CHAPTER 8: TIME-OF-USE FUNCTION UPDATING, RETRIEVING AND REPLACING TOU CALENDARS
EPM 9450/9650 ADVANCED POWER QUALITY METERING SYSTEM – INSTRUCTION MANUAL 8–3
8.4 Updating, Retrieving and Replacing TOU Calendars
GE Communicator software retrieves TOU calendars from the EPM 9450/9650 meter or
from the computer's hard drive for review and edit.
Up to a maximum of twenty yearly calendars can be stored in the EPM 9450/9650 meter at
any given time. You may retrieve them one at a time; a new calendar can be stored while a
current calendar is in use.
Accumulations do not stop during calendar updates. If a calendar is replaced while in use,
the accumulations for the current period will continue until the set end date. At that point,
the current time will become the new start time and the settings of the new calendar will
be used.
Reset the current accumulations, if you replace a calendar in use. A reset clears only the
current accumulation registers. This causes the current accumulations to use the present
date as the start and accumulate to the next new end date, which will be taken from the
new calendar. Once stored, prior accumulations are always available and cannot be reset.
See the GE Communicator Instruction Manual for instructions on resetting TOU
accumulations.
At the end of a defined period, current accumulations are stored, the registers are cleared
and accumulations for the next period begin. When the year boundary is crossed, the
second calendar, if present, is used. To retain continuity, you have up to one year to replace
the old calendar with one for the following year.
8.5 Daylight Savings and Demand
To enable Daylight Savings Time for the meter: from the Device Profile menu click General
Settings > Time Settings. In the Time Settings screen, click Auto DST, which sets Daylight
Savings Time automatically (for the United States only). You can also select User Defined
and enter the desired dates for Daylight Savings Time. See the GE Communicator
Instruction Manual for instructions.
To set Demand intervals: from the Device Profile menu click Revenue and Energy Settings
> Demand Integration Intervals and set the desired intervals. See the GE Communicator
Instruction Manual for instructions.
To set Cumulative Demand Type, from the Device Profile menu click Revenue and Energy
Settings > Cumulative Demand Type and select Block or Rolling Window Average. See
the GE Communicator Instruction Manual for instructions.
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