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3-15
IM WT5000-01EN
The measurement period for determining the numeric data of the peak voltage or peak current is always the
entire span of the data update interval. Therefore, the measurement period for the measurement functions that
are determined on the basis of the maximum voltage or current value (U+pk, U-pk, I+pk, I-pk, CfU, P+pk, P-pk,
and CfI) is also the entire span of the data update interval.
For details, see appendix 5 in the Getting Started Guide, IM WT5000-03EN.
Measurement Period of Harmonic Measurement Functions
The measurement period is from the first sampled data in the data update interval to 1024 points or 8192 points
(selected with the
setting) counted at the sampling frequency for harmonics.
This instrument determines the harmonic sampling frequency automatically based on the period of the signal
that is set as the PLL source. The sampling data and measurement period that are used to determine the
values of harmonic measurement functions may be different from those used to determine the values of normal
measurement functions.
Sync Source (Sync Source)
Select the signal to use as the sync source from the options listed below. The available options vary depending
on the installed elements. When range Σ link is set to on, elements in the same wiring unit have the same sync
source.
U1, I1, U2, I2, U3, I3, U4, I4, U5, I5, U6, I6, U7, I7, Ext Clk (external clock) 1, Z Phase 1 (Ch D) 2, Z Phase 3 (Ch
H) 2, None
1 When you select Ext Clk, the external signal applied to the external clock input connector (EXT CLK) on
the rear panel is used as the sync source. For the EXT CLK connector specifications, see section 4.3 in the
Getting Started Guide, IM WT5000-03EN.
2 Models with the motor evaluation 1 or 2 option
• If sync source is set to None
All of the sampled data within the data update interval is used to determine the numeric data.
When you are measuring DC signals, this method can be used to prevent noise from causing errors in the
detection of the measurement period.
• When the computing method is sync source period average, if the sync source is not set correctly, the
measured value may fluctuate or be incorrect. See appendix 5 in the Getting Started Guide, IM WT5000-
03EN.
3 Input Settings (Basic Measurement Conditions)