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9 Options for
Options for optimising measurement results
9.3
Automatic filtering
The
AC 06
can perform automatic filtering (processing control)
after a
measurement (see section 8.4.1). This involves optimizing
the
coherence function filters using statistical methods to achieve
an optimal correlation result.
A
frequency analysis can be performed on ongoing measurements
and saved measurements.
9.4
Checking the microphone connection
Ensure that the microphone contact to the fittings is as secure
and undamped as possible; remove any dirt and rust.
9.5
Using accessories
Use Sewerin accessories and tools. Use a hydrophone for plastic
piping
. The active filter creates new possibilities. The “
teach-your-
self tape” allows you to check the
system and with a minimum of
effort you can practice and keep yourself “in training”.
9.6
Changing location
Change the location of the microphones. Even fittings further away
can achieve a better result if they transmit the sound better.
9.7
Saving time
If it transpires during a measurement that no peak can be mea-
sured, any painstaking calculation of the exact pipe data prior
to the measurement may have been a waste of time. Practical
experience has shown that it is therefore advisable to start the
measurement initially with estimated pipe data. If the length of
the pipe is greater and/or the sound velocity less than assumed,
a potential peak will appear in any case within the CCF and will
therefore never be “overlooked”.
If you use this practical approach, you must of course calculate
the exact pipe data at the end.
