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TECHNICAL NOTE
Time Synchronization & Timekeeping
Time synchronization lets you synchronize the internal clocks of all networked
meters and devices. Once synchronized, all data logs have timestamps that are
relative to a uniform time base. This allows you to achieve precise sequence-of-
events and power quality analyses. To synchronize clocks, use ION
®
software or a
Global Positioning System (GPS) receiver to broadcast time signals across the
network.
In This Document
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348
Clock Module Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
Time Synchronization: ION or GPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351
ION Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351
GPS Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Diagnostics and Event Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Diagnostics Module Output Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Event Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Time-Synchronization Blackout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Changing Default Blackout Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357