 5: Introduction And Preparation For Use

    NTRODUCTION 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.
  • Page 6 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.

  • Page 7: Safety Considerations

    1.2 S AFETY ONSIDERATIONS 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.

  • Page 8: Operating Temperature

    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.

  • Page 9: Outstation Units - Battery Pack Installation

    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...

  • Page 10: Overview

    VERVIEW 2.1 I NTRODUCTION 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.

  • Page 11: The Correlation Principle

    2.2 T ORRELATION RINCIPLE 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.

  • Page 12: System Overview

    • Hydrophone 2 Bleed valve accessory kit. • Adaptor Options and tools • (These must first be discussed with your HWM representative, to confirm availability. (Cables and Spares) Adaptors required vary according to local needs). Consumable items (various) • The additional equipment is usually supplied within an additional carry-case.

  • Page 13: Accelerometer Sensors

    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.

  • Page 14: Hydrophone-2 Sensors

    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;...

  • Page 15: Base Unit

    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.

  • Page 16: Outstations

    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).

  • Page 17: Headphones

    HWM-Water Ltd supplies an optional choice of quality headphones which include the following (or similar) models:...

  • Page 18: Charging Case

    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.
  • Page 19 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.

  • Page 20: Optional Equipment

    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.

  • Page 21: Hydrophone Thread Adapters

    Thread adapters available for Hydrophone-2 include: Hydrophone-2 to London Round Thread adapter. • Hydrophone-2 to Belfast adapter. • Hydrophone-2 to Euro adapter. • For information on the availability of other adapters, please discuss with your HWM representative. 2.5 O & H PERATING RANGES CCELEROMETER YDROPHONE Using hydrophones, the operating range between outstations can be very high particularly during a quiet period of the day.

  • Page 22: Installation Of Accelerometer Sensor

    Trunk Mains Pipe Material Accelerometers Hydrophones Iron, Steel 500 - 800 metres 2000 - 3000 + metres A/C, Concrete 400 - 600 metres 1000 - 2500 + metres Plastic 100 - 200 metres 500 - 1500 + metres 2.6 I NSTALLATION OF CCELEROMETER ENSOR...

  • Page 23: Installation Of Hydrophone Sensor

    2.7 I NSTALLATION OF YDROPHONE ENSOR The Hydrophone 2 makes a wet connection with the water pipe network (i.e., The sensor is in direct contact with the water column). (The picture opposite shows Hydrophone 2 being used without any adaptor within a thread- compatible boundary box).
  • Page 24 Note: Hydrophone 2 is an updated version of an earlier Hydrophone sensor design from HWM, now known as Hydrophone 1. The earlier version has different electrical and mechanical connections. It required different cables and an in-line amplifier box (see pictures below).

  • Page 25: The Hydrophone 2 Kit (Hydrophone Pair And Carry-Case)

    YDROPHONE PAIR AND CARRY CASE The Hydrophone 2 kit is an upgrade option for HWM correlator systems ; these are normally supplied with just a pair of accelerometer type sensors (with a magnetic base coupling). However, certain correlator systems (e.g., the Touch Pro TM) also include the Hydrophone kit as standard.
  • Page 26 A fitting tool is available to assist in tightening and releasing certain adaptors that are required to be fitted first in order to make the valve thread compatible with Hydrophone 2. A fitting tool is available to assist in tightening and releasing the Hydrophone. It adapts a 1-1/4 inch square peg (suitable for a 1-1/4 inch hydrant key) to a 50mm wide U-shaped end (suitable for engaging...

  • Page 27: Equipment: Connectors, Controls, Indicators, Deployment

    QUIPMENT ONNECTORS CONTROLS INDICATORS DEPLOYMENT This section covers Touch Pro operating procedures and describes the functions and effects of the various keys and controls. Important: Always press the keys on the touch screen with a touch screen stylus or using fingernails. Do not use sharp objects. The Touch Pro features an intuitive user interface designed to perform accurate correlation with the minimum number of key presses.

  • Page 28: Outstation Units

    3.2 O UTSTATION UNITS 3.2.1 Connecting up Once the batteries have been installed and charged in the Outstations: Connect the antenna to the connector • Connect shown. Sensor cable here Connect the sensor (via its cable) to the • connector shown. Connect The wired headphones option can be •...

