YOKOGAWA WT500 User Manual page 218

8.4 Setting Which Measurement Functions to Display Using Trends
Explanation
8-6
You can select what functions you want to display the trends of. You can set functions for
eight trends from T1 to T8.
Selecting a Measurement Function
The types of measurement functions that can be selected are the functions described
in "Types of Measurement Functions Used in Normal Measurement" and "Measurement
Functions Used in Harmonic Measurement (Optional)" in section 2.2, in "User-Defined
Functions" in section 2.5, in "Integration Functions" in section 2.6, and in "Delta
Computation (Optional)" in section 5.17.
Selecting an Element or Wiring Unit
• You can select an element/wiring unit from the choices below. The selectable items
vary depending on the number of elements installed in the WT500.
Element1, Element2, Element3, or Σ
• If an element in the selected wiring unit does not exist, because there is no data, the
trend will not be displayed. For example, if an element assigned to Σ does not exist,
trends are not displayed for Σ measurement functions.
Selecting a Harmonic Order (Only on models with the harmonic
measurement option)
You can set the harmonic order to Total or to a harmonic from dc (0th) to the 50th
harmonic.
Note
• For the meanings of the displayed measurement function symbols, see section 2.2,
"Measurement Functions and Measurement Periods"; section 2.5, "Computation"; section 2.6,
"Integration"; and appendix 1, "Symbols and Determination of Measurement Functions."
• For information about wiring unit
• If there is no numeric data, a trend will not be displayed.
• You can set the harmonic order to Total or from dc (0th) to the 50th harmonic. However,
only the data of harmonics up to the maximum harmonic order value, which is determined
automatically based on the PLL source frequency (see section 6.4 for details), is measured.
• If you change one of the trend measurement functions, the displays of all trends up to that
point are cleared, and the trends start over from the right edge of the screen.
• When the trend of a user-defined function (F1 to F8) is displayed, the trend will not be
cleared even if you change the function's equation.
• When the trend of a delta computation function (
be cleared even if you change the delta computation mode. (The delta computation feature
is an option.)
Σ
, see section 4.2, "Selecting a Wiring System."
Δ Δ
F1 to F4) is displayed, the trend will not
IM 760201-01E