SGM3000 Series Smart Meters
User Manual
36
GEH-7111-1.00-2
Restricted
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Calculation of cumulative values at the point of a demand reset, where the cumulative
values are the current values summed with the previous cumulative value.
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Cumulative maximum demand
Demand Reset
The SGM3000 Series meters support a demand reset of demand data via a communication
command. The demand reset will initiate local recording and remote recording, via the AMI
interface, of demand data with a date and time stamp. The demand reset will reset all
maximum and minimum demand values. The meters will maintain a count of the number of
demand resets.
Data Accumulations
Data accumulations operate in the same manner as summations, except that they are not
sorted by TOU rate, nor are they snapshots of demand reset, season change, or self-read.
The summations, demand calculations, and load profile data are subsets of the selections in the
list of specified data accumulations. The list of quantities for the data accumulations feature is
configurable. During meter initialization, the values of the data accumulation quantities that
were saved at power fail will be retrieved. Each minute, the meter will update the data
accumulations with the data accumulated during that minute.
When a power failure is detected, the meter will process the data accumulated since the most
recently completed minute.
Storage of Accumulation/Demand Data
The SGM3000 Series meters support the following accumulation and demand data:
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Local recording of accumulation/demand data on a daily schedule
Daily scheduled recording will occur at 0:00 midnight.
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Local recording of accumulation/demand data on a weekly schedule
Weekly scheduled recording will occur at 0:00 midnight on Sunday
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Local recording of accumulation/demand data on a monthly schedule.
Monthly scheduled recording will occur at 0:00 midnight on the last day of the month/first
day of the next month.
The SGM3000 Series meters will have memory to record a minimum of 53 instances of
accumulation/demand data, with a minimum of 8 data values per instance. The meter will
overwrite the oldest accumulation/demand data first in the event that all memory allocated to
accumulation/demand storage is consumed. The meter will generate a memory full event for
the first time data is overwritten without subsequent intervention to free up memory. The
memory full event is classified as a critical priority event by default. The meter will send a
notification message via the AMI signal.
