ZES ZIMMER LMG450, Руководство пользователя

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Z E S ZIMMER Electronic Systems GmbH Chapter 15
279
Catchword Meaning
input power of an E. U. T.
EN61000-3-2, EN61000-4-7
EN61000-3-3, EN61000-4-15
Standards which describe the harmonic measuring
Standards which describe the flicker measuring.
End of string character ‘<lf>‘, ‘<cr>, <cr><lf>‘ are examples for EOS characters.
Energy Integration of the power which is consumpted by a
consumer or a device in a defined time.
envelope It is the curve which covers a mixed frequency signal
connecting the peak values of the fast frequency; a curve
defined by EN61000-3-2 to define if a device belongs to
Class D or not.
EOS
⇒
End of string.
Equipment under test
⇒
D. U. T.
ESC key Key used to cancel an entering mode and to quit an error
message.
Extended Trigger Mode in which the trigger conditions can be set up very
differentiated to measure even modulated signal.
External current transformer Device to transform high currents to lower ones.
External shunt Changes currents into voltage with defined ratio.
External synchronisation jack Input for an external synchronisation source.
F
Falling edge Opposite of rising edge; the logic signal turns from the high
potential to the lower one.
FIFO First in first out; method how the in- and output of memory
is handled.
Filter Device which cuts off frequencies which are not useful; e.g.
high pass filter cuts off low frequencies.
Flicker meter Device to measure flicker levels.
Fluctuating harmonics Harmonics not constant over time.
Form factor Ratio of TRMS value to rectified value; older meters could
only measure the rectified value and multiply it with the form
factor to get the TRMS value. The problem is, that the form
factor depends on the wave form. So with other wave form
you get an error. Modern instruments like the LMGs
measure independent to the form factor, so you measure
always correct.
Formula editor Here you can set up formulas which will calculate different
parameters from the measured values.
Freeze The display values are not updated any more.