  • Page 29: Leds - Operation And Meaning

    A Red flashing LED indicates the battery requires immediate charging. HWM-Water Ltd recommends that no correlations are attempted when the outstation requires charging, as this may interfere with the quality of the correlation result. When the outstation is initially connected to a sensor the LED should flash 10 times quickly.

  • Page 30: Base Unit Operation

    If the outstation is being charged whilst it is switched on the Tri-colour LED will flash 10 times faster than normal, and will only show green. When charging completes the LED will return to its normal flashing rate. The case charger automatically stops charging temporarily when the case button is pressed.

  • Page 31: Language Selection

    located at each of the positions). The user can investigate each position further (e.g., by using a ground microphone) before considering excavation and remedial works. The correlator also includes a headset option for the user to listen to the sounds being picked up by the sensors ;...

  • Page 32: Main Screen (A Quick Tour)

    4.3 M AIN SCREEN A QUICK TOUR After powering the unit, some initial splash screens are displayed, followed by the main screen (shown below). The main screen is the top of any menu selections. The buttons at the top and bottom of the screen sometimes start operations;...
  • Page 33 A button’s colour gives an indication of the availability of its function: A greyed-out button indicates the function is not currently • selectable (usually incompatible with the current operation of the unit). A blue button indicates the function is available to be selected. •...
  • Page 34 Below the red and blue outstation symbols there is an information panel. The radio inside each outstation, which transmits data to the base unit automatically, switches on when a sensor is connected. The user can switch between high and low power transmission, as appropriate to its position relative to the base unit.
  • Page 35 (The peak under consideration is first selected, with the selection being indicated by a dotted line). - A high peak (i.e., an SNR of 20:1 or more) will be a strong clearly defined peak which equates to a good correlation. A coloured light (large dot) is displayed next to the SNR result, indicating a judgement of the confidence for the correlation.
  • Page 36 There are buttons displayed on each of the screens the unit displays. Whilst some buttons are common across most screens, the buttons can also vary according to the screen being viewed. The various screens are organised in a hierarchical structure for navigation purposes.
  • Page 37 Certain buttons on the top of the main screen are used to start sound processing by the correlator unit (alternatively, the unit could be paused from such activities). (e.g. The ‘Start’ button or the ‘Survey’ button ; these are mutually exclusive selections of operation ;...

  • Page 38: Selection Of Sensor Inputs

    4.4 S ELECTION OF SENSOR INPUTS The system can have up to three sensors connected; one at each of two outstations and one directly connected to the base unit. Correlation can only be between two units, so the inputs being used must be selected first. The current selections are shown on the main display.

  • Page 39: Survey Mode (Quickly Check For Leaks)

    URVEY MODE QUICKLY CHECK FOR LEAKS 5.1 O PERATION Survey Mode provides a simplified correlation display that enables you to check large distances rapidly for the presence of leaks. (No pipe material settings are required as all of the filters can be set to ‘open’). The survey mode helps the user to identify whether there is a leak on the pipe ;...

  • Page 40: Settings For Survey Mode (Range And Filters)

    5.2 S ETTINGS FOR URVEY RANGE AND FILTERS There are two settings for survey mode: Range selection (timespan required for the correlation software). • Filter selection (to remove unwanted frequencies). • The settings can be made from the “Rapid Survey Configuration” screen, accessed as follows: (Main screen) →...

  • Page 41: Using Headphones

    SING EADPHONES The operator can work with the correlator using the display only. However, the correlator console has a useful headphone output and is normally supplied with headphones. Refer to section 2.3.5 and 2.3.3 for typical headphone options and also the connector used on the console for attachment ;...
  • Page 42 In the above example, the operator can clearly see that sound is being received from both the red and blue outstations. There is no audio, however, because both left and right channels have been muted (the Left and Right selections are set to ‘audio off’). The operator can now use the buttons on the screen to select the sound that is heard through the left and right speakers on the headphones.

