7-6
IM WT3001E-51EN
Measurement Period of Harmonic Measurement Functions
The measurement period is the first 9000 points from the beginning of the data update
interval at the harmonic sampling frequency. The sampling frequency for harmonic
measurement is automatically determined in this instrument from the period of the
signal set as the PLL source. The sampled data and measurement period on which
computation is based may be different from those of the measurement functions of
normal measurement.
Numeric Displays for Harmonic Measurement
In addition to 4-item, 8-item, 16-item, and all-item displays, list display (single list and
dual list) can be shown.
• Selecting the Number of Displayed Items
You can select 4, 8, 16, or All for the number of displayed items. Not all the data can
be displayed on one screen. You can scroll through the displayed items to view the
following data.
8-Item Display Example
Measurement function
Data
• List Display
For each measurement function, the numeric data of the fundamental and all
harmonics can be displayed in two columns. When the numeric data is displayed
simultaneously with waveforms, bar graphs, or trends, approximately half of the data
is displayed.
• Single List
The data of a single measurement function is displayed by separating the even
and odd harmonics in each column. You can select the following measurement
functions: U, I, P, S, Q, λ, φ, φU, φI, Z, Rs, Xs, Rp, and Xp.
Measurement function 1
Numeric data of each
harmonic order
Measurement function display
Data related to all harmonics
Data of each harmonic order
Relative harmonic content of each harmonic
(Uhdf, Ihdf, and Phdf are displayed when the
selected measurement function are U, I, and
P, respectively.)
7.1 Harmonic Measurement Function
