9-3
IM WT1801-01EN
Sample Rate, and Valid Frequency Ranges for Integration
The sample rate is approximately 2 MHz. The voltage/current signal frequencies that are valid for integration are
as follows:
Integrated Item
Valid Frequency Range for Integration
Active power
DC to approximately 1 MHz
Current
When integrating Irms DC or the lower frequency limit determined by the data
update interval to approximately 1 MHz
When integrating Imn
DC or the lower frequency limit determined by the data
update interval to approximately 1 MHz
When integrating Idc
DC to approximately 1 MHz
When integrating Irmn DC or the lower frequency limit determined by the data
update interval to approximately 1 MHz
When integrating Iac
The lower frequency limit determined by the data update
interval to approximately 1 MHz
Using an External Signal to Control Integration (Option)
On models with the 20-channel D/A output option, you can use the remote control feature to use an external
signal to start, stop, and reset integration. For details about the remote control feature, see appendix 4.6 in the
getting started guide, IM WT1801-03EN.
Backup When a Power Failure Occurs
• If a power failure occurs when integration is in progress, the integration result is held. When the power
returns, integration is stopped, and the integration result calculated up to the point when the power failure
occurred is displayed.
• After the power returns, you must reset integration to start it again.
Limitations on Modifying the Settings during Integration
During integration, there are some settings that you cannot change and functions that you cannot execute. For
details, see appendix 9 in the getting started guide, IM WT1801-03EN.
Limitations on Waveform Display during Integration
• During integration, the waveform display
does not function. Therefore, the signal level of the waveform
display at the left end of the screen may not be stable.
• During integration, the shortest possible waveform data update interval is 1 s. If you select an update interval
shorter than 1 s, the numeric data and waveform data will contain measured values for different measurement
periods.
9 Integrated Power (Watt hours)
