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118

Dran-View 6 User Guide

Harmonics

Setup Page

(Continued)

Expansion type

This option allows you to choose if sine or cosine expansion

should be used when calculating harmonic phase angles. If you

are unsure of which mode you should use, sine is recommended.

This option is not available to phasors.

Phase angle

normalization

This option allows you to choose how phase angles should be

normalized. The channel used for normalization always has a

value of zero at all points.

This option is not available to phasors if you have selected the

"Normalize to selected harmonic" option on the General page.

DFT Chart

specific

settings

Connected to This option lets you choose an Event Details/Waveforms chart in

which to connect the DFT chart to. The Event Details/Waveforms

chart must be located in the same view. The selected chart's area

marker is used as a time base for DFT calculations. See DFT

Chart for more information about this.

When changing the selection in this combo box, a green border

will surround the corresponding Event Details/Waveforms chart.

Show

THD/DC/FND

These checkboxes allows you to show and hide DC, THD, and

FND. THD will be displayed to the left of 0 (at a negative

frequency on the X-axis). Hiding the fundamental may make the

DFT chart easier to read as it normally has a significantly higher

magnitude than the harmonics.

Display DFT

chart X-axis as

Select whether you wish to have harmonic and interharmonic

indexes on the X-axis or frequency. Note that this only affects the

X-axis labels. The delta tool and the axis status bar will always

display frequency.

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Dranetz Guide Guia do Utilizador Página 118