Resolution; Accuracy; Total Energy Registers; Rated Energy Registers - Landis+Gyr E470 Series User Manual

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8.2

Resolution

8.3

Accuracy

8.4

Total energy registers

8.5

Rated energy registers

8.6

Average and maximum demand

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The internal meter energy registers have a resolution of 1 Wh (VArh, VAh)
with a range from 000,000.000 to 999,999.999 kWh.
In normal operation, the energy registers are displayed using 5 digits on the
lower line of the display and no decimal places. However, energy registers
can also be displayed with 2 decimal places when in IST display mode (see
section 14.12.1).
In normal operation, the energy registers are displayed truncated to 0
decimal places. This leads to the loss of the un-displayed digits, hence the
value displayed is slightly less than that stored. Accurate register display is
achieved by putting the meter into IST mode.
The measurement accuracy of the meter is in accordance with the following
standards:
•
MID Class B for active energy (kWh) (within 1% accuracy)
•
IEC Class 2.0 for reactive energy (kVArh) (within 2% accuracy)
The SMETS2 E470 device features 12 total energy registers containing
active, reactive and apparent energy for both import and export. Combined
totals are also provided in some cases.
All the registers are updated with values from the measurement system at a
maximum of once per second.
All registers contain cumulative values in Wh, VArh or VAh. The
representation is settable per energy registers group – in Wh (VArh, VAh)
or in kWh (kvarh, kVAh) with up to 3 decimal places.
The total energy registers can be stored in profiles, read out via
communication or shown on display.
The SMETS2 E470 device features 48 active imports rated registers for
use with time-of-use tariffs and 32 (8x4) active import rated registers for
use with time-of-use with consumption block tariffs.
All rated energy registers contain values in Wh, VArh or VAh. The
representation is settable per energy registers group – in Wh (VArh, VAh)
or in kWh (kvarh, kVAh) with up to 3 decimal places.
The rated energy registers can be stored in profiles, read out via
communication or shown on display.
Every 30 minutes the meter calculates the demand (average power). If the
latest calculated demand is greater than a stored maximum, then the
maximum is updated.
There are four registers for average demand of active import and active
export over the current half-hourly integration period and the previous half-
hourly integration period.
D000058620 en a – E470 Series 3 SMETS2 100 mm – ZCX310 – User Manual and Functional Description
Issue 1.2 Energy Registers