Ahlborn ALMEMO 2690-8A, Operating Instructions Manual

Page: 39 / 88

10. Measuring using Measuring-Menus
39
1. Stop measurement, if it is started:
<STOP>
2. Set the averaging mode (s. 9.5):
Averaging mode: CONT
For smoothing a meas. value select damping:
Damping: 20
Switch the continuous scanning off, if required:
Conv. rate:10M/sCont: -
3. Clear avg. value by selecting it (s. 9.4) and using: <CLR>
Function ´Average value´ displays:
Average val: ----- m¡
Function ´Counts´ displays:
Counts: 00000
4. Manual scans Ex of single measurements:
<MANU>
Function ´Average value´ displays:
Average val: 12.34 m¡
Function ´Counts´ displays:
Counts: 00001
5. Repeat step 4 for each measuring point.
6. Output of all function values of the menu by using:
<PRINT>
10.4.4
Array Measurement
Especially when determining the average veloc-
ity in a flow conduit according to the guidelines
VDI/VDE 2640, measurements are to be carried
out in a net of individual points in a cross-section
which is placed vertically with respect to the flow
direction (s. man. 3.5.5). A special menu for net
measurements is available to record all single
values or to have the possibility to repeat error
measurements. It can be selected in the function
´Average value´, using the key
<ARRAY>
. The
menu can be used for other point measure-
ments, too, of course.
1. The Averaging mode is not important:
AveragingMode: ----
For smoothing a meas. value select damping:
Damping: 20
2. Select function average value:
AverageValue: -----
3. Select menu net measuremet using the key:
<ARRAY>
4. For data recording, press the key:
PROG
5. Set the number of points:
Net measurement Points: 5
A cleared array appears: 01: --.-- m¡
6. Select a measuring point using the key:
  01 : --.-- m¡
7. Start the measurement with key:
<START> 01 : 11.22 m¡
Net measurement Points: 5
01: 11.43 m¡
02: 12.51 m¡
03: 19.71 m¡
04: --.-- m¡
05: --.-- m¡
Avarage value: 14.51m¡
STOP CLEAR F ESC