Ahlborn ALMEMO 2590-2, Руководство по эксплуатации

Страница: 33 / 76

Averaging
because this would at many measuring points
reduce the measuring rate too strongly :
Meas rate : 10 mops Cont : -
Time constant (s) = smoothing / measuring rate · 2
How the averaging menus function :
The following averaging menus use some of the standard functions
such as averaging mode, cycle, measuring rate - appropriately repro-
grammed. Data output to the interface and memory is possible but
this must be configured. To also display the average value acquired
as it is being output a function channel M(t) must be activated on
channel M32/33/34 (see 7.2). This will stop any data logger recording
currently running; this will subsequently have to be reinitialized.
11.2.2 Averaging over individual manual meas operations
To obtain the average of individual measuring
operations at particular locations or times select
the menu
average value over measuring op-
erations . Here the individual manual measuring
point scans E
i
can be performed.
1. To select an average value (see 8.4) and to clear it press :
PROG
,
<CLR>
Function
average value
shows :
average value : ----- m¡
Function number over measuring operations shows :
number : 00000 U
To set memory activation, output format :
<MON/MOFF>
,
<FORM> see 11.5.5
2. Acquire individual measured values Ex manually :
<MANU>
Function average value shows :
average value : 12.34 m¡
Function
number
shows :
number: 00001
3. Repeat step 2 for each measuring point.
For flow probes call up the volume menu by pressing :
<VOL ►>
see 11.2.6
11.2.3 Averaging over time
To determine average values over a certain du-
ration there are 2 possibilities - either by pressing
the Start and Stop keys accordingly or by enter-
ing a duration for averaging which is started
manually but stops automatically. A measuring
point scan is always performed at start and stop
in order to record to memory the start value, end
value, and average value - each with the applica-
ble time-of-day (see 11.5).
ALMEMO ® 2590 33
M
=
∑
i
E
i
/
N
E1 E2 E3
E4
MANU MANU MANU MANU CLR
13: 25.45 m/s
L840 flow
Average value
24.57 °C
Measuring duration
00:01:30.56 U
START Mªª M VOL© FCT
13: 25.45 m/s
L840 flow
Average value
24.57 °C
Number 00013 U
MANU Mªª M VOL© FCT
