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Leak Detection System Due to the increasing pressure on waste management companies concerning the handling and containment of waste material, geomembrane technology is used where leakage of fluids may be a possibility and where such leakage can pollute the water table. Since geomembrane materials are generally supplied on rolls, a welding process is required to generate a large geomembrane matt. A thin layer of sand/clay is then used to cover the lining prior to filling and the machinery employed to do this can frequently cause tears or rips in the liner. The UAV Leak detection system is designed to provide landfill operators or geomembrane installers with an accurate detection method for cuts or holes as small as 3mm. Such damage may be as a result of poor installation techniques, incorrect dumping procedures or weld failure during installation of the membrane. Regardless of cause this technology simply and accurately locates holes by measuring current flow from outside the liner to the inside landfill area, allowing repair procedures to be performed. Such techniques ensure the liner is integral prior to full scale waste management. This electrical leak locating equipment is used on the soil covering on a newly laid geomembrane in a landfill site. Damage can be caused to the geomembrane by the heavy earth moving machinery during construction. This is a cost effective method of leak location minimizing the amount of material which must be removed to effect a repair. A portable frame with data logger connected to two non-polarizing electrodes allows for the results to be recorded for operations which require a full report. The equipment is supplied complete with download software allowing data to be plotted on software such as Surfer (not supplied) or Windows Excel.
The method of surveying is to apply a high voltage between the inner soil and the ground outside the liner. The liner is an insulator, but if there are cuts to the liner, current will flow through these holes creating areas of voltage gradient nearby as current is concentrated into a small area. A portable survey frame with a data logger connected to two nonpolarizing electrodes is used to record voltages which can be downloaded to a portable computer with the supplied Windows software. Results may then be plotted using Windows Excel or Surfer. The use of non-polarizing electrodes overcomes the anomalous effects of self potential which would make surveying difficult. This technique is capable of finding holes as small as 3mm in geomembrane with about 0.5m of soil covering. The high voltage power unit supplies up to 700 Volts which can inject current into all but the driest soil.	PDF Brochure
CONTENTS... The complete system comprises: 1 High Voltage Power Unit. 1 Test Load Resistor. 2 Stainless Steel Electrodes. 2 Short Jumper Leads. 1 500m Cable on Hand reel. 1 High Voltage Warning Sign. 1 AC Lead for Domestic Supply. 1 Industrial AC Lead for Generator. 1 Manual. 1 Transit Case. 1 Data Logger. 1 Test Voltage Source. 1 International Charger. 1 RS232 Cable. 1 USB to RS232 Adaptor. 1 EL-WIN Software Package. 1 Manual. 1 Transit Case. 1 Survey Frame with 2 Non-Polarizing Electrodes. 2 Spare Electrodes.
	SPECIFICATIONS... High Voltage Power Unit Supply in: 110 or 230 Volts as ordered. 500VA from a small generator is adequate. Output: Variable from near zero to about 700 Volts offload depending on input supply. Current maximum of 1 Amp. Power maximum of 100 VA. (e.g. 1 A at 100 V or ¼ A at 400 V ) Metering: Both current and voltage are monitored on front panel digital L.C.D. meters. These function irrespective of whether the high voltage is on or off. Connection: Quick connection using covered terminal block. A 500m reel of cable is supplied to make connection to remote electrode. Safety: Automatic shutdown if the terminal block is opened. Large red “panic” switch to shutdown rapidly. Two start switches to avoid inadvertent switch-on. Test: A Test Load Resistor is supplied so that the operator can confirm functionality of the unit prior to deployment. Weight: 13kg.
Data Logger Supply: Internal rechargeable battery. Capacity: 2000 Readings can be logged before downloading. Display: Logging and real-time voltmeters with record counter. Controls: Locking On / Off switch Red record switch paralleled with B.N.C. connector for use with external record switch fitted to survey frame. 2 Volt and 20 Volt range switch RS232: Serial control from a computer using supplied software allows starting, stopping and downloading of data. Survey Frame Weight: Less than 3kg with logger fitted. Electrodes: Two non-polarizing type with ceramic tips and sealed CuSo4 solution. Easily replaceable.
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