15
Instruction Manual
CIRWATT B 101-102
established by the dates of daylight saving time, with no need for any further parameterisation, since
they are adjusted automatically every year. The automatic time change option can be disabled.
2�17�2 - TARIFF PERIODS
A tariff period is an hourly block in which a specific tariff is applied. There will be a minimum of one
hourly block and a maximum of three hourly blocks. Each period is identified with a growing number,
starting at 1 on the lower part of the screen (T8).
2�17�3 - TYPES OF DAYS
A type of day is defined as the set of tariff periods assigned to each of the 24 hours of a day.
Each type of day is identified with a number, starting at 1 and increasing by one for subsequent types.
There is only one type of day.
2�18 - CLOSE OF BILLING PERIOD
The energy meter stores the billing closures (or monthly summary) with the programmed date and
time, the absolute total values of the energy magnitudes measured by the energy meter (A+, A-, R1, R2,
R3, R4), including both total values by tariff periods, and those accumulated since the last closure until
the current closure, to be displayed (from the energy meter’s start-up in the case of the first closure).
In addition, the maximum average quarter-hour active power calculation will be stored from the last
closure (maximeter, corresponding to magnitude A+). The units will be expressed in Wh for active en-
ergy and Varh for reactive energy.
Each closure will have an associated date and time. The energy meter must keep a log of the last 12
closures. The energy meter automatically performs the billing closure at 00:00 hours on a determined
date, which will match the end of an hourly integration period.
2�19 - MAXIMETER
The maximum refers to the highest value of average active power demanded in a 15-minute period in
the time between two consecutive billing period closings.
The 15-minute periods will coincide with the integration periods of the 15-minute load curve; that is,
for each hour, they will start at minute 0, 15, 30 and 45, ending when the next period begins. The max-
imum values are expressed in absolute value in W.
2�20 - EVENTS
The dates of every setup change, battery replacement, time change, billing period closings, etc., are
recorded.
The meter is capable of storing up to 128 records
. The data organisation within the file is rotational.
This means that once the memory is full, the new data will overwrite the older data (FIFO type). This
system ensures that the meter always has up-to-date information that corresponds to the latest data
obtained.