  • Page 43: Correlation (Leak Localisation)

    ORRELATION LEAK LOCALISATION 7.1 C ORRELATION USING THE OUCH Before beginning a correlation, ensure that each sensor is positioned at either end of the pipework under investigation, and has been connected either to an outstation or to the main base unit. When a sensor is connected to an outstation it automatically transmits its signal.
  • Page 44 Note: If the pipe is built of multiple sections of different types of material or size, enter the first one. After selecting the required pipe material, the operator is automatically taken to another screen; This is the Pipe Diameter Selection for the chosen pipe material. A range of pipe diameters is displayed...
  • Page 45 The operator is then taken to the Pipe Length Input Screen. Input the length of the current section of pipe using an on-screen keypad, as shown opposite. DELETE When the pipe length has been input, the buttons “Multi-Section Editor” and “Start Correlation”...
  • Page 46 The Multi Section Editor button produces a ‘Multi-Section Definition’ screen. This displays the details of the first length of pipe input. In the example shown opposite, 250m of Ductile iron pipe has been entered. Additional parameters including the speed of sound through the audio path are also shown.
  • Page 47 Then input the pipe diameter. Finally, input the pipe length and tap on the “Accept Details” button. The unit returns to the Multi- Section Definition screen, which now displays the two different pipe materials and lengths (and now 3 possible insert locations).
  • Page 48 Additional sections of pipe material can be added by selecting the “Inset” button until the full length of pipe located between the two outstations has been input. Then select the “Start Correlation” button to proceed. The pipe lengths are shown below the graph area, colour coded according to...
  • Page 49 Helpful Note: If, following a correlation, the operator wishes to perform a new correlation, the Pipe Material screen will give the operator the option of selecting “Use Existing Definition” to select the pipe materials used in the previous correlation. Note that the ‘Start’ and ‘Survey’ buttons will change whilst the user is driving a correlation or survey (see below for an example): The ‘Survey’...

  • Page 50: Tools To Assist Correlation

    7.2 T OOLS TO ASSIST CORRELATION 7.2.1 Zoom feature The cursor can be re-positioned manually, by tapping the screen in the desired new location. To improve the resolution, you can first tap on the ‘Zoom’ button, which is usually located at the bottom of the main screen. The zoom function centres on the cursor position.

  • Page 51: Auto-Cursor Feature

    7.2.2 Auto-Cursor feature To assist in positioning the cursor onto the peak, you can tap on the ‘Auto Cursor’ button, which is usually located at the bottom of the main screen. When active (displayed as red), cursor positioning will no longer be manual. The Auto Cursor can be turned off at any time by tapping the button again.

  • Page 52: Peak Suppress Feature

    7.2.3 Peak Suppress feature Peak suppression allows the operator to remove an unwanted peak from the correlation result. This is useful when the source of that peak has been identified as a non-leak. By suppressing this, the unit will correlate ignoring the sound levels being produced at this location on the pipe.
  • Page 53 In the example shown below, the grey area shows the original peak (at 50ms) is suppressed. If Auto-Cursor is enabled, it will jump to the new peak, which is outside of the suppressed area. … The distance results (from red and blue outstations) have been updated...

  • Page 54: Afis (Filter Optimization) Feature

    7.2.4 AFIS (Filter Optimization) feature Touch Pro provides default filter settings for a wide range of different pipe materials and sizes. However, due to the number of unknown variables that can change the frequency of leak noise, default filter settings can never be optimised for every leak situation.
  • Page 55 The settings (above) are related to the ‘Optimise Filters’ button, which is shown opposite. The button is displayed from the main screen after the ‘menu’ button has been activated. When Filter Optimisation Mode setting is set to: ‘Disabled’: • The Optimise Filters button is ‘greyed out’ and has no function. ‘Manual’: •...

  • Page 56: Filter Settings - Manual Adjustment

    7.2.5 Filter Settings – Manual Adjustment Helpful Note: This section is for expert users only… Touch Pro uses a unique Automated Filtering Intelligence System (AFIS) which automatically runs up to 55 different filter combinations on the correlation, checking the quality of the result and optimizing the filters until the best result is obtained.
  • Page 57 The following screen is displayed: This screen shows the frequency spectrum of the noise being received. The range is 0-5 kHz. Three graphs are displayed: The top graph shows the noise being received from the red outstation. • Noise data is displayed in red. The middle graph shows noise being received from the blue outstation.
  • Page 58 The only the sound frequencies in the being displayed within the white background area are used to perform the correlation. To reject low frequencies: Press the “Set Low Cut-off” button and then touch the screen at the point on the graph that the cut off is to be applied up to.
  • Page 59 Once finished, tap on “Accept” to apply the settings to the correlation. The function of the remaining buttons is as follows: The “Cancel” button cancels the settings and returns you to the main correlation • screen. The “Clear all Filters” button removes all of the grey filtered areas. •...

