Eureka3 User Manual
Eureka3 Page 8
2.2.1 Leak Beyond Sensors
If the leak is located outside the length of pipe between the sensors, then the correlator will ignore the
transit time from the leak to the nearest sensor, as this transit time will be the same for both sensors.
This will give the result that the leak will appear to be located directly at the sensor nearest to the leak.
(This is sometimes termed “out-of-bracket”.) This is an indication that one sensor must be moved to
locate the leak position accurately.
2.2.2 Leak on Connecting Pipe
If there is a leak on a pipe that connects to the pipe being sensed, then the noise will appear to spread
from the point of connection of the pipes, and so will appear as a leak at that point. It is then
necessary to move one sensor to the connecting pipe (in other words, to place the leak between the
sensors) in order to locate the leak accurately. A thorough knowledge of the layout of the entire pipe
network is required to ensure that the correlator is making measurements on the correct section of
pipe and that there is no possibility of leaks on branch pipes causing false readings.
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