ADS® Eureka2R Leak Noise Correlator User Manual October 2010 QR 775019 A1 ADS LLC 4940 Research Drive Huntsville, AL 35805 Telephone (256) 430-3366 / Fax (256) 430-6633 www.adsenv.
ADS Eureka2R Leak Noise Correlator User Manual Copyright © 2010 ADS® LLC. All rights reserved. ADS® is a registered trademark of ADS LLC. Microsoft®, Windows®, and Windows Vista® are registered trademarks of Microsoft Corporation. All other brand and product names are trademarks or registered trademarks of their respective holders. Notice of Proprietary Information The information contained herein represents the latest information available at the time of publication.
ADS Eureka2R Leak Noise Correlator User Manual Table of Contents Chapter 1 Introduction ...................................................................... 1 ADS No-Hassle Warranty and Return Policy ..............................................2 New Product Warranty...........................................................................2 Replacement or Loaner Equipment........................................................2 Shipping ..................................................................
ADS Eureka2R Leak Noise Correlator User Manual Chapter 5 Appendix ......................................................................... 35 Specifications .......................................................................................35 Basic System Components ...................................................................36 Optional Equipment .............................................................................36 Velocity and Filter Look-Up Tables ...................................
ADS Eureka2R Leak Noise Correlator User Manual CHAPTER 1 Introduction Since the initial development of leak noise correlators in the mid 1970s, these instruments have demonstrated unsurpassed performance in effectively locating leaks in pipe networks. Leak location using a correlator provides a degree of precision unavailable through any other method, particularly in environments exhibiting high noise levels. As a result, correlators are now standard tools in leakage control.
ADS Eureka2R Leak Noise Correlator User Manual ADS No-Hassle Warranty and Return Policy The following sections detail the hassle-free warranty and return policy for the ADS Eureka2R Leak Noise Correlator. New Product Warranty ADS will repair or replace any Eureka2R equipment (supplied by ADS) that is defective in materials and/or workmanship for up to two (2) years following the date of shipment from ADS.
ADS Eureka2R Leak Noise Correlator User Manual Product Returns If the customer is not satisfied with the performance of the Eureka2R, the customer may return the equipment within 30 days for a full refund, provided the condition of the equipment is in the same condition as sold, except for expected or normal wear and tear for the period of use.
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ADS Eureka2R Leak Noise Correlator User Manual CHAPTER 2 Principles of Leak Noise Correlation Leak noise correlation is used to detect leaks in pipes with a positive internal pressure, where leaks allow a loss of flow to the outside. The movement of fluid through the leak causes rapid pressure changes around the site of the leak, establishing a noise source at the leak. This noise travels in both directions, at the same velocity, along the pipe from the leak.
ADS Eureka2R Leak Noise Correlator User Manual Methods for Locating Leaks Previous methods of leak location relied on an initial detection of a noise, which was then traced along ground level to identify the location of the maximum noise. The assumption was that this location was directly above the location of the leak. The equipment used for this method included listening sticks and stethoscopes, but these were difficult to use if the noise proved too faint or loud for accurate location.
ADS Eureka2R Leak Noise Correlator User Manual of the leak as a direct distance from the closer sensor. The correlator also may be used to measure the actual velocity of sound in the pipe under investigation, ensuring the greatest accuracy in locating the leak. Note: This discussion assumes the correlator is connected directly to both sensors. Since this is often impractical, the connections typically are made using radio links with negligible delays. However, the principle remains the same.
ADS Eureka2R Leak Noise Correlator User Manual Sensor Positioning Errors Correlator operation relies on the location of the leak existing between the two sensors. However, two contexts can prevent this from occurring. Leak Beyond the Sensors If the leak is located beyond the length of pipe between the sensors, the correlator will ignore the transit time from the leak to the nearest sensor because the transit time will be the same for both sensors.
