ZES ZIMMER LMG450, User Manual

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Normal measuring mode LMG450
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to see the real phase shift between the phases.
The voltage measured with the third channel is also inverted.
5.1.2 Group A/B tab
The settings in group A and B are identical, so they are just described once. Each setting
influences all channels which belong to the group!
Sync Selects the signal which is used for synchronisation of all channels belonging to this
group. There are following possible settings:
U The voltage signal is used (channel 1 in group A and channel 4 in B)
I The current signal is used (channel 1 in group A and channel 4 in B)
X Extended Trigger. See Xtrig.
Line The line signal is used
Extn The signal at the external synchronisation jack is used.
Depending on the value of Sync there is one softkey which changes from Xtrig
(setting ‘X’) to Coupl (all other settings).
Coupl Selects how the voltage or current signal is coupled to the following trigger stage.
This setting has no influence on the measured signals!
AC+DC The signal is directly coupled, including all signal parts.
LP<80Hz Low Pass Filter. Only the signal components below 80Hz are used
LP<300Hz Low Pass Filter. Only the signal components below 300Hz are used. This is
very useful, when measuring frequency converters with fundamental
frequencies below 300Hz and clock frequencies above 300Hz.
HP>10Hz High Pass Filter. Only the signal components above 10Hz are used. This is
useful to reject a DC component in the signal.
HP>30Hz High Pass Filter. Only the signal components above 30Hz are used. This is
useful to reject a DC component in the signal.
BP 10-300Hz Band Pass Filter. Only the signal components between 10Hz and 300Hz are
used.
BP 30-80Hz Band Pass Filter. Only the signal components between 30Hz and 80Hz are
used. This is useful when synchronising to line frequent signals with very
much distortion.
AM 10-300Hz Amplitude (De)Modulation. The signal will be demodulated when measuring
AM signals. Only the envelope between 10Hz and 300Hz is used. This is
useful, when measuring electronic gears or transformers.
Xtrig Here you reach a menu where you can define very precise, what should be your
trigger condition. This menu should only be used from very experienced users,
because if you select wrong conditions, you might get wrong measuring results.