User's Guide

36 A c l a r a R F E l e c t r i c I - 2 1 0 + c U s e r G u i d e
Supported Measurements
Supported Measurements
It should be noted that the meter supports a wide variety of measurements, but the
particular measurements available at any given time will be governed by the meter
programming. An I-210+c is considered to be a demand meter, demand / load
profile meter, or time of use / load profile meter depending on its softswitch
enablements. The meter supports 8 Data Accumulations. From this it can support 4
billing measures and 2 demand measures. The values programmed in the meter as
billing measures can be used for DS, OR, or DR messages. The values
programmed as demand measures can be used in DR messages.
The choice of daily demand is done at the expense of monthly demand. They are
mutually exclusive. MeterMate allows the meter to perform an Automatic Demand
Reset at a user-specified period. If this is set to a Reset interval of 1 day, the meter
will synthesize daily demand. Then, with the meter resetting demand every day,
the NIC must be configured to collect previous demand values with the Daily Shift
message.
It should be noted that when demand is enabled, both maximum demand and a
cumulative demand will be captured by the meter and either or both may be
reported.
Since a demand reset causes present maximum demand to be zeroed, and the
timestamp for the maximum to be made invalid, it is recommended to not
configure the module to report present maximum demand as part of a DR message.
It could however be useful as a DS message for the CSR who wants to monitor
progress towards a monthly maximum demand. For utilities that instead desire
information regarding a daily maximum, previous maximum demand values, and
the demand reset counter, these should be placed in the DS message list.
LP Data
The measurements supported by NIC firmware version 1.70 are listed in LP
Measurements Supported with NIC Firmware Version 1.70 on page 37.
The Load Profile Interval Length selected for one channel of LP data in the Aclara
RF Network I-210+c applies to energy measurements in all channels. Selecting
one interval size is done at the exclusion of other sizes. The duration mentioned in
the maximum, average, or minimum values of voltage, current, or temperature
refers to the duration over which the study was made. Voltage (for example) is
measured cycle-by-cycle to identify the largest, the smallest, and to gather data to
compute the average. At the end of the interval, the smallest voltage (measured
over one cycle), the largest voltage (measured over one cycle) and the average
voltage (measured over the entire LP interval length) is determined and the results
published to the meter’s LP tables. The NIC will in turn harvest these entries (if
configured to do so) and report them to the headend via an interval message.