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ADS Eureka2R Leak Noise Correlator User Manual Trunk Mains and Plastic Pipes It can be extremely difficult to obtain a satisfactory correlation when examining trunk mains or long lengths of plastic pipe. The nature of these pipe networks causes predominately low frequency leak noise because high frequencies attenuate rapidly. The Vector Correlate function of the Eureka2R (described in Vector Correlate on page 27) is a technological development that significantly improves correlation under these conditions.
ADS Eureka2R Leak Noise Correlator User Manual CHAPTER 3 The Eureka2R System The basic Eureka2R system consists of the following components: Eureka2R correlator Two accelerometers Radio transmitter (red) Headphones Operating manual (this publication) This basic system has only one radio link and, therefore, requires connecting the correlator unit directly to one sensor.
ADS Eureka2R Leak Noise Correlator User Manual Optional Equipment In addition to the basic system, other equipment also is available that enhances the versatility of the Eureka2R system. A second radio transmitter (blue) may be used to locate the correlator unit anywhere, regardless of the position of the sensors. ADS recommends using this option when operator safety is a concern.
ADS Eureka2R Leak Noise Correlator User Manual Sensors The sensors detect the leak noise and convert it to an electrical signal. Two types of sensors are available: an accelerometer and a hydrophone. Accelerometers, which mount magnetically to the external surface of the pipe, detect noise transmitted through the wall of the pipe.
ADS Eureka2R Leak Noise Correlator User Manual Installing Hydrophones Connecting a hydrophone to a hydrant requires a hydrant cap suitable for the local hydrant and an adaptor that accommodates the 1-inch male BSP threaded connection on the hydrophone and the female threaded port on the selected hydrant cap.
ADS Eureka2R Leak Noise Correlator User Manual Using a Ground Microphone One of the accelerometer sensors may be used as a simple surface listening device. It normally is used for verifying the location of a leak by detecting a peak in noise at ground surface along the pipeline and in the area determined through the Eureka2R correlation. To use this feature, first connect the cable to the socket on the right side of the correlator and turn it on. Then, connect the headphones, and select Listen Mode.
ADS Eureka2R Leak Noise Correlator User Manual Radio Transmitters Radio transmitters Radio transmitters couple the signals from sensors to the Eureka2R correlator. One transmitter (red) is always used; the other transmitter (blue) may be replaced by a direct cable connection (to the Eureka2R correlator), where appropriate. The transmitter is a sealed unit powered by rechargeable batteries.
ADS Eureka2R Leak Noise Correlator User Manual signal is too strong, loosen the contact between the accelerometer and the pipe. To monitor the leak noise, connect the headphones to the lower port. Select the LOW radio output level by pressing the button (the default setting when turned on is HIGH). An illuminated LED status indicator identifies the selection.
ADS Eureka2R Leak Noise Correlator User Manual A steady green LED means the transmitter is fully recharged. When other indicator LEDs are flashing, a battery fault is occurring. The most likely cause would be an overheated battery. Recharging the transmitter in full sunlight is one way that a battery can become overheated. When this occurs, disconnect the transmitter and allow it to cool. If the fault indication persists after the transmitter is cool, return the unit to ADS for service.
ADS Eureka2R Leak Noise Correlator User Manual CHAPTER 4 Eureka2R Operation Important Note: When turning on a Eureka2R, it takes 3 to 4 seconds for the red ON light to illuminate and an additional 6 to 7 seconds for the display to activate. This occurs because the Eureka2R performs a boot sequence similar to a computer.
ADS Eureka2R Leak Noise Correlator User Manual Connections Based on the application, a Eureka2R may be operated in one of the following ways: Using two radio transmitters Using one radio transmitter and a direct connection to an accelerometer or hydrophone Using a direct connection to a single accelerometer sensor Make all direct connections to the same port, located next to the printer port on the right side of the instrument.
ADS Eureka2R Leak Noise Correlator User Manual Vehicle-mounted antennas may be used to increase the range of the system. To connect this kind of an antenna, remove the fitted antenna located above the connecting elbow (i.e., unscrew the black sleeve). Turning On the Unit Turn on the unit by momentarily pressing the button at the top right-hand side of the keyboard. Press the button again to turn off the unit.
