Page 14 of 32 Liberty gas EG4v12 user cum maintenance manual BGX701-240-R01
5 Functional specification
The following functional features of Liberty EG4v12 are described in this section:
1. Meter operating modes
2. Registers and snapshots
3. Time keeping
4. Accounting
5. UTRN Transaction
6. Meter configuration and functionality
7. Meter valve state
8. Detecting and logging events
9. Communication channels
10. Meter reading data
11. Engineering Codes
5.1 Meter operating modes
Liberty EG4v12 meter operates in pre-payment mode. Also, there is a commissioning mode for commissioning
of the meter.
5.1.1 Prepayment mode
In Prepayment mode, the meter will perform billing actions as detailed in ’Device information
Device information consists of the meter serial number, meter program name, commodity type and the
meter type.
Billing snapshot’ in Section 5.2.2.1. Prepayment mode supports four different accounting zones as detailed in
Section 5.4.2 ‘Accounting zones in prepayment mode’ and generates account-specific visual alerts. Also, this
mode supports the following features:
● Adding an absolute value to the meter’s account through meter keypad or mobile app
● Displaying account-specific messages
● Emergency Credit and Friendly Credit support
● Meter valve operation based on the account state, Friendly Credit and Emergency Credit
configurations.
● Retain credit
The meter activates the following functionality when operating in this mode:
● Slab or Block tariff
● Events and tamper detection
● Prepayment features:
o Sending visual alerts on display when meter credit becomes low
o Updating, activating and repaying of Emergency Credit
o Disconnecting and reconnecting supply
5.1.2 Commissioning mode
After physically installing the meter, the commissioning process is carried out. This process is initiated by
the gas meter when it is put into commissioning mode (by pressing key ‘0’). If carried out correctly, the
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