  • Page 60: File Functions: Saving And Re-Opening A Correlation

    7.3 F ILE FUNCTIONS AVING AND RE OPENING A CORRELATION The Touch Pro includes a file system, allowing information to be saved as data files. This includes the ability to be able to save and re-open correlations. This can be used to re- examine the correlation later in time or it can also be used as an input to the Touch Pro ‘Compute Mode’...

  • Page 61: Saving A Correlation Result

    7.3.1 Saving a Correlation Result Tap the “Save” button. Enter information about the correlation (e.g., location, date, etc). The operator can toggle between numbers and letters by selecting the “ALPHA” or “NUMERIC” buttons that appear at the bottom left of the screen.

  • Page 62: Opening A Previously Saved Correlation Result

    7.3.2 Opening a Previously Saved Correlation Result Tap the “Open” button. The unit displays a list of saved correlation results (in the left- hand panel). The operator can now select a file to open by using the ‘Select Up’ and ‘Select Down’...

  • Page 63: Compute Mode - Improving Leak Location Accuracy

    7.4 C – I OMPUTE MPROVING LEAK LOCATION ACCURACY 7.4.1 Purpose /Overview It should be noted that the leak position measurements described so far could be based on an estimated velocity of sound within the pipe (especially when the structure of the pipe network is unknown).

  • Page 64: Using Compute Mode

    Then, move one outstation and repeat the correlation procedure, inputting the new pipe length and saving the new correlation result. HWM-Water Ltd recommends at least three separate correlations be conducted in this manner. The more times this correlation process is repeated, the more data is available to improve the overall accuracy of the combined correlation graph.
  • Page 65 When ‘Compute’ is selected, the ‘Sound Speed Computation’ screen will be displayed. It initially looks as shown opposite. The screen includes a set of buttons that can be used to drive the file system of the Touch Pro. These operate in a similar manner to that described in section 7.3, and...
  • Page 66 The selected correlation result will now appear as a cross hair on the Sound Speed Computation screen, as shown in the example opposite. Repeat this procedure to add all of the correlation results conducted on the pipe into the Sound Speed Computation screen. In the example opposite, three correlation...
  • Page 67 The markers for the correlation results should give a good approximation to points on a straight line when plotted on the graph (the more points available on the graph, the better it will be to see where the line should be drawn). However, if there are some “outlying”...

  • Page 68: Understanding The Data Produced From A Computation

    7.4.3 Understanding the Data Produced from a Computation Since the correlations had sensors placed at different distances between them, the results will also show different time delays. The graph has to accommodate all correlation results. Therefore … The X-axis of the graph shows distance •...

  • Page 69: Material Database (Edit / Define Pipe Materials)

    ATERIAL ATABASE DEFINE PIPE MATERIALS The Touch Pro base unit has a built-in database of pipes of differing material types and diameters. Each pipe material type and pipe diameter is pre-programmed with the expected speed of sound traveling through it. This data enables the correlator to obtain a good estimate for the speed sound in a pipe network when doing correlations, allowing it to pinpoint the distance from the sensors to the leak (when the correct pipe material(s) and diameter(s) are identified).
  • Page 70 You will be returned to the Materials Database, where the new name will be displayed. To edit the Sound speeds for a pipe material: Select the pipe material to be edited (tap on a material button ; it will turn red) and then tap on “Edit Sound Speeds”.

  • Page 71: Multi-Graph Modes

    ULTI GRAPH MODES 9.1 C ORRELATION ISPLAY (1 H / 3 H ISTOGRAM ISTOGRAM The default setting is to display a Single Histogram graph during the correlation. For a single graph, with AFIS disabled, only one set of audio filter settings can be applied. It is however possible for the Touch-Pro to display three separate graphs, with each using its own manual filter settings.
  • Page 72 Next to each graph there is a ‘filter icon’, which also behaves as a button. The images displayed on the icon will vary, according to what filters are set. The filter type images are spread across 2 lines and includes frequency details. The images represent the following: Low-pass filter High pass filter...
  • Page 73 An example of a setup for a High pass filter response is shown opposite. High-pass filter (Implemented by ‘set low cutoff’ button) An example of a setup for a Low pass filter response is shown opposite. Low-pass filter (Implemented by ‘set high cutoff’ button) An example of a setup for a Band pass filter response is shown opposite.
  • Page 74 For convenience, each correlation graph is numbered 1, 2 and 3. Pressing one of these numbers will expand that particular graph. Other graphs shown on the screen will be reduced in size. For example, if the middle graph were required, pressing the blue button labelled “2”, shown to the left of the graph, will change the...

