Z E S ZIMMER Electronic Systems GmbH Chapter 7
117
P
lt
is calculated at the end of the long term measuring. Until then it is displayed as ‘-------’.
7.4.6 Graphical
display
Here just the plot function is available. The handling is the same like described in 5.4.6,
‘Graphical display’
But there are some things to know concerning the displayed values:
In the other modes, all values are measured in the same time interval. In the flicker mode there
are two main time intervals: 10ms and 320ms. Most values are updated every 320ms, but some
come every 10ms: They are the momentary flicker level (ID is Pml) and the half wave trms
value (ID is Uhwl). As said above, this values come every 10ms. The Pmoml and Utrms values
are the average values of Pml and Uhwl. So you can see Pmoml and Pml in one graph as
function ‘A’ and ‘B’. Because Pmoml has a slower time base, it is plotted with 32 same values.
7.4.7 Custom
menu
With
Custom you see the custom menu. Here you can setup your own menus, calculate
formulas and execute programs. See 4.4.3, ‘Custom menu’ and 4.4.4, ‘Script/Formula editor’.
7.5
Storage of values
First you have to change to the menu you want to print out or to store and press Print/Log
(exact handling see 11, ‘Logging of values to drives, printer and interfaces’). All the values you
see in this menu are printed out.
7.6
Tests according EN61000-3-3
For tests according to this standard you first have to change the Range to ‘Manual’ mode. This
is necessary because the test has to be done without any gaps.
Switch on the voltage of the EUT. Start the flicker process with Start. After a delay of 8s the
real measuring is started. Now you can switch on the EUT to get the different values. If you
want to stop the measuring before the end of the long term time just press Stop.
Annex B.2
Usually the values d
c
and d
max
run for the whole observation period (Plt-time). To simplify tests
according annex B.2 of EN61000-3-3:2008, you can choose, that these values are reset after
each short term observation periode. To do this, please select the B2 item in measuring menu,
softkey EN.
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