User's Manual

Operation: C1SD, C1ST, and C1SL Versions
5-16 CENTRON Meter Technical Reference Guide
Rate Schedules
Four independent rates are available for TOU registration-designated A, B, C, and
D. Only one of these rates can be active at a time. The Total register is always
active, regardless of the active rate period. The currently active rate is indicated by
a flashing rate-specific annunciator.
Daily Schedules
Up to four daily schedules are available. Each schedule defines the beginning and
ending time of each of the four available rate periods (A, B, C, and D). Up to 32
switch points per rate may be specified for each daily schedule.
Weekdays, Saturday, Sunday, and holidays can be assigned to one of the four daily
schedules. Therefore, one to four daily schedules may be used in any combination
with the days of the week.
Seasonal Schedules
A season is a period of continuous days during the year when a particular rate
schedule is in effect. The year can be divided into a maximum of eight seasons. If
multiple seasons are not used, the TOU schedule contains one year-round season.
The Daily Schedules can be defined differently for each season. Up to eight Season
Change dates are specified for each year in the Calendar Schedule.
Season changes occur at midnight of the Season Change date (where midnight
corresponds to 00:00 hours) or can be programmed to occur at the first demand
reset following the Programmed Season Change date.
Holiday Schedules
Up to twenty-two holidays can be designated per year in the Calendar schedule.
One of the four Daily schedules is assigned to each of the Holidays in the Calendar
Schedule.
Daylight Savings Time
Daylight Savings Time switch points occur at 2:00 A.M. on the first Sunday in April
and the last Sunday in October. These dates are pre-assigned in the Calendar
Schedule; however, they can be modified by the user. The user can also elect not to
recognize Daylight Savings Time and operate the meter in standard time only.
Registers
Current Season Register
All energy and demand registers selected for the active season are considered
current season registers. If a single rate schedule is applicable year-round, then
only current season registers are used.