ZES ZIMMER LMG450, Руководство пользователя

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Z E S ZIMMER Electronic Systems GmbH Chapter 6
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6.4.1 Default
With Default you see the most important values of the instrument. For the handling please see
the general description in chapter 5.4, ‘Display of values’.
6.4.2 Voltage
With Voltage you see the harmonic values of the measured voltage and in the second row the
allowed limits in this voltage (if you see a single channel). A ‘!’ between the two rows shows
that the measuring value is bigger than the limit. In this menu you see always the evaluation of
the actual measured window!
With the arrow keys or with the shuttle knob you can scroll through the list to see all
harmonics.
In the top line you see the total trms value of the signal and the frequency of the
synchronisation source.
Below the softkeys you see the result of the complete voltage judgement: a ‘
9‘ indicates that
all requirements of the standard are met. A ‘
8‘ indicates a fault measuring result. This result is
only the result of the actual measuring and not influenced by earlier measurements.
Figure 32: Display of voltages in prCE-Harm mode
6.4.3 Current
With Current you see the harmonic values of the measured current and in the second row the
allowed limits in this current. A ‘!’ between the two rows shows that the measuring value is
bigger than the limit. A ‘?’ between the two rows shows that the measuring value is bigger
than 100%, but smaller than 150% of the limit (which is important for fluctuating harmonics!).
This special evaluation is only valid for the harmonics of order 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13,
15, 17 and 19. The ‘?’ indicates that the harmonic might be outside the standard if the ‘?’
appears for more than 10% of a any 2.5min windows.