Liberty 100 Smart Electricity Meter Technical Reference Manual
An internal switch is provided for supply disconnection/reconnection controlled by both the meters business
logic and remotely over the WAN/HAN. A battery-backed internal clock maintains the meter’s date and time.
Removal of terminal cover, main cover and communications module is detected and logged in both power on
and off conditions.
Internal sensors monitor external magnetic fields allowing abnormal operating conditions to be logged and
reported.
3 Product Description
3.1 Liberty 100 Main Features
Figure 2: Liberty 100 electricity meter
The integrity of the meter seals should be checked periodically.
LCD information window
Liberty 100 has a backlit, monochrome LCD for displaying metering data, alerts and other relevant information.
Keypad
12 keys, each 3.8 mm x 6.8 mm in size arranged in a 3x4 array provide the user interface for viewing data,
acknowledgment of alarms and alerts and the means of manually entering prepayment UTRNs if the GPRS
interface is not working. The keypad has ten 0-9 numeric keys and two special keys marked ‘A’ (blue) and ‘B’
(red). Key ‘5’ has a raised dot to help visually impaired users to navigate.
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