ADS Eureka2R Leak Noise Correlator User Manual Main Menu The main menu provides three functions and displays the status of the battery. Since ambient lighting is unpredictable, the main menu allows immediate adjustment of the screen contrast. Turn on the backlight when necessary. Note: Using the backlight reduces the operational time per battery charge in half. The Exit key is at the button of all function screens. Pressing this key displays the main menu. The Back key is at bottom of all sub-functions.
ADS Eureka2R Leak Noise Correlator User Manual Configure The Configure screen allows you to set the correlator default conditions. Configure screen Change Language allows you to change the text to the selected language. Change Date enables you to set the correct date. Set the month and year using the Next Month, Previous Month, Next Year, and Previous Year buttons; set the date using the left and right arrow keys. Confirm the selection using the Enter key (↵).
ADS Eureka2R Leak Noise Correlator User Manual Correlate Correlate screen The correlation (Correlate) screen main window displays the following, from top to bottom: Total length under investigation Leak noise correlation along the length Pipe sections in proportion, with (where possible) the material and length of each section Cursor Radio transmitter(s), with signal strength indication Cursor position from each sensor Status window showing the operating conditions Mode of
ADS Eureka2R Leak Noise Correlator User Manual Pipe Details The Pipe Details button allows you to select the pipe material, diameter, and length; you may select up to six different pipes for a survey length. Enter the length of the selected section using the alphanumeric keys, and then press the Enter button. Select the pipe material from a list. Change the selection from material to material or scroll through the combinations of material and diameter.
ADS Eureka2R Leak Noise Correlator User Manual Survey This mode provides a quick overview of the leak noise and automatically restores the pipe details to the default conditions. This is ideal for applications where a leak is suspected because it allows for the identification of any peaks in the noise spectrum while, for example, the sensors are reading successive lengths of pipe.
ADS Eureka2R Leak Noise Correlator User Manual Manual Velocity allows you to enter a value for velocity. This value replaces the velocity obtained from tables. After entering this value through Mode > Measure Velocity, it displays on the main Correlate screen. Once a value has been entered, the button changes to Auto Velocity. Pressing this button uses the default value from the tables. WARNING: Velocity can vary with MDPE (medium density polyethylene) pipes.
ADS Eureka2R Leak Noise Correlator User Manual To set contrast, volume, or balance, first select the function and then use the left and right arrow keys to adjust the level. The backlight key serves as a toggle switch, alternately turning on and off the backlight. Select Adjust Filters to improve the correlation when, for example, no correlation exists or the peak is too broad. Two filters are available for separately suppressing low and high frequencies.
ADS Eureka2R Leak Noise Correlator User Manual Noise Suppress This button allows you to mark one or more sections of the correlation so that these areas will not be used for the correlation calculations. Suppress Start marks the position of the cursor. Moving the cursor, using the left and right arrow keys, causes a suppression zone to appear symmetrically about the Suppress Start point (the cursor moves with the edge of the zone).
ADS Eureka2R Leak Noise Correlator User Manual Listen mode operation Fast Track This option is designed for an operator with a recurring work schedule or applications where pipe materials remain unchanged throughout many correlations. Access Fast Track through the Configure function on the start-up screen. Selecting Fast Track will expedite the menu process, requiring less key strokes.
ADS Eureka2R Leak Noise Correlator User Manual Fast Track correlation screen If the pipe material remains constant, you only need to change the various pipe lengths between each correlation run. Fast Track does not include a function for saving files to memory. This can occur only by setting the correlation to the advanced mode before commencing correlation. Recharging the Eureka Connecting the correlator to the charger illuminates the ON button. If the charger is not ready (i.e.
ADS Eureka2R Leak Noise Correlator User Manual Battery Charger ADS provides two options for battery chargers: an external unit and a unit built into the carrying case. Both chargers operate in a similar manner. The external unit has one red power LED and several green LEDs. A green LED is located above each charging cable connection and illuminates when the corresponding cable is delivering a fast charge to an instrument.
