Operating & Maintenance Instructions 9
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10 TEST INDICATOR
A red test output LED is provided which pulses in accordance to the following configurations:
Import only meter: The LED pulses for forward energy only
Import meter with Power Flow Insensitive enabled: The LED pulses for forward and reverse
energy
Import/export meter: The LED pulses for forward and reverse energy
The LED is permanently illuminated when in anti-creep (i.e. below starting current) for all
configurations.
The test indicator pulses are 40ms wide. The pulse value is 1000 p/kWh for all meter ratings
and is marked on the meter nameplate.
The LED is not modulated.
11 SECURITY FEATURES
The following security features are available.
11.1 Data Retention
All data is retained for the nominal life of the meter and is stored in non volatile memory.
Registration data for the currently active rate is saved approximately every 2 hours; when a
rate changes to become inactive; when a power fail is detected.
Security data is saved approximately every 2 hours or if a power fail is detected.
11.2 Recordable Security Features
Recordable security features are listed below. They can be read as follows:
IrDA communications port and optional serial data port (IrDA meter)
IEC 62056 - 21 port (IEC 1107 meter)
Security features are optional in the display sequence.
11.2.1 Reverse Energy
Reverse Run Count
The meter detects and stores:
The number of reverse energy events to a maximum of 255. The register will then roll over
to 1
Reverse energy event Flag
An event is detected if, in a single occurrence, an amount of reverse energy exceeding a
preset threshold (Configurable at manufacture between 1Wh and 250Wh, [default 5Wh]) is
measured. Two rate meters store a single count of reverse running events.
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