Configuring The Waveform Recorder - Satec Expertmeter EM720 Operation Manual

Chapter 5 Configuring the EM720

Configuring the Waveform Recorder

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The EM720 can store input waveforms in three log files.
Waveform log #1 and Waveform log #2 are conventional
files that can record waveforms at four programmable
sampling rates: 32, 64, 128 or 256 samples per cycle. A
conventional waveform log file can store up to 7 channels
simultaneously: three voltage channels and four current
channels.
Waveform log #3 is pre-configured for fast transient
recording. It stores a 1-cycle waveform at a rate of 1024
samples/cycle. It is only operational in the EM720T. If you
have a basic EM720 model, you can remove it and re-
allocate storage for other files.
A single-channel waveform record always contains 512
points of the sampled input signal. If a waveform log is
configured to record more samples per event than a single
record can hold, the waveform recorder stores as many
records per event as required to record the entire event.
All waveform records related to the same event are
merged in a series and have the same series number, so
they can be easily plotted together.
To configure a waveform log file:
1. Double click on a waveform log partition with the
left mouse button.
2. Select a file type for your file.
3. Select the maximum number of records you want to
be recorded in the file.
4. The number of records required to store a single
waveform series per event is defined as follows:
Number of Records per Series = Sampling Rate (Samples per
Cycle) x Number of Cycles per Event / 512
5. The total number of records you should allocate to
store the required number of events (series) is
defined as follows:
EM720 Power Quality and Revenue Meter
Configuring Recorders