Averaging; Smoothing Meas Values By Means Of A Sliding Average - Ahlborn ALMEMO 2590-2A Operating Instructions Manual

Interface commands:
store a measurement value:
output of data storage:
Clearing the memory:

12.2 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 for weather data (temperature, wind, etc.)
Also for consumption values (electric current, water, gas, etc.)
M ̅ = ( ∑ ⁄ The average value M ̅ for a measured var-
M ) N
i i
iable is obtained by totaling a whole series of measured
values M i and then dividing by the number of measured
values N.
If, in function selection, averaging is selected a new selection menu will appear
listing the various 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, averaging over time,
over cycles, or over specified measuring points.
For flow sensors a special menu for array meas-
uring as per VDE is provided.
To select the averaging menu press key(s) :
To clear averaging for the selected channel press :
Smoothing meas values by means of a sliding av-
12.2.1
erage
The first method for averaging applies exclusively
to the measured value of the selected channel; it
is used to smooth measured values of an unstable
or strongly fluctuating nature, e.g. especially tur-
bulent flows, by means of a sliding average over a
specified time frame. The level of smoothing can
be set in the
Smoothing
the
number of measured values to be averaged (possible range 0 to 99). The
smoothed measured value can thus also be used in all subsequent evaluation
functions in combination with averaging over individual measured values (see
S-4
P-04
C-04
function; here you specify
12. Function menus
response:
Memory:
P01: 00: +022.12 °C
P02: 00: +022.12 °C
P03: 10: +0039.9 %H
P04: 10: +0039.9 %H
P05: 20: +0007.6 °C
 
and
<CLR>
or
PROG
37