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GLD - Gottsberg Leak Detection

Numbers, data, facts.

Measurement recording and processing with the GLD 202 Leak Detector.

Signal and frequency analysis

  • analog range limits 10-50,000 Hz
  • digital sampling rate 128,000 samples per second
  • data compression of the relevant measurement data to 1 kilobyte/second
  • multi-channel spectral analyses
  • Fast Fourier Transform (FFT) from 50Hz-50kHz
  • transient recognition with classification, window width 2 ms
  • recognition of marker signals in noise
  • integral of the energy from 20-40kHz (results like the MLD 201)
    • average value over 1000ms (100 measurements)
    • peak values in 35kHz and 72Hz channels to identify markers
    • virtual marker recognition

Pressure

  • recording with piezoresistive sensor
  • recording of the pipeline pressure 0 to 80 bar (atmospheres, 0 to 1176 psi)
  • resolution 10 bits, < 0.1 bar (atmospheres, <1.8 psi)
  • measurement accuracy 1%

Temperature

  • temperature of the medium: 0 to 40/50°C (32 to 130-148°F)
  • resolution 10 bits, < 0.1°C (0.2°F)
  • measurement accuracy 1%

Time

  • date and time
  • resolution 1 sec

Distance

  • counting the signal impulses from the optional odometer
  • two separate channels
  • recognition of the direction of travel
  • resolution <1m (3.3ft)

Battery life

  • Monitoring of the charge and discharge, auto-matic switching to sleep mode when batteries are discharged.

Storage of measured values

  • Currently on digital camera-type SD (Secure Digital) card, with a capacity limited only by card size (recording duration more than 200 hours)