Deviation To Gmt; Battery Backup; Operational Modes; Credit Mode - Landis+Gyr E470 Series User Manual

Functional overview
3.5.5

Deviation to GMT

3.6

Battery backup

3.7

Operational modes

3.7.1

Credit mode

D000058620 en a – E470 Series 3 SMETS2 100 mm – ZCX310 – User Manual and Functional Description
Issue 1.2
Start of Daylight Enter the month, the weekday and the earliest possible day on which the
Saving Time daylight saving time must be activated.
Also enter the switching time (usually 01:00h) and the time shift (usually +1h).
End of Daylight Enter the month, the weekday and the earliest possible day on which the
Saving Time daylight saving time must be deactivated.
Also enter the switching time (usually 02:00h). The time shift is the same as
defined for activating the daylight saving but in the opposite direction.
Table 3 DST parameters
The deviation of normal time to GMT for other time zones can be set in 30
minute increments in range from -720 min to 720 min. Setting the deviation
does not affect the internal device clock. The deviation is simply
added to the device clock to form the normal time for the relevant
time zone.
If the time and date
unchanged.
A leak-resistant battery provides back-up power for the calendar clock. The
battery is rated to provide sufficient capacity for the life of the meter without
the need for replacement.
Battery life is dependent on the following main factors:

Normal Current drain from the clock circuit

Loss of capacity due to internal resistance of cell

Loss due to temperature

Effective loss due to lowest working voltage of clock circuit
The battery installed in the SMETS2 E470 has a capacity of 540mAh.
When using the above factors, and assuming an extended lifetime of 20
years, the remaining battery capacity is calculated to be around 40% at the
end of this period. The battery shall therefore not require changing in its
operating lifetime.
The E470 meter can be operated in the following operational modes:

Credit mode

Prepayment mode
In credit mode, the meter can:

Receive commissioning messages

Send and receive data via the communications hub

Record electricity consumption and accounting.
This mode supports full credit functionality as described in SMETS2/GBCS.
In credit mode, the default display that is normally shown on the display is
the total meter index in kWh for active import:
is adjusted the deviation value will remain
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