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SubSurface Instruments LD-20 Operator's Manual

Water leak detector
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LD-20
Water Leak Detector
Operators Manual
LD-20 Leak Detector

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Summary of Contents for SubSurface Instruments LD-20

  • Page 1 LD-20 Water Leak Detector Operators Manual LD-20 Leak Detector...
  • Page 2 LD-20 Leak Detector...
  • Page 3 Thank you for choosing SubSurface Instruments, Inc. Professional Water Leak Detector LD-20. This manual provides instructions on how to use the LD-20 Water Leak Detector. Please read these instructions before using the equipment to ensure proper usage. If you have any questions about operating or handling the equipment, please contact our official distributors in your country.
  • Page 4 LD-20 Leak Detector...
  • Page 5 16 - 17 Frequency Filters 18 - 19 Menu Functions Main Panel Functions Filters Settings 21 - 22 Back-light Settings Limit Settings Reverse Settings Preset Settings Technical Specifications 26 - 27 Disclaimer Warranty Repair & Service Copyright LD-20 Leak Detector...
  • Page 6 LD-20 Leak Detector...
  • Page 7 The pick-up has been designed with precision to capture even very slight vibrations. For this reason, handle the Microphone with care to prevent it from impact. Caution Never swing the Microphone. Caution The main unit (amplifier) cannot be used in water. LD-20 Leak Detector...
  • Page 8 This equipment is specifically designed for detecting and pinpointing water leaks in underground water pipes. Utilizing advanced acoustic technology, it listens for the subtle sounds of water escaping from pipes, allowing for precise identification of leak locations. Leak Sound Ground Surface LD-20 Leak Detector...
  • Page 9 Equipment Overview The Water Leak Detector LD-20 listens for leak noise on the road surface to identify water leak points without needing to dig up the road. With 55 available filters, it can detect water leak sounds across a wide range of frequencies more effectively than traditional water leak detectors.
  • Page 10 Microphone & Hand switch David Clark Headphones 3 Section Rod Shoulder Strap Soft Case & Waist belt *Adjustment range: 75 to 135 cm Magnet Base Connecting cable for mobile Android phone 10 mm Nut Driver Storage/Carrying Case LD-20 Leak Detector...
  • Page 11 During setting, this the volume in the top menu and make selections in setting menus. screen displays the various settings. Amplifier Plug Side Smartphone Plug Microphone/ Sensor w/hand-switch connector Amplifier Power Side Headphones Smartphone Authentication Position Power Button LD-20 Leak Detector...
  • Page 12 Microphone cable. 2. Adjust the Microphone cable to an easy-to-use length. 3. Insert the Microphone/sensor, headphone, and smartphone plugs into the jacks on the side of the amplifier. David Clark Plug Headphone Plug 1/4 Inch jack Audio Adapter LD-20 Leak Detector...
  • Page 13 If the equipment will not be used for an extended period (typically one month, depending on ambient conditions), remember to remove the batteries. It is the operator’s responsibility to determine the appropriate duration for battery removal to prevent equipment damage. LD-20 Leak Detector...
  • Page 14 When placing the Microphone on the road, make sure it is stationary before pressing the hand switch trigger. Pressing the hand switch trigger while the Microphone is in motion generates a lot of noise and may also damage your ears. LD-20 Leak Detector...
  • Page 15 Maximum Point Frequency Curve Leak Sound Leak Point Leak Point The maximum level point may not always be directly above the water leak point, depending on ground and road conditions. LD-20 Leak Detector...
  • Page 16 In other words, the sound quality varies because the four elements of the complex sound mix with different conditions. The frequency distribution of the water leak sound does not remain constant in every scenario. LD-20 Leak Detector...
  • Page 17 11. Wind noise 12. Sound from transformers and automatic vending machines 13. Sound from electricity, telephone cables, motors, and pumps 14. Pool type water leaks Note: Detection of water leaks is sometimes difficult depending on the above conditions. LD-20 Leak Detector...
