Ahlborn ALMEMO 204, Operating Instructions Manual

Page: 35 / 72

Averaging
For flow probes call up the 'volume' menu by pressing:
<VOL ►>
s. 14.2.6
14.2.3 Averaging over time
To determine average values over a certain du-
ration there are two possibilities - either by press-
ing the 'start' and 'stop' keys accordingly or by
entering a duration for averaging which is started
manually but will stop automatically. A measur-
ing point scan is always performed at start and
stop in order to record the start value, end value,
and average value - each with the applicable
time-of-day.
To delete the average value and actual measuring duration automatically on
start (s. 16.9) or on selecting the average value press
<CLR>
Read out the measuring duration in the function
M. Duration: 01:23.40 U
Start averaging
<START> Verification:
»
Stop averaging
<STOP>
Or, alternatively
To enter a certain averaging duration in seconds, select and program the func-
tion
Meas. Duration
,
The function changes automatically to
Aver. duration: 020 U
Start averaging
<START>
Verification:
»
Stop averaging after expiry of averaging duration
Read out the average value in the function:
Aver. Value: 13.24 m¡
With flow sensors calculate volume
<VOL ►>
s. 14.2.6
14.2.4 Averaging over a cycle
To determine hourly or daily average values the
average values must be acquired at cyclic inter-
vals. An output cycle is programmed to ensure
that the average value, maximum value, and
minimum value are cleared after each cycle but
continue to appear in the display throughout the
following cycle.
ALMEMO ® 204 35
Measuring rate m
i
M
Start Stop
Measuring rate m
i
m
1
m
2
Zyklus Display m
1
0.0:
25.45
°C
Ntc Temperature
Average value:
24.57 °C
Cycle-Timer: 00:02:30 U
START Mªª M FCT
1.3:
25.45
m¡
L840 Flow
Average value:
24.57 m¡
M. duration: 00:01:30.56 U
START Mªª M VOL© FCT