User's Manual

Online correlation
64
Use the following questions to assess whether the leak position seems plausible or not.
Is one of the values zero or close to zero?
If the answer is NO, the values seem plausible.
Continue the measurement and start a detailed analysis.
If the answer is YES, the leak is located precisely at the measuring point or outside the
correlated pipe section.
Cancel the measurement. Take the relevant transmitter and look for a new installation
point in order to enlarge the measuring length. Then start a new correlation.
Does each value show the half of the measuring length
If the answer is NO, the values seem plausible.
Continue the measurement and start a detailed analysis.
If the answer is YES, the leak is located precisely half way between the measuring
points or a measuring error has occurred (so called ‘center point correlation’).
Cancel the measurement. Take one of the transmitters and look for a new installation
point in order to enlarge the measuring length. Then start a new correlation.
Use the various tools to analyze the displayed correlation:
• When you tap the displayed correlation curve, the Correlation analysis menu with
the relevant tools opens.
• When you tap the displayed coherence curve, the Frequency analysis menu with
the relevant tools opens.
Use the Back button to return to the Correlation menu.
Some settings for calculating and presenting the correlation curve can be changed in
the in the System settings menu (see page 51).
Rate the leak position
Detailed analysis