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A power-supply outage of the 3169-20/21 may occur for various
reasons during measurement. Such an outage will stop the mea-
surement operation, but the 3169-20/21 has a function for backing
up the measurement data and settings made prior to the outage.
Clock
Continues to run
Settings
All settings are retained.
Measurement data
The maximum, minimum, and average values and integrated
power measurements taken up to the outage are retained. The
demand value at the demand time (i.e., the penultimate time before
the outage) is retained. When time-series measurement is per-
formed at a short-term intervals (all wave/100 ms/200 ms/500 ms),
the data obtained up until 10 seconds prior to the outage is
retained.
Operations in the Event of
Power Outage
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