9. Measuring using Measuring-Menus
9.4.1 Damping of Meas. values by a Sliding averag. window
The first possibility of averaging concerns only the measured value of the indi-
cated channel and helps to damp measured values of an unstable or strongly
fluctuating nature, e.g. particular turbulent flows by means of sliding averaging
over a time window. The
Level of damping
can be set via the function
Dam-
ping
over the number of the respective taken values within the range of 0 to
99. The smoothed measured value also applies for all subsequent evaluation
functions. Damping can thus also be used in conjunction with averaging over
single measured values (s. 9.4.3) or at net measurements (s. 9.4.4) .
Meas. value damping over e.g. 15 values with:
Damping: 15
Continuous scanning should be switched off,
because otherwise the conversion rate would be
reduced too much with many measuring points:
Conv.rate: 10M/s Cont: -
9.4.2 Averaging Mode
A detailed description of averaging over measuring point scans is given in the
manual section 6.7.4. The type of averaging is determined through the function
Averaging Mode
. With the averaging mode and the corresponding operation
the following modes can be set:
Function no averaging:
Averaging Mode: -----
Averaging over single measurements with MANU or
all measured values from START to STOP:
CONT
Averaging over all measured values of a cycle:
CYCL
Lightening up for control purposes if averaging is in progress:
»
9.4.3 Averaging over Manual Single Measurements
Single manual meas. point scans E
i
are performed for an averaging of isolated
measurements at certain points or times. At all measuring points where mea-
sured values must be averaged the averaging must be switched on by using
the averaging mode ´
CONT
´, a measurement in progress must be stopped.
32 ALMEMO 2690-8
E1
E2
E3
E4
MANU
MANU
MANU
MANU
CLR
M
=
∑
i
E
i
/
N
M
=
∑
i
m
i
/
N
m1
m15
Time window
