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“Wei: A&C” is the frequency weighting in the current measurement interface which
shows the indexes of A and C weighting. When the cursor is on “Wei”, the user can
choose two weightings of A, C and Z by pressing or keys, and the measurement
content will change in response.
In the middle are 26 measurement indexes of the current frequency weighting, there
are 13 measurement indexes at every frequency weighting.
The big characters in the black background are measurement content, and there are
three measurement indexes: LAFp, LCFp and LZFp. Pressing or key when the
cursor is at the three indexes. The measurement result is refreshed every 0.5 second
and changing with the environmental noise.
The graph displayed on the lower display screen is the progress graph that instanta-
neous value used in statistic analysis changing with time. Each graph is displayed 20 s,
the displayed index is corresponding with the index names in the lower blue back-
ground. When the cursor is moved to index name “LAFp”, the progress graph can be
changed to the displayed content of other index names.
6.2.3.3 Big interface
