11. Measuring with the measuring menus
11.4 Averaging
The
average value
for a measured value is needed for various applications
e.g. smoothing a widely fluctuating measured value (wind, pressure etc.).
Average flow velocity in a ventilation channel
Hourly or daily average values of weather data (temperature, wind etc.)
Also for consumption values (current, water, gas, etc.)
The average value
M
for a measured variable is obtained by totalizing a whole
series of measured values (Mi) and dividing by the number of measured values
(N).
Average value
M
=
∑
i
M
i
/
N
The ALMEMO 5690-2M offers several differ-
ent averaging modes.
These include measured value smoothing for
the selected channel with a sliding averaging
window, averaging over individual measuring
operations selected by place or time (also net-
worked measuring as per VDE), averaging
over the full measuring time, over cycles, or
over specified measuring points.
For all these modes you can call up a special
wizard menu
Averaging
to help you enter the
necessary parameters with help windows that
will teach you how best to proceed.
Measuring menu
Average value
:
Most averaging functions can also be per-
formed directly in a measuring menu, e.g.
´User menu´
U2 Average value
. Help win-
dows explaining the various averaging modes
are available in the programming stage, e.g.
To calculate volume flow from the average ve-
locity and the cross-section of a flow conduit
you can use either the ´User measuring menu´
U3 Volume flow
(
see 11.4.9
) or
the
Volume flow
wizard.
40 ALMEMO
®
5690-2M
* ALMEMO 5690-2 *
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
AVERAGING:
damping by a sliding window ©
over single manual scans
Net measurement n points
over the measuring time
over the cycle
over measuring points
F ESC
Averaging : CONT
over the whole measuring opera-
tion by pressing START / STOP
over individual manual measuring
operations by pressing MANU
C © REC COM l© ©l R01 * ´´´´´´µµµµ¶
±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±
01:
254,5 °C
NiCr temperature
Damping:
20
Maximum value:
255.0 °C
Minimum value:
224.1 °C
Average value:
245.7 °C
Averaging mode: CONT
Cycle-timer:
00:00:30 Sn
Conv.rate: 10M/s
Cont: -
Measuring time:
00:01:23.45
START MANU M PRINT ESC