  • Page 75: Snapshot Options (Graph Copy)

    9.2 S NAPSHOT PTIONS RAPH The Snapshot feature enables the operator to record (for comparison purposes) a still image of the correlation graph at any time during a real-time correlation. This is useful for highlighting temporary noises such as a flushing toilet or sudden traffic noise that might interfere with the correlation result.
  • Page 76 The “Snapshot, Restart” button makes a copy of the current result and then • starts a new correlation (displayed on the on the lower graph area). The Snapshot feature effectively enables the operator to compare noise levels at different points during the correlation process. When the “”Snapshot. Continue” or “Snapshot.

  • Page 77: Velocity Calculation (Sound Speed Calculator Tool)

    10 V ELOCITY ALCULATION SOUND SPEED CALCULATOR TOOL The Touch Pro correlator contains a handy tool for calculating the speed of sound within a pipe or pipe network. It has various pre-conditions: The length of the pipe must be known. •...

  • Page 78: Out-Of-Bracket Calculations

    10.1 O BRACKET CALCULATIONS The out-of-bracket sound calculation is the easiest to understand. If the sound source is outside of the space between the connectors, it reaches one sensor first (the near sensor). It then travels the full length of the pipe between sensors and is picked up by the other sensor (the far sensor).

  • Page 79: Using The Velocity Calculation Result

    The user must input the distance to one of the sensors using the keypad. The results are calculated immediately and shown in the Calculation panel. 10.3 U SING THE VELOCITY CALCULATION RESULT A calculated velocity can either be discarded or used. Tap on the ‘Discard’...

  • Page 80: Status And Setting Options

    11 S TATUS AND ETTING OPTIONS 11.1 S ETTING THE ATE AND The date and time can be set on the “Set Date and Time” Screen, which is accessed as follows: (Main screen) → Setup → Advanced → Set Clock The date and time can be adjusted by using the relevant up and...

  • Page 81: Displaying Radio Details And Battery Information

    The RSSI level can be a useful diagnostic tool to check that the signal is being received OK from the outstations. Pressing the “Exit” button will return you to the Setup screen. Note: The product name may vary according to market region. Note: The “Service” button is for use only by HWM-Water Ltd engineering personnel.

  • Page 82: Setting Units Of Measure

    Tap a button to make a selection. The selected option is displayed in red. Note: This setting is for advanced user only. HWM-Water Ltd recommends that the pre-set time domain correlation technique be used. However, it should be noted that Frequency Domain may speed up correlations...

  • Page 83: Sharpness Settings

    11.6 S HARPNESS ETTINGS The Touch Pro incorporates a sharpening function to help pinpoint leaks where the correlation data has broad rounded peaks, as commonly happens with plastic materials. There are two sharpness values, one used for plastic pipes and one for all other materials.

  • Page 84: Troubleshooting

    12 T ROUBLESHOOTING Problem: There is no RF Signal being received from the Outstations. Recommended Actions … Check that the outstations are switched on. • Check that the antenna is connected, and that the RF connector is clean. • Check that the outstation is registering the connected sensor (LED Flashes). •...
  • Page 85 On the Base Unit check in the display screen that the outstation frequency is • correct and that the RSSI should approximately -80dBm or less. Check the battery level shown for the base is at a minimum 7.2V. If standing close to one of the outstations and receiving no RF signal from the •...
  • Page 86 Note: Don’t stand too close to sensor when listening through headphones to avoid audio feedback. Problem: The Main Correlation Screen displays the warning message “Correlation out of bracket”. Recommended Actions … This message means that a possible leak has been found, but it is outside of the •...
  • Page 87 o Open a tap on the pipe network and use the velocity check facility on the Touch Pro. Perform the correlation using this velocity reading o Use Compute mode on the Touch Pro to give both velocity reading and a leak position based on more than one correlation.
  • Page 88 When power is applied to the case charger, the LED should initially light up to • give the current battery level of any connected units. After 5 seconds the LEDs will go out and the charging will begin. If a unit is connected and the LED doesn’t light this means that either the battery is defective, or the connection is faulty for that unit.

