DATA LOGGERS
Leakmaster Acoustic Zone Monitoring
The Leakmaster wireless monitoring system sets a new benchmark for the network servicing business. The noise levels saved by the data loggers are radio-transmitted to the driving mobile unit. Even an untrained operator is able to detect any leakages due to the precise data received. The leakmaster used in Accoustic Zone Monitoring also has the following features:
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Speedy leakage locating process from a mobile unit
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Reduction in personnel costs - only one operator required
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High operating efficiency - battery lifetime of about 10 years
Drulo- Pressure Gauge Meeting All Requirements
The Drulo pressure logger is a memory device for pressure-related data and has been developed and optimised for the water supply service industry. The pressure-related data is measured, displayed and saved. The logger is directly operated through the PC and via an infrared adapter or via a GSM module. The areas of application include pressure monitoring in the water supply field, pipe network calculations, calculating fire water capacities and pressure check measurements. Its features are:
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Solid watertight housing (no plug contracts)
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Foil-protected keyboard for on-the-spot programming
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Extremely high memory capacity for more then 240.000 measurement values
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Failure rate less than 0.1% of final value at 20°C
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Data transfer via infrared / GSM and infrared / USB
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10 year battery lifetime
CORRELATORS
Lokal 100/5
Operation of the LOKAL Leakage Detection System by F.A.S.T is based on the technical principle of the frequency-dependent correlation coherence analysis. The pressurized medium inside the pipe generates a discharge-related noise at the leakage spot. This discharge noise propagates to both ends of the pipe section simultaneously and is acquired through sensitive pick-up units at accessible spots such as valves, hydrants, etc. The amplified signal is then radio-transmitted to the coherence correlator and converted into cross power spectrum compatible data by means of FFT algorithms. Further data processing provides coherence / correlation, which will be displayed on the LOKAL screen. The features include:
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High-performance correlator
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Also convincing on plastic pipes
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Automatic leak detection and spotting routine
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Integrated automatic rejection of disturbing noises
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Frequency analysis (coherence spectrum).
Advantages
- High spotting accuracy for pipes made of steal, cast iron, asbestos and PVC
- Rejection of disturbing noises thanks to the so-called "Comp" feature
- No misdiggings at reflection spots such as T-junctions, the end of a pipe, or angles etc.
- Easy data evaluation of pipe sections consisting of mixed materials and featuring different diameters
- Data reprocessing without any additional measurement procedure possible
FFT Correlator LOKAL 200
Operation of the LOKAL 200 leakage detection system is based on the principle of the frequency-dependent correlation/coherence analysis. The pressurized medium inside the pipe generates a leakage borne noise at the leakage spot. This noise travels in both directions through the pipe and is detected by highly sensitive sensors which are mounted at accessible places such as hydrants, valves, etc. The amplified pick-up signal is radio-transmitted to the coherence/correlator and converted by FFT-algorithms into a cross performance spectrum and a coherence function respectively. After further modification, this spectrum / function is displayed on the LCD The Lokal 200 is not only a first-class correlator. For the first time in leakage detection technology it is also possible to connect a high performance geophone and a testrod to an FFT correlator. Even the frequency generated by the detected noises can be displayed. Features include:
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Integrated operator prompting
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Highly sensitive water-/solid-borne noise pick-ups
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Outstanding positioning accuracy, also on PE and PVC
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Suppression of disturbing noises
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Reflecting spots do not lead to any misdiggings
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Trouble-free performance on network sections with varying pipe materials.
Geo-/Correlator LOKAL 300/2
The multifunctional LOKAL 300 leakage detection system is applied to detect leakages (correlation and geophone) on drinking-water networks and to trace out pipelines. Simple operational handling enables even unskilled operators succesfully to locate leakages.
The pressurized medium inside the pipe generates a leakage-borne noise at the leakage spot. This noise travels in both directions through the pipe and is detected by highly sensitive sensors which are mounted at accessible places such as hydrants, valves etc.
The amplified pick-up signal is radio-transmitted to the central unit, and the coherence and correlation functions are calculated and displayed by the LCD.
Testrod & Geophone
The testrod has been developed by F.A.S.T GmbH and features an extremely high sensitive. It has been designed to detect even minute leakages. As the length of the testrod is adjustable, it is perfectly well suited to listen to water meters and to systematically check pipeline network sections. When leakage-borne noises have been detected with the testrod or when the result of the correlations has to be double-checked, the integrated Geophone can be applied. The filters are automatically or manually set according to the kind of leakage-borne noise. The in-built data memory device allows a comparison of the detected noises and thus supports the pinpointing process to precisely locate the leakage.
