User's Manual

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REX Meter
3 Operating Instructions Technical Manual
3-4 30 November 2006
The LCD test (all 8s) will always display for 2 seconds immediately after power is
connected to the REX meter or after a power restoration from a power failure.
After the initial LCD test, the display will then scroll through all programmed
displayable items before beginning the display cycle again with the first
displayable item.
The meter performs a self test at power restoration and once every 24 hours to
make sure it is operating correctly. The self test ensures that the REX meter is
functioning properly and that its displayed quantities are accurate. See “Meter
Self Test” on page 5-1 for more information on self tests, errors, and statuses.
Resetting the REX
Meter
When using the optical port to issue commands to the REX meter, the optical
password must be used. The optical password can be specified when the REX
meter is ordered. Additionally, the optical password can be changed using Elster
Electricity meter support software.
Using the optical port requires removing the meter cover and placing an optical
probe onto the optical port that is molded onto the face of the meter’s inner
housing.
Demand Reset
A demand reset can be performed in one of two ways:
■ issuing a command over the optical port
■ issuing a command over the network
When received over the network, the command is typically received before the
demand reset date and schedules the demand reset to occur at the next
midnight crossing. The meter can also be instructed to perform the demand
reset immediately.
Regardless of how the demand was reset, the meter does the following when
resetting the demand:
■ copies the current billing data to the demand reset data area
■ increments the demand reset count
■ clears the status flag indicating the demand threshold was exceeded
■ resets the maximum demand to zero
Demand reset data area. In all demand reset occurrences, the meter copies
the present billing data and stores it in the demand reset data area. This data is
referred to as previous billing data because its general purpose is to preserve
the data as one billing period ends and the next billing period begins. The meter
stores only one copy of the previous billing data. The next demand reset
overwrites whatever is currently stored as the previous billing data.