Satec Expertmeter EM720 Operation Manual page 19

Chapter 2 Operating the EM720
Tariff Rates
End of Billing
Billing Data Recording and Load Profiling
Billing Data Display
EM720 Power Quality and Revenue Meter
registers providing the same demand tariff structure as
you selected for energy registers.
The meter tariff structure supports 8 different tariff rates
using an arbitrary tariff schedule. A total of 4 types of
days and 4 seasons are supported with up to eight tariff
changes per day.
The EM720 TOU calendar provides a season tariff schedule
and an option for scheduled daylight savings switch dates.
The present tariff rate is indicated on the EM720 display.
If required, tariff-switching pulses with a programmable
duration can be output via the meter relays.
The EM720 can be configured to trigger a reset of billing
maximum demands
automatically on a monthly schedule, manually from the
front display and remotely via communications. It can also
be done via control setpoints using any programmable
internal or external trigger, like a specific time schedule or
an external pulse.
You can select the reset sources via the Device Options
setup (see Device Options and Mode Control
5).
The EM720 uses a one-day protection lockout time to
avoid multiple consecutive resets of the billing maximum
demands.
The EM720 provides automatic recording of the billing
data to flash files:
• Monthly billing period data for the last 24 billing
periods
• Daily energy and maximum demand profile for the
last 120 days
• 15-min energy load profile for 120 days or 30-min
profile for 240 days.
Maximum demand profiling for monthly and daily billing
data profiles can be individually configured for every
register.
See Factory Preset Data Log Files
and Load Profile Log Files
information on the file layout and contents.
The EM720 display indicates billing energy, maximum
demand and cumulative maximum demand registers for
Billing and Energy Metering
and an end of
in Chapter 5 and
in Appendix C for more
billing period
in Chapter
Billing
19