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7.2 Calculating
The meter can calculate the current active energy, forward active energy, reversing active
energy, forward reactive energy and reversing reactive energy.
7.3 Timing
The meter has 2 time lists, and can be divided into 4 time zones per year. Each time list can
be divided into 8 time periods and 4 tariff (F1、F2、F3、F4). The main purpose of multi-tariff is
promote the energy efficiency and economic benefits.
7.4 Demand
There are some definitions on demand:
The average power in the demand cycle.
The maximum value of demand in a period of time.
A recurrence method to measure the demand from any time point
during a period shorter than the demand period. The demand
measured by this means is called sliding demand. The recurrence
time is sliding window time.
The time period between two same average value of demand.
The default demand cycle is 15 minutes, slip time is 1 minute.
The meter can measure 4 kinds of maximum demand: forward active, reversing active,
inductance performance reactive, capacitance performance reactive maximum demand and the
occur time.
7.5 History data statistics
The meter can record last 48 months or last 90 days history energy in each tariff.
7.6 Switching input and output
The switch input adapts the method of on-off signal input and powered by outer power supply.
It can be gotten by meter when there is a change of on or off via a switching input module. The
parameter of switching input can not only get and show the state of local switching information
but also achieve the communication via RS485, which called “remote information” function.
7.7 Temperature measurement
The meter support three path of outlay NTC temperature measurement, the range of
temperature is -40℃~99℃.
8 Operation and display
8.1 Key function description
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