Table of Contents
Advertisement
11.4.1 S moothing out meas. val. by means of a sliding averag e
The first method for averaging applies exclusively to the measured value of the
displayed channel; it is used to smooth measured values of an unstable or
strongly fluctuating nature, e.g. especially turbulent flows, by means of a sliding
average over a specified time frame. The level of smoothing can be set in the
Smoothing
function; here you specify the number of measured values to be av-
eraged (possible range 0 to 99). The smoothed measured value then applies for
all subsequent evaluation functions. Smoothing can thus also be used in a com-
bination with averaging over individual measured values (see 11.4.3) or for net-
worked measuring (see 11.4.4).
m1
Measured value smoothing over e.g. 15 values :
When a large number of measuring points is involved, continuous measuring
point scanning should be switched off; the measuring rate might otherwise be
substantially reduced.
Time constant (s) = smoothing / measuring rate · (measuring points +1)
is calculated and displayed by the averaging wizard.
11.4.2 Averaging mode
For a detailed description of averaging over measuring point scans see the
Manual 6.7.4.. The averaging method is defined for each channel in the
function. Below are the methods available, shown with averaging
aging mode
mode and operation :
Function - No averaging :
Averaging over individual measuring operations MANU or over all measured val-
ues from START to STOP:
Averaging over all measured values in a cycle:
Lights up so long as averaging is in progress : »
Display of average value in function
For recording average values you will need a function channel
with range M(t) (see 12.3.9/10) or the corresponding output func-
tion M(t) instead of the measured value (see 12.4.5).
11.4.3 Averaging over individual manual measuring
To obtain the average of individual measuring operations at particular locations
or times individual manual measuring point scans E
measuring points where measured values are to be averaged averaging must
be switched on with ´CONT´ mode.
time window
Meas. rate: 10 meas. op. / second Cont: -
Averaging mode :
m15
Smoothing:
Averaging mode:
CONT
CYCL
Average value: 12.34 m¡
must be performed. At all
i
ALMEMO
Averaging
∑
M=
m
/N
i
i
15
Aver-
-----
®
5690-2M
41
Advertisement
Table of Contents
