Important and common terms
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Important and common terms
The Commander-3 can be operated in two different user modes (see page 23):
•
Easy mode
•
Professional mode
You can switch between these modes in system settings menu (see page 25).
These two values are identified each time a noise logger performs a measurement:
•
“Level”
… is the noise level (volume) of a measurement
•
“Frequency” … is the frequency in the measurement’s frequency spectrum with
the greatest deflection
ESA stands for “Extended Spectral Analysis” and means that noise level and frequency
are combined in one reading using a mathematical formula. This results in an extended
view of the measured data, which makes the leak probability and position visible in
relation to other loggers. The dimensionless ESA value can be between 0 and 100. The
higher the ESA value, the higher the leak probability and the shorter the distance from
the logger to the leak.
In order to analyse the recorded measurements, the noise loggers must be read after
measuring, i.e. the data in the loggers is accessed wirelessly with a reading device
(Commander/Reader/PC). It is possible to do this in the following ways:
Group mode
“Lift&Shift”
“Patrol”
“Network”
The loggers are collected;
data is read out wirelessly
in the office
The loggers remain at
the place of use;
data is read out
wirelessly while
“driving by”
All the installed loggers
are networked with each
other and connected to
a GSM box;
data is read out via
mobile radio from the
office
The method must be chosen for reading out the measured data before the measuring
work is performed. Before measuring, the mode decided on is permanently assigned to
the loggers or logger groups. After that, only loggers that have been configured for
reading using “Patrol” can be read with “Patrol”, for example, and not with “Lift&Shift” or
“Network”. The same applies to the other group modes.
User mode
Level and frequency
ESA value
Group mode
