ZES ZIMMER LMG450, Руководство пользователя

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Z E S ZIMMER Electronic Systems GmbH Chapter 9
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9 Transient mode (option L45-O5)
In the transient measuring mode the LMG450 works as a transient recorder. You can define
special events. If they occur the measuring is stopped and you can analyse the signal.
9.1 Measuring configuration (Measuring)
When you came to this menu by pressing Measure you first have to choose MODE and then
TRANS to enter this mode. The well known setting menu with the three tabs („Globals“,
„Group A“ and „Group B“) opens:
9.1.1 Globals tab
Here you can set up the wiring in which is measured and general conditions which are equal for
all groups.
By pressing the rotary knob, you can setup the following values:
TDur This is the minimum duration of the event. If you for example set this value to 5ms
and check for an over limit, the signal has to be over the limit for 5ms until the event
is generated.
TRec This is the recording time. The signal is recorded for this time to the memory. If you
have more memory, it might be recorded for a longer time.
Please note: If your memory is too small and/or you want to record too much signals
the recording rate might be reduced. This has no influence on the sampling rate or on
the event detection.
PreTr This is the pretrigger duration in %. If you for example have a record time of 200ms
and 50% pretrigger you will get at minimum 100ms before the event and exact 100ms
after the event.
Wire Here you can setup, with which wiring you want to measure. Please see chapter 2.4,
‘The group concept’ for further details.
If a linked wiring is used, only the linked channels can generate a trigger event.
9.1.2 GroupA/B tab
The settings in all groups are identical, so they are just described once!