YOKOGAWA wt3000 User Manual

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IM 760301-01E
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App
Index
Trend Display
Explanation
Set the item to be shown on the trend display. You can set 16 lines of trends, trend 1
(T1) through trend 16 (T16).
• Selecting the Measurement Function
• The measurement functions that can be selected are the items that are indicated in
“Types of Measurement Functions during Normal Measurement” of section 2.2,
“User-Defined Function” and Corrected Power of section 2.5, “Measurement
Functions of Integration,” “Motor Evaluation Function (Motor Version),
*1
” “Delta
Computation (Option),
*1
” and “Harmonic Measurement (Option)
*1
” in section 2.6.
*1 For details, see the Expansion Function User’s Manual IM760301-51E .
• Selecting the Element/Wiring Unit
• You can select the element/wiring unit from the choices below. The selectable
items vary depending on the installed elements.
Element1, Element2, Element3, Element4,
ΣA, and ΣB
• If there are no elements that are assigned to the selected wiring unit, there is no
numeric data. Thus, the trend is not displayed. For example, if elements are
assigned to ΣA and no elements are assigned to ΣB, then the trend of the
measurement function for ΣB is not displayed.
• Changing the Harmonic Order (Applicable Only on Models with the Harmonic
Measurement Option)
The measured order can be set to normal measured value (---) or from dc (0th order)
up to 100th order.
Note
• For the meanings of the measurement function symbols that are displayed, see section 2.2,
“Measurement Functions and Measurement Periods,” 2.5, “Computation,” 2.6, “Integration,”
and appendix 1, “Symbols and Determination of Measurement Functions.”
• For details on the wiring units expressed as ΣA and ΣB, see section 4.1, “Selecting the Wiring
System.”
• The trend is not displayed where the measurement function is not selected or where no
numeric data is present.
• The measured order can be set to normal measured value (---) or from dc (0th order) up to
100th order. However, the numeric data up to the upper limit of the measured order (see the
Expansion Function User’s Manual IM760301-51E ) that is automatically determined from the
minimum measured order (Min Order) to the PLL source frequency is the data determined by
the harmonic measurement.
• If the trend display target is changed, all past trend displays are cleared, and the trend display
starts from the right end.
• In wide bandwidth harmonic measurement mode on models with the advanced computation (/
G6) option, the total value is displayed in place of the normal measured value (---) for the
order setting. However, the trend of the total value cannot be displayed, because trends
cannot be displayed in wide bandwidth harmonic measurement mode. If the mode is switched
to normal measurement in this condition, the normal measured value (---) is displayed as the
order.
7.3 Selecting the Trend Display Target

YOKOGAWA wt3000 Specifications

General

Frequency Range	DC, 0.1 Hz to 1 MHz
Number of Input Elements	Up to 4 elements
Harmonic Measurement	Up to 500th order
Interfaces	USB, Ethernet, RS-232
Sampling Rate	2 MS/s
Voltage Range	1.5 V to 1000 V
Display	8.4-inch LCD