  • Page 89: Maintenance, Service And Repair

    The following care and maintenance procedures are designed to keep your Touch Pro system in good general working order. If any part of your Touch Pro system does not work correctly, please contact the Service Team at HWM-Water Ltd or your local Touch Pro distributor.
  • Page 90 C and there is a safety cut out to stop this from happening. To prevent deterioration or damage to the battery: Do not drop or subject to strong physical • shock. Batteries should only be charged using a • Touch Pro charger supplied by HWM...

  • Page 91: Replaceable Parts

    Only batteries with the correct specification and type must be used. • These are available from HWM-Water Ltd should replacements be required. Gaskets / Seals / O-Rings Check condition of any gaskets, O-rings, or other seals on the Hydrophone 2 or any •...

  • Page 92: Return Of Product For Service Or Repair

    If returning to HWM, this can be done by completing the on-line RMA form: https://www.hwmglobal.com/hwm-rma/ If soiled, ensure the unit is cleaned with a mild cleaning solution and soft brush, disinfected, and dried prior to shipment.
  • Page 93 14 APPENDIX 1 … RINCIPLES OF OCATION SING OISE ORRELATION This Appendix section of the Touch Pro Operating Manual provides an overview of the basic theory and principles of leak location using leak noise correlation techniques. LEAK NOISE When a liquid under pressure escapes from a pipeline it creates a sound pressure wave (leak noise) which travels along the pipe from the exit point (see Diagram 1).
  • Page 94 distance ‘L’ towards the Red sensor but has some distance yet to travel (‘N’). This extra travel time creates a time-difference between the signals arriving at the Red and Blue sensors. The time-difference is referred to as Td. Diagram 2 (V x Td) Touch Pro compares the two sound signals from the outstations and determines the extra time taken for the sound wave to travel the extra distance, ‘N’, to reach the Red...
  • Page 95 As we wish to find L, which is the distance between the Blue sensor and the leak point, we can rearrange the equation to: D - N D – (V x Td) So, we can measure the distance D between the sensors (following the pipe network) and can estimate the velocity V from our knowledge of the pipe size and material.
  • Page 96 ‘T’ CONNECTIONS The distance D which you have to key-in to Touch Pro refers to the total length of pipe between the sensors. If the sensors are attached to T connections, then the length of the T network must be included in D. Diagram 3 Sensors Connected to Fittings on T Connections Sensor...
  • Page 97 Diagram 5 Sensor Sensor The Leak (shown in Diagram 5) will be indicated at the left T connection that is circled. Action: Move the left-hand sensor further to the left and try again. Diagram 6 Sensor Sensor Leak The leak (shown in diagram 6) will be indicated at the right-hand T connection that is circled.
  • Page 98 Diagram 7 Sensor Leak Sensor The Leak (shown in Diagram 7) will be indicated correctly. Diagram 8 Sensor Sensor Leak The Leak (shown in Diagram 8) will be indicated at T connection that is circled.. Action: Move either sensor to a fitting down the T connection (e.g., to P) and try again.
  • Page 99 Mixed pipes Diagram 9 The speed or velocity at which leak noise travels is greatly dependent on pipe material. Different pipe materials give different velocities. To locate a leak in a pipe run made up of mixed materials, the velocities applicable to each material, and the length of each pipe must be used.
  • Page 100 COMPUTE MODE THEORY Compute Mode is a special Touch Pro operating feature which can improve the overall accuracy of correlation surveys. In Compute Mode the data from two (or more) correlation runs are combined to produce a result which is totally independent on the velocity of sound V. The effect of any error in the measurement of the distance D between sensors is also significantly reduced.
  • Page 101 Particular care should be taken when using Compute Mode with T connection pipework. If a leak is indicated near to a T connection, it is quite possible that the leak is actually down the T (as shown in Diagram 11). Diagram 11 Leak If this situation occurs the Red sensor should be moved to a fitting down the T...
  • Page 102 All images, text and designs are protected by international and UK copywrite law and remain the property of HWM-Water. It is against the law to copy or use any of the content from the HWM website or literature without the written consent of HWM-Water.

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