Schneider Electric PM870, PM820, PM810 Waveform Storage, How the Power Meter Captures an Event

PowerLogicTM Series 800 Power Meter	63230-500-225A2
Chapter 8—Waveform Capture	3/2011

Initiating a Waveform

Using PowerLogic software from a remote PC, initiate a waveform capture manually by selecting the power meter and issuing the acquire command. The software will automatically retrieve the waveform capture from the power meter. You can display the waveform for all three phases, or zoom in on a single waveform, which includes a data block with extensive harmonic data. See your software’s online help or documentation for instructions.

Waveform Storage

The power meter can store multiple captured waveforms in its non-volatile memory. The number of waveforms stored is based on the number selected. There are a maximum of five stored waveforms. All stored waveform data is retained on power loss.

Waveform Storage Modes

There are two ways to store waveform captures: “FIFO” and “Fill and Hold.” FIFO mode allows the file to fill up the waveform capture file. After the file is full, the oldest waveform capture is removed, and the most recent waveform capture is added to the file. The Fill and Hold mode fills the file until the configured number of waveform captures is reached. New waveform captures cannot be added until the file is cleared.

How the Power Meter Captures an Event

When the power meter senses the trigger—that is, when the digital input transitions from OFF to ON, or an alarm condition is met—the power meter transfers the cycle data from its data buffer into the memory allocated for event captures.

Channel Selection in PowerLogic Software

Using PowerLogic software, you can select up to six channels to include in the waveform capture. See your software’s online help or documentation for instructions.

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