17
Instruction Manual
CIRWATT B 101-102
2�23 - SYNCHRONISM
The device must have an internal clock with a calendar to perform the billing closures, maximum value
calculations, preparation of load curves and event dating and alarms.
Basic features:
The Accuracy of the clock will have a maximum deviation of 0.5 s/day. The accuracy features of
the internal clock are defined in EN 62054-21.
The clock can be synchronised and the time can be set locally or remotely, but this must always
be done with the communications protocol.
The operating reserve will be over 2 years in the absence of voltage.
2�24 - SECURITY
2�24�1 - COMMUNICATIONS
There are two communications modes:
Data reading�
The energy can be read from the energy meter without the use of a password in IEC-
62056-21 Mode C.
Device parameter configuration�
A password is used to read all the parameters and records. It is
also needed to synchronise the date-time and to program the energy meter.
2�24�2 - TAMPER DETECTOR
The device will generate an event when the unit’s terminal cover is removed. The alarm can only be
deactivated via the communications protocol. The minimum time between two tamper events is 60
seconds.
2�24�3 -
MAGNETIC FIELD DETECTOR (OPTIONAL)
The device will generate an event when the unit’s terminal cover is removed and an alarm will be acti-
vated. The alarm can only be deactivated by the communications protocol. The minimum time between
two intruder detection events is 60 seconds.
2�24�4 -
NEUTRAL CURRENT MEASUREMENT (OPTIONAL)
The energy meter can measure the neutral current to determine potential cases of fraud. This current
is not calibrated, but an error of under 2% is guaranteed at the energy meter’s nominal current.
