Information About The Device - Trotec PD200 Operating Manual

Information about the device

Device description
The device is designed for the following applications:
• Location of earthed leaks in non-conducting sealing
systems
• Non-destructive inspection of foil and bitumen roofs
• Leak detection in case of flat roofs with superimposed load
(e.g. gravel fill, greening, paving etc.)
• Tightness test of hall floor sealing for LAU (storage, filling
and handling of substances hazardous to water) and HBV
(production, treatment and use of substances hazardous to
water) systems (WHG – Water Resources Act)
The method is based on the fact that there is water both on top
of and also underneath the sealing sheet. This water or moisture
serves as conductor. Therefore, leak detection always requires
a damp and hence electrically conductive sealing sheet,
regardless of whether the surface is wet to various degrees,
gravelled or greened.
The pulse generator emits current pulses with a voltage of 40 V.
The current finds its path to the point of leakage via the
moisture. The pulse receiver is used to measure the voltage
potential difference. The needle of the indicating instrument
deflects to the direction with the higher potential, indicating the
direction for leak detection. This way you are led to the leak, i.e.
to the position where moisture enters.
A
+ -
G
C
A Pulse generator
C Leak
4
D
B
B Loop wiring
D Potential lines
pulse current measuring system PD200
Device depiction
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EN