LSI LASTEM E-Log – User’s manual
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5.3.
Measure elaboration
For each acquired or calculated measure it is possible to obtain statistical elaborations at a time base
from 1 second to 24 hours. The selected elaboration base is common to all quantities.
Just as with the acquisition process (see §5.2), the elaboration process, too, evaluates the time of the
built-in clock as a multiple of the elaboration rate in order to determine the moment in which the
elaboration of the statistical data begins. For example, if the elaboration rate were to be set to 1 hour
and 30 minutes, and the current time were 15:24:01, the following elaborations would take place at
16:30:00, 18:00:00, 19:30:00, etc.; the elaboration uses all instant data acquired or calculated in the
chosen elaboration span.
The available statistical elaborations are:
Arithmetical calculations
o
Instantaneous value
o
Mean
o
Minimum
o
Maximum
o
Standard deviation
o
Total
o
% valid data
Vectorial calculations specific for anemometric quantities
o
Prevailing direction
o
Resulting direction
o
Resulting speed
o
Direction standard deviation (sigma-teta)
o
Calm wind percentage
It is not possible to combine arithmetical and vectorial calculations for each specific measure.
Programm
3DOM
can be used to program the elaboration parameters.
The instrument doens’t have infinite process capacity: it depends on the number of acquired and
calculated measures, on programmed actuation algorithms, on processings configured for each
measure, and on continuous communications between the instruments and the outside devices; all
these parameters cannot be programmed at the same time up to their available maximum, because
the instrument could have wrong operation. The instrument has right operation in the following
heavy duty condition:
All analogue and digital inputs configured with measures of resistance, tension, state and
frequency (1 kHz); every input sampled with 10 seconds rate;
Six measures configured like measures calculated with several algorithms;
The remaining measures (up to 99 measures) sampled by LSI CISS sensors with
transmission every 10 seconds;
Each measure is elaborated every 30 seconds with minimum, medium and maximum value
statistics and standard deviation;
All 20 active actuation logics configured with different algorithms and by the use of
acquired and calculated measures;
Serial communication constantly activated on both communication ports at maximum bit
rate.
Summary of Contents for E-Log
Page 1: ...Cod INSTUM_00351_en E Log User s manual Updated on 09 18 2017...
Page 15: ...LSI LASTEM E Log User s manual 15...
Page 60: ...LSI LASTEM E Log User s manual 60 6 6 Mask of terminal board...
Page 61: ...LSI LASTEM E Log User s manual 61 6 7 Connection cables...
Page 62: ...LSI LASTEM E Log User s manual 62 6 8 Declaration of Conformity...