Page 20 of 32 Liberty gas EG4v12 user cum maintenance manual BGX701-240-R01
The meter will reject UTRNs if they fail authentication (for example, UTRN is not for this meter, duplicate,
etc.) and are invalid. Each time a UTRN is rejected, the meter displays a failure message along with a failure
reason.
When entering a UTRN via the meter’s keypad, there is a timeout period of 20 seconds after which time, if no
key has been pressed the meter will begin automatic authentication of the UTRN.
The meter allows five (5) successive incorrect UTRN entries (via keypad) after which it locks key ‘A’ (key ‘A’ is
used for initiating UTRN entry) for 30 seconds with a ‘Keypad Locked’ message on its display. After that, the
lock period doubles with each incorrect UTRN until the 10
th
attempt is reached when the lock period is 16
minutes. Acceptance of a correct UTRN resets the incorrect UTRN counter and the lock period to zero and
takes necessary action based on the UTRN type.
In case, the tokens are sent from the mobile app:
If seven transactions are already performed in the last 30 minutes, the app blocks the user for the next 15
minutes.
5.6 Retain credit
This transaction is performed to stop the deduction of standing charges in the meter when you are not
consuming the gas for a longer duration.
A retain credit token of less than or equal to ten rupees is generated from the vending station. This token is
entered into the meter and a refund code is generated for the remaining balance. This token stops the
deduction of standing charges in the meter. Once a new recharge token is entered, the meter starts
deducting the standing charges normally.
5.7 Meter configuration and functionality
The EU verifies and authenticates the commands it receives before executing them. If authentication fails,
the meter will reject the command.
The following parameters are configurable in field Liberty EG4v12 meters via authenticated UTRNs (‘Vend +
tariff’ type):
● Tariff rates and slabs
● Standing charge
● Credit addition (recharge through vend)
5.8 Account-based prepay alerts
Liberty EG4v12 meters operating in prepayment mode displays visual alerts (see Figure 6 ) under the
following circumstances based on the state of its account:
● ‘Low credit’ alert if the credit level in the meter’s account reaches or passes below the configured
low credit threshold.
● ‘Emergency credit available’ alert if the credit level in the meter’s account reaches or passes below
the configured emergency credit threshold, thereby making the users aware of the availability of
Emergency Credit.
● ‘No credit’ alert if the credit level in the meter’s account reaches or passes below zero credit
threshold.
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