7.1.5 Averaging
The average value of the measured value is required for various applications:
e.g.
- the average flow velocity in a ventilating channel
- smoothing of a largely varying measured value (wind, pressure etc.)
- 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 measured
M
values M
i
are added together and then divided by the number N of measured
values:
Average Value
M=
i
(
Σ
M
i
)/N
Three functions, AVERAGING MODE ´AM´, AVERAGE VALUE ´AV´ and COUNT ´ C´
(function activation, see 5.2) are available for using the average value.
The type of averaging is determined by the averaging mode ´AM´ and can be
selected with the key F2.
Function AVERAGING MODE ´AM´
Selection with the key F2... ...
F2
1:S t S t P AM
The following modes can be set with the keys long, ▲ ▼,
▲
PROGR
▲
PROGR
if a sensor with an ALMEMO
®
connector is connected:
Function Display
No averaging: - - - -
Averagi
ng over Measuring Point Scans:
Continuous averaging over all measuring point scans: C o n t
Averaging over all measurements of a print cycle: C Y C L
Manual
Averaging over Measured Values of a Channel:
Continuous average value from start to stop via keyboard S t S t P
Aver. val. over single measurements that are captured via 'hold' S i n G L
In this section manual averaging over measured values of the selected channel
will be described. The averaging over measuring point scans can be found in
the manual section 6.7.4.
Averaging over Time
To obtain the average value of all measured values of a measuring channel
over a specified time period, the averaging mode ´StStP´ must be set for the
selected measuring channel. For example, by uniformly scanning an area, this
mode also allows to determine the average flow velocity in a ventilating channel
(see manual 3.5.5). For distinguishing between the manual and the cyclic
averaging the following requirements must be met:
ALMEMO
2290-4 31
Continuous Measurement of a Measuring Point
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