Meter Cover Opening (Optional Fitting); Terminal Cover Opening (Optional Fitting); Dc Magnetic Field Intrusion; Alert Notification - Landis+Gyr E230 User Manual

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6.4.3

Meter cover opening (optional fitting)

6.4.4

Terminal cover opening (optional fitting)

6.4.5

DC magnetic field intrusion

6.4.6

Alert notification

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With the occurrence of event 66 (Date/time invalid) RTC failure, all
events except events 9, 10, 11 and 33-36 continue to be logged, but do
not necessarily have valid date and time stamps. Tamper persistence
times will also not be logged. To prevent the event log from filling as a
result of event 66, events 66, 76 and 89 are only recorded once, until the
clear event log is performed.
A switch can be fitted to the meter, which will open when the top cover is
removed. The meter will record the number of times the switch is
activated. This feature is incorporated into the battery back-up circuit
and is therefore operational even with no mains supply to the meter. If
the tamper is triggered during a power fail situation, the meter will only
detect one alert. For example, if the cover is removed and then replaced
and then removed again, only one tamper count will be recorded. The
tamper register will need to be reset when power has been restored in
order for it to begin registering any further no power alerts.
A similar circuit to the above applied to the Terminal Cover.
The meter will detect the presence of a strong DC magnetic field and
can be used to activate the tamper Alert. There are two separate
detection methods, each having a separate event number: Magnet
detection (event 55) and Strong DC Field (event 134). Event 55 is the
first indication of a potential tamper attempt. Event 134 indicates that the
energy measurement ICs have been affected by the presence of a
strong DC magnet. Energy measurement must be treated as though it
has been tampered with, which may result in inaccurate energy
measurement from the point of detection.
The meter can be configured to activate the front panel Alert LED, when
an alert is detected, and/or illuminate the Bell alert icon on the meter
display. Any combination of the following alerts can be configured:

Meter Cover Tamper

Terminal Cover Tamper

DC Field (Magnetic fraud)

Voltage Missing (ZMR100xR only)

Phase Reversal (ZMR100xR only)

Voltage Without Current (ZMR100xR only)

Voltage Imbalance (ZMR100xR only)

Current Imbalance (ZMR100xR only)
With the exception of meter cover tamper, terminal cover tamper and DC
field, all alerts/events have separate definable thresholds and include:
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Operation