Gossen Metrawatt M817R Mains-analysis device, Mains analyser M817R Scheda Tecnica

3-14

Harmonic Detail

The Energy Platform allows users to determine the numbers or the range of harmonic 

frequencies to trend. A blue box showing the default zoomed area appears once the 

Detail button is pressed. Touch any side of the zoom box to activate the drag function. 

Touch and drag the sides of the zoom box to expand or narrow in on a select number of 

harmonic/interharmonic graphs. The zoom box moves horizontally only. The vertical 

scale will autoscale when zoomed.
NOTE: To select whether the vertical is scaled to the fundamental or the greatest 

harmonic, use the Options key (see page 3-15). 

The magnify buttons serve as zoom function keys, each of which feature a plus sign or 

a minus sign within. Press Zoom+ to display the zoomed area and view harmonic 

graphs in greater detail. Users may repeatedly zoom in on a plot for up to seven (7) 

levels. Press Zoom-(n) to unzoom graph display one increment at a time, where n is the 

counter of how many times the harmonic graphs have been magnified.

touch and drag zoom box to 

desired magnification scope

MARK235

MARK235b

MARK235c

harmonic data plot

(shown in channel color)

interharmonic data plot

(shown in gray)

Fundamental exceeds 

square so bar extends 

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