6-6
IM WT5000-01EN
Data Update Interval (Update rate)
The data update interval is the interval at which the data that is used in measurement functions is sampled.
Update Mode (Update Mode)
Select the trigger for updating data from the following options.
• Constant interval (Constant)
• Trigger (Trigger)
Constant Interval (Constant)
At each data update interval, the numeric data is updated, stored, transmitted through a communication
interface, and converted and output as analog signals.
The measurement mode display at the upper right of the screen shows Normal Mode.
To capture relatively fast load fluctuations in the power system, select a fast data update rate. To capture low
frequency signals, select a slow data update rate.
Trigger (Trigger)
Numeric data is updated once according to the waveform display trigger operation.
The measurement mode display at the upper right of the screen shows Normal Mode (Trg).
If the update mode is set to trigger, measurement takes place from when a
trigger
is detected over the data
update interval. The following amount of time is required for the instrument to compute the measured data,
process it for displaying, and so on, and become ready for the next trigger.
• When the data update interval is 50 ms to 500 ms: Approx. 1 s
• When the data update interval is 1 s to 20 s: Data update in 500 ms
In this case, storage, communication output, and D/A output operate in sync with the triggers.
If the update mode is set to constant interval, storage, communication output, and D/A output operate in sync
with the data update interval.
• If you do not set the trigger level properly, the waveform display start point (the signal level on the left edge
of the screen) may be unstable, or waveforms may not appear.
• Even when the update mode is set to trigger, the mode is set to constant interval in the following situations.
• During integration
6 Computation and Output
