12. Function menus
39
For flow probes call up the volume menu by pressing :
<VOL
►
>
see 12.2.6
12.2.3
Averaging over time
To determine average values over a certain dura-
tion there are 2 possibilities - either by pressing the
Start and Stop keys accordingly or by entering a du-
ration for averaging which is started manually but
stops automatically. A measuring point scan is al-
ways performed at start and stop in order to record
to memory the start value, end value, and average
value - each with the applicable time-of-day (see
12.5).
To clear the average value and measuring duration automatically on Start
(see 14.8) or having selected the average value by pressing :
<CLR>
The measuring duration can be read out :
meas duration : 00:01:23.40 U
To set memory activation, output format :
<MON/MOFF>
,
<FORM>
To start
averaging press :
<START>
Verification :
»
To stop
averaging press :
<STOP>
Alternatively
Enter a
certain averaging duration
in seconds,
Select and program the function
Measuring duration
,
The function changes to :
averaging duration : 020 U
To start
averaging press :
<START>
Verification :
»
To stop
averaging after expiry of averaging duration
The average value can be read out
in function:
average value : 13.24 m¡
For flow probes call up the volume menu by pressing :
< VOL
►
>
see 12.2.6
12.2.4
Averaging over the cycle
To determine hourly or daily average values the
average values must be acquired at cyclic inter-
vals. A cycle is programmed to ensure that the av-
erage value, maximum value, and minimum value
are cleared after each cycle but continue to appear
in the display throughout the following cycle.
