6.4 Averaging
The
average value
of the measured value is required for various applications:
e.g.
Smoothing of a largely varying measured value (wind, pressure etc.).
The average flow velocity in a ventilating channel.
Hourly or daily average values of weather data (temp., wind etc.).
As above, of consumption values (current, water, gas etc.).
The average value of a measured value results when a number of
M
measured values M
i
are added together and then divided by the number N of
the measured values:
Average value M =
i
(
Σ
M
i
)
/N
All averaging functions can be found in the
´User Menu´ U2 (see 5.1) ´Average Value´:
For the calculation of the volume flow from
the average velocity and the cross section of
a flow conduit the menu ´Flow´ can be used
and easily loaded with the software
AMR-Control (V3.00 and higher) or can be
manually generated (see 6.6).
6.4.1 Attenuation of Meas. Values through Moving Averaging
The first possibility of averaging exclusively affects the measured value of the
displayed channel and serves, in case of unstable measured values, e.g. when
measuring turbulent flows, to attenuate or smooth the meas. values by a
moving averaging. Using the function ´Attenuation´ the
level of attenuation
can be adjusted over the averaged values within the range from 0 to 99 (see
5.5). The smoothed measured value is also valid for all following evaluation
functions. Therefore, the attenuation can also be used in a combination with
the averaging over individual measured values (see 6.4.3), e.g. for net
measurements.
Avg. Val. Window
m1
m20
M=( m )/N
Σ
i
i
Smoothing of meas.values using the function ´Attenuation´:
Attenuation: 20
The continuous measuring point scan should be
switched off as, otherwise, for many measuring
points the conversion rate will largely drop:
ConvRate: 10/s -
ALMEMO
®
2590-9
29
Displaying a Measuring Point
C
!
REC COM
|> >|
R01
"
01
:
▲
254
.
5
°C
NiCr Temperature M
¯
Attenuation: 00
Max Value: 245.7°C
Min Value: 224.1°C
Avg Value: 231.5°C
Count: 09876
Averag.Mode: CONT M
¯
PrintTimer:00:01:23 S
ConvRate: 10 Cont: -
MeasTime: 00:01:23:45
M
▲
PRINT START MANU
