User's Manual

Online measurement – Realtime correlation with 2 sensors
56
Assess whether the leak position seems plausible or not.
Question 1: Is one of the values zero or close to zero?
No Yes
Meaning:
The values seem plausible.
How to proceed:
Continue the
measurement and start a detailed
analysis.
Meaning:
The leak is located precisely at
the measuring point or outside the
correlated pipe section.
How to proceed:
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.
Question 2: Does each value show the half of the measuring length
No Yes
Meaning:
The values seem plausible.
How to proceed:
Continue the
measurement and start a detailed
analysis.
Meaning:
The leak is located precisely half
way between the measuring points or a
measuring error has occurred (so called
‘center point correlation’).
How to proceed:
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:
x When you tap the displayed correlation curve, the Correlation analysis menu
with the relevant tools opens.
x 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 System settings menu.
Rate the leak position
Detailled analysis