  • Page 18 Furthermore, it offers the capability to operate without a filter through the designated Thru function. Please be advised that the cutoff frequency of the high-pass filter (HPF) should be lower than that of the low-pass filter (LPF). LD-20 Leak Detector...
  • Page 19 Examples of filter selection according pipe type. FREQUENCY HIGH PASS FILTERS LOW PASS FILTERS PIPE 1200 TYPE Cast Iron Pipes Ductile Iron Pipes Steel Pipes Plastic Pipes PVC, PE, etc. Higher Pressure Smaller leaks mplified tArget ound LD-20 Leak Detector...
  • Page 20 Main Panel Functions These are the seven available functions in the LD-20: To adjust the High Pass Filter To adjust the Low Pass Filter Thru No filters applied B. Light Turn on/off the LCD brightness Limit Limits impact sounds Reverse Change the orientation of the LCD...
  • Page 21 You can choose from the following HPF values: 1200, 800, 600, 400, 300, 200, 150, and 100. Just keep in mind that the HPF value must be lower than the Low Pass Filter (LPF) value. PRESET PRESET 1200 LD-20 Leak Detector...
  • Page 22 THRU THRU B. LIGTH B. LIGTH When the “filter through” setting is set to ON, both the low and high pass filters are disabled. To activate the filter settings, set THRU to OFF. LD-20 Leak Detector...
  • Page 23 2. Use the buttons to select a setting between 0 and 3, The higher the number, the more impact sound will be suppressed. 3. Then confirm the setting by pressing the button again. B.LIGHT B.LIGHT LIMIT LIMIT REVERSE REVERSE LD-20 Leak Detector...
  • Page 24 1. Access the “REVERSE” option in the main menu to initiate the inversion of the LCD. 2. When you press the the LCD will invert every time you press the buttons. 3. Confirm the setting by pressing the designated button. LIMIT REVERSE PRESET LIMIT REVERSE PRESET LD-20 Leak Detector...
  • Page 25 3. Then confirm the setting by pressing the button again. REVERSE REVERSE PRESET PRESET The following parameters are available for preservation using the PRESET feature: • Sound level, • Reverse display, • Filter settings, and • Limiter setting. LD-20 Leak Detector...
  • Page 26 Continuous operating time 40 hours or longer (When back-light is OFF and no signal is present) Operating temperature range −20°C to+55°C External dimensions 160mm(W)×40mm(D)×105mm(H) (Excluding protective case and protrusions) Weight 600g (excluding batteries) Dust-proof/drip-proof IP54 or equivalent LD-20 Leak Detector...
  • Page 27 100 to 7,000Hz Impedance 60Ω, +/- 10% @ 1kHz Sensitivity 125dB, SPL +/- 3 @ 1kHz, re: 1mW RMS Distortion ≤ 2% @ 1mW, 300 to 3,500Hz Maximum Power 100mW Rub and Buzz 100mW @ 300 to 3,500Hz LD-20 Leak Detector...
  • Page 28 SubSurface Instruments, Inc. This manual contains basic advice for the operation of the LD-20. It is essential that the manual is available for the trained operator to use as a reference. You must read this manual carefully.
  • Page 29 No other warranty is expressed or implied. The warranty described in this paragraph shall be in lieu of any other warranty, including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. SubSurface Instruments, Inc. will not be liable for consequential damages. LD-20 Leak Detector...
  • Page 30 Repair & Service The SubSurface Instruments, Inc. LD-20 is designed for dependable operation without the need for periodic adjustment or calibration. However, if your Detection Unit is not working properly, you can return it to us for repair. While a Return Material Authorization (RMA) is not required, there is some necessary information needed to ensure that your unit is properly repaired and returned.
  • Page 31 Copyright Copyright Copyright © 2025 SubSurface Instruments, Inc. All rights reserved. No part of this manual may be reproduced, copied, modified or adapted, without the prior written consent of the SubSurface Instruments, Inc. Please contact SubSurface Instruments, Inc. to request permission for reproduction and use of this manual for training purposes.
  • Page 32 SubSurface Instruments, Inc. 1230 Flight Way Drive De Pere, WI 54115 USA +1 (920) 347.1788 | info@ssilocators.com www.ssilocators.com...