ADS Eureka2R Leak Noise Correlator User Manual Warning: The charger may get hot when air temperatures rise above 86 degrees F (30 degrees C). Under these temperature conditions, keep the lid to the equipment case open during charging activities to allow adequate air circulation. Safety Information The charger should be used only with the supplied cables. It also has been designed for use only with the equipment supplied; therefore, do not use it to charge any other type of equipment.
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ADS Eureka2R Leak Noise Correlator User Manual CHAPTER 5 Appendix This appendix contains the following information pertaining to the ADS Eureka2R Leak Noise Correlator: Technical Specifications System Components Optional Equipment Velocity and Filter Lookup Tables Appendix A – System Components and Specifications Specifications Measurement Method Equivalent Time Delay Cross-correlation +/– 12 seconds Maximum Distance Iron Pipe: 9.
ADS Eureka2R Leak Noise Correlator User Manual Correlator Battery Operating Time: 7 hours (typical, no backlight) Recharge Time: 1 hour (typical) Charger Input: 90 to 260 volts (ac) / 10 to 18 volts (dc) Physical Dimensions Weight Correlator only: 11.8 x 4.7 x 2.2 inches (300 x 120 x 55 mm) System in Carrying Case: 5.9 x 6.5 x 5.5 inches (405 x 165 x 140 mm) Correlator only: 3.64 pounds (1.65 kg) System: 16.98 pounds (7.
ADS Eureka2R Leak Noise Correlator User Manual Velocity and Filter Look-Up Tables The Eureka2R uses the values in the table below as default values based on the pipe material, pipe diameter, and type of sensor used. These defaults may be adjusted as described in this manual. The abbreviations representing the individual materials are used by Eureka. When using an Accelerometer Hydrophone sensor combination, select the default filter settings for Hydrophone - Hydrophone.
ADS Eureka2R Leak Noise Correlator User Manual CO Copper DI Ductile Iron DCL Diameter in Inches (mm) Velocity in Feet Per Second (m/s) Filters (Hz) Filters (Hz) Mic/Mic Hydro/Hydro <0.59 (<15) 4232 (1290) 100 to 2000 25 to 1000 0.59 to 0.98 (15 to 25) 4003 (1220) 1.02 to 1.97 (26 to 50) 3871 (1180) >1.97 (>50) 3609 (1100) Diameter in Inches (mm) Velocity in Feet Per Second (m/s) Filters (Hz) Filters (Hz) Mic/Mic Hydro/Hydro <3.94 (<100) 4331 (1320) 100 to 2000 25 to 1000 3.
ADS Eureka2R Leak Noise Correlator User Manual HDPE Diameter in Inches (mm) Velocity in Feet Per Second (m/s) Filters (Hz) Filters (Hz) Mic/Mic Hydro/Hydro High-Density >0.98 (<25) 1296 (395) 25 to 500 3 to 250 Polyethylene 0.98 to 1.97 (25 to 50) 1247 (380) 2.36 to 5.91 (60 to 150) 1214 (370) >5.91 (>150) 1148 (350) LE Diameter in Inches (mm) Velocity in Feet Per Second (m/s) Filters (Hz) Filters (Hz) Mic/Mic Hydro/Hydro Lead <0.98 (<25) 4003 (1220) 100 to 1000 25 to 500 >0.
ADS Eureka2R Leak Noise Correlator User Manual 40 ST Diameter in Inches (mm) Velocity (m/S) Steel <0.98 (<25) 4560 (1390) 0.98 to 3.94 (25 to 100) 4364 (1330) 4.33 to 7.87 (110 to 200) 3937 (1200) 8.27 to 11.81 (210 to 300) 3773 (1150) 12.20 to 19.69 (310 to 500) 3478 (1060) 20.08 to 29.53 (510 to 750) 3346 (1020) 29.92 to 35.43 (760 to 900) 3215